august, 1962 - American Radio History
AUGUST, 1962
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PRO 1. UCT
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AmericanRadioHistory.Com
LK -72 80 WATT AUPL FIER
... no effort
nas teen spared to make
the building jcb simple, a lot of fun, and
yet have th,b t Jilde- enc up with a urit
that looks end wort -s Ike taciory -bu It
VV-i:zed :hrcugh the
egiipment
complete corstruc:on in on y about
hours. A ccnservative y designed,
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versatile, integrated stereo amplifier
that siould be a oleasure t: build and a
pleasure to use.'
.
.
.
Ele_tron -cs Wor'i
LK -150 POWER AMFLI=IER
.. Checking my notebook for -Ivfeelings aboi: the mus c capabili=i =s
I
find only two words "imma:ulate
sound" ... This unit belongs to t fiat very
small group of components whi :h allow
you :o "see" past the eq Jipment n-o the
pert wman:e itself .. "
American Record Guide, April 562
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LC-21 PREAMPLIFIER
"Noise
...
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LT -110 FN MJLTIPLEX TUNER
a fire stereo tuner a -d a-" ur"
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Audio, April, 19f?
"
is
lisiering conditions . Listening
mesi: with tie LC -21 proves to be es
...
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"
if ).0 -1 have hesitated io go irto
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shcws you how to enjoy sier :o FM the
easy way .. '
Electronics Illustrated, ,.&4, ,'962
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-o
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ward ng as is was with tie dower amp ier. It impinges nothing of itself on tt e
performance wiile arc-icing posi-i -e
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4merican Pec)rd Gulch, April, 156?
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Hi- Fi/5'.e. eo RevieN, JI.ne, 196'
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Scott Kits win
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"The packaging and instruction manual for the Scott LK -72 kit help make the assembly and wiring of this amplifier painless and even pleasurable. Each stage of
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room for error, and which were obviously prepared with more than a passing
sense of humor. There are no outsize "blowups" to hang on the wall, but
rather meticulously detailed drawings, in color, of each stage of the work,
and all contained in the manual in the normal sequence of steps used by the
builder. The instructions are prefaced with helpful hints on how to unpack the
kit, what tools to select, correct soldering procedures, ana so on. For those who are
interested, there also is a section explaining now the amplifier operates, stage by
stage. All told, this is a neat, attractive, very well -designed k t, and one which gives
every assurance of successful completion even in the hands at the inexperienced
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High Fidelity, Apri!, 1962
AmericanRadioHistory.Com
H. H. Scott, Inc., 111 Powdermill Rd.,
Maynard, Mass. Dept. 035-08
Export: Morhan Exporting Corp.. 458 Broadway. N.
Y
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+u11 -color folder
showing the complete line of Scott
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Rush me your new
Name
Address
City
State
0 SCOTT
C.
Vol. 46, No.
1462
S
R
--
_\
Est
S
1917
C. G. McPROUD Publisher
AUDIO
Editor
DAVID SASLAW
SHERWOOD
only for those who want the u,:,
JANET M. DURGIN
Production Manager
Contributing Editors
HENRY A. SCHOBER
Business Manager
SANFORD L. CAHN
Advertising Director
EDGAR E. NEWMAN
Circulation Director
Representatives
Bill Pattis & Associates,
4761 West Touhy Ave.,
Lincolnwood 46, Ill.
James C. Galloway,
6535 Wilshire Blvd.,
Los Angeles 48, Calif.
PRODUCT PREVIEW SECTION
Basic Power Amplifiers
Basic Amplifier Kits
Preamplifiers
Preamplifier Kits
Integrated Amplifiers
Integrated Amplifier Kits
Basic Tuners
Basic Tuner Kits
Tuner -Amplifiers-Receivers
29
29
30
31
32
34
35
36
39
40
4
>
:
'i
i
Stereo Receiver$299.50
14' deep. Combines Sherwood's
brilliant FM stereo tuner design, two 32 -watt
amplifiers, two phono /tape pre -amplifiers, and
all circuitry necessary to receive FM stereocasts.
161/4" x
HAROLD LAWRENCE
CHARLES A. ROBERTSON
41'
x
RAVINIA Model SR3 3 -way speaker system
$139.50. Walnut Cabinet 26%' x 15" o 131'
deep. 12" high -compliance woofer, 8' midrange,
and 21/2" ring -radiator tweeter. Features low
intermodulation distortion, flat frequency response (± 21/2D131 to 17 KC.
CHESTER SANTON
Articles
i
and T. C. Lawson
19
C. R. Gray
24
,11annie Horowitz
S3000IY FM MX Stem; tuna $160.00. 14 x
41/2" x 101/2" deep. Identical tuner design to
S -8000. Other tuners: S -2100 FM Stereo AM
Tuner $199.50. S -2000II FM AM Tuner $150.50.
(Same but without FM stereo feature)
8 Chester Santon
78 Eduard Tarnall Canby
82 Charles A. Robertson
Turntables with Arms
Turntables without Arms
Phono Cartridges
Tone Arms
Loudspeaker Mechanisms
Loudspeaker Systems in Enclosures
Tape Recorders
Microphones
Headphones
Miscellaneous
AUDIO in General
Audioclinic
Letters
Audio ETC
Editor's Review
About Music
Advertising Index
:
S -8000 FM /MX 64 -watt
JOSEPH GIOVANELLI
AUDIO Reviews
Light Listening
Record Revue
Jazz and All That
.
EDWARD TATNALL CANDY
AUDIO
Transistorized FM Front Ends
Measuring and Matching the
Phono Equalization Curve
.
2 loseph Gioranelli
6
FM Stereo Multiplex Adapters may be used to
convert Sherwood and other FM tuners for stereo cast reception. $49.50 to $69.50.
43
46
48
52
56
60
68
75
93
96
--?^-
- --
6, to er C, 01
t
-5500 II 64 -watt Stereo Preamplifier -Amplifier
$164.50. 14" x 41/2" x 121/4 " deep. Identical to
amplifier used in S -8000. Other amplifiers:
S -5000 tl 80 -watt Stereo Amplifier - Preamplifier
$199.50.
S
I
This typical room setting
includesSherwood's"Superb Stereo Starters,'
-
-8000 Receiver and
two SR3 Loudspeakers.
one
S
Sherwood Electronic Laboratories, Inc., 4300 N.
California Ave., Chicago
18, Illinois. Write for complete technical details.
12 Edward Tataal! Canby
16
88 Harold Laurence
106
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Mc
Mllf
MITI." 01
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ea.
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'tN
AUDIO (title registered U. S. Pat. Off. ) is published monthly by Radio Magatines, Inc. , Ilenry A. Schober. President; C. G. Merroud, Secretary. Executive
and Editorial Offices, 204 Front St., Mineola, N. Y. Subscription rater-U. S.,
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AUDIO
AUGUST, 1962
Write Dept. A -8
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AmericanRadioHistory.Com
Hear! Hear!
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in the front end. If this check does not
show a bad tube, you must then check all
:
Joseph Giovanelli
3420 Newkirk Ave.
Brooklyn 3, N. Y.
Include stamped, self-addressed
envelope.
Measuring Turntable Performance
Q. My question concerns a turntable I
recently built -the liard way, not from a
I-it. I cannot be satisfied, however, until I
measure the results. How are these measurements made? Rudolf Bohm, New York,
New York.
A. The main two criteria by which turntable performance is measured are its
rumble content and its wow and flutter
content. I naturally assume that the speed
is accurate.
Rumble is measured with reference to
a 1 kc tone recorded at 7 centimeters per
second. The tone is impressed on a dise.
The disc is played back and the output
level produced by the tone is then measured. Then the tone ceases and the stylus
passes over an unmodulated hand of dise
material. The rumble is noted as being so
many db below the reference tone. In this
test the RIAA compensation is used.
Wow and flutter are measured by means
of a wow and flutter meter. This is a
meter which has a discriminator circuit in
its output. A tone is played again, and the
meter will swing above and below a corresponding zero point (representing the
tone's actual frequency). The meter pointer
moves along a scale calibrated in terms of
percentage of wow and flutter. The motion
of the pointer will indicate which is present, and to what degree. This test is one
which you probably cannot simulate in
your own home.
What is Happening?
Q. I have a component hi fl set consisting of a tuner, basic amplifier, and a
speaker system. I have noticed that when I
use my exterior TV antenna for FM reception, the signal increases over the non
antenna level, plus the fact that on one
station only, there is an increase in noise.
This noise sounds like wind (a rushing
sound) and has no discernible audio components. When I disconnect one end of the
300 -ohm twin lead, the noise becomes inaudible. When I have it connected, the
noise conies back. Benrard Eisner, New
York, New York.
A. From what you write about the character of the noise, I suspect that the noise
is the tuner going into oscillation, probably as a result of a defect in the front
end. Certain tuners will do that, especially
when the soldering of the braid associated
with the variable condenser has been poorly
done.
Before doing anything to the innards of
the tuner, check the tubes, especially those
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screen bypass capacitors and decoupling
capacitors associated with the front end.
A tube checker may not always show up
such defects. The best thing to do is to
replace these tubes with known good ones
and note the performance of the tuner.)
If this produces no results, resolder all
ground connections, especially those associated with the variable capacitor. That
should do it.
The Push-Pull Parallel Output Stage
Q. I would like to operate the output
tubes of Mr. Voss's amplifier ( "Triode operation of HT88's", March, 1961 Armo)
in a more conservative manner. Push -pull
parallel operation suggests itself, but
should I reduce the plate voltage to change
the bias setting in order to maintain the
same cathode current as for two tubes?
In the event of the former, about how
great a reduction in voltage is necessary?
Would it be necessary to change the output
transformer? Andrew H. Frank, San Francisco, California.
A. When arranging a circuit for push pull parallel operation there are several
facts to keep in mind.
Let us assume that we are converting
any amplifier for this type of operation.
First, the impedance offered by this combination will be lower than it would be for
a similar amplifier operated in the conventional push -pull arrangement. An output
transformer having about half the impedance required for the push -pull configuration must be used in the circuit. Because such an amplifier is capable of
giving you about twice the amount of
power that could be delivered by the push pull amplifier, you must use an output
transformer having a greater power -handling capacity than would be required for
the more standard circuit arrangement.
You would not adjust the bias so that
the total cathode current taken by the
four tubes is the same as would be required for two tubes. If you did that, the
bias would he too great. Greater distortion
would result. True, each tube would run
cooler than it would in the push -pull circuit if the bias were reduced. However,
this is not the manner by which cooler
operation should be accomplished. If you
want to run the tubes in a more conservative manner, you should reduce the plate
and screen voltages, adjusting the total
cathode current accordingly. (The correct procedures for doing this latter operation are shown either directly in the tube
manual or can be worked out by means of
the Homographs provided therein. Therefore, this procedure will not be discussed
here.)
Even when the tubes are to be run more
conservatively, it is likely that the total
power consumed by the four tubes will be
more than that consumed by the two tubes
found in the original amplifier. Therefore,
a power transformer having a greater
AUDIO
2
AmericanRadioHistory.Com
AUGUST, 1962
A
This is where your investment
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pays off
Chances are that sooner or later you will spend
more on your records than you do on any record
player. More, it may be, than the cost of your
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is dependent upon records and the unit that
reproduces them. This is exactly why more
GARRARD Type A's, for example, have been
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fidelity record playing equipment, without regard to cost. Just consider this...
Most people today want to use one of the ultra
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dynamically- balanced, counterweight adjusted,
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For illustrated literature, write Dept. GK-12,
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current capacity must he employed, unless
the one already used has the necessary reserve capacity.
It is possible that the rectifier originally
used in this particular circuit cannot withstand the additional drain. Hence it may
have to be paralleled by an additional rectifier. It is also possible that the current handling capacity of the filter chokes must
be increased.
It is possible also that you will have to
redesign the feedback circuit. Because you
are now using a different output transformer, its characteristics are likely to
be different from those used in the original
design of the amplifier.
When you operate the amplifier in this
manner,
ner, you will obtain some increase in
power. This increase, however, will depend
upon whether or not you lowered the
plate voltage to the output tubes. If you
greatly lower the voltage, you are likely
to come out with about the same power
output that you would have obtained with
the original circuit, and with somewhat
less electrical efficiency. You would gain
an amplifier whose output stage runs cooler
per tube. Hence, you would have fewer output tube failures than would be true of the
original design.
Starved Circuits
The majesty of a full symphony,
the grandeur of a large chorus or
the vibrant throbs of a mighty organ
-these give the thrill and stir in a
live performance. They produce big
enveloping sounds. Just as their
origin is in a large body, so their
re- creation must come from a large
body. As a miniature orchestra can
never equal a full symphony in bigness of sound, so a small loudspeaker can never compare in
fullness with that of a large one.
Bozak, pioneer exponent of big
multiple unit speaker systems,
offers the B -4000, also known as
Symphony No. 1, for those who
seek the grandeur of big, full sound
but whose space does not permit
the celebrated B -310A Concert
Grand.
Used in matched pairs, the
B -4000 has no peer for stereophonic re- creation of musical per-
formances. Through
a
unique
configuration of Bozak speakers,
two B -4000 systems spread the
music throughout the listening
room with true perspective, not
only in width but also in depth.
Instruments sound in their proper
places, not just left, right and
center, but closer or farther from
the listener -as in the live performance. No truer reproduction
has ever been achieved. The proof
is in the hearing.
The speaker complement in
each consists of two 16 -ohm Bozak
B -199A 12 -inch woofers, one
8 -ohm Bozak B- 8008 -inch speaker
used as a mid -range, four Bozak
B -200Y dual tweeters in a vertical
column array, and an N -105 LC
crossover network with 6 db./
octave crossover. Woofer roll -off
is at 400 cycles, mid -range tweeter
crossover at 1500 cycles. These
are housed in a distinctly styled
infinite type baffle of 8 cubic foot
volume.
SPECIFICATIONS:
Useful frequency response: 35 to 20,000 cycles
Impedance: 8 ohms
Q. 11lual
a starved amplifier? Hou'
does it wort,.' What are its advantages and
disadvantages.' What design data is
needed? L. Foisg, Brooklyn, New York.
A. When considering "starved" circuits,
the thought arises as to what is being
starved.
The answer is that the tubes are starved
for both plate and screen voltage. Most
"starved" circuits employ pentodes. What
happens in operation is that a high voltage
is applied to the electrodes of the tube
through ridiculously high screen and plate
load resistors. Two megohm plate loads
and 10 megohm screen resistors are not
at all uncommon. The slightest change in
plate current (created by a small change
in grid voltage) will cause a considerable
voltage change across the plate load resistor and hence, considerable voltage gain
can he realized from the stage. Because of
the high impedance of the entire circuit
shut capacitors are extremely detrimental
to high -frequency response. Some such amplifier circuits I have seen are Hat to only
1000 cps.
Some correction of this deficiency can
be achieved by the use of either negative
or positive feedback. This feedback must
be selective so as to boost the otherwise
suppressed frequency band.
In 1958 AUDIO ran an article called "The
Purple Cow Amplifier," in which the first
stage was starved.
Other information concerning these circuits is available in the Radiotron Designers' Handbook and Terman's excellent
book, Radio Engineering.
]
Suggested amplifier power: 30 -watts or greater
Dimensions: 44" high
x
273/4" wide x 16" deep
Give
See your franchised Bozak
dealer, or write
The
Box 1166, Darien, Connecticut
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AUDIO
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AmericanRadioHistory.Com
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AUGUST, 1962
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AUGUST, 1962
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AmericanRadioHistory.Com
FOR THE ULTIMATE
IN AUDIO TAPE
t
RECORDING
...
over
LETTERS
Effects on Phase Shift
SIR:
Authors Klein and Tributsch of the arti-
"Effect of Phase Shift on Hearing,"
cle
agn e cord
Known and used the world
to
satisfy the most
demanding requirements for
performance and
reliability
in audio recording and reproduction.
in the July issue obviously did no research
of literature, know little about hearing,
and didn't try any frequencies below 15011
cps when they varied interaural phase difference. In my opinion the interaural phase
difference decidedly shifts the apparent
image from side to side when using signals
below 15110 cps -as a matter of fact, 3 deg.
is the DL at some frequencies. As refer-
Measurement of Hearing, by
Experiments in Hearing, by von
Itekesy; and Handbook of Experimental
Psychology, by S. S. Stevens.
ences, see:
TTirsh;
JACK F. CI'RTIS, Ph.D.,
Research Associate,
J
go
)
,
T,
The C. W. Shilling Auditory
Research Center, Inc.
348 Long Hill Road,
Groton, Conn.
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THE PT
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In all the discussion of speakers vs. earfor stereo one point has been left
out. To me it is so obvious that I must be
wrong. When listening to stereo with
speakers the sound comes from in front of
you. If you turn your head, the sound will
come from the side toward the speakers.
With earphones, the sound always comes
from the front no matter which way you
face. This would not happen in a live perphones
formance.
F. MCDONALD,
Vista Via,
Lafayette, California
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under the worst possible conditions (signal
into one channel, the other three alternately open and short circuit) variation
was not more than 0.25 (16. Admittedly,
the feedback loop is adjusted to give a
gain of unity with one section of an
ECC83, but by using instead a high -mu
pentode (e.g., an EF86), the feedback can
be reduced somewhat without degradation
of this already low interaction figure.
The "anode follower" has another advantage, too -the output impedance is of
the order of 3000 to 4000 ohms. In many
cases, a cathode follower is unnecessary. I
checked the total harmonic distortion of
my particular example and the lowest reliable measurement I could obtain was 0.15
per cent at 5 volts output. Noise and response compare with Mr. Gerbracht's design.
Headphones
SIR:
748 STEREO
The Olympian
champion of
recorders. 33/4 and
71/2 ips. 4 -track play
and record.
here, so we British tend to settle for rather
more simple configurations.
But I will take him up on his dismissal
of the "anode follower" mixer circuit. I
checked my own four -channel unit and
In his discussion of transistor high -fidelity amplifiers in the May issue, Mr. Cooper
omitted reference to the principle of very low- impedance drive of an output stage
using standard alloy transistors.
As a means of improving common -emitter frequency response, the principle is well
known but the application of it to high fidelity audio power amplification was first
demonstrated, I believe, by D. W. Taylor
at the last EIA /IRE. Fall Meeting.
The technique lies in the use of a simple
trifilar transformer to unity- couple a common- collector driver to the bases of the two
output transistors. Even the most conservative design of the transformer results in
one weighing a few ounces and easily handmade or manufactured. The resulting cutoff frequency is many times the beta cutoff
frequency.
Although this arrangement may not have
been used commercially, the combination
offers a functionally excellent and economically attractive means of obtaining
high -fidelity audio power from alloy transistors.
W. BARRY CLARK, Engineering Division,
Dominion Electrohome Industries Ltd.,
Kitchener, Ontario
Mixer Design
SIR:
I have just read Mr. Gerbracht's article
on mixer design in the March issue. Despite the complicated circuitry and the ele-
gant mathematics, I can't help but feel he
is using a power hammer to crack a peanut.
But then, components and tubes cost more
Finally, if I did want a stereo mixer I
would question the value of a design that
only added the "sum" components in the
"separation" control. Ideally, one should
have control over both the "sum" and "difference" components. Such a circuit should
he fairly easy to design.
REGINALD WILLIAMSON,
78, Helena Road,
Norwich, England
Electronic Organs
SIR:
I am very pleased to see the articles on
electronic organs in recent issues. I think
there are enough organs and audio fans
who own organs who will agree with nee
that there should be more of these articles
or even a section devoted to them. There
are so many interesting topics, such as
accessory equipment, circuitry for additional voices, modifications of existing
voices, percussion units, reverb units, and
so on
I
ad infinitum.
have just completed a Schober Concert
Organ, n project enjoyed thoroughly, and
one I have wanted to tackle for years.
Technical knowledge is a help in building
such a kit, but definitely not a necessity.
For any audiofan readers who have tape
recorders send like organ music, there is a
I
tape club devoted to the organ exclusively.
Drop a card to our secretary, Carl Williams, 152 Clizbe Ave., Amsterdam, N. Y.
for particulars.
TOM CHRISTENSEN,
Publicity, Organ Music Enthusiasts,
130 Annatte Ave.,
Smithtown, L. I., N. Y.
FM
Multiplex Tester
SIR:
I am anxious to learn if you are able
to advise me as to the construction of a
simple-as-possible signal generator for testing multiplex adapters or the adapter section of an FM stereo tuner. Is there any
possibility of your publishing a constructional on such
a
device in the near future.
E. A. GARVEY,
1658 No. 21st St.,
Arlington 9, Va.
(Such a generator is not very simple, but
one kit is announced currently in the advertisement on page 10.5. ED.)
AUDIO
6
AmericanRadioHistory.Com
AUGUST, 1962
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AUDIO
AUGUST, 1962
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7
AmericanRadioHistory.Com
iug, of buried Etruscan treasures adds complications to an already busy plot.
Romantic interest is supplied by 19- year -old
Michele Lee of Los Angeles, invading Broadway in her first sizable engagement. Her major moments occur during I'm All I've Got
and Steady, Steady. In addition to his two
love songs, If I lVere the Man and Miranda,
IGHT LISTENI
Slept supplies the show's modest quota of
Italian atmosphere in Rome and the title tune
"Bravo Giovanni." George S. Irving, at one
time the police inspector In "Irma Ia Douce"
and now the competing restaurateur, shares
Chester Santoro
David Rose:
Channel Sound
M -G -M Tape STC 4004
The running battle between disc and tape
has gone through several phases as each medium has introduced its own improvements.
Anyone following the struggle between stereo
disc and quarter -track tape will find fresh
material for argument and discussion in
M -G -M'a 21 Channel Sound Series. Depending
on the playback equipment you use, it is still
possible to "prove" that either medium is
superior in A -B tests of stereo discs and four track tapes containing the same material. It
seems to me, in its latest relative standing,
the disc still outperforms the tape in the mutter of extreme highs. In a clear majority of
cases, the highs on the record contribute more
warmth and hall sound than those on the
four -track tape. The earliest stereo records
couldn't do this but discs (and pickups) have
come a very long way. Four -track tapes, on
the other hand, have changed far less since
their introduction. All through the seesaw
battle, quarter -track tape, though handicapped
its signal -to -noise ratio, has provided good
lows and a distinctive sense of freedom in
the mid range.
This David hose recording in 21 Channel
Sound illustrates an interesting departure. It
shows that a certain type of recording today
sounds almost the same on tape or disc. Some
difference is still discernible but it's far less
than usual. The reason isn't too hard to find.
With twenty -one microphones soaking up
sound at close range in an average recording
studio, the disc is somewhat at a disadvantage. In place of normal room sound, this recording makes heavy use of artificial reverberation. Since the strings cannot register
natural warmth in the high end under these
rather extreme circumstances, the disc manages to sound little better than the tape. As
for pinpointing the individual Instruments, it
seems that you can do a passable job without
the attributes of wide -range stereo if you use
twenty -one mikes to locate each sound source.
The record producer who is convinced that
all listeners suffer uniform deficiencies in
playback will always be tempted to substitute multi -channel techniques for conventional
stereo that sounds great on a really good
sound system.
The liner notes supplied with this recording
contain an amusing nugget that proves once
more how seldom the writers of such notes
actually- hear the releases they are talking
about. Despite the vast amount of artificial
reverberation that a child could spot, the
notes speak of an acoustically perfect hall
with a natural reverberation time of seven
seconds having been used for this session.
This tale really takes on the proportions of a
whopper when you consider that the best concert halls providing recording facilities today
rarely need more than two seconds acoustic
delay.
21
Marty Gold: The Music of Rodgers and
Hart
RCA Victor LSP 2535
Melachrino Strings: The Music of Rodgers
and Hammerstein
RCA Victor LSP 2513
If your record dealer is typical of his tribe,
much of his information about the sound on
today's stereo discs has been gleaned from
customers such as yourself. All too ninny
dealers still haven't the foggiest notion how
comedy honors with David Opatoshu and Maria Karnilova. The best lines are fielded beautifully by this capable trio but a top composer
would have given the singers equally challenging material.
good some of their current stock can sound
on the right equipment. In any ease, you'll
probably be doing your record merchant a
favor if you tell him to keep the number 2535
in mind the next time he gets a call for an
outstanding instrumental album capable of
showing off a full-fledged sound system. Considerable experiment went into Marty Gold's
album of Rodgers and Hart evergreens. Provided your stereo system can deliver the goods
without the aid of tricked -up sound on the
record, you'll find this one of the very first
recording sessions to capture soloists in close ups of astonishing quality without losing the
room ambience of bona fide stereo recordings.
Webster Hall acoustics and Marty Gold's inventive arrangements of some of the theatre's
very greatest tunes are an unbeatable combination. Competent woofers will greet with
particular relish the contra -bass clarinet of
Stan Webb in Dancing on the Ceiling and
There's a Small Hotel.
The Melachrino disc may appear a bit tame
its comparison despite the fact that it happens
to contain the best sounding collection of
Rodgers and Hammerstein classics currently
available. Everywhere you turn in this all
the top drawer show songs of the past two
decades are a balm to the ear. Dick Rodgers
has ample reason to be proud of his soaa, iu
these two albums.
.
Bravo Giovanni (Original Broadway Cast)
Columbia KOL 5800
If an elaborate plot and a lot of fast action
were the only requirements in a musical, this
show would be one of the big hits of the decade. Not that the Broadway debut vehicle of
opera star Cesare Slept is seriously lacking in
other ingredients that go into a good musical
comedy. The total assets of this story (played
at almost the tempo of a farce) add up to
enough material to put together several of the
slender -plot affairs we've had on Broadway
this season. After eleven years as top basso at
the Metropolitan, Cesare Siepi has earned the
right to expect a musical with a score as rich
as the one Ezio Pinza had when he first appeared on Broadway in "South Pacific." Instead, Siepi finds himself in it show that is
stronger in story line than it is In the caliber
of its music. I can't think of another voice or
personality available in the theatre today better qualified to be entrusted with a solid bundle of good songs that we used to take for
granted in musicals produced a decade ago.
"Bravo Giovanni" would he an adequate vehicle for a run of the mill singing lead. Under
the conditions we're considering, the music
just misses the mark.
This show is on strongest ground as it digs
its way, in more ways than one, into the restaurant business in present day- Rome. Cesare
Slept is introduced as the struggling proprietor of a modest trattoria about to be engulfed by a branch of a mass- production
chrome -plated restaurant chain. A novel by
Howard Shaw provided the germ of the ideas
that tumble forth in the book and lyrics of
A. J. Russell and Ronny Graham as Siepi anti
his neighboring shopkeepers proceed to wreak
their vengeance on the competing restaurant
chain. Graham's agile wit, first noticed on
Broadway when he served as composer, lyricist and sketch writer in "New Faces of
1952," points up every possibility for broad
comedy as the "Siepi Gang" tunnels its way
to the opposition kitchen and begins to divert
their featured dishes to its own unsuspecting
customers. The discovery, during the tunnel-
A Funny Thing Happened on the Way to
the Forum (Original Broadway Cast)
Capitol SWAO 1717
This musical comes to records with a reputation that has already identified it as the
season's second funniest show. "How to Succeed in Business," the top dog in humor this
season, has little to fear however so far as
the record audience is concerned. This Roman
romp starring Zero Mostel cannot claim equal
honors on records because so much of the new
show's humor lies in its visual gags and uncurbed horseplay. Authors Burt Shevelove and
Larry Gelbart based their farce on sure-fire
material similar to that used in Roman comedies some two thousand years ago. Shevelove,
while still at Yale, had made a pretty exhaustive study of the writings of Titus Mac cius Plautus (a name that could easily have
been at home in an old Fred Allen script).
For assistance in building a new show around
the ancient characters and plots of Plautus,
Shevelove called in Stephen Sondheim -supplier of lyrics to such famous shows as "West
Side Story" and "Gypsy." With veteran comedy director George Abbott at the helm, the
stage production offers a field day for Zero
Mostel in the juicy role of a conniving slave.
At the microphone, Mostel to able to convey
only a small fraction of the comedy talent
that swamps the stage whenever he's sagging
its beams. Not that the authors have not been
generous in the amount of material they've
given Zero. He appears in virtually every
number in the album with the exception of the
several attractive ballads scattered throughout the score. Even in the ballad department,
he manages to appear in the reprise of the
best tune In the show- Lorcly-sung in its
natural state by leading players, Brian Davies
and Preshy Marker. (The girl's name, incidentally, is not a typo, just the latest way to
shorten precious.) Mostel lends the company
in a stock "greeting and explanation" type
song as the show opens to the strains of
Comedy Tonight. The zany plot begins its tortuous path that finally ends in freedom for
Mostel when Davies and Zero raise their
voices in Free. David Burns, Zero, Jack (Alford and John Carradine contribute the most
diverting moments in the show album when
they take turns in the tandem lyrics of Everybody Ought to Have a Maid. This show may
be a rather trifling effort on records but the
score manages to dispense a higher percentage
of melody than you find these days in shows
that take themselves far more seriously.
Mantovani: American Waltzes
London Tope LPM 70051
Whenever four -track tapes move forward in
sound quality, a Mantovani reel is usually a
good indicator of their progress. No other orchestra leader active in recording studios today pushes leis string section in quite the way
Mantovani does. It's possible that some of the
"wiry" quality in his earlier quarter -track
reels could be traced to the playing style of
his strings as each man tried to hit full volume even in the upper registers. The style
hasn't changed in London's latest Mantovani
release yet the sound is definitely smoother.
About halfway through the second waltz, I
decided that memory alone shouldn't be asked
to determine that the sound here was better
than the earlier Mantovani reels. The only
way to clinch the point was to dig out a previous tape near the current end of the shelf.
AUDIO
8
AmericanRadioHistory.Com
AUGUST, 1962
Now there's no reason
why anyone can't own a Fisher!
Introducing the new Fisher KX -100 StrataKit...
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anyone can build and anyone can afford.
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There has never been anything like it. You invest $129.50 plus a few evenings of
highly entertaining work -and you are the owner of a Fisher amplifier rated at 50
watts stereo music power (IHFM Standard). Look again at the price and the power
output figure. They are not typographical errors. You don't have to look again at
the name. We know that you know what Fisher means.
But even if the KX -100 were not the most astonishing kit value of the stereo era,
it would be worth building just because it is a StrataKit. The StrataKit method of
kit construction is the exclusive Fisher development that enables a totally unskilled
and inexperienced person to achieve the same end result as a professional laboratory technician. You can't help ending up with a faultless Fisher product when
you build a StrataKit.
In addition to more watts per dollar than any other top -quality amplifier, the
KX -100 features all the standard control and switching facilities plus a few remarkable extras: A front -panel headphone jack with speaker silencing switch ...full tape
monitoring facilities with the famous Fisher Tape -Play System ...a High Filter
switch...and a revolutionary new circuit that permits direct connection of a center channel speaker without using an additional amplifier! Yes. All that for $129.50.*
Wa1nul o, mahogans
AUDIO
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In the Far West
Csport F,sher Radto International, Inc
AUGUST, 1962
.
FREE! $1.00 VALUE! Just published!
The Kit Builder's Manual: a new,
illustrated guide to high -fidelity
kit construction.
Fisher Radio Corporation
21- 2944th Drive
long Island City
1, N. Y.
Please send me
without charge
The Kit Builder's Manual, complete
with detailed information on all
Fisher StrataKits.
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9
AmericanRadioHistory.Com
GRADO
Going hack to an item released one year ago
(Italia Mia, 70045) was a distinct revelation.
The older reel immediately gave the impression that the playback head had been shoved
a few degrees out of alignaient during the
minute or two it took to change reels. All that
was needed to restore the sensation of an
aligned head was to return to this present
reel of unabashed sentiment in waltz time.
There are far more accurate ways to check
head alignment but this tape in a library containing any other Mantovani reel could put
you on the alert. Whenever the two reels
would begin to sound alike, you'd have ample
gested In the Verve Sound Tour of France.
No less an attraction is the engineering she
receives in her debut record. Unburdened with
ago in.
Someone hits decided to change the sound
of the Boston Pops on records and I can't say
the experiment is a wholly pleasing one. Ar-
warning to start
getting matters upright
Stanley Black: Spain
London Tape LPL 74016
London's latest batch of Phase 4 stereo
tapes goes in heavily- for the travel motif
noticeable on other labels this month. Proximity to the Continent may have little to do
with it but the reels devoted to Italy (Roger
Laredo Orchestra- London LPL 74014).
France (Maurice Larcange and his Accordions- London LPL 74013) and the European
-
cinema (flit Themes from Foreign Films
London LPL 74020) give tape collectors an
unusual opportunity to stock up on continental fare in one shopping trip. Of the entire
group, Stanley Black's excursion to Spain will
undoubtedly draw the most interest since his
reputation is the only established one in the
new crop of names. This saine reputation,
along with the position Black occupies on the
roster of London artists, may account for the
considerate treatment he receives at the hands
of the Phase 4 recording crew. Unlike the
lesser lights in this month's release, Black is
accorded some degree of cohesion in the overall sound of his orchestra. A moderate amount
of roll off in the treble will provide the proper
equalization on full range equipment as the
orchestra tackles such almost- Iberian favorites
as Valencia, Serilianas and Ay- .4y -,iy. An unexpected wrinkle in the interest of authenticity is the appearance of a Flamenco troupe
with its own separate repertory sandwiched
between the orchestral numbers. The twenty channel console mixer gets its best workout in
the famous "Ritual Fire Dance" by Manuel
De Falls as the mikes pick out scattered accents in the string section that would have
"Fantastic sound, equal to the
finest tape I have ever heard."
The new GRADO STEREO CARTRIDGES represent a major step
forward in bass depth and solidity, in mid range detail and in
high frequency sweetness and
smoothness. The complete lack of
shrillness and stridency is most
refreshing.
All GRADO cartridges are extremely rugged and not magnetically attractive. They are ideal
for record changers.
been
Gentleness to records and the
diamond stylus is proven by the
following fact:
Sound Tour: France
Verve V6 50000
Michele Arnaud: Paris in the Spring
Capitol ST 10317
if the record industry ha, :n: lime to say
in the matter, the dollar of the American
tourist isn't going to he any safer upon his
ONLY GRADO GUARANTEES ITS
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$39.50
lost in the concert hall.
return home. We've always had plenty of records designed specifically to induce travel to
far -off places. The latest trend in records attempts to tie in with the travel boom on n
before and after basis. Verve Records has
launched an ambitious series providing souvenirs in sound for those who've recently visited
France. Italy. Spain or Hawaii. Richard Joseph, Travel Editor of Esquire magazine, has
furnished a booklet for each
try that
covers far more than the usual album notes.
Underpinning each musical selection on the
record is a set of sound effects suggested by
the tune. The only dubious effect is the sound
of the pounding surf. It resembles the Jersey
shore fair more than it does it typical French
beach.
The ntiking setup for the small orchestra is
providing a separate mike
for virtually every instrument on the floor.
The trouble with the 12- channel control
boards such as the one used here seems to lie
in the fact that their owners cannot resist the
temptation to use every blessed channel when
recording only thirteen or fourteen instruments.
The Capitol album offers the American record debut of the young French songstress,
Michele Arnaud. Mlle. Arnaud belongs to the
school of Parisian vocalists that favors an
approach based on straightforward sophistication. Too young to rely on carefully developed mannerisms, Michele Arnaud offers a
better glimpse of the Paria that is only sugon the fussy side,
For further details write to:
GRADO LABORATORIES,
4614 7th Avenue
INC.
Brooklyn 20, New York
Export- Simontrice, 25 Warren St., N.Y.
C.
extra channels, the recording to content to
settle for a scrupulously clean account of
what a dewy -fresh voice can do to the proper
mike. The only thoroughly familiar item in
this collection is The Green Leaves of Summer -the least expected sound is the suggestion of bagpipes in a soot aah"at a ilighland
wedding Lea Cornemuses.
Pop Roundup
RCA Victor LSC 2595
thur Fiedler's Bostonians have always enjoyed
good reputation among audiophiles. Few
large orchestras specializing in light music
have done as notch as the Pops to champion
recording techniques that made outstanding
use of hall acoustics. During decades of recordings that go back to the Thirties (remember those 10 -inch 7R's with all the room
sound ?), the Boston Pops maintained a characteristic sound that instantly identified their
efforts. When stereo carte along. their sessions
in Boston's Symphony Hall became an even
more convincing proving ground for the virtues of big -hall sound. Some of their recent
albums (Viennese Nights, Music of Frank
Loesser, and Hearts in % Time) touch upon
nearly- everything that's been done to date in
getting a big hall into the act during it stereo
a
session.
Now along comes this collection of Western
tunes arranged by Richard Hayman and Jack
Mason and we find most of the regular Pops
recording theories abandoned in favor of studio practices that have become to dime a
dozen. Sections of the orchestra have been
provided with their own mikes and then isolated by means of screens. The envelope of air
that's been present in every Pops stereo recording since the Spring of '58 has been deflated to the minimum clearance of n typical
studio. The weight of the orchestra is still
there but the sound is now earthbound. Perhaps the most difficult readjustment in the
new setup comes during the solo passages.
The program of tunes featured is comprehensive enough to satisfy sagebrush fans of all
ages. Nine TV Westerns are represented in the
opening medley with remaining attention scatterd among older fare such as Coot Water.
Riders in the Sky and Horne on the Rang,.
Cavalcade of the American Band
Capitol SW 1688
The Goldman Band is the logical choice for
an album that attempts to outline the history
of band music in America. Founded in 1911
by composer -conductor Edwin Franko Goldman, no other civilian group still active today
can point to a comparable service record in
the band field. Richard Franko Goldman, son
of the founder, puts the band through its
paces in an unusual album that will be required listening wherever interest in the development of American band music extends
beyond the cursory. The early repertory of our
pioneer bands has been a subject of considerable study by Richard Goldman. Going back to
the American Revolution, he presents here a
scoring for brass instruments of the patriotic
hymn Chester by William Billings, probably
the nation's first hit song -so popular in its
day that it almost became a national anthem.
The Battle of Trenton and the Federal March
cover the rest of the 18th Century. Two
Quicksteps represent the 1830's, the earlier
example proving at fiendish challenge to cornet players 31e1 Bridles and James Burke.
Santa Ana's Retreat from Buena Vista,
Stephen Foster's only march, has the perky quality reminiscent of his minstrel tunes. The
Washington Greys, one of the oldest American
marches still in use, is the link to the Civil
N1'atr era. Two marches by Victor Herbert and
a polonaise by John Philip Sousa reveal new
facets of familiar figures. The collection is
brought up to date with Meacham's American
Patrol and Morton Gould's American Salute.
Capitol's sound fits in admirably with the intent of the collection, offering a uniformly
uncolored sheet of glass through which tea
view the old documents in this showcase.
.
AUDIO
10
AmericanRadioHistory.Com
AUGUST, 1962
What does
A chance
a
nickel buy today?
to learn about the
newest developments in loud-
speakers, speaker systems,
P.A. systems & microphones!
UNIVERSITY catalogs are unique.
Each one is a complete and indispensable guide in its field, offering
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v
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A
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AUDIO ETC.
Edward Tatnall Canby
1.
100 -MILE STEREO
Life in hi fi is dreadfully integrated
these days. At long last, after integrating
about 19 different factors, I was recently
able to achieve a long -anticipated goal.
I listened to a perfect stereo broadcast
at
100 miles.
First, there was my antenna. As previously reported, my rooftop rotating system began acting zanily last winter, receiving front the side and all that. It ended
up later completely disconnected. The
man went up to remove some of the accumulated frozen slush and the clear ice
a foot thick that had formed around the
edge of the roof and managed inadvertently to shovel the lead -in off. It was imbedded in the ice. Wasn't until a warm
spring day that I got up on the roof and
reconnected the 300 -ohm ladder -type plastic
lead. But still the old signal strength was
missing. Something was tired.
Somebody said I needed a new lead in.
Plastic coated 300 -ohm leads, I was told,
don't stand up very long to outside weathering. Mine, I'll admit, looked pretty sad
the plastic was stretched and cracked, the
spacing between the wires had narrowed
(throwing off impedance values) and maybe
the ultra -violet oxidation -by-weathering
had added more unintended loss. Alas, I
was busier than all get-out, so this job had
to await my summer assistant, who is a
whiz at getting things like that done pronto.
Theft there was the little matter of the
stereo tuner. As also reported, 'way back,
I had figured on trading my Citation III
for a stereo IIIX, pre -wired, and was
awaiting same. Well, I finally got it -just
in time to run into the winter's antenna
difficulties. It was sensitive enough, however, to bring in the few stereo outlets
within my range
could hear WQXR in
New York and WTFM at Lake Success
(all- stereo) though with plenty of background noise. The stereo was thus not
exactly pleasing. I found the relative silence of mono reception a relief, though the
IIIX did show me one thing, that the
quality of the fringe -area background
noise on stereo differs from tuner to tuner.
The Citation produces a plain white-noise
hiss, not essentially different from the normal mono interstation hiss.
Then I returned the Citation for tuning
adjustment, just to make sure it was in
optimum condition. (As usual, I didn't
want to get my fingers in where they
shouldn't be. That took logistics. Things
like big cardboard cartons full of inexplicable cardboard inserts that are supposed
to fit in and around the set but never doafter the first unpacking. Necessary, of
course, but an infernal headache to the
man who ships his hi fi back "in the original
carton!" I prefer old newspapers but generally make a brave attempt to figure out
the inserts, on the theory that they are
ideally better... .
-
-I
So, ninny a moon later, back comes the
my car
and out to the country again. Alas, somebody must have joggled it in transit, probably the expressman who dropped it five or
IIIX froze the factory and into
six feet onto his truck's flooring or, just
maybe, me. So this time I figured we'd better adjust it ourselves, and my summer assistant got out his tools and did so in a
jiffy. It takes only a moment-so I was in
business.
Except for the antenna. It was hooked
up, yet clearly not producing the signal it
should. So, the weather being just wonderful, my assistant hopped up on the roof
hauling the ladder after him; laid the
antenna down on its side and re -wired the
works, replacing the old ladder -type 300ohm lead with a handy hank of the solid
solid variety we happened to have at hand.
Since the original installation had been
led to the wrong part of the house-and
extended, rather than rewired, we now
took a shorter, more vertical path in to
the tuner.
Well-that did it. Integration was complete, antenna, lead -in, and tuner, all in
prime operating condition. And so when
I tuned towards New York WQXR 100
miles away, the IIIX level meter shot up
to maximum, 111 on its dial, and stereo
boomed through with negligible background
noise. Even the weaker signal of WTFM
came through nicely in stereo, though my
musical ear generally gets tired of the fare
available on that station before very long.
Just to clinch the deal, I recorded a good
piece of "Tristan and Isolde" in stereo on
the Eico 4-track recorder (recently noted
in our EQUIPMENT PROFILE). Thus I made
my first tape of a stereo broadcast. On
playing it back the next day, I was aware
that it could be identified as a broadcast,
rather than a direct copy of a recording,
by the slight background noise, occasionally increasing, and once in awhile a
whisb-whish.
A test I've not been able to make yet is
to record stereo off the air at 100 miles,
then AB the tape with the original record
out of my files played via the saute audio.
I'll have to monitor a broadcast that I
can duplicate among my own records, and
that may take a bit of waiting. My expectation is that on direct AB the combination of stereo transmission at the station, 100 miles of space and a record -and
playback operation out of my timer should
add up to some deterioration. I suspect,
too, that the stereo itself may turn out to
have been somewhat modified in the process- watered down is a good enough term.
I thought I noticed a bit of instability
and a general lack of impact in the stereo
image as I did my 100 -mile listening, but
this needs to await further experience, for
confirmation.
After all, you're not supposed to listen
to multiplex stereo at 100 miles.
I am indebted to L. F. B. Carini's ex-
cellent little booklet on FM antennas,
"Theme and Variations,"" for a neat summing-up of the life expectancy-replace
every 20 months -and the losses expected
from the various types of lead -in line. Because of loss cross -wise through the plastic
separating material, increased by age, the
best type is the fancy open -wire arrangement, but it is the least practical for most
of us. The ladder -style plastic is the best
ready -made type, followed by the clear
flat ribbon -but this is not for outdoor
use. Then comes the hollow tubular air core ribbon and the similar oval type, not
commonly seen, and then the flat brown
ribbon for outdoors. The open wire type
gives 0.3 db insertion loss per 101) ft.,
the perforated 0.7 (ladder type), the flat
brown ribbon 1.6 in dry condition and 7.3
db when wet. A lot.
I think maybe I'll replace my flat brown
ribbon with the ladder type before next
winter sets in.
2. STRAVINSKY
ON STEREO
Igor Stravinsky- is 80 this year. Suddenly, he's the grand old man of music,
though to many of us more esoteric souls
he has been a composer to reckon with for
most of our lives.
My first Stravinsky recording, Hatch, was
somebody's version of "Fire Bird "; but
the next and the next were pretty esoteric:
the original Stravinsky 78 -rpm recordings
for European Columbia of the "Octet" and
the "Symphony of Psalms" -made in the
very earl- Thirties, with the ultra -dead
acoustics that were then the normal rule
for such recordings. I've had many dozens
since.
Stravinsky has kept himself remarkably
up to date. His musical aesthetics are positive, original and very seldom in line with
the standard elichc s about art and music
we hear so often. His interests, similarly,
tend to be unorthodox according to the
popular conception of a composer. He has
no long hair, of course; but then, few composers have, since the turn of the century.
(Rachmaninoff introduced the crew cut
to the company- of great composers.) But
there's more than mere hair involved.
For instance, most musicians and many
composers take a fashionable musical point
of view towards the low -brow but necessary
business of recording: they make their
living off it, sometimes, get their publicity
through it, but they do not admit it through
the front door into their proper musical society. The real thing-live music
so
very much better.
That is a remark that always annoys me
by its sheer irrelevancy. So are fresh beans.
But, come December, frozen beans are quite
a blessing and, if you ask me, I'd rather eat
frozen peas than shuck fresh ones. More
important, they taste better most of the
time, too.
Of course "live" music is "better" than
recorded, in many senses! So what. Most of
us do not maintain house orchestras and
resident string quartets, not to speak of
opera companies, in our modest hontes. Few
of us are able to "play our own." And in
any ease, recorded music has its oven values,
purely musical, that complement those of
live music. A great deal of music is, in practice, far better realized on records than in
the concert hall -for which it may not have
ever been intended.
-is
" Apparatus
Development
Wethersfield 9, Conn.
AUDIO
12
AmericanRadioHistory.Com
Co..
AUGUST, 1962
Uncompromising engineering + moderate price = best buy
New Eico Stereo FM Multiplex Tuner ST 97
Semi -Kit
$99.95
BUILDING THE BEMI -KIT:
critical sections, the front end artd 4
IF's through to the detector, are entirely pre -wired
and pre -aligned for best performance on weak signals (fringe area reception).
The two most
third most critical section, the heart of the
stereo demodulator, you simply mount and solder the
components on a high quality circuit board. Pre aligned coils eliminate all adjustments. The res: is
non -critical and easily accomplished with the clearest
pictorial drawings and most thorough -going step bystep procedure in the industry.
For the
THE CIRCUIT
the front end Consistent and reliable printed circuit. Ultra-sensitive, stable, and low- noise. Wide -band
design. Rugged plated steel housing for protection
and shielding. Meets FCC radiation requirements.
Precise temperature -compensation for freedom from
drift without AFC. AFC provided with defeat for convenience. Indirect gear drive is backlash -free and
eliminates possibility of microphony.
the IF strip
Four IF amplifier- limiter stages (all that
will do any good) and an ultra- wide -band ratio detector, all pre -wired and pre -aligned. Designed with the
utmost practicality so that the simplest alignment
is also the alignment for highest sensitivity and pactically lowest distortion. (Important to you if a service alignment is ever required.) Output is flat to the
limit of the composite stereo signal frequency spectrum to eliminate any need for roll -off compensation
in the stereo demodulator.
Ten stages for unequalled
performance capabilities. EICO's brilliantly -engineered zero phase- shift, filterless detection circuit
the stereo demodulator
rf_.a._
.
-r.
'f
Amplifier ST70
Kit: $99.95 Wired: $149.95
Includes Metal Cover
40 -Watt Integrated Stereo
Amplifier ST40
Kit: $79.95 Wired: $129.95
Includes Metal Cover
Over 2 MILLION EICO Instruments in use.
Most EICO Dealers offer budget terms.
THE OPERATION
a line: one, a station frequency dial with the famous EICO "eye- tronic "B
tuning -eye travelling along it to indicate the exact
center of each broadcast channel; the other a logging dial with an automatic stereo indicator lamp
travelling along it in tandem with the tuning -eye to
indicate when the station tuned in is broadcasting
stereo.
Two slide -rule dials in
THE LOOK
Massive extruded aluminum panel and side rails, exquisitely brushed and anodized pale gold, with baked
epoxy brown, perforated steel cover.
PERFORM A NICE
field tests brought back the report
a fringe -area stereo tuner," which is
simply the meaning of our laboratory measurements.
We know, for example, that full limiting is achieved
at lOuV input signal, meaning that the low distortion
and noise specifications (the full benefits of FM)
will apply to all but the most distant and difficult -toreceive stations. The sharp selectivity you need when
a tuner is that sensitive is here also (a strong local
station and a low -power station 100 miles distant
separated by only 0.4 mc, each had its own sharp
tuning -in point on the dial). While signal levels as
low as 2.5uV will produce phase -locking for full
stereo separation, very strong local signals will proPre -production
"Definitely
AND FET
duce no higher output from the FM detector than a
lOuV signal and will not be degraded in quality by
overloading the stereo demodulator. Distortion is
very low, both in mono and stereo, so that the sound
you hear has that sweetness, clarity, and freedom
from grating harshness that results from absence of
distortion. The stereo output signals are so clean
that there is not a sign of the 19kc pilot carrier or
the re- inserted 38kc sub -carrier visible on a scope
presentation.
SPECIFICATIONS
Antenna Input: 300 ohms balanced. IHFM Usable Sensitivity: 3uV (30db quieting), 1.5uV for 20db quieting. Sensitivity for phase -locking (synchronization) in
stereo: 2.5 uV. Full limiting sensitivity: lOuV. IF
Bandwidth: 280kc at 6db points. Ratio Detector Bandwidth: 1 megacycle peak -to -peak separation. Audio
Bandwidth at FM Detector: Flat to 53kc discounting
pre -emphasis. IHFM Signal -to -Noise Ratio: -55db.
IHFM Harmonic Distortion: 0.6 %. Stereo Harmonic
Distortion: less than 1.5%. IHFM IM Distortion:
0.1 %. Output Audio Frequency Response: ±ldb
20cps -15kc. IHFM Capture Ratio: 3db. Channel Separation: 30db. Audio Output: 0.8 volt. Output Impedance: low impedance cathode followers. Controls:
Power, Separation, FM Tuning, Stereo -Mono, AFC Defeat. Tubes: 1- ECC85, 5-6AU6, 1-6AL5, 1-12AT7,
2-12AU7, l -6D10 (triple triode), 1 -DM70 (tuning -eye),
6 signal diodes, 1 neon lamp.
1 -EZ80 rectifier,
Power Source: 117V, 60cps; 60 watts drain; extractor post fuse. Size (HWD): 51/4" x 157/e" x 113/4".
Weight 17 lbs.
*Actual distortion meter reading of derived left or
right channel output with a stereo FM signal fed
to the antenna Input terminals.
EICO, 3300 N. Blvd., L.I.C. 1, N.Y. A-8
Send free 32 -page catalog &
dealer's name.
Transistorized
Stereo /Mono
4-Track
----
FM -AM Stereo Tuner ST96
Kit: $89.95 Wired: $129.95
Includes Metal Cover and FET
FM Multiplex
Autodaptor
MX99 (Patent
Pending)
Kit: $39.95
Wired: $64.95
Cover Optional $2.95
e.
' ^.
"'
-,.
Listen to the EICO Hour, WABC-FM, N. Y. 95.5 MC, Mon.-Fri., 7:15-8 P.M.
AUDIO
Includes Metal Cover
(patents pending) eliminates loss of separation due
to phase -shift in the stereo sub -channel before recovery. Complete rejection of storecasting interference. Cathode follower driven, sharp cut -off 15kc low
pass filters in each output channel.
:
í
70 -Watt Integrated Stereo
Wired $149.95
Send new 36 -page Guidebook to
HI-FI for which I enclose 250 for
postage & handling.
.
Tape Deck RP100
=i=
(Patents Pending)
Semikit: $299.95
Wired: $399.95
Name
Rack Mount $9.95.95
Address
.1-
City
01962
EICO
.5
at
_Zone
State
Electronic Instrument Co., Inc.
3300 Northern Boulevard, L. I. C. 1, N. Y.
Export Dept., Roburn Agencies Inc., 431 Greenwich St., New York 13, N. Y.
AUGUST, 1962
13
AmericanRadioHistory.Com
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FINCÓ
THE FINNEY COMPANY
Dept. A
34 W. Interstate Road Bedford, Ohio
This ability of the phonograph listener
stereo effect, placing instruments near and
and famous composer.
Stravinsky likes recording. He even likes
stereo. Not only that, he can talk about it
analytically. A while back, Columbia Records sent out a press release on him quoting,
in turn, Stravinsky's remarks in a Record
Supplement of the New York Times. How
does "live" music compare with stereo'
Here is his answer. Instead of the usual
stereotypes about how much better live
music is, he has this to say:
"Whereas the angle formed by a live
orchestra and our two ears is about six
inches, the angle at which the stereo microphone hears the same orchestra for us is
sometimes as great as sixty feet." (Well,
maybe there are other ways to put it, but
this gets the idea over.) "We do not hear
live performances 'stereophonically', therefore, and stereo, instead of giving us the
best seat in the house' gives us, in fact, a
kind of omnipresent seat not found in any
house. Nor is it a seat in the orchestra ;
for an orchestra doesn't sound 'stereophonic.' to itself.
"I do not say this to condemn stereo,
however, but only to question the meaning
of 'high fidelity', fidelity to what? If, as I
say, the audition offered by stereo is, in
any sense, unreal, it can be in another sense
ideal and it is an idealization with important consequences. For one thing, it is a
challenge to concert halls, though most
concert halls are too bad to be worth challenging and since most concert halls are not
ideal, or even good, I do not see why we
should try to be 'real' or 'faithful' to them
or why, in fact, we should not accept the
stereophonic 'ideal'."
Take that from an old man! And this,
mind you, was written only a few months
after stereo was introduced on disc records.
How many of your engineer friends were
going along with stereo that soon?
Stravinsky went on, in this report, to
talk about stereo separation in a novel way.
Wagner, he pointed out, was mainly interested in a directional concentration of
his huge orchestral sound, a minimum of
separation -he was working for the very
opposite of our stereo spread. (But stereo
spread is only a part of the stereo effect,
of course; the sense of "presence," the
spatial feeling, the wall -bounce of the reverberation, are things that Wagner took
for granted in his "live" music.)
On the other hand, Stravinsky points
out, much music of a contrapuntal nature
can benefit by the stereo spreading -out.
(He says stereo has "no very serious ill
effects" on such music, though Columbia
unfortunately made a typo and had it "so
very serious ").
And with stereophony, he observes, we
are also able to hear the true effect of many
kinds of "live" spatial music which before
could only be heard in very particular
places. I can think of dozens of works which
are more or less unsuitable for concert performances and yet turn out to be highly
suitable for stereo. The backbone of good
stereo material, in the classical area, is
indeed found in such music.
Stereophony has already influenced
existing music, says Stravinsky, in a superficial way "by a built -in exploitation of the
sound is very difficult for them to achieve.
Unfortunate but necessary, some recording
engineers will say.
As for separation, he observes very
rightly that any "purely harmonic orchestral body " -i.e., one depending on the blend
into a single sound -"will suffer from too
much focus on its individual parts." Then,
he hits upon one of the biggest faults of
much classical stereo. Too much separation,
de- blending of instrumental sounds that
were intended to fuse together, and do
fuse together in the concert hall. The recording directors can play havoc with musical sense in this fashion, even though the
outward sound may be stereophonically gorgeous. The art of recording in stereo, thus,
is a more critical art than ever, depending
crucially upon the musical judgment of
those in charge of setting up the hall and
the mikes within it.
Stravinsky, back when stereo was new,
had the perception to write clearly on this
subject. "In principle, of course, stereophonic recording should be able to fuse
and achieve super -clear balances." (It can
and does today, after four years of disc
experience.) "Its practice, however, we too
often feel as though we were being made
to follow the equivalent of "Arrow" scores
to ,jump to the violins on their entrance,
or follow a huge spotlight towards the trombones on theirs." The ping -pong effect, still
very popular but now less evident in good
classical stereo recording than in the early
stereo period.
Stravinsky closes on a pleasant note of
optimism. "With all my cautions about
stereo, however, I expect that when I am
accustomed to it, to its much greater volume
and dynamic range, to its really remarkable
ability to clarify orchestral doublings (that
should have been left in the dark), to its
ability to create the distance between a
close instrument and a far -away instrument, I know I will soon be unable to listen to anything else."
I'm sure he hasn't, since.
I can clarify some of the above, perhaps.
The "arrow scores" are standard minature
scores overprinted with huge black arrows
that point to the things you are supposed
to listen for -often in an arbitrary and unmusical fashion, oversimplifying. (Still
useful for score readers who "can't find
the theme" in the welter of notes all over
the page.)
As to "much greater volume and dynamic
rango" in stereo, I suspect that this was
more apparent than real, i.e., Stravinsky
heard it in the actual listening to stereo
playback ; his was not an engineering
analysis and comparison, stereo versus
mono. (He probably heard tape in the
Columbia studios, anyhow.) However, if I
am right, the maximum output from a
stereo disc should be somewhat greater than
that of an equivalent mono disc. (Not the
same record played mono, merely removing
the vertical response.) Groove geometry
says so, anyhow, though perhaps recording
engineers would suggest that considerations
of stylus motion, tracking and compliance
to "look in" imaginatively on all sorts of far, on this side and that, so that one turns
unlikely scenes, on widely varied musical ono's head to follow them." But, Stravinsky
surroundings, the ease with which the can feels, a more profound influence will come
acconwdate to anything from an intimate "when composers see that in new music they
solo recital to a grsuml symphony from his have to construct "au independently inliving room chair, counts for a great deal teresting middle dimension ". In other
in our present music listening. But I could words, compose directly for the stereo
go on and on in this sort of defence. What space, rather than for the concert hall.
I began to say was, Stravinsky has novel
Stravinsky isn't happy about stereo reideas on the most unexpected subjects, in- cording techniques that separate the mucluding this. Novel, that is, from an elderly sicians so that, in the playing, an ensemble
-
(Continued on page 89)
AUDIO
14
AmericanRadioHistory.Com
AUGUST, 1962
Let's listen in to a wonderful FM stereo!
32 (16/16) watts
AM /FM Multiplex Tuner Amplifier
SM -G
A new stereo amplifier that assures maximum performance in an FM multiplex stereo
of wonderful tone quality
that's Pioneer's
SM -G 205!
205
Specifications
-
Tuning Range:
IF Band Width: MW Soft ± 2.5kc,
FM ± 100kc
Maximum Sensitivity:
The SM -G 205 has both AM circuit and FM
multiplex circuit for FM and FM stereo. The
FM MPX tuner guarantees precise channel separation and perfect stereo reception, stabilized
through the use of AFC. The phase reversion
circuit produces stable and distortion -free outLoudness control and
put as high as 32W.
high and low filters provide stereophonic reproduction of natural tone quality. And, the
SM -G 205 is capable of reproducing a variety
of program sources, including FM stereo, stereo
all with the same
discs, and stereo tapes
dynamic and rich tonal quality. The smartly
modern design and clear -cut dial lines are sure
to satisfy the most discriminating taste.
(1,1)
Hifi
± 8kc
MW 19uV (at 1Mc, 500mW
output; 30% modulation)
FM lOuV (at 95Mc; 500mW
output; SiN 30db; 30%
modulation)
Inputs and Gain: MAG PU 2.5mV (For obtaining
output at lkc)
MTAL PU 28mV (For obtaining
11W output at lkc)
Tape (play) 165mV (For obtaining 11W output at lkc)
AUX 165mV (For obtaining 11W
output at lkc
11W
Output Terminal:
-
1
MW 535 to 1,605kc
FM
88 to 108Mc
8
or 16 ohm for speaker (each
channel)
Maximum Output: 16W x
2
Frequency Response: 20 cps 5kc = 1db
Outside Dimensions: 18'.;"(W) x 13' -.'(D) x 51/2(H)
PiONIER
P1 ONEER ELECTRON] C C ORPORATI ON
5 Otowacho 6- chome, Bunkyo-ku, Tokyo, Japan
Distributors:
AUDIO
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Canada IMPORTHOUSE OF CANADA 2939 Eglington Ave. E., Scarboro, Ont.
HWEE SENG & COMPANY 259 Beach Road, Singapore
Singapore & Malaya
AUGUST, 1962
-
15
AmericanRadioHistory.Com
f
EDITOR'S REVIEW
PLUG -IN TAPE HEADS
Anywhy, it is an idea that we would like in a machine
for our own ii
IN THiS I)\i of rapid iitcrehangeability being built
into a wide variety of consumer products, it occurs
to us that the same sort of feature could easily be
provided with tape recorders. By now, the plug -in
feature of record -playing equipment has become standard with every type of phonograph except the $9.95
"hi -fi" models, and even in these it is usually possible
to change the stylus. Actually, the only part of a
phonograph pickup to wear out is the stylus itself,
barring some accident which breaks or bends beyond
repair the stylus- carrying element. So common is the
expectation of being able to buy a replacement stylus
that practically any price listing showing cartridges
is followed by the line, "Replacement styli, $x.xx,"
or possibly, "$xx.xx."
Considering for a moment the difference between
the wear on a stylus and that on a recording head, we
come to an entirely different problem, and one for
which no simple replacement "stylus" is offered that.
would bring performance back to that of a completely
new instrument. Yet tape heads do wear, and as they
do their high- frequency performance becomes poorer
in most instances -snore in some designs than in
others. While the user can replace heads if he is physically competent enough, it still requires some rather
intricate fumbling to make the change and it requires
rather delicate soldering to get the usually fine leads
properly in place on the new head without melting
the insulation or even softening the head encapsulation. All of this could be eliminated if heads could be
plugged in and out readily, with a well- designed
mounting which would ensure accurate azimuth alignment. Since alignment must be done in any case when
a head is replaced, it should present no hardship if
alignment were also required every time a plug -in
head were changed.
Even this would not be necessary if a complete head
assembly- containing two to three heads as the case
might be-were to be made to match up to a specific
fixed point of registry on the recorder chassis. Once
the heads were aligned on the individual mounting,
the assembly could be changed at will without the
need for further alignment. One other advantage of
this arrangement appears to be that it would then be
possible for the user to have say, two or three head
assemblies-one for four -track tapes, one for two tracks, and possibly one for full -track use. Most of
us have occasion to record or reproduce both two- and
four -track stereo tapes occasionally and such an arrangement would be a real windfall. As it is now, a
four -track head will not give optimum performance
with a two -track stereo tape; even though it may be
possible to adjust the balance control to obtain approximately equal levels from the two channels, there
is likely to be a difference in the signal -to -noise ratio
on the two.
It is possible that there are good economic reasons
why this idea is not practical, but it has been our
experience that there is always a market for an improvement, even though it does cost a few dollars.
FM- STEREO FILTERS
Some readers have commented on the problems involved in recording FM- stereo broadcasts as a result
of the presence in the tuner output of some 38- and/or
76-ke. Some months ago there was a newspaper report
of one recordist who charged that radio stations were
introducing spurious frequencies for the purpose of
preventing the recording of their programs, but nothing more has been heard of it. Probably inaccurately
reported, the named station indicated-according to
the article -that it was experimenting with the idea.
It is much more likely that it was a stereo broadcast,
with the attendant 38 -ke switching frequency appearing in the output.
It should be well known by now that the bias/erase
oscillator in most non- or semi -professional tape recorders operates in the range of 70 to 80 ke, and the
actual bias current in the head is comparatively high,
so the presence of even a small amount of 76 -kc in the
signal being recorded will mix with the bias frequency
giving the usual difference frequency of -in the typical bias -frequency- range -of 4000 to 6000 cps, and
this appears in the playback as a continuing squeal
whicli does act as an effective deterrent. What, if any,
is the solution ? Whose responsibility is it?
Some feel that the responsibility is that of the tuner
manufacturer. From the audio standpoint, the 38- or
76 -kc component does no damage whatever, and furthermore, it is usually at least 40 db down from the
signal. It causes trouble only when the signal is recorded on a machine in which the bias frequency is
close to 76 ke. We feel, therefore, that it is not the
responsibility of the tuner manufacturer since he provides equipment which does what is intended of it.
As we see it, the problem is up to the recorder manufacturer, and since it is relatively simple of solution,
it would seem as though every recorder should be
"FM- stereo proof." All that is necessary is to change
the bias frequency to, say, 88 kc. This would make
the major resultant signal 12,000 cps, which is not
very likely to cause trouble. True, the fifth harmonic
of 19 ke is 95, but very little 95 -kc signal should be
present iii the tuner output, if any. There may be a
little difficulty in raising the bias frequency in existing recorders, but a slight change in design could
make it possible in future production.
The cure for anyone who now has a recorder which
gives trouble lies in one of two methods-either increase the bias frequency so that it is in the range
from 88 to 90 kc, or else introduce a low -pass filter
between the tuner output and the recorder input.
Since the highest frequency one is likely desirous of
recording is 20,000 cps and the offending frequency is
38 ke, the filter should be relatively simple. In most
instances a capacitor across the tuner output should
suffice. Its value should be such that its reactance
equals the impedance of the tuner output at about
20,000 cps. Try it out if you have this sort of a problem in recording stereo broadcasts.
AUDIO
16
AmericanRadioHistory.Com
AUGUST, 1962
A CARTRIDGE DESIGNED ESPECIALLY
FOR AUTOMATIC TURNTABLES!
The Pickering Model U38 /AT is
a cartridge designed especially for
the new generation of automatic
turntables. A true STANTON Stereo
Fluxvalve, it combines excellent
hum shielding with high output for
unequalled signal -to -noise ratio.
A
High compliance is provided for
the special turntable features
while preserving the ruggedness
demanded by automatic operation.
Improved frequency response and
lower inductance make the new
Pickering U38/AT a truly universal
cartridge to match the universal
features of the automatic turntable.
NEW KIND OF CARTRIDGE FOR A TOTALLY NEW REQUIREMENT!
GARRARD MODEL A
TECHNICANA: PICKERING
GARRARD MODEL
qCRD
Model U38 /AT is a
STANTON Stereo Fluxvalve with a white
body and black V -GUARD stylus assembly.
Weight is 14 grams; Mounting centers: 7/16"
to 1/2". Supplied with universal mounting
hardware. $46.50 AUDIOPHILE NET
AIR
oN
RESPONSE:
±
2
db from 20 to 20,000
cycles.
DUA1i
LOO
CHANNEL SEPARATION: 35 db
OUTPUT: 10 my each channel
TRACKING FORCE: 2 to 5 grams
IMPEDANCE: 47,000 to 100,000 ohms
SHIELDING: Complete mu -metal
CUSTOM
... AND
ANY OTHEi .AUTOMATIC
TURNTABLE EVER
-
F
O R
T
H
O
S
"0
E
BE MADE!
W
H
O
C
A
N
I f
I
(
I
t
E
PICKERING & COMPANY, INC.,
H
E
D
I
F
F
E
R
E
N C
E
"
Plainview, N. Y.
The hermetically sealed STANTON Stereo Fluxvalve is warranted for a lifetime and is covered under the following patents: U.S. Patent No. 2,917,590;
Great Britain No. 783,372; Commonwealth of Canada No. 605,673; Japan No. 261,203; and other patents are pending throughout the world.
AUDIO
17
AUGUST, 1962
AmericanRadioHistory.Com
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AUDIO
18
AmericanRadioHistory.Com
AUGUST, 1962
Transistorized FM Front Ends
C. R. GRAY and T. C. LAWSON
Development of transistorized FM tuners involves a whole new series of considerations no less complex than with vacuum tubes, but of entirely different types.
Performance and reliability depend on the successful solution to all of the problems.
PRODUCTION
PR
of high- frequeoi
transistors on automatic lines
is
NASS
now making it possible to design
FM tuners for the consumer market at
"consumer prices." This article discusses
various transistor front ends used in I- \I
tuners.
The term "front end" as used here refers to that portion of a tuner between
the antenna and the first i.f. amplifier.
This includes, where used, the r.f. amplifier and oscillator -mixer or converter.
Much of the literature has referred to
this part of the receiver as a tuner.
However, the term tuner is often applied
to the complete front end and i.f. amplifier, including the discriminator. For
this reason, the term "front end" shall
be used throughout this article.
The different types of configurations
used in transistorized FM front ends are
discussed along with the performance
of each type. Also the influence that
the choice of transistors has over the
type of configuration used is discussed.
Individual -stage circuit design considerations are also given.
60
z
matched- neutral-
z
á
2.
power gain
ized
vs. center frequency.
u
30
YT}
e
2
-
20
(A) is a three- transistor configuration
using an r.f. amplifier, oscillator, and
mixer; (B) is a two- transistor configuration using an r.f. amplifier and a single
transistor as a converter; (C) is a onetransistor front end using only a converter. In the latter circuit, the r.f.
amplifier has been eliminated and this
configuration may consist of either a
12
3
db/OCTAVE
6 db/OCTAVE
.
-,
-.A.4
r
t
t
.
GERMANIUM
1
MIXE
o
Fig.
..
1
.
1000
3.
I
o.
b
Transistor noise figure vs. frequency.
single- transistor converter or a twotransistor oscillator -mixer combination.
Before evaluating the basic configuration, some thought must be given to the
choice of transistors used and also to the
performance desired.
Choice of Transistors
Transistors are available today whose
gain and noise figure are comparable
to the best tubes. Transistors such as the
2N1742 and the T2028 are intended for
the best hi -fi applications.
Not only is proper circuit design
necessary for good performance in an
h'M receiver, but the transistors must
be in keeping with the desired performance and cost. In choosing a transistor
for the r.f. amplifier, one important consideration is power gain. Since transistors are relatively low- impedance devices, power gain rather than voltage
gain is important.
C2
TO MIXER
OR
TRANSISTORS
CONVERTER
CONVERTER
Fi.-
CI
Fig.
Fig. 1. Basic transistor FM
4.
Common -
emitter r.f. amplifier.
TRANSISTOR
CONVERTE!?
ANT.
1----41.-
front -end con-
TO AGC
figurations.
AUDIO
. .
100
C3
1
.
TYPICAL
CENTER FREQUENCY IN MEGACYCLES
LOG FREQUENCY
Icv
.
.
10
2
AMP
-I_-
liii
o
4
F.
MAXIMUM
MINIMUM
3 TRANSISTORS
R.
....
IO
6
2
}'
11
`Philco Corporation, Ltnsdale Division
OSC.
.
-
.
}
ï-'
.
.
Typical
Fig.
Figure 1 shows some of the basic
configurations of an FM front end:
R.F.
AMP
\\`
1
Basic Configurations
11/
,
{
50
C
19
AUGUST, 1962
AmericanRadioHistory.Com
r
unit capable of at least
1 mw is suffi-
cient.
30
Circuit Considerations
20
Before beginning consideration of the
individual stages of a front end, a few
Z
general items must be considered. The
Fig.
Typical
5.
z
supply voltage must not exceed the maxmatched-neutral
á 0
0
ized power gain
imum ratings of the transistors and yet
vs. collector -emitnot be too low to affect the performance.
-10
ter voltage.
a.
A 12 -volt supply is generally considered
adequate.
20
The r.f. amplifier may be either a
grounded -base or grounded -emitter con-30
figuration. At the FM frequencies, feed-1
-2
-3
-4
-5
-7
-8
-6
-9
-10
back which is inherent in the transistor
COLLECTOR VOLTAGE, VCE IN VOLTS
is degenerative in the common-emitter
connection and regenerative in the common -base connection. In a neutralized
amplifier, the power gain will be identical in both connections. In an unneutralized amplifier more gain may be
obtained from the common -base connection at some sacrifice in stability. When
using a high -gain unit such as the
2N1742, sufficient gain may be obtained
from the common -emitter connection. A
unit with less gain, such as the 2N1745,
may best be used in the common -base
connection. Both of these connections
have advantages and disadvantages. It
has already been stated that more power
gain can be obtained from an unneutralized common -base connection; however,
the presence of regeneration causes a
greater variation of power gain and
bandwidth from transistor to transistor.
Degeneration in the unneutralized comFig. 6. Schematic of typical mixer and oscillator.
mon- emitter connection gives much betthis curve will be useful. Noise figure of ter interchangeability. Best interchangethe 2N1742 starts to increase at about ability is obtained from a neutralized
common- emitter amplifier.
100 mc.
Figure 4 is a circuit of a neutralized
Conversion gain and noise figure are
common- emitter amplifier. C, and C. are
important parameters in a transistor matching
to match the input
for the converter or mixer stage. Noise s.nd outputcapacitors,
resistance of the transistor.
figure, however, is not as important here Impedance
information is given by most
as in the r.f. stage, although if it is ex- semiconductor manufacturers
in the form
cessively high, it can degrade the front - of short- circuit measurements for variend performance.
Fig. 7. A.f.c. characteristics -oscillator
ous frequencies and operating points.
The oscillator transistor must provide These values will be the same for a
sh.ft vs. base voltage for two values of
feedback capacitance.
suitable output power at the FM- oscil- neutralized amplifier and will vary
Figure 2 shows how the unilateralized lator frequency for good mixer gain. A slightly in the unneutralized ease, howpower gain of most transistors varies
with frequency. It can be seen that the
power gain at any frequency can be
determined if the power gain at another
frequency can be determined if the
power gain at another frequency is
known since the slope of the curve in
the high -frequency region is 6 db per
octave. This means that if the power
gain is a certain value at one frequency
then it will be 6 db greater at one -half
that frequency or 6 (lb less at twice that
frequency.
Noise figure is also an important consideration in the r.f. amplifier. Figure 3
is a plot of transistor noise figure versus
frequency. For any transistor in an FM
r.f. amplifier, only the right portion of
Fig. 8. Schematic of typical common -base FM converter.
lo
-
20
AUDIO
AmericanRadioHistory.Com
AUGUST, 1962
V
4.4
I(
PARTS LIST
C1, Ci
C2, C14 G.pt
C4, C7, C11, C19 .5-5pf
CSA, C5B, C12A, C12B 5-20pf
C6
C8
C9
C22 3.0 pr
RI,
R6
R2
10k
330
Ri
R4, R8
.82pf
27pf
120pf
C10, C16, C_I .05pf
C13, C18 Idpf
CIS 180pf
C17 2pf
C20 1.5pf
1000W
3900u
R5
15k
R7
1500u
12k
L2 .074 pL,
R9
LI,
L3
L4
.074ph,
LS
.0530,,
1.30,
ST
3T
R,F. CIIOKE
3T
TI I.E. TRANSFORMER E2601229AX
Fig. 9. Schematic of FM front end suitable for hi -fi applications.
ever, they will be sufficiently close for matching between the r.f. stage and emitter. Figure 7 is a plot of oscillator
mixer.
shift versus base voltage for two values
most initial designs.
The oscillator is usually a common - of feedback capacitance. With a little
Referring back to Fig. 4, C, is the
neutralizing capacitor which may or base configuration as shown in Fig. 6. experimental work, a value of feedback
may not be used. R2, which is bypassed C6 places the base at r.f. ground and capacitance could be determined to give
by C4, provides d.c. stability for temper- C4 provides feedback between collector the desired a.f.c. range.
ature and beta variations. R, provides and emitter to produce oscillation. A.f.c.
Figure 8 is a circuit of a common the bias to the transistor base from the does not seem to be necessary for fre- base converter, in which the oscillator
a.g.c. supply. R3 is inserted in the collec- quency drift with temperature. However, and mixer have been combined in one
tor lead to provide the necessary voltage for ease of tuning or where a varying stage. The same design considerations
drop for forward a.g.e. As the a.g.e. volt- supply voltage exists, some forni of a.f.c. must be given to the converter as to the
age goes more negative, the resulting may be desired. By varying the d.c.
-mixer combination. C, matches
increase in collector current produces base voltage, considerable variation in oscillator
to the input, C, pror.f.
amplifier
the
debe
can
obtained,
oscillator
frequency
more voltage drop across R, and R2,
thereby lowering the collector -to-emitter pending upon the amount of feedback vides the oscillator feedback, and L2 plus
voltage. Figure 5 shows how the 100 -hic capacity used between the collector and C2 provide the oscillator 11111,.11 circuit.
power gain of the 2N1742 varies with
the collector-to- emitter voltage.
E2600072AX
ST. I.E. TRANS.
Figure 6 is a circuit of a mixer and
2N1743
'oscillator stage. C, is the saine matching
4
capacitor shown in the r.f. amplifier
,'42
and matches that stage to the input of
the mixer. The input resistance presented
here would be the same as the short circuit resistance at the r.f. frequency.
R, and R, provide bias voltage for the
base. C, couples the proper amount of
oscillator injection voltage to the base.
330 (RL)
Approximately 150 my is sufficient for
/
lao
good conversion gain. Emitter injection
could also be used at this frequency with
:l
/
H
very little change in conversion gain
or required injection power.
The matching capacitor, C2í makes the
/
AUTOMATIC
base circuit a high impedance for the
DIVISION,
i.f. resulting in considerable degenera/
GENERAL
tion. C, and L, are a series 10.7 -hic
INST. CORP.
tuned circuit to correct this problem,
giving a considerable increase in conversion gain. It is imperative that the
base -to- emitter impedance be low at the
i.f. for good mixing action. This may
Fig. 10. Three -transistor FM front end.
also be accomplished with transformer
r----I
Ir-.
I
4.0
.
AUDIO
:
21
AUGUST, 1962
AmericanRadioHistory.Com
O
.
8
2N1745
.f
1.7 mA
E260072AX
1.6 mA
AUTOMATIC
DIVISION,
1.5 mA
GENERAL
INST. CORP.
á
o
î
05pf
Fig.
1
1 .
Low -cost three -transistor front end.
R
L, and C, compose the i.f. trap and
R=, and R, provide bias. The 10.7 -me
output is taken from the double -tuned
transformer, T,.
Performance
Several basic tuners are described be-
:I
A, B.
=2, C16
23,
--
,
1.
Ili Fi Three-Transistor Front End
A typical hi -fi front end is shown in
Fig. 9. It has a double-tuned r.f. input
and uses an r.f. transistor (T2028) whose
-.
C
1.50 RLJI IRC.,w
0-18pf TRIMMER ON LINING
:'cf DISC
C9
,
low in order of performance and, in
general, cost.
_'0
RI
393 OHM
R2
I500 OHM
R13,
-
FEEDTHROUGH
.
PCTGI.
56C0
OHM
R8, R12, R16 2700 OHM
R14, R18 1000 OHM
R15, R19, R26 220 OHM
R21, R24 4700 OHM
2pf DISC
C2I, C24 5pf SILVER MICA
C27, C28, C29 -005pí DISC
230 IOpf, 15 WV ELECTROLYTIC
R23
R25
C20, C22
:3, x.25, C26, C35
:is
_31
=32
R2A
OHM
86 4%. OHM
R7 IOk OHM
RIO,
R11,
R20,
R22
:
RI',
pf DISC
.05pf DISC
.05pf DISC
.302 pf DISC
30Ä, 15 ::V, ELECTROLYTIC
C33 50pí, 15' NV, ELECTROLYTIC
C34 100pf, 25 WV, ELECTROLYTIC
*RADIO CONDENSER CO.,
-
15k OHM
IOk, VOLUME CONT-
Rl'
82k OHM
130 OHM
R29
82
R30
2200 OHM, WIREWOUND,
OHM
17 /AIT
-
Fig. 12. Low -cost two- transistor front end.
22
noise figure is about 3-3.5 db at 100 me
and whose typical fma.a is 1800 me. The
r.f. and mixer are common- emitter; the
oscillator common-base. The separate
oscillator provides good stability and
may be a.f.c.'d if desired.
The input 3 -db bandwidth of the
double-tuned circuit is about 1.5 me and
the input loss about 7 db. The output
i.f. transformer has about 10 db loss.
The over -all tuner gain is about 25 db
giving a transistor gain of over 40 db.
?. Three -Transistor Front End
Figure 10 shows a conventional three tTansistor arrangement for high -quality
application. The 2N1742 has a typical
noise figure of about 4 db at 100 me
:nid a typical fma,. of 1200 me. The gain
i similar to the previous one (36 db)
including the i.f. transformer. However,
not as much care has been taken in de-igning for selectivity. The actual transistor gain of this complement is about
3 -5 db less than the previous unit. The
image and i.f. rejections are 38 and 60
db respectively.
3. Three -Transistor Low -Cost Front End
Figure 11 shows a three -transistor
front end using transistors of slightly
lower gain (2N1745 typical fma,,, 900 nie).
Neutralization is not used and the r.f.
stage is run grounded base to improve
the gain. As noted earlier, this sacrifices
some uniformity. However, tuners such
as this have been made in large quantities with no serious problems. The
typical noise figure of the 2N1745 is
about 4.5-5 db at 100 mc. The gain is
about 28 db over the band including the
loss in the first i.f. transformer. Image
and i.f. rejection are 40 and 60 db
respectively.
All of the above front ends use transistors which are functionally tested for
the specific applications to insure interchangeability. Many manufacturers, including Philco, also sell transistors which
are specified parametrically for low-cost
applications. While these transistors do
not have the control of parameters
found in functionally tested units, it is
possible to design sets with them if the
design approach is conservative. Such
a unit is described below.
4. Two -Transistor Low -Cost Front End
Figure 12 shows a two- transistor front
end using the T2399 (typical fr = 400
me). This unit is designed for low -voltage (6 -volt) operation. Both the r.f. and
converter are common -base for extra
gain. The typical noise figure of this
transistor at 100 me is 5 to 6 db. This
arrangement will provide a gain of about
25 db including the loss in the first i.f.
transformer.
Notice that the oscillator tank is in
series with the i.f. tank and capacitive
feedback is used for injection. In general, experience has shown that the gain
of the converter is similar to the same
AUDIO
AmericanRadioHistory.Com
AUGUST, 1962
25
REVERSE
20
MEASURED IN
AMPLIFIER TESTIRCUIT
IS
4
lo
z
O
g.
13. Typical
overload level vs.
power gain for
forward and reverse a.g.c.
f
Z
<
although it does not work well at low
frequencies (audio). The MADT® amplifiers are the only VHF transistors designed to make use of the forward a.g.c.
action. Forward a.g.c. is only effective in
the high -frequency region (on the 6-dboctave slope). However, even with forward a.g.e., the overload performance
and intermodulation in a transistor receiver are worse than a tube set. Subjective tests indicate transistors with forward a.g.c. are about 10 times worse,
with reverse a.g.c. about 100 times.
Herein lies the major problem in using
transistors. However, with careful circuit
design these problems may be minimized.
2N1742
FORWARD
5
io
2
-5
----
10
xo
MO
a
MOO
"O"
Reliability and Temperature
OVERLOAD LEVEL IN MICROWATTS
unit as a mixer. However, while one
less transistor is used in this arrangement it does have one serious disadvantage -the oscillator pulls on strong
signals. In general, when the r.f. voltage
applied to the emitter exceeds about
100-200k µv, the converter pulls badly
and may become inoperative. Thus, depending on the gain of the r.f. stage,
the converter will pull badly with input
signals in the order of 10 -30k µv. Two
methods exist for correcting this. First,
an overload diode in the collector circuit
of the r.f. stage will limit the signal
reaching the converter. Second, reverse
a.g.e. may he applied to the r.f. stage to
reduce the r.f. gain and thereby limit
the signal. Forward a.g.c. cannot be used
ill this ease because the low output impendance of the r.f. stage under full
a.g.c. also causes oscillator pulling. The
three -transistor tuner with the separate
oscillator virtually eliminates the pulling
and is therefore recommended wherever
AVERAGE OF
AUDIO
10.1)
UNITS
POWER GAIT.
12
15
5
10
13
4
NOISE FIGURE
4000
2000
o
Two types of a.g.c. action are available
to the transistorized FM circuit designer.
The first, reverse a.g.c., is accomplished
by reducing the current in the transistor.
This is usually done by applying the
a.g.c. voltage to the base. When the current is changed from the normal operating point down to about 50 p.a, the total
a.g.c. range will be about 10 db more
than the gain at the normal operating
point. This type of a.g.c. in general provides less center -frequency shift, less
bandwidth change (bandwidth reduces
with a.g.c.), but also much worse overload performance.
The second, forward a.g.e., is accomplished by reducing the collector -toemitter voltage. This is usually done by
applying a signal to the base which increases the current and drops the supply voltage across bypassed series dropping resistors in either the collector or
emitter circuits. This reduces the voltage
across the transistor. Forward a.g.c. re,Tilts in greater bandwidth and center-
18
(Continued on page
BANDWIDT-
possible.
A.G.C. -Overload- Intermodulation
While intermodulation is a problem
with transistors, improved reliability is
an asset. Experience has indicated that
most consumer products using transistors
have line and field reject rates an order
of magnitude better than vacuum tubes.
frequency shift but also gives much
better overload performance. Figure 13
shows a comparison of the overload performance of forward and reverse a.g.e.
Reverse a.g.c. is useful with all transistors and will work at all frequencies
Bou
6000
STORAGE LIFE (100 °C) HOURS
i
Fig. 14. Average curves of 2N1742 parameters vs. hours of life.
24
COLLECTOR
CURRENT
20
18
POWER
GAIN
16
16
-.
I4
BANDWIDTH
12
12
F
200 MC
2N 742
IO
8
e
6
NOISE FIGURE
4
4
2
o
o
-60
-40
0
20
40
60
so
100
-
AMBIENT TEMPERATURE °C
Fig. 15. Variations of power gain, noise figure, bandwidth, and collector current with
temperature.
AUGUST, 1962
23
AmericanRadioHistory.Com
Measuring and Matching the
Phono Equalization Curve
MANNIE HOROWITZ
To ensure optimum performance from a phono cartridge, the response
must be measured through the amplifier. Suitable equalizer circuits
which depend on the cartridge characteristics, can then be introduced.
may be divided into two major categories. One
type produces an output voltage
proportional to the amplitude of the signal recorded on a disc. The second, and
probably the most popular with audio fans, provides a signal dependent upon
the velocity of the stylus in the recorded
groove. In each category there can be
found good -quality and poor -quality
units for both stereo and mono.
PHON()(.RAP}I CARTRIIXES
Recordings and Cartridges
Group number 1 contains crystal and
ceramic types. The output of these cartridges is proportional to the recorded
30
B
Fig. 2. Theoretical
curves required to
record and reproduce constant amplitudes. A -A, recording curve with
constant-velocity
cutter; B -B, playback curve using
constant -velocity
cartridge; C -C,
p
lo
f
o
C
-lo
ai
constant- ampli-
_
tude record and
playback curve.
,0
s
IIII;IIi
1.
Signal recorded in groove.
amplitude in the record groove. All frequencies recorded with equal amplitudes
would theoretically produce constant
voltages at the terminals of the car tridge. If the recorded amplitude were
increased by a factor of two at any frequency, it would result in double the output voltage, depending upon the quality
of the specific cartridge and the amplifier
circuitry provided for reproduction.
Velocity- sensitive phonograph cartridges are exemplified by the magnetic
(variable reluctance or moving coil)
pickups. The output voltages produced
by these types of cartridges can be understood with the help of Fig. 1.
Assume the frequency of recorded signal A is 1000 cps and that of recorded
signal B is 2000 cps. Both signals have
been recorded with equal amplitudes in
the record groove. The stylus must travel
twice the distance to trace curve B as it
does in tracing curve A. The output from
curve B will be double that of curve A
Project Engineer, Electronic Instrument Co., 3300 Northern Blvd., Long Island City 1, N. Y.
A
Ii!IIlIIIIIIIpJ
I1III!!i!IUIII
IIIIR!1 IIIII
IIIIIuIIF"!uIIII
I
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i1
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FREQUENCY
Fig.
I
despite identical recorded amplitudes
because the stylus traveled twice the distance during the same interval of time.
From this it can readily be inferred that
during reproduction, the output voltage
is proportional to the frequency, assuming a constant recorded amplitude.
The velocity-type is generally used to
record dises. When this type of cutter
is being used, the voltage that must be
applied to record signal B must be double that used for signal A, if both are to
have the same groove amplitude on the
recorded dise. Stated more analytically,
to record a constant amplitude using a
velocity -type recording head, the voltage
applied to the head must vary directly
with the recorded frequency.
IN
c
_
NIL
,uom
CYCLES PER SECOND
Curve a -a in Fig. 2 shows the amplifier compensation required for recording
a uniform amplitude with a velocity -type
cutter while curve B -B shows the
equivalent curve required to reproduce
the constant recorded amplitude using a
constant -velocity cartridge. One is the
mirror image of the other about the zero
axis. Note its 6-db- per-octave characteristic. For completeness, c -c is drawn as
the recording and reproducing curve using constant -amplitude cartridges.
Recordings can be made using either
the constant- amplitude or constant- velocity characteristic, or a combination of
both. Assume for the moment that only
the constant -velocity characteristic is
used and that voltages equal in ampli-
30
p
ó
0
Fig. 3. Groove am-
plitude resulting
from applying o
: onstant voltage
to a velocity -type
cutter.
fQ
lo
0
0
ó
u
j
lo
.
-2(1
M
----
,o
ou
FREQUENCY
24
-
-
IN
AUDIO
AmericanRadioHistory.Com
MOW
CYCLES PER SECOND
AUGUST, 1962
-
30
o4
..
20
vs
10
lI
0
S,Pl
F
st
9
0
p
>
C,Or
>p
-
n
-
T
°
2170
500
-
y --
,W
--
-
- --
Y.,
ono
Kw
FREQUENCY IN CYCLES
It.
uai
0
CONSTANT RECORDED
VELOCITY
to
>
I..
I00
MO
MOO
FREQUENCY IN CYCLES PER SECOND
PER SECOND
recording. Practical curves have rounded corners. Fig. 5. (right) Recorded amplitude
f
Fig. 4. (left) Curve adopted by RIAA for
resultin g from constant -velocity cutter and RIAA recording curve.
tude at all frequencies were applied to two constant -amplitude sections. This to the amplifier is monitored. The VTVM
this cartridge. The recorded groove swing requires no record amplifier compensa- has been shown monitoring the generawould then vary inversely with frequency, as shown in Fig. 3. The amplitude in the record groove at the low
frequencies would be Much greater than
it would he at high frequencies. Choosing two extremes of the audio band, the
recorded amplitude at 30 cps is 500 times
that at 15,000 cps.
This condition is intolerable for two
reasons. At the extreme low frequencies,
the record groove would be exceptionally
wide. At the high frequencies, the recorded amplitude would be too low to
override the record surface noise.
To overcome this, the RIAA (Recording Industry Association of America)
adopted the recording curve shown in
Fig. 4, which has become the standard of
the industry. Assume that the record
amplifier has been designed to produce a
signal at the head having the frequency
response of the curve shown in Fig. 4.
Now apply a uniform signal to the recording amplifier. The resulting groove
cut on the record will have the charac-
teristics of constant -amplitude recordings up to 500 cps. This limits the groove
swings at the low frequencies. The constant-velocity mode is used from 500 to
2120 cps. In this range, the groove swings
decrease when a uniform signal is applied to the head. Above 2120 cps, the
constant- amplitude characteristics take
over to allow the high frequencies to
override record noise. Here, as below 500
cps, a constant -amplitude groove is recorded for applied constant -amplitude
voltages to the record head. The resultant
excursions in the recorded groove are
shown in Fig. 5.
Figure 5 results from the following
considerations : The recording a in pl iiie r
compensation curve required to produce
uniform groove excursions at all frequencies using a velocity-type cartridge, must
have the rising characteristic of A -A in
Fig. 2. This is the slope of the constant amplitude sections in Fig. 4. A constant v1.IIII'ity section is drawn between the
AUDIO
A
tion as it follows the natural characteristics of the velocity -type record head. In
this range, recorded groove excursions
vary inversely with frequency. The net
recorded amplitude of the curve in Fig.
4 thus becomes the curve in Fig. 5.
Reproducing records using a constant velocity cartridge requires a playback
amplifier with the frequency- response
curve being the mirror image around the
0 -db axis, of the curve shown in Fig. 4.
An exact curve, with the corners rounded
off, is drawn in Fig. 6. Adding the curves
ill Fig. 4 and 6 (assuming the practical
version of curve 4 has rounded corners)
will result in a flat output along the 0-db
axis. Obviously, to reproduce the input
signal faithfully there must be a uniform
output from the playback preamplifier
for a uniform input to the record amplifier.
The setup shown in Fig. 7 is used for
Measuring the response of the amplifier.
A more complete test would include employing the particular cartridge to be
used with the amplifier, as an integral
part of the test circuit.
Checking the Equalization Curve
A VT \ \I is sln
I
I
Monitoring the
Intput front the signaI generator. Greater accuracy can be aehieved if the input
tor not only because of simplicity in
presentation, but also because of the
smallness of the resulting error.
The unit under test is assumed to be
a preamplifier. Because of its relatively
high output impedance, the connecting
leads to the output meter and scope
should be of the low-capacitance shielded type. The test instruments should present a low capacitance to the preamplifier. If an integrated preamplifier-power
amplifier is under test, all that would be
required is the addition of a non-inductive load resistor at the output.
The Aux input is assumed to encompass that portion of the preamplifier
exhibiting a flat response (i.e. no equalization). Other inputs with this characteristic may be labelled TUNER or MULTIPLEX.
The PHONO channel performs two
functions. First it encompasses the amplification necessary for the low-voltage
output from the constant -velocity cartridge. Next, it provides the equalization
necessary for the particular cartridge.
In the test procedure, the output from
the signal generator is first fed to the
AUX input. A considerably reduced signal, attenuated by the action of the 1000 ohm to 10-ohm voltage divider is then
fed to the PHONO input. if these resistive
10
Fig. 6. RIAA playback curve.
III
IO
u
''1i\
0
20
lo0
In
Imro
moo
FREQUENCY IN CYCLES PER SECOND
AUGUST, 1962
21
AmericanRadioHistory.Com
Iro
Fig. 7. Equipment set -up for measuring the phono equalization curve.
values load the audio generator excessively, the resistors in the dividing network may be increased proportionally.
The desired signal level can be chosen
using the DPDT switch shown in the
drawing.
In most amplifiers, the PHONO and the
Aux grounds on the preamplifier section
are independent to prevent hum- sensitive loops from being formed between
these inputs. To avoid any upset of this
condition and to maintain the independent ground returns built into the amplifier, the ground lead from the signal generator should be switched when the specific input and signal level is chosen.
This is accomplished using the DPDT
switch.
The actual check should be accomplished using the following procedure to
avoid false measurements : Feed the signal to the Aux input; adjust all frequency- compensating controls for a flat
output ; switch to 30 cps and turn up the
level control to the point just before the
preamplifier begins to distort; then make
a note of this indication in db, on the
output meter.
Now feed 1000 cps to the PHONO input.
Set the level control on the signal generator so that the meter at the output
of the preamplifier indicates some convenient point 19 to 25 db below the
reading taken above at 30 cps. This is
the reference or 0-db level. Measurements
at other frequencies are referred to this
figure in terms of the number of db
above or below this 0 -db level.
Select several frequencies on the curve
in Fig. 6. Set the generator to each of
these frequencies. The output from the
generator must be maintained at a constant level, as read on the input- monitoring meter. Note the indication in db above
and below the 1000 -cps reference frequency. Compare these with the various
points on the curve in Fig. 6. A good
amplifier follows this curve with less
than 2 -db variation.
A more precise test includes the inductive effects of the cartridge to be
used with the system. This factor becomes more critical when the cartridge
is loaded by impedances other than that
prescribed by the cartridge manufacturer. When the preamplifier under test
is transistorized it is important that the
cartridge be included.
Proper measurements will result only if
the cartridge is placed in series with the
111ONO input from the generator. Excessive high- frequency rolloff (possibly due
to tapaeitance in the lead between the
cartridge and the preamp) can then be
adjusted reasonably well by increasing
the input resistor to the PHONO preamplifier. Low -frequency inaccuracies may
require redesign of the equalizing network.
Constant -Amplitude Cartridges
The output from these cartridges are
theoretically proportional to the recorded
amplitude as shown in Fig. 5. The playback curve must be the mirror image of
this curve around the 0-db axis. An exact
drawing of this curve, with corners
lo
Z
Z
i0
S
Fig. 8. RIAA curve
for reproduction
using a constant -
S
re
s
too
IOW
FREOUENCY
IN
wan
quencies.
In this circuit,
R
R + X,
Eq. (1)
jwRC
jwRC +1
Eq. (2)
Void = Vin
or
Vout
Vln
R
R+
1
jWC
resulting in the gain curve shown in Fig.
10. The numerator indicates that at 0
cps, the output is zero, and rises from
EQUIVALENT
I
CIRCUIT OF
CERAMIC
CARTRIDGES
Fig. 9. Equivalent circuit of a ceramic car-
tridge feeding
a
resistive load.
there. The denominator indicates the frequency at which the output has dropped
3 db from the maximum flat output. The
3-db point is reached when, in the denominator, jwRC = j.
The capacitance of the cartridge is
usually assumed to be 500 pf. The frequency where the output has fallen 3 db
is, from Eq. (2).
f = 1 /2nRC
Eq. (3)
for at this frequency, the jwRC term in
the denominator Eq. (3) is equal to j.
Referring back to the curve in Fig. 8,
the response is down about 12 db at 30
cps. Figuring back, it would be down
6 db at twice this, or 60 cps, and would
be at the break point, which is already
3 db down, at 120 cps. Substituting this
information into Eq. (3), yields a required load resistor, R, equal to
amplitude car-
R= 1/2afc= 1/6.28x120x5x10-10
tridge.
= 2.7 meg
Eq. (4)
Unfortunately, few amplifiers have
load impedances of that magnitude at
the auxiliary inputs. A cathode follower
at the input is required to provide this
impedance. If the input impedance is 2.7
megohms, response at the eta input
-lo
'
rounded off to reflect more accurately
actual component characteristics, is
drawn in Fig. 8.
The outputs from amplitude-sensitive
cartridges are usually reproduced
through linear amplifiers. For accurate
performance, the cut at the low frequencies and the boost at the high frequencies
must be built into the cartridge. The
high- frequency boost is achieved by resonances purposely designed into the unit.
Low- frequency cut is a function of the
loading at the output of the cartridge.
The equivalent circuit of this type of
cartridge is voltage source in series with
a capacitance. The load resistor shown in
Fig. 9 determines the loss at the low fre-
OS
CYCLES PER SECOND
26
AUDIO
AmericanRadioHistory.Com
AUGUST, 1962
J
r
(A) APPROXIMATE RESPONSE
o
3db
(B) ACTUAL RESPONSE
NM
-6db
-I2db
f2
fo
io
fi
4
'T
f°--2.1.
2
C
of
°
°
Fig. 10. Response of circuit of Fig. 9.
should be measured as described in the
previous article. The output must be
flat to enable the cartridge and preamplifier combination to provide the
curve shown in Fig. 8.
It is frequently desirable to send the
signal through the phono preamplifier
when these cartridges are used. This
serves the dual function of modifying
It
record manufacturers have settled on the
RIAA curve as standard. Older units
may still incorporate the various equalizations.
One of the popular types of amplitude-sensitive cartridges is made by
Sonotone. They recommend that the circuit shown in Fig. 11 be used between
the ceramic cartridge and the velocity equalized phono preamplifier. This network is used to modify the curve originally used with velocity -type cartridge
to a curve suitable for use with ceramic
amplitude-type cartridges.
An analysis of the circuit in Fig. 11
can become quite involved but is nonetheless worthwhile. The general sinusoidal solution can be applied to other
constant -amplitude cartridges as well as
to the Sonotone ceramic units for which
the circuit was originated.
The equivalent circuit of the cartridge
remains a voltage source, em, in series
with a capacitor, C2 The remainder of
the circuit shown is designed to reproduce
a record properly through an amplifier
equalized for a velocity -type cartridge,
while using one of the ceramic variety.
Considering the circuit as a voltage
divider,
R=
cowEQUIVALENT
I
CIRCUIT OE
CERAMIC
CARTRIDGE;
l
-- -
X
-J
cartridge and phono preamp with constant- velocity equalization. C1=1000 pf;
C2 = 500 pf; R1 = 68,000 ohms; R2 = 5000
to 30,000 ohms.
the extreme requirements placed on R
in Eq. (3) while permitting exact equali-
zation for the different types of older
records, when this is required. In the
past, it has been the practice to provide
these different equalizations in the phonograph preamplifier for velocity-type
cartridges only. These equalization
curves are not shown here. The modern
amplifier seldom includes these. for all
T
T
T
I
Xi2 =
+
(5)
ebta
Pin
R, (jwC2) ( i + jwC,R, )
(jwC,R, + 1) + jcaC,R, +
1+ jwCQR,
Eq. (6)
Now, let k = C,R, jn = C,R, jm = C2R2j
and S = jw. Substituting these into Eq.
(6), and simplifying all terms inside the
parenthesis, results in
eout
Sm(1 +Sn)
ei
S1nm +Sm +Sn +1 +Sk
Sm(1 +Sn)
Eq. (7)
nn,S2 +S(tn +n +k) +1
The two component factors in the denominator can be found by first letting
the denominator be equal to zero. Thus
R,, (jwC2)
S2
+S(m
\
m
jwC,R, +
nm
urn
yields:
(Zt)2 -4/nm
S S,- -(Mt)
2
2
Eq. (8)
A=
V£t) 2 - 4 /nm,
solutions for S are
S, =
of the
C while
-t+A
the two
Eq. (9)
and
S,
It also follows that R,
C2
_ R, /jwC,
R,
1
= Et, and solving' for
nm
the two values of S, namely S, and St,
Letting
.
1
+n +k
+n +k
Now letting
R3
is the impedance
R,+
-
A
Eq. (10)
2
Substituting this back into Eq. (7),
produces
:
1
Sm(1+Sn)
Pout
(S +Mt2A) (S +Xt A\
.2
Substituting this into Eq. (1), and
dividing both sides of the equation by
ein
e,
' This type of solution can be found in
Most algebra books as a solution of the
equation ax' + bx +c =O. Here the two solu-
, yields
-
Pin
I
I
:
R3
Pout
II7
-lo.';IIII-
RQ
+
R2
1
/a)C_ +
tions of x are x,,,=
pa' ,R, + 1
-b± Vb'-4ac
$a
I
I I
fr
RIAA CURVE
p
l
1
l
II
10
SUMOFBOTHCl1tVES
_
F
II
5
IIUU!!EIIi11ÍÍ
S
1
o
1
o
nrr.
10
11111111111111111111111
p
-
R'Xo1
R, + X,.1
parallel combination of R, and
RESPONSE CURVE PORING!
--lo
+
`=
whereR Xi
Fig. 11. Network used between ceramic
;
(ein)
Simplifying this,
V
.
IW
1111
ICO
FREQUENCY
IN
1111
Ii00
f000C
RI
Ib
inn
FREQUENCY
CYCLES PER SECOND
IN
I000c
nam
CYCLES PER SECOND
Fig. 12. (A), left, shows curves used to reproduce with a ceramic cartridge. A -A -A, response curve of Fig. 11; B -B -B, RIAA playback
curve, built into preamp; C -C -C, the sum of curves A -A -A and B -B -B. (B), right, practical result of the C -C -C curve resulting from the
circuit of Fig. 11.
AUDIO
27
AUGUST, 1962
AmericanRadioHistory.Com
jwm(1+jwn)
jw
MtH--
Al
k= C=R, = ( 5 x 10-1°) (68 x 10 )=34x10-6
m=CsRs= (5x10-10)(5x103) =2.5x100
k+m+n=1.045x10-4 ^ 1.05x10-*
mn=(68x10-6)(2.5x10-*)=1.70x10-10
_k+m+n-1.05x10-*
2
(1 + jwn)
(/21)E
( (`f +A /2 +1)
A=V(Mt)i--4 =
mn
38x1010
q. (11)
Analyzing Eq. (11) results in the following four characteristics.
jcom
1.
-
+
A)
a constant factor
°ls =
not affecting the frequency response any
more than to show that at zero cps, the
output is zero, and that the output rises
at the rate of 6 -db- per -octave from
there.
2. The (1+ jam) indicates the point
where the curve starts the second 6 -dbper- octave rise. The frequency where
the rise has advanced 3 db can be found
by making jc0 = j or w =1 /n. Call this
w,.
and 4. 1+
jut
and 1+
(Mt +A) /2
jw
indicate the point where the
(fit - A) /2
curve starts dropping at the rate of 6db-per -octave. The angular frequencies
where the output has dropped 3 db from
its former plateau, can be found by
making the j terms in both factors equal
to j.
Thus
(
Call this
st -A
2
.
°I +uA )
mn
j,
or
ßt
=2
6.17x105 +5.97x10
so that fs
and
=2 = 96,500
f, =2n =1600
and
f=
'
f
Eq. (12)
To calculate f, and
it must first be
noted that R, can vary from 5000 to 30;
000 ohms. It will be necessary to calculate f2 and f, for both values of R,.
First, assume R2 = 5000 ohms. Then if
n = 68 x 10-0 (front previous calculations)
1
I
EOUIVALE'
CIRCUIT :
CERAMd.
.
'
I
I
L____J
CARTRID.!
Eq. (13)
Eq. (14)
cps
m =C2R3= (5x10-1O)(3x104) =15x10
k +m +n =117 x10 -6= 1.17x10-*
m n = (68 x 10 -0) (15 x 10 -6) =1.02 x 10-6
Mt_
1.17x10-4=
1.02 x 10 -8
1.17x10
A= \/(1.17 x105)2
4
=
1.02 x 10 -9
0.99 x
10.
Substituting these values into the equation for ws and w, gives
1.17x105 +0.99x105
ws=
= 1.08x10'
cos
=
1.17 x10'- 0.99x105
2
0.09x105 =9x10'
(68 x 103) (10 -6)
14.7 x 103
= 2350 eps.
eps
n= 68x10-°
k=34 x10-6
1
C,R,
11
2
Using the constants called out in Fig.
w`
î x1
while f = 2350 eps from Eq. (12).
Now assume the other extreme where
R2 is equal to 30,000 ohms.
11 to find co, results in
1
= 6i.0
2
Call this
_1_
5.97x10
6.17x105- 5.97x105_10*
A
=j, or w=
and
,
w
4
=
1.7 x 10 -10
Substituting these figures into the
equations for w3 and w, gives
2
3.
1.7x10-10=6.17x10'
mn
2
\Mt+A)>;
I
Fig. 13. Circuit used with a ceramic cartridge when feeding a relatively low im-
pedance amplifier input.
so
that f s =
ws- 1.08x105
2n
6.28
= 17,300 cps
Eq. (15)
and
f, =2n =1430
cps
Eq. (16)
while f,= 2350 cps from Eq. (12).
The break points, f, and f, involve
resistor R2. It is interesting to note how
insignificant a part the variation of R2
front 5000 to 30,000 ohms plays on the
break points and consequently on the
resulting frequency response of the network. When fs was calculated for a value
of Rs equal to 5000 ohms, the break point
was at 96,500 cps, Eq. (13). Calculated
for Rs equal to 30,000 ohms, it was 17,300
cps, Eq. (15) . For all practical considerations, both frequencies are outside the
audio spectrum.
However, f, falls well within the audio
spectrum. It is 1600 cycles when R, is
5000 ohms and 1430 cps when it is 30,000
28
ohms. Audibly, it is at about the same
frequency. We shall compromise and
consider f, to be 1500 cps.
f, does not involve Rs and remains at
2350 cps regardless of what R, is. Variation of R, will not affect frequency response to any noticeable degree. It will
affect the voltage output from the network. R, should be chosen so that a
ceramic cartridge, when played through
a velocity -equalized preamplifier, will
provide sufficient output without overloading the preamplifier stages.
The response curve of this network,
using a ceramic cartridge is shown in
Fig. 12. The RIAA playback curve originally drawn in Fig. 6, is repeated in Fig.
12 with the corners squared off. This is
an integral characteristic of the phonograph preamplifier in question. The sum
of the two curves is the resultant curve
necessary to reproduce the output from
a ceramic cartridge properly.
Two things should be noted. First, the
high -frequency boost from the network
in Fig. 11 is just about cancelled by the
built -in rolloff characteristic in the preamplifier at these frequencies. The resultant response at these frequencies is
flat. At the lower frequencies, the curve
conforms with that required to reproduce
the output from a ceramic cartridge
properly at these frequencies.
The flat response at high frequencies
as shown in Fig. 12 does not prevent the
boost shown in Fig. 8. The rise in response is still present due to the built -in
resonances in the cartridge, as discussed
previously.
Checking the preamplifier response
using this network is straightforward.
First check the preamplifier stage as
previously described. Next, insert the
network of Fig. 11 between the oscillator
and the preamplifier. A 500 -pf capacitor, representing the equivalent capacitance of the cartridge, should be inserted
in series with the lead from the signal
generator. The resultant output should
follow the combined curve in Fig. 12,
but with the corners rounded off, as
shown in (B) of Fig. 12.
Ceramic Cartridges Feeding
Medium Impedances
Any arrangement which results in a
curve approximating that shown in (B)
of Fig. 12 would result in proper reproduction from a disc recorded in accordance with the RIAA curve, when it is
played with a constant -amplitude type
of cartridge. Compensation is required
only at the lower frequencies. The required high- frequency boost is controlled
by resonances built in the cartridge.
Let us now assume that the input impedance at the amplifier is less than the
2.7 megohms recommended for R in Fig.
9 and determined by Eq. (4). In this instance, the circuit drawn in Fig. 13 may
(Continued on page 87)
AUDIO
AmericanRadioHistory.Com
AUGUST, 1962
.
r
PRODUCT PREVIEW SECTION
Presenting the annual compilation of the new -and some of the
old standby -products that will be shown by your hi -fi dealer during the coming months, and at the Fall High Fidelity Music Show.
WHEN THE
111
-F! MAN l-l'.1! "l'rl{iais
bring forth their annual crop of
new and improved products, they
are understandably anxious that everyone should know all about them. We are
in full sympathy with this desire to the
extent that we employ the August issue
as a Product Preview, and then-to continue the service -we make the entire
section available later in a handy -sized
book for continued reference. This book,
to be published September 15, is known
as the AUDIOGUIDE.
In an attempt to arrive at some sort
of uniformity in the descriptions of the
products shown, we tried out a new
scheme this year. Each manufacturer
was furnished forms for each eategury
of products, with spaces for the ill
formation we think is important to the
potential purchaser. This had, w,
opined, two advantages -one being that
the manufacturer could choose which
item he wished to feature in each category, and the other being the ultimate
presentation of the material in a uniform order. The most important thing
we learned was how to make forms, but
we do believe that more information is
provided about the products and in a
more consistent form than heretofore.
We have continued the style of presentation, allowing a listing of up to
five items in addition to the principal
one, but without description in detail.
Thus we have 3S pages of information
ill
this issue-and nearly 12 more of
AUDIO Size will be added in the AUDIO i;UtDE. The additional material consists
of more illustrations and a few items
which had to be eliminated because of
space. We hope, however, that the new
forni of data presentation meets with
readers' approval.
The specifications given are those provided by the manufacturer. Prices
quoted may vary between East and
West, but only one price is shown. In
any instance. for further information
about any product described or listed
but not described, just write to the
manufacturer at the address given -he
will be glad to hear from you.
sr
BASIC AMPLIFIERS
ALTEC
3511 Solid -State Power Amplifier. The 351A
is a 50 -watt transistor amplifier for mono,
stereo, third channel or hi fi music distribution use It has the advantage of smaller size,
lighter weight, less power consumption, and
less heat generation than any vacuum tube
counterpart. It provides 8 and 16 ohm speaker
connections, plus an isolated 70 volt line (125
ohm) output for distributing sound to other
speakers located throughout the house. The
351A represents an achievement in circuit design in that the rated power is developed over
essentially the entire audio band at low distortion. Common power transistors become
very "lossy" in the upper audio range and
destroy themselves if operated continuously in
that area The 351A uses one of the most
costly types, known as the "diffused-alloy
transistor" to achieve its excellent high frequency performance.
l
FISHER
-; n, -ft l!n -bull sicrco Power
AmDud()
plifier. Consisting of two identical basic amplifier channels for both stereophonic or
monophonic reproduction, the SA- 300 -R offers
laboratory quality at a fraction of the usual
cost of equipment of this calibre. Hum and
noise content is less than 1 /1000th of 1% of
full rated output A center-channel output is
included for connection to a third amplifier
and loudspeaker system to fill the center of
the stereophonic sound pattern.
Specifications: Tube /transistor complement
10 tubes and 1 selenium rectifier; freq. resp.
20 to 20,000 cps ± 0.5 db at 30 rms watts output ; power bandwidth, 15 to 30,000 cps;
IHF\1 music power output, 45 watts per channel ; power output, runs, 38 watts per channel;
harmonic distortion, 0.5% at 40 watts from
I
il EL.i4 (I) GZ34: Freq. Rest). 20 to 20k
output power out -
clue + 0.5 db at 30 watts
put, ems, 30 watts per
;
channel
;
harmonic
!
distortion, 0.1% nt 30 watts ; hum and noise,
80 db below 30 watt output ; sensitivity, input for rated output. 120 my ; damping factor, 25 ; output impedances 4, 8, 16 ohms ;
convenience outlets 1; weight 27'/ lbs ; dimensions : 10 %" wide, 137,f," high, 67.f," deep;
price, $219.00. Ercomt Corp., 16 W. 46th St.,
New York, N. Y.
1. "Stereo 20" Amplifier
$149.00
MARANTZ
.$iode! Sit Dual 35 -watt Stereo Amplifier.
cps; IM distortion, 0.3% at 45
watts; hum and noise, 100 db below 1 watt
output ; senstitivity, input for rated output,
20 to 20,000
Long considered amongst the top as a stereo
amplifier, the Model 8B offers more than per-
volts; damping factor, variable; output
impedances, 4, 8, 16 ohms; controls, a.c. bal.,
bias adj, hum, separate input levels, d.c. bal.;
switches, a.c. balance; convenience outlets. 1;
weight, 32 lbs ; dimensions, 16%" wide, 614"
high, 7 %" deep. Price, $I99.50 assembled.
Fisher Radio Corp., 21-21 44th Drive, L. I. C.,
0.8
4
N. Y.
I. Model
SA -100 50 -Watt Laboratory
$119.50
Standard Stereo Amplifier
Specifications: Transistor complement 9 ;
Freq. resp. 20 to 20,000 cps ±.f db ; IHFM
music power output, 50 watts ; bum and noise,
90 db below rated watt output ; sensitivity,
input for rated output, 0.45 volts ; damping
factor, 7.5; output impedances. 4, 8, 16, 125
(70.7 v) ohms ; weight, 14.5 lbs ; dimensions:
97/s" wide, 496" high, 8,4" deep ; price,
$234.00. Altec Lansing Corp., 1515 S. Manchester Ave. Anaheim, California.
.
AUDIO
LEAK
"Stereo 60" Amplifier. Engineered for top level performance, the Leak "Stereo 60" provides sufficient undistorted power to drive
any modern speaker system.
Specifications: Tube complement (3) ECC83,
formance ; it offers performance at top level
for a long time. All components are used conservatively, as well as being of the finest
quality. Construction practice is professional.
Specifications: Tube complement (2) 611116,
(2) 6CG7, (4) EL-34; freq. resp. 20 to 20k
29
AUGUST, 1962
AmericanRadioHistory.Com
± 0.1 db at 35 watts output ; power bandwidth, 15 to 40k cps ; power output, rms, 35
watts per channel ; harmonic distortion, 0.5%
at 35 watts from 20 to 20k cps; IM distortion,
0.5% at 35 watts; hum and noise, 80 db below 1 watt output ; sensitivity, input for
rated output, 1.3 volts ; damping factor, 20;
output impedances, 4, 8, 16 ohms : controls,
bias adjust, meter; switches, test; weight,
50 lbs ; dimensions, 131F," wide, 7 %" high.
10%" deep: price. $164.00. Accessories, 8G
Grille $9.00 Marnntz Company, 25 -14 Broadway, L.I.C., N.Y.
cps
Model 9, 70 -w mono power amp
2. Model 9, 70 -w, 70.7 volt output
1.
....$324.00
....
354.00
McINTOSH
Dual 75 -matt .inydifirr .Void
The
reserve built into every "Mac" and the quality
of component parts frees you from making
critical adjustments. McIntosh has better performance with no bias controls and no balance controls. Of all amplifiers made and advertised, only McIntosh offers such low distortion with such reserve power. The patented
McIntosh unity-coupled circuit makes this
possible.
level control ; switches, power switch ; weight,
26.5 lbs ; dimensions, 14 "% wide, 7%" high,
8%" deep. Pioneer Electronic Corp., 5 Otowacho 6- chome, Bunkyoku, Tokyo, Japan.
1. HF -90 MH, 200 -ohms output
QUAD
It
Power Amplifier. The QUAD II
is designed to operate with the QUAD 22
control unit and therefore has no controls
or switches. Stability and performance are
independent of signal or load conditions so
that this amplifier is suitable for use with
any speaker system. A feature of this unit
is its ability to maintain its specified performance even when tubes are replaced at
random.
QUAI)
makes it especially convenient for use as a
3rd -channel amplifier or as a booster amplifier
(in pairs for stereo) for remote speaker in-
stallations.
Specifications: Tube complement (4) 7189,
12:1.V7, GZ34 ; freq. resp. 20 to 20k cps ± 2 db
at 36 watts output ; IIIFM music power output, 40 watts per channel ; power output,
rms, 36 watts per channel; harmonic distortion, 0.7% at 36 watts from 25 to 20k
cps ; IM distortion, 11/2% ut 40 watts ; hum
and noise, 7.5 db below 1 watt output ; sen-
sitivity, input for rated output, 0.18 volts ;
damping factor, 10; output impedances,
4, 8, 16 ohms ; controls, sensitivity. output
tube balance; switches. output tube test;
convenience outlets, 1; weight, 15 lbs ; dimensions, 131% wide, 6" high, 4%" deep;
price $59.50. Accessories : case. $6.00. Sherwood Electronic Labs, Inc., 4300 N. California Ave., Chicago 18, III.
BASIC AMPLIFIER
KITS
DYNACO
Specifications: Tube complement EF86(2),
KT66(2), GZ32: Freq. resp. 10 to 50k cps
0.5
db at 1 watt output ; power bandwidth,
±
to to 15k cps ; IIIFM music power output,
11.5 watts per channel ; power output, rms,
23 watts per channel ; harmonic distortion,
2% at 23 watts; IM distortion, 114 %n at 25
watts ; hum and noise, 80 db below 1 watt output ; sensitivity. input for rated output, 1.4
volts ; damping factor. 10; output impedances,
8, 16 ohms weight, 181/4 lbs ; dimensions, 13"
wide, 41,2" high, 6%" deep ; price, $125.00.
Lectronics of City Line Center, 7644 City
Line Ave., Philadelphia, Pa.
Stereo 70 Dual 3.5 -watt Stereo Power Amplifier Kit. Includes pre -assembled etched circuit
for maximum reliability and ease of construction plus Dynaco output transformers. Stable
with any loudspeaker. with excellent damping and square wave and pulse test performance. Output tubes operated at only 65% of
capacity and filter capacitors at less than
85% of rated voltage -really conservative
design.
;
Specifications: Freq. resp. 16 to 60,000 cps
+0.25 db ; output, rms, 75 watts per channel;
harmonic distortion, less than 0.5% at 75
watts from 20 to 20,000 cps; IM distortion,
less than 0.5 at 75 watts ; hum and noise, 90
db below rated output ; sensitivity, input
for rated output, 0.5 volts ; output impedances, 4, 8, 16 ohms stereo. 2, 4, 8, 16, 32
mono; controls, 4 separate input gain ;
switches, power, stereo /mono ; weight 67 lbs ;
dimensions, 1714" long. 8" high, 12l4" wide;
price. $444.00. McIntosh Laboratory Inc., 2
Chambers St., Binghamton, N. T.
I. MC 225, dual 25 -w amp
2. MC 240, dual 40 -w amp
3. MC 75, mono 75 -w amp
$198.00
288.00
229.50
RAVENSWOOD
Model l'A 800 Dual -45 -watt Power Amplifier. A high -power amplifier designed for the
finest of systems and especially to drive
heavy -duty speakers, the PA -800 is ideal
for installation in systems which permit out of-sight location and thus require no ex-
pensive housings for the amplifiers.
Specifications: Tube complement (2) 7199,
( -1) EL.14 ; Freq. resp. 20 to 30.000 cps ± 0.5
(lb; IIiFM music power output, 65 watts per
channel harmonic distortion, 0.6% ; IM distortion, 1.1%r rated output ; hum and noise.
80 db below 1 watt output ; dimensions : 16"
wide, 5%" high, 614" deep ; price, $199.95.
ItAVENSWOOD, Edgewood & McGuckfan Sts.,
Annapolis, Md.
;
PIONEER
HF-9011, Monophonic
(Bash
Lnplifier. The
Model 11F -90M is a power amplifier with a
maximum output of 100 watts and is suited
for use as a professional playback component
when used in conjunction with a preamplifier. One use would be in a large auditorium
or dining room.
Specifications: Tube complement (3) tubes,
(3) silicon diodes ; freq. resp. 20 to 30,000
cps + / db at 70 watts output ; power bandwidth, 20 to 30,000 cps; IIIFM music power
output, 100 watts; power output, rms 80
watts ; harmonic distortion, 1% at 80 watts
at 1 k cps ; IM distortion, /% at 80 watts;
hunt and noise, 73 db below 1 watt output ;
sensitivity, input for rated output, 0.9 volts:
output impedances, 4, 8, 16 ohms; controls,
H. H. SCOTT
208 80-Watt Stereo Power Amplifier. A mod-
erate power basic amplifier featuring low distortion. Well suited for most modern systems
in conjunction with a preamplifier.
Specifications: Tube complement 6 tubes
and selenium rectifier; Freq. resp. 20 to 20k
cps _+ 1 db at 10 watts output ; power bandwidth 19 to 25k cps; IHFM music power output, 40 watts per channel ; power output,
rms, 36 watts per channel ; harmonic distortion, 0.8% at 10 watts from 20 to 20k
cps; IM distortion 0.5% at 10 watts; hum and
noise, 80 db below 1 watt output; sensitivity.
Input for rated output, 1.5 or 2.5 volts;
damping factor, 16.1 ; output impedance, 4,
8, 16 ohms ; convenience outlets, 1 ; weight
27 lbs; dimensions, 16" wide, 51,4" high, 7"
deep; price, $134.95. H. H. Scott, Inc., 111
l'owdermill ltd., Maynard, Mass.
SHERWOOD
40-Watt Basic Mono Amplifier. The
30(1 is a basic power amplifier with 40 -watt
music power output. Its long life and minimum distortion have won for it selection on
such vital government installations as the
Astronaut Project Mercury. Its compact size
S -360
30
Specifications: Tube complement (4) Á'L34,
(2) 7199, GZ34, selenium rectifier; Freq. Resp.
Io to 40 k cps + 0.5 db at 1 watt output ;
power bandwidth, 20 to 20 k cps. IM distortion 1% at 35 watts; hum and noise, 74 db
below I watt output ; sensitivity, input for
rated output, 1.3 volts ; damping factor, 15;
output impedances. 4, s, 16 ohms ; controls.
biaset for each channel ; switches on-off/
stereo -mono ; weight 28 lbs dimensions, 13"
wide, 91/2" high 614" deep. Price $129.95 assembled, $99.95 kit. including protective cover.
Dynaco Inc. 3012 Powelton Ave., Philadelphia,
Pa.
1. Mark III 60 -watt mono amp kit ....$ 79.95
2. Mark III -70 60 -watt amp kit with
usual and 70 -70 output
84.95
3. Mark III -500 60 -watt amp kit with
either 500 or 125 output
89.95
4. Mark IV 40 -watt mono amp kit
59.95
5. Stereo 35, dual 17.5 -watt amp kit
:
;
(new Nov. 19621
EICO
HF89 100 -Watt Stcrco Power Amplifier Kit.
Each power amplifier section of the 11F89,
conservatively rated at 50 watts, employs
the proven cathode -coupled phase- inverterdriven circuit, preceded by a direct -coupled
voltage amplifier. Fixed- biased, plush -pull
EL34's are used in the output stage and provision is made for both bias and d.c.- balance
adjustments. The very -low -impedance characteristics of silicon diode rectifiers give the
common power supply for the two amplifiers very good regulation. so that signal conditions in one amplifier have negligible effect
AUDIO
AmericanRadioHistory.Com
59.95
AUGUST, 1962
111
}
on operating conditions in the other. To en-
H. H. SCOTT
sure long life for the silicon diode rectifiers,
electrolytics, and tubes, a surgistor is included to limit the starting surge currents.
Specifications: Tube (1) ECC83 /12Á.V7,
(2) 6SN7GTB, (4) EL34, silicon diode power
supply Freq. resp. 5 to 100k cps ± 0.5 db at 2
watts output ; power bandwidth, 15 tu 100k
cps; power output, rms 50 watts per channel;
harmonic distortion 1% at 50 watts from 20
to 20k cps; IM distortion, 0.5% at 100 watts;
Inns and noise 80 db below 1 watt output ;
sensitivity, input for rated output, 055 volts;
damping factor, 12; output impedance, 4, 8,
1.10 -Watt
Stereo Power Amplifier
Kit. Matched 6550 output tubes, rated at
100 watts, are used well below manufacturer's ratings to assure long operating life.
Switchable subsonic filter permits the use of
the LK -150 for laboratory applications where
response below 5 cps is required. Input sen .itivity- Is switchable between 2.5 volts (for
be LC-21 and other Scott preamplifiers) and
colts for preamplifiers with lower output.
LK -150
;
and no se, 90 db below rated output ; sea,$
tivity, Input for rated output, 0.54 volts
Clamping factor. 17.1 to 290 ; stereo output
impedances, 4. 8, 16. and 32 ohms ; controls.
input level ; switches, on -off, stereo -mono, balance; weight. 39 Ills ; dimensions, /4" wide,
81/4" high, 9" deep ; price, $69.95 kit. Accessories, metal cover. $6.50. Allied Radio Corporation, 100 N. Western Ave., Chicago S0, III.
;
LAFAYETTE
ohms; controls, level set ch.
16
1, level set
ch 2, bias do bal. ch. 1, dc bat. ch. 2; switches,
on-off ; convenience outlets, 2; weight 40 lbs;
dimensions, 15" wide, 6" high, 11" deep;
price, $1.t).50 assembled, $99.50 kit. Accessories. matching metal enclosure, E -8, $4.50.
Electronic Instrument Co., Inc. 3300 North-
KT -550 100 -Watt Stereo Amplifier Kit. An
unusually high- quality high- powered amplifier
utilizing military construction techniques.
The kit is easy to assemble and contains bias
and balancing provisions.
Specifications: Tube complement (2) 7199,
(4) 6550, (2) 0234; freq. reap. 4 to 65k cps
±1 db at 10 watts output ; power bandwidth,
19 to 25k cps ; IIiFM music power output
6:1 watts per channel; power output, rms,
60 watts per channel: harmonic distortion.
0.5% at 65 watts from 20 to 20k cps; IM
distortion, 0.5% at 72 watts; hum and noise,
90 db below 1 watt output ; sensitivity, input
for rated output, 1.5 or 2.5 volts ; damping
factor, 16.1 ; output impedances, 4, 8, 16 ohms;
controls, bias adjust with built in meter;
switches, on /off, sensitirity, subsonic filter;
convenience outlets, 1 ; dimensions,/5" wide,
61,6" high, 111/2" deep ; price, $169.95 kit.
Accessories, corer $19.95. II. H. Scott, Inc.,
111 I'owdermlll Road, Maynard, Mass.
Specifications: Tube complement (4) 7027A,
(4) 6CL6, (2) 6ßRSA (5) silicon diodes;
freq. resp. 14 to 45.000 cps + 0. - 1 db at 50
watts output; power output, rms, 50 watts
per channel ; harmonic distortion, 0.75% at
50 watts from 20 to 20,000 cps; IM distortion,
0.5% at 50 watts ; hum and noise, 90 db
below 50 watts output ; sensitivity, input for
rated output, 1 volt ; damping factor, 15 ; output impedances, 4, 8, 16 ohms; controls, bias
and high -power balancing; switches, on -off ;
convenience outlets, 1; weight, 60 lbs ; dimensions, 17" wide, 81/2" high, 121/2" deep. Price,
$184.50 assembled, $134.50 kit. Lafayette
Radio Electronics, 111 Jericho Turnpike, Syosset, L. I., N. Y.
PREAMPLIFIERS
ern Blvd. L.I.C., N. Y.
1.
2.
HF -87 70 -w
HF -86 28 -w
stereo amp kit
stereo amp kit
$74.95
43.95
HARMAN -KARDON
Citation II, 120 -watt Stereo Power Amplifier Kit. The Citation II is the top of the
Harman- Kardon kit line insofar as power
amplifiers are concerned. It offers sufficient
power (undistorted) to drive any inefficient
speaker extant and in addition it can handle
the full dynamic range of a symphony orchestra.
Specifications: Tube complement, (4) 6550,
(6) 121íY7.4. Freq. resp. 2 to 80,000 cps ± 0.5
db at 1 watt output ; power bandwidth, 18 to
40,000 cps; power output, rms, 60 watts per
channel; harmonic distortion, 0.3% at 60
watts from 20 to 20,000 elm; IM distortion,
0.3% at 60 watts; ham and noise, 90 db below 60 -watt output ; sensitivity, input for
rated output, 1.5 volts ; damping factor, 18+;
output impedances, 4. 8, and 16 ohms; controls, a.c. balance, bias adjust switches, bias,
a.c. balance selector; convenience outlets, 1,
weight, 60 lbs; dimensions, 16%" wide, 9"
;
high, 111/2" deep. Price, $229.95 assembled,
$159.95 kit. Accessories, ACII metal enclosure,
$7.95. IIarman- Kardon, Inc., Plainview, N. Y.
1. Citation V, 80 -w ster pwr amp kit ..$119.95
2. Citation V, 80 -w ster pwr amp wired. 179.95
KNIGHT -KIT
KR -85 70 -watt Stereo Amplifier Kit. A basic
stereo amplifier featuring 35 db of negative
feedback per channel, a heavy chrome -plated
Y
a and two printed
Anted circuit beards
boards for
easy assembly.
Specifications: Tube complement, (2) EF86,
(4) R1,. . (1) OZ.14, (2) FCC83 : freq. resp.
/5 to 31,000 cps ± 0.5 db at 70 watts output ;
power bandwidth, 15 to 31,000 cps; power output, rms, 35 watts per channel ; harmonic distortion, 0.5% at 70 watts from 30 to 31,000
cps; IM distortion. 0.59 at 70 watts; hum
1
AUDIO
REALISTIC
HK -210 140 -Watt Stereo Power Amplifier
Kit. The IIK 210 is n high- powered high -quality basic amplifier utilizing the well -known
Aero output transformers. Incorporating
printed circuits, it is exceptionally easy to
construct and provides performance equal to
the laboratory model. Claimed to be the first
commercially available amplifier which combines ultra-linear operation with hybrid feedback for unusually low distortion and high
stability.
Specifications: Tube /transistor complement
(I) selenint. reel., (.l) silicon diodes (4)
KT -77, (2) 12.4U7, (2) 12AX7 ; Freq. Reap. 5
to 140k cps. 0.5 db at I watt output ; power
bandwidth, 20 to 40k cps: IIIFM music power
output, 76 watts per channel ; power output,
rms, 70 watts per channel ; harmonic distortion, 1% at 70 watts from 20 to 20k cps ; IM
distortion, 1% at 70 watts; burn and noise,
75 db below I watt output ; sensitivity, input
for rated output. 1.5 volts damping factor. 15
output impedances, 4, 8, 16 ohms ; controls.
meter selector, damping factor, bias balance,
drive balance: switches, On -Off, variable
damping on -off: weight 50 lbs : dimensions,
11" wide. 7" high. 101,4" deep : price. $179.95
assembled. $I29.9.5 kit. Radio Shack Corp., 730
t'onuuotlwealth Ave., Boston 17, Mass.
AUGUST, 1962
FISHER
Model 400 -CK Stereo Preamplifier. Designed
to meet every possible audio control requirement, the 400 -CX has twenty -eight controls
and eighteen inputs, all simply arranged so
that even a novice can operate them easily.
The full -range stereo dimension control
widens or narrows the apparent acoustic distance between stereo speakers. Jewel light
system, visible from any listening position,
indicates exact setting of mode selector
switch. Center-channel output is provided for
the connection of an additional amplifier and
speaker to improve stereo sound distribution.
Specifications: Inputs 4 phono, 2 mi r.2
2
tupe head, 2 tuner, 2 tape amp., 2 aux.
aux. Il controls; Balance, Bass and Treble,
Stereo Dimensions. ('cider I'ol. Master Vol.;
switches : Lo -Ni Filter, Phase, Mono- Stereo,
5 Selector ¡hash Buttons: outputs: main, 30
ohms, 10 nota. volts; recording 5000 ohms,
2.5 volts freq. resp. 20 to 20,000 cps ± 0.5
is distortion, 0.15%
db at 2 volts; ha
at 2 volts front 20 to 20,000 cps; sensi:
I
;
;
31
AmericanRadioHistory.Com
tivity, Input for
1
volt output, phono, 1.4
mv tuner, 0.1 volts; huer and noise. 75 db
below 1 volt output. Tube complement,
(4)7247, (1)EZ80, (5)12.4t7/ECC83; weight,
18 lbs; dimensions, 151" wide, 4 13/16" high,
12" deep. Price, $199.50. Accessories: Cabinet
-Wood (10 -L')
0*
$24.95;
Metal in sin).
leather (MC -2) 61 $15.95. Fisher Radio Corp.,
21-21 44th Drive, L.L('.. N. V.
and other construction techniques common to
Mar,uatz products.
Specifications: Inputs: mike, phono 1 and 2,
tape head, Fil- AM, FM- mpx,TI' our controls;
mode. selector, vol., balance, treble, bass ;
switches: on -off, ici and low cut, boost, tape
monitor, record equal. ; outputs: main, cathode
follower, 100k and above (load), 10 nmx. volts ;
amplifiers for stereo although it can operate
with only one for mono.
Specifications: Inputs: (2) phono, tape,
(2) tuner, mie ; controls: On- Volume, balance,
treble, bass, filter slope, filter range ; switches:
stereo, mono, radio, mie, disc. tape ; outputs;
mein. 0.25 meg ohms, 1.4 max. volts : recording, 0.25 meg ohms, 0.25 volts; freq. resp. 20
to 20k cps ± r,[. db at 1.4 volts; harmonic distortion, 0.02% at 1.4 volts from 20 to 20k
cps; IM distortion, 0.1% at 1.4 volts ; sensitivity. input for 1 volt output, phono 4 mv,
tuner, 0.25 volts; hum and noise, 70 db below
1 volt output. Tube complement, (2) EF86.
(2) ECC83 ; weight, 6 los; dimensions. 10l/."
wide, 31/i" high, 5 1/16" deep. Price, $150.00.
Lectronics of City Line ('enter. 7644 City Lime
Ave., Philadelphia, I'a.
freq. resp. 20 to 20k cps ± 0.5 die at 10 volts;
IM distortion, 0.01% at 2 volts; sensitivity,
input for 1 volt output, phono 0.6 mv tuner,
0.075 volts ; hum and noise, 80 db below 10
mv on phono and hum below thermal noise.
Tube complement. (6) ECC83/12X.47 : weight,
20 lbs; dimensions. 14%" wide, 5%" high,
8 Ir," deep. Price. 5264.00 assembled. Accessories: wooden cabinet for above $24.00.
I:u-antz Company, '2:-. It Broadway, L.I.C.,
Series M61
Transistorised Stereo Preamplifier. Compact, rugged. transistorized
unit with choice of a.c. line or battery power
supply. Unique design permits extreme flleaibility of installation and use-can be mounted
in vertical or upright position or upside
down. Slide- selector switch offers three equalization inputs: (1) "phono" for conversion
of ceramic phono inputs for use with magnetic cartridges ; (2) "tape" for equalization
of tape playback directly from tape head
:
LAFAYETTE
L.4- 600.4 Stereo l'reamp(ilien The L.-600:1
is a "no- compromise" presto') with twelve in-
put jacks (six pairs) for program sources of
any type or level.
Specifications: Inputs, mag. phono. ceramic
phono. tape head, tuner, aux; controls-rolloff, turnover, 2 pair bass and treble, bridge;
switches- on -off. tape monitor, rumble filter,
scratch Jillrr prr..rner, loudness, function;
N V.
SHURE
-1-
McINTOSH
outputs -main.
max. volts ; recording, 2700 ohms. 2 volts ; freq. resit. 5 to
40,000 cps ± 1 db ; harmonic distortion, 0.1%
at 2 volts from 30 to 15,000 cps ; IM distor1.500
ohms,
.)
tion, .05 %n at 2 volts ; sensitivity, input for
1 -volt output-phono, 2.2 mv, tuner, 0.094
volts ; hum and noise, RO db below 2 -volt output; tube complement, (7), 7025, (2) selenium rectifiers weight, 16 lbs ; dimensions,
1.y" wide, 4- 13/16" high, 111/2" deep. Price,
$134..50 assembled. $79.50 kit. Lafayette Electronics. III Jericho Turnpike, Syosset, L.i.,
;
!
CII Stereo Preamplifier. This preamplifier puts precision sound control at your
fingertips, and increases the usefulness and
enjoyment of any stereo system. Among its
many features are: illuminated panel for important controls, simple rocker -action switches
for secondary controls; floating panel for low level inputs with single ground point to prevent Induced hune loops from associated equipment ; and shielding against T\' and r.f. interference.
a
N.Y.
LEAK
"Point One" Stereo Preamp. Impressive
new styling enhances the appearance of the
latest version of the well -known Leak "Point
One" stereo preamplifier. Decorator-designed,
the new front panel offers changeable color
panels for both faceplate and knobs. enabling
the user to match the decor of any room. The
new escutcheon plate is interchangeable with
the present one, permitting present owners
the option of inexpensive conversion to the
new styling. The "Point One" includes provisions for playing stereo, stereo reverse, left
channel only, right channel only, and monophonically.
Specifications: Inputs: Aux, tape. tuner (2),
(2), tape head, tape mon, mie;
controls: selector. mode, volume, balance, 2
bass, 2 treble; switches: rec compensator, tape
non, reverse, power, rumble, scratch, loudness; outputs main, 2.5 max. volts ; recording, 0.25 volts ; freq. resp. 20 to 20,000 cps
± 0.5 db ; total distortion, less than .05% nt 3
volts from 20 to 20,000 cps sensitivity, input for 2.5 -volt output, phono, 2 mv, tuner,
0.25 volts; hunt and noise, less than 1.5 uy
input noise level ; weight, 15 lbs ; dimensions,
15%" wide, 5%" high, 12" deep. Price,
$229.50. McIntosh Laboratory, Inc., 2 Chambers St., Binghamton, N. Y.
phono
:
through hi -fl control preamplifier and (3)
"microphone" for flat amplification wherever
a boost in microphone output is required.
Specifications: Inputs: phono, tape, microphone ; controls: None ; switches : on-off positions; freq. resp. 25 to 15,000 cps ± 21/2 db;
hum and noise, 50 db below 1 volt output
weight, 114 lbs ; dimensions, 51/4" wide, 2"
high. 51/4" deep. frier, $27.50. Shure Bros.,
222 Flartrey Ave.. Evanston, Ill.
1.
2.
3.
M61 -3, same as above, with 30 -volt
battery supply
M65, stereo conversion preamplifier
M60, stereo line preamplifier
$26.50
24.00
19.95
;
QUAD
PREAMPLIFIER
KITS
QUAD 22 Stereo Control. The QUAD 22
Specifications: Inputs: records, tape, mike,
tuner, tape head ; controls: bass, treble, balance, volume, rumble, filter; switches: Junction (5 position), input; freq. resp. 20 to 20k
cps ; harmonic distortion 0.01% at 125 mv;
IM distortion 0.01% nt 125 mv ; sensitivity,
input for 125 mv output, phono .t.5 nrv, tuner,
35 mv ; hum and noise, 60 db below 1 volt
output. Tube complement (4)EF86; weight
5% lbs ; dimensions: /01/2" wide, .1%" high,
5" deep. Price $119.50. Ercona Corp., 16 W.
46th St., New York, N. Y.
control unit features pushbuttons for selection
of equalization or mode. The other front panel
controls, in conjunction with the pushbuttons.
provide all the controls and flexibility necessary to operate a modern stereo system.
Plug -in units are available to match most
available cartridges. The QUAD 22 is designed to operate with two QUAD II power
DYNACO
PAS -2 Stereo Preamplifier Control Unit.
Includes preassembled etched circuit boards
for maximum reliability and ease of construction. Complete feedback design, virtually incapable of overload.
MARANTZ
Model 7C Stereo Control Unit. The Model
7C is a stereo control center with sufcient
built -in flexibility to make it "up -to- date" for
a long time to come. In addition it is built to
last that long, using the professional cabling
AUDIO
32
AmericanRadioHistory.Com
AUGUST, 1962
Specifications: Inputs : tape head, phono,
FM-AM, FM -MPX, apare. Special controls:
selector, volume, balance, blend, bass, treble;
switches : tape monitor, loudness, scratch, onoff ; outputs: main, 5000 ohms, 4 max. volte;
recording same as source, 0.4 volts ; freq. resp.
10 to 40k cps + 0.5 db at 2 volts ; harmonic
distortion, 0.02% at 2 volts from 20 to 20k
cps ; IM distortion, 0.05% at 2 volts ; sensitivity, input for 1 volt output, phono 1 mv,
tuner, 0.1 volts ; hum and noise, 70 db below
10 mv phono input. Tube complement (4)
12AX7, 12X4, selenium rectifier; weight 10
lbs ; dimensions, 13" wide, 4" high, 8" deep.
Price, $99.95 assembled, $59.95 kit, including
cover. Accessories : PM -3 panel mount kit,
$4.95. PK -30 deluxe panel kit with knobs,
813.95. Dynaco, Inc., 3912 Powelton Ave.,
Philadelphia, Pa.
$ 34.95
1. PAM -i mono preamplifier kit
2. Above, wired
59.95
EICO
Stereo Preamplifier Kit. For all functhe ST 84 all types of distortion are
0.05% at all levels. This is true not
average input levels and when tone
controls are set close to flat, but also at peak
input levels and when tone controls are set
at extreme positions.
ST 84
tions of
down to
only at
Specifications: Inputs : mag ph a, mag ph r,
tape hd, mic, tuner (3) ame; controls : level,
balance, bass chan 1, bass chan 2, treble chan
1, treble chan 2 ; switches : Input, mode, tape
mon, loudness, scratch filter, rumble filter ;
tape speed equal ; outputs : main 8 k ohms,
4 max. volts ; recording. 1400 ohms, 4 volts;
freq. resp. 5 to 25 k cps ± 0.3 db at 2 volts ;
harmonic distortion, 0.05% at 2 volts from 20
to 20k cps ; IM distortion 0.04% at 2 volts ;
sensitivity, input for 1 volt output, phono 1.6
mv. tuner, 0.17 volts ; hum and noise 70 db
below 1 volt output. Tube complement, (5)
ECC83 /12AX7, (1) 6X4: weight, 8% lbs; di-
mensions, 157,x" wide, 51/2" high, 83" deep.
Price $89.95 assembled, $59.95 kit. Electronic
Instrument Co., Inc., 3300 Northern Blvd.,
L.I.C., N. Y.
1. HF 85 stereo preamp
$39.95
HARMAN -KARDON
Citation I, Stereophonic Control Preampli-
fier Kit. A professional quality preamp kit
with full facilities to handle about any combination of signal sources and program ma-
terial.
Specifications: Stereo inputs -aux, tape,
amp, tuner, phono 1, phono 2, tape head; con trols-4 stepped tone controls, blend, rolloff,
turnover, loudness, balance, mode, function,
and low-cut ; switches- contour, phasing, tape
mon., stereo reverse, power push button ; outputs, main, 1500 ohms, 15 max. volts ; recording, 1.500 ohms, 0.5 volts ; freq. resp. 5 to
80,000 cps ± 0.5 db at 2 volts ; harmonic distortion, 0.05% at 2 volts from 20 to 20,000
cps; IM distortion, 0.2% at 2.0 volts ; sensitivity, input for 1 -volt output, phono, 2.5 mv,
tuner, 0.5 volts ; hum and noise, 85 db below
AUDIO
rated output. Tube complement, (4) 12A%7,
(5) 12ÁT7, (6) silicon diodes weight, 32 lbs;
dimensions, 14%" wide, 6" high, 1214" deep.
Price, $249.95 assembled, $159.95 kit. Harman ;
Kardon, Inc., Plainview, N.
Y.
Citation IV, ster control preamp kit $119.95
2. Citation IV, ster control, preamp,
189.95
wired
249.95
3. Citation A, ster control preamp kit
1.
HEATH
Model AA -II Stereo Preamplifier Kit. Professional quality and clean -lined design. All
basic controls are in open view and all secondary controls used to set the initial conditions are hidden behind the hinged lower
front panel. Nine pushbutton input switches
select any of five stereo inputs, any of three
monophonic inputs, and an on-off switch. All
input and output Jacks are conveniently located on the rear chassis apron for easy
installation in any stereo system. A controlled-output derived center channel provides stereo center fill -in or mono power to
other rooms using an extra amplifier.
Specifications: Inputs, mono -AM, FM, aux ;
stereo -phono, tape head mic, mpx, aux ; controls, bass, treble, blend, volume, input level,
balance; switches, scratch filter, rumble filter,
stereo -mono. channel reverse, phase reverse,
volume -loudness, 8 input selectors ; outputs,
main, 1800 ohms, 2.5 max. volts ; recording,
1800 ohms, 0.5 volts ; freq. resp. 20 to
20,000 cps t 0.5 db at 2.5 volts ; harmonic
distortion, 0.05% at 2.5 volts from 20 to
20,000 cps ; IM distortion, 0.09% at 2.5 volts;
sensitivity, input for 2.5 -volt output -phono,
2.5 mv, tuner, 0.1 volts : hum and noise, 65
db below 2.5 -volt output. Tube complement,
(8) 12AX7, (2) I2AT7 ; weight, 19 lbs;
dimensions, 15%" wide, 51/2" high, 111%
deep. Price, $84.95 kit. Heath Company,
Benton Harbor, Mich.
$ 34.95
1. AA -141 ster preamp kit
KNIGHT -KIT
KP -50 Stereo l'reamp Kit. A complete and
compact stereo preamp utilizing d.c. on filaments and incorporating six equalization positions to permit handling older LP's. Dual concentric clutch -type controls are used for
bass, treble, and level controls.
Specifications: Inputs-mag phono, ceramic
phono, tape head, tuner, aux; controls -bass,
treble, level, loudness ; switches- selector,
mode, rumble filter, scratch filter, on -off,
treble ; outputs -main, 600 ohms, 3 volts ; recording, 10 megohms ; freq. resp., 7 to 120,000
cps ± 0.5 db at I volt ; harmonic distortion,
less than 0.25% at 1 volt from 20 to 20,000
cps ; IM distortion, 0.7% at 1 volt ; sensitivity,
input for 1 -volt output, phono, 2.5 mv ; tuner,
0.15 volts ; hum and noise, 80 db below 1 -volt
output. Tube complement, (2) 12dY7, (4)
E'CC82 /12AU7, (2) selenium rectifiers ; weight,
14 lbs ; dimensions, 1314" wide, 4%4" high,
7%" deep. Price, $59.95 kit. Allied Radio
Corporation, 100 N. Western Ave., Chicago 80,
Ill.
R-A-E
Model 400, Stereo -Mono Preamplifier Kit. A
new high -quality preamp kit with many advanced features. Designed as a kit, the Model
400 features easy assembly and excellent per-
formance.
Specifications: Inputs : mikes, phono high,
phono low, tape ; FM ; controls: AM -TV,
switches : stereo, stereo reverse, Channel A,
Channel B, outputs : main, 0.1 megohms,
1 max. volts ; recording, 0.1 megohms ; 0.5
volts ; freq. resp. 30 to 30,000 cps ± 1 db at
0.4 volts ; harmonic distortion, 0.5% at 0.4
volts ; IM distortion, 0.4% at 0.4 volts. Tube
complement, (6) 12AX7 : weight, 8 lbs; dimensions. 8" wide, 8%" high, 11" deep. Price,
$97.50. kit. R-A -E Equipment, Inc., Central
Bank Bldg., Great Barrington, Mass.
REALISTIC
HK -212 Stereo Preamplifier Kit. An easy -toassemble stereo preamp kit with 14 panel controls plus stereo tape recorder and headphone
Jacks. Printed circuit construction.
Specifications: Inputs : tape head, phono 1,
phono 2, tuner (2) sua ; controls volume, balance, (2) treble, (2) bass, 3rd channel output
lever ; switches : input set., function, tape
monitor, rumble, scratch, loudness, phase;
outputs : main, 5k ohms, 30 max. volts ; recording 20k ohms, 1 volt; freq. reap. 10 to 60k
cps ± 1 db at 1 volt ; harmonic distortion,
0.05% at 1.5 volts from 20 to 20k cps ; IM
distortion, 0.05% at 1.5 volts sensitivity, input for 1.5 volt output, phono 2 mv, tuner,
0.35 volts ; hum and noise, 60 db below 1 volt
output. Tube complement, (4) 12AX7 (1)
6X4 weight, 15 lbs; dimensions, 15%" wide,
5%" high, 6 %" deep. Price $99.95 assembled,
$69.95 kit. Radio Shack, 730 Commonwealth
Ave., Boston, Mass.
H. H. SCOTT
LC -21 Stereo Control Center Kit. Distortion is below the limits of even the finest
test equipment. Hum is completely inaudible
even in the magnetic positions due to the all aluminum chassis, shielded power supply, and
d.c.-heated tubes. The LC -21 can be used for
laboratory applications where frequency response below 10 cps Is desired. Among the
16 front panel controls are complete tape
monitor switching facilities, front panel "derived" center channel level control, and phasereverse switch. The LC -21 is an ideal companion to the LK-150 stereo power amplifier
kit.
Specifications: Inputs : mag Hi, mag Lo,
tape, extra, tuner, mike; controls : bass,
treble, balance, volume, center chan. level;
switches ; input selector, stereo selector,
rumble, scratch, monitor, loudness, phase;
outputs : main, 100k ohms, 10 max. volts; recording, 0.5 volts ; freq. resp. 10 to 55 cps ± 1.0
db at 2.5 volts; harmonic distortion, 0.1%
at 2.5 volts from 20 to 20k cps ; IM distortion, 0.1% at 2.5 volts; sensitivity, input
for rated output, phono, 0.3 mv, tuner, 0.5
volts ; hum and noise, 85 db below 1 volt.
Tube complement, (6) 12AX7, (1) 6X4;
weight, 13 lbs; dimensions, 15%" wide, 5%"
high, 13%," deep. $99.95 kit. Accessories:
cases in various woods and metal from $13.95.
H. H. Scott, Inc., 111 Powdermill Road, Maynard, Mass.
33
AUGUST, 1962
AmericanRadioHistory.Com
INTEGRATED AMPLIFIERS
ties, stereo headphone jack, stereo indicator
light, 3rd channel output. Bogen Communication Div., Lear Siegler, Inc., Paramus, N. J.
1.
AP30 Stereo Amplifier
$99.95
ALTEC
ERIC
Stereo Amplifier-Preamplifier. The AltecLansing Model 353 -A, is a complete amplifying system, embodying two 25 -watt stereo
channels which may be combined for 50 -watt
monophonic operation when desired. Among
its features is a matrixing network for
"three- channel" stereo. Circuitry includes
feedback-type equalization plus feedback
around all tubes for minimum distortion. All
low -level tubes have d.c. on heaters. Fourteen inputs include two each for magnetic
cartridge, ceramic cartridge, tape head, tape
recorder, tuner, microphone, and multiplex.
"Dual Twenty" Amplifier Model 3160T.
This all -new Eric Stereo Amplifier is a masterpiece of performance and design. It features
a transistorized preamplifier for magnetic cartridges to eliminate hum and microphonics,
along with the normal complement of tone,
loudness, and balance controls. Phono equalization compensates for RIAA, EUR, and LP
records.
Specifications: Tube/transistor complement
(2) 12AX7, (2) 7247, (4) 6BQ5, (1) 6234,
(2) 2N448. Freq. resp. 20 to 20,000 cps ± 1
db at 1 watts output ; power output, rms, 20
watts per channel ; harmonic distortion, 1%n
at 20 watts ; IM distortion, 0.4 % at 17 watts ;
hum and noise, 70 db below rated output ;
sensitivity, input for rated output -phono,
2.0 mv, tuner, 0.5 volts ; output impedances,
4, 8, 16 ohms ; inputs -2 phono, 2 tape amp,
2 aux, 2 tuner; weight, 17 lbs. Dimensions,
13 %a" wide, 4 5/16" high, 11" deep. Price
$106.20. Eric Electronics Corp., 1823 Colorado
Ave., Santa Monica, Calif.
"Dual Ten" Model 3460P, 10 /10 -w
$ 79.95
amp
149.95
2. Model 3560T, 25/25 -w amp
69.95
3. Model 3459T, 17 -w mono amp
1.
Specifications: Tube complement (5) 12AX7,
(4) 6L60C ; freq. resp. 20 to 20,000 cps +1
at 25 watts output ; power output, rms,
25 watts per channel ; harmonic distortion,
1% at 20 watts from SO to 15,000 cps ; hum
and noise, 82 db below rated output ; sensitivity, input for rated output-phono, 2.5
mv, tuner, 0.29 volts ; damping factor, 4 ;
output impedances, 4, 8, 16 ohms ; inputs
4 phono, t tape head, 2 tape amp, 2 radio, 2
mie, t mpx ; weight, 35 lbs. Dimensions, 15'
wide, 57/s" high, 11I/4" deep. Price, $225.00.
Altee Lansing Corp., 1515 S. Manchester
Ave., Anaheim, Calif.
BELL
Model 2440 44 -watt Stereo Amplifier System. This compact unit offers all the features
anyone needs for the home reproduction of
music from a wide variety of sources.
Specifications: Freq. resp. 20 to 20,000 cps
± 1 db at 1 watts output ; power bandwidth,
35 to 20,000 cps; IHFM music power output,
22 watts per channel ; power output, rms, 20
watts per channel ; harmonic distortion, 1%
at 20 watts from 50 to 15,000 cps ; IM distortion, 1% at 20 watts; hum and noise, 63
db below 1 watt output ; sensitivity, input for
rated output-phono, S mv, tuner, 0.1 volts ;
damping factor 4 ; output impedances, 4, 8,
16 ohms and high Z for recorder ; inputs
phono, 2 tape head, 2 tape amp, 2 aux. 2 ceramic phono ; weight, 28 lbs. Dimensions:
17 3/16" wide, 5 7/16" high, 10%" deep.
Bell Sound Division, Thompson Ramo Wooldridge, Inc., 6325 Huntley Rd., Columbus, Ohio.
-4
BOGEN
AP250 Stereo Amplifier. This unit offers
control flexibility for stereo and mono sound
sources. 50 -watt output (25 per channel).
Special blend control light indicates maximum or minimum stereo balance. New, special
front -end tubes keep noise and hum at an unusually low level. The AP250, as all Bogen
hi-fl stereo components, is finished in brushed
gold.
Specifications: Tube/transistor complement
10 tubes plus 2 silicon rectifiera and 1 selenium rectifier ; Freq. resp. 20 to 30,000 cps
± 1 db at 2.5 watts output ; power bandwidth,
50 to 15,000 cps ; IHFM music power output,
25 watts per channel ; power output, rms 22
watts per channel ; harmonic distortion, 0.6%
at rated output ; IM distortion 0.3% at 2.5
watts; hum and noise, 50 db below 1 watt;
output sensitivity, input for rated output
phono, 4.5 mv, tuner, 0.5 volts ; output impedances, 4, 8, 16 ohms ; inputs
set phono,
1 set tape head, 1 set aux, I set tuner ; weight,
20 lbs. Dimensions, 15" wide, 4%" high, 115ú'
deep. Price $154.95. Accessories : EN -9 metal
enclosure $11.95; WE -9 walnut cabinet
$26.95. Other features : tape monitor facili-
-1
-
30
;
-
aux ; weight, 27 lbs. Dimensions 14" wide,
4 %" high, 11" deep. Price, $199.95 assembled ; accessories, cover, $7.50. Precision Electronics, Inc., 9101 King St., Franklin Park, Ill.
$129.95
1. 36PG, dual 20 -w amp
89.95
2. 24PG, dual 12 -w amp
HARMAN -KARDON
Award Amplifier, Model A500. An integrated
amplifier with complete flexibility to handle
the full variety of program sources required
of the modern system. l'ower output is sufficient to handle even an inefficient speaker
system.
FISHER
db
-
I'
at
SO to 15,ou0 cps; 1M distortion,
watts hum and noise, 66 db below 1 watt
for
rated
output
output ; sensitivity, input
phono, 3 mv, tuner, .25 volts; damping factor 10 ; output impedances, 4, 8, 16 ohms ; inputs-; Mag phono, 1 tape head, 1 tuner, 1
from
Model X-101 -C 60 -Watt Integrated Stereo
Amplifier. Featuring design for simplicity of
operation, the new Fisher X -101 -C has all
controls which are not commonly used behind
a handsome panel, thus allowing even the
uninitiated to operate this control center without confusing them with the large variety of
controls.
Specifications: Tube complement 10 tubes,
silicon rect. ; Freq. resp. 20 to 20,000 cps.
± 1 db at 1 watts output ; power bandwidth,
16 to 30,000 cps ; IHFM music power output,
30 watts per channel ; power output, rms, 27
watts per channel; harmonic distortion, 0.5%
at 27 watts at 1 kc IM distortion, 0.8% at
30 watts ; hum and noise, 88 db below full
output; sensitivity, input for rated output
phono 3.5 mv, tuner 0.3 volts ; damping factor
10 ; output impedance 4, 8, 16 ohms ; inputs;
-
phono, 2 tape head, 2 tape amp, t aux, 2
;
weight 24 lbs. Dimensions : 151/2"
wide, 4 13/16" high, 121/2" deep. Price
$199.50. Fisher Radio Corp., 21 -21 44th Drive,
L.I.C., N. Y.
1. X- 100 -B, ster audio control w. 50 -w
$169.50
ster ramp
2. X- 202 -B, ster audio control w. 80 -w
249.50
ster amp
3. X -1000, ster audio control w. 110 -w
339.50
ster amp
tuner
Specifications: Tube complement, (4) 7355,
(1) 12AU7, (4) 12AX7. Freq. resp. 12 to
70,000 cps ±1 db at 1 watt output; power
bandwidth, 20 to 20,000 cps ; IHFM music
power output, 25 watts per channel ; power
output, rms, 20 watts per channel ; harmonic
distortion, 0.5% at 20 watts from 20 to
20,000 cps ; 1M distortion, 0.5% at 20 watts;
hum and noise, 85 db below rated output;
sensitivity, input for rated output -phono,
1.5 mv, tuner, 0.25 volts ; damping factor
10 +; output impedances, 4, 8, and 16 ohms;
inputs -4 phono, 2 tape head, 2 tape amp, 2
aux ; weight, 32 lbs. Dimensions, 151/2" wide,
deep. Price, $159.95 as5 7/16" high, 12"
sembled. Accessories, WW50 cabinet, $29.95 ;
CX50 cage, $12.95. Harman -Kardon, Inc.,
Plainview, N. Y.
$ 99.95
1. A300, AWARD 30 -w ster amp
49.95
2. A10, mono 10 -w amp
OMEGA
Model 1600 All Transistor Integrated Stereo
Amplifier. Embodying many fine features,
as well as being transistorized, the Model
1600 is designed to operate in the finest
audio systems. Some of the features include
a patented bridge output circuit which delivers more power into the load ; a system
of balancing the volume, bass, and treble
of the two stereo channels so that only one
master control need be used thenceforth.
In addition, the Model 1600 is extremely handsome in appearance.
GROMMES
Model 70PG Integrated Amplifier. New com-
pact high powered stereo amplifier with 70
watts of music power and featuring new RCA
7868 power tubes, silicon power supply and
voltage regulation. Wide-range bass and treble
controls, feedback loops for each stage and
oversize output transformers result in clean,
distortion -free sound. Provision for center channel speaker.
Specifications: Tube /transistor complement
6.6EÚ7, 4 -7868, 1 -7868 regulator, 5- silicon rectifiera. Freq. resp. 20 to 20,000 cps ±.5 db at
1 watt output ; power bandwidth, 30 to 20,000
cps; IHFM music power output, 35 watts per
channel, power output, rms, SO watts per
channel; harmonic distortion, 2% at 30 watts
Specifications: Transistor complement 31
7 diodes ; Freq .'esp. 18 to 20 k
cps ± 0.3 db at 30 watts output per channel ;
power bandwidth, 18 to 20 k cps ; IHFM music
power output, 30 watts per channel ; power
output, rms, 25 watts per channel ; harmonic
distortion, 1% at 30 watts at 1 ko ; IM dis-
transistors,
AUDIO
34
AmericanRadioHistory.Com
AUGUST, 1962
tortion, 1% at 30 watts ; hum and noise, 75
db below rated output ; sensitivity, input
for rated output -phono, 4 mv, tuner, 0.3
volte ; output impedance, 8, 16 ohms ; inputs
4 phono, t tape head, t tape amp, t aux, t
TV ; weight, 12 lbs. Dimensions : 15%" wide,
3" high, 9" deep. Price, i249.00. Omega Electronics Corp., 10017 North 19th Ave., Phoenix
21, Arizona.
-
PILOT
Model 240, 30 -Watt Integrated Stereo Amplifier. This rugged, extremely versatile component is one of the most popular instruments
Pilot has ever offered. The five pairs of stereo
inputs can accommodate virtually every
source of stereo music. Eleven front panel
controls assure complete operational flexibility.
The instrument even has a speaker selector
for control of extension speakers in other
rooms. In addition to the usual speaker outputs, the 240 has a special pair of outputs for
connecting to a center speaker, for three -
speaker stereo, or for monophonic listening
in another room.
(2)
Specifications: Tube complement
ECC83, (2) ECC81, (1) EC082, (2) 7199, (4)
7189, (6) silicon rectifiera ; Freq. resp. 20
to 30,000 cps ± 1 db ; IHFM music power output, 30 watts per channel ; harmonic distortion, 0.8% at rated output ; IM distortion,
1.2% ; hum and noise, 75 db below 1 watt ;
output impedances, 4, 8, 16 ohms ; dimensions :
13%" wide, 11" high, 9" deep. Price. $169.95.
RAVENSWOOD, Edgewood & McGuckian
Ste., Annapolis. Md.
$139.95
1. CCP -600 20/20 -w int amp
H. H. SCOTT
299 -C Compiete Stereo Amplifier. Features
include: rugged 80-watt output stage assur-
ing low -distortion reproduction of even the
lowest frequencies : special signal lights make
it easy for any number of the family to operate the system ; stereo selector switch for
choosing stereo or monophonic program
sources; separate scratch and rumble filters;
front panel stereo headphone output ; and
"derived" center -channel level control.
Specifications: Tube complement (4) EL84,
(2) 7025/12.4X7, (3) 12AX7, (1) GZ34;
Freq. resp. 10 to 30,000 cps ± 1 db at 1 watts
output ; power bandwidth, 50 to 10,000 cps ;
IHFM music power output, 15 watts per
channel ; power output, rms, 12 watts per
channel ; harmonic distortion 1% from 70
to 8000 cps ; IM distortion, t% at 8 watts;
hum and noise, 70 db below 1 watt output ;
sensitivity, input for rated output -phono, 3
mv, tuner, 0.1 volts; damping factor 4; output impedances, 4, 8, 16 ohms ; inputs
phono, t tape head, t tape amp, MX, FM -AM ;
weight, 23 lbs. Dimensions, 14%" wide, 51/4"
high, 113/4" deep. Price, $134.50. Pilot Radio
Corp., 37 -06 36th St., L.I.C. 1, N. Y.
I. Model 230, 24 -watt stereo amplifier
-2
with cover
$
2. Model 246, 60-watt stereo amplifier
with cover
89.50
199.50
3. Model 248B, 74 -watt stereo amplifier
269.50
less cover
PIONEER
SM-801, Integrated Stereo Amplifier. The
newly announced Pioneer Model SM -801 is
a professional quality stereophonic amplifier
incorporating on one chassis two power amplifiers -each channel with a maximum rated
output of 45 watts-and two extremely sensitive and highly versatile preamplifiers. With
its high output, it is ideally suited for use
In large concert halls, auditoriums, or other
similar applications that call for a large
amount of driving power.
Specifications: Tube complement 10 tubes
4
diodes
;
Specifications: Tube complement 11 tubes;
freq. resp. 20 to 20k cps ± 1 db ; power bandwidth, 19 to 25k cps; IHFM music power
output, 40 watts per channel; power output, rms, 36 watts per channel ; harmonic
distortion, 0.8% from 20 to 20k cps; IM distortion, 0.5% ; hum and noise, 80 db below
watt output ; sensitivity, input for rated
output -phono, 3 mv, tuner, 0.5 volts ; damping factor 16 ; output impedance, 4, 8, 16
ohms ; inputs -5 phono, 1 tape head, 1 tape
amp, 1 aux, 1 Mie; weight, 30 lbs. Dimensions: 15%" wide, 5%" high, 1334" deep.
Price, $229.95. Accessories : wood and metal
cases, $13.75. H. H. Scott, Inc., 111 Powder mill Road, Maynard, Mass.
$169.95
1. 222 -C, 48 -watt stereo amp.
299.95
2. 296, 100 -watt
1
I. SM -C 800, 90 -w professional amp
RAVENSWOOD
Model CCP-700 Dual -30 Integrated Amplifier. A complete control center for the home
system, combined with a dual -30 -watt power
amplifier with adequate Inputs and control
facilities for the finest installations. Physical
configuration of the unit makes it possible
to mount in a variety of positions.
FISHER
Model EX -200 StrataKit 80 -watt Integrated
Stereo Amplifier. An easy building, high -
quality, integrated stereo amplifier kit. The
instructions are explicit and "marbled" with
humor.
Specifications: Tube complement 10 tubes,
4 silicon diodes ; Freq. resp. 20 to 20,000
cps ±1 db at 1 watt output ; power bandwidth, 16 to 28,000 cps ; IHFM music power
output, 40 watts per channel ; power output,
SHERWOOD
was designed to offer full power requirements
for most home music systems at economical
cost. Controls include friction -locked bass and
treble controls, scratch and rumble filters,
stereo normal /reverse switch, phase-invert
switch and tape- monitor switch. A total of 8
high -level and 4 low -level inputs are provided for maximum flexibility.
rms, 35 watts per channel ; harmonic distortion, 0.4% at 35 rms watts at 1 k cps ; IM
distortion, 0.8% at 35 rms watts per channel;
hum and noise, 90 db below full power output ; sensitivity, input for rated output
phono, 3.5 mv, tuner, .35 volts ; damping factor 10 ; output impedances, 4, 8, 16 ohms ;
phono, 2 tape head, 2 tape amp, t
inputs
aux, t tuners ; weight, 26 lbs. Dimensions,
1544" wide, 4 13/16" high, 12r/á" deep. Price,
$169.50 kit. Accessories : Cabinet 10 -U, $24.95,
MC -2, $15.95. Fisher Radio Corp., 21 -21 44th
-
-2
Freq. resp. 20 to 100,000 cps
watts per channel ; harmonic distortion, 1%
at 35 watts at 1 k cps ; IM distortion, 1% at
35 watts; hum and noise, ± 50 db below 1
watt output ; sensitivity, input for rated output- phono, 37 mv, tuner, 2.40 mv ; damping
factor 8; output impedance, 8, 16 ohms; inputs-7 phono, 2 tape head, 1 tape amp, 1
mic, 1 tuner ; weight, 34.2 lbs. Dimensions,
16%" wide, 5 11/16" high, 12 11/16" deep.
Pioneer Electronic Corp., 5 Otowacho, 6- chome,
Bunkyoku, Tokyo, Japan.
69.95
kit
S- 550011 64 -Wott Amplifier and Preamplifier. The S- 5500Ií features all the important
controls and facilities of the S- 5000íI and
± 1 db at 500 mw output ; power bandwidth,
20 to 100,000 cps ; IIIFM music power output,
45 watts per channel; power output, rms 35
AUDIO
1 watt output ; sensitivity, input
for rated output -phono 4 mv, tuner, 0.5
volts ; damping factor 11 ; output impedance,
4, 8, 16 ohms ; inputs
phono, 2 tape head,
2 tape amp, 4 aux. Dimensions, 15%" wide,
5%" high 15" deep. Price $149.95 assembled,
$99.95 kit, metal cover included. Electronic
Instrument Co., Inc., 330 Northern Blvd.,
L.I.C., N. Y.
1. ST -40 watt integrated stereo amp kit $79.95
2. HF -81, 28 -watt integrated stereo amp
-4
n
and
EICO
ST -70 Stereo Amplifier hit. The -.t -70 is
a complete stereophonic control center plus
two separate 35 -watt amplifiers all on one
chassis. Mode switches on front panels enable you to play either amplifier alone or use
both amplifiers together for normal stereo,
or for reverse stereo. It is also possible to
use both amplifiers together for enhanced
mono listening through two speaker systems.
Specifications: Tube complement (3)
ECC83 /12AX7, (2) 12DW7, (2) 6270TB,
(4) 7591, (1) 0Z34. Freq. Reap. 10 to 50k
cps ± 0.5 db at t watts output ; power bandwidth, 15 to 90,000 cps ; IHFM music power
output, 37.5 watts per channel ; power output,
rms, 35 watts per channel ; harmonic distortion 1% at 30 watts from 25 to 20k cps;
IM distortion, 1% at 70 watts; hum and noise
63 db below
El
VI
INTEGRATED
AMPLIFIER KITS
Specifications: Tube /transistor complement
(4) 7868, (5) 12AX7, (4) ail. rect. Freq.
db at 30 watts outresp. 20 to 20k cps ±
put ; IHFM music power output 32 watts per
channel power output, rms, 30 watts per
channel ; harmonic distortion, 1/2% at 30
watts from 26 to 20k cps ; IM distortion,
1%% at 32 watts ; hum and noise, 75 db
below 1 watt output ; sensitivity, input for
rated output -phono, 1.2 mv, tuner, 1/4 volts;
damping factor 5 ; output impedances, 4, 8, 16
phono, 2 tape head, 2 tape
ohms ; input
amp, 2 aux, 2 (other) ; weight, 27 lbs. Di3,11
-2
mensions 14" wide, 4" high, 131/1" deep.
Price, $164.50. Accessories: case, $7.50. Sherwood Electronic Labs, Inc., 4800 N. California Ave., Chicago 18, Ill.
1. S- 500011, 80 -watt amp -preamp ....$199.50
Drive, L.I.C., N. Y.
integrated amplifier
1. KX -100. 50 -w
$129.50
StrataKit
HARMAN -KARDON
Model A3OK 30 -watt Stereo Amplifier Kit.
An unusually well designed kit, the A3OK
features the most comprehensive and well
thought out construction procedure. The Instrument itself is equally well designed in
terms of performance.
Specifications: Tube complement, (4) 7408,
(4) 12AX7, (1) 12.4U7 ; freq. resp. 15 to
70,000 cps ±1 db at 1 watt output ; power
bandwidth, 30 to 20,000 cps; IHFM music
power output, 15 watts per channel ; power
output, rms. 12 watts per channel ; harmonic
distortion, 0.5% at 5 watts from 20 to 20,000
cps ; IM distortion, 1% at 15 watts ; hum and
noise, 80 db below rated output ; sensitivity,
35
AUGUST, 1962
AmericanRadioHistory.Com
music power
ut, 25 watts per channel ;
s, 18 watts per channel; harpower output,
monic distortion, 1% at 25 watts at 1000 cps ;
IM distortion, 2% at 15 watts ; hum and
noise, 90 db below rated output ; sensitivity,
.-.-..
o 0
-1-
f-
input for rated output -phono, 2.5 mv, tuner,
0.5 volts ; output impedance, 4 ohms ; inputs
phone, tape head, ceramic, aus ; weight, 8
-
-a-
input for rated output-phono, 2.0 mv, tuner,
0.25 volts ; damping factor, 8+; output impedances, 8 and 16 ohms; inputs 4 phono, 2
tape head, 2 tape amp., 2 aux. ; weight, 25
lbs; dimensions, 15%" wide, 5 7/16" high,
I1%" deep. Price, $79.95 in kit form. Accessories, WW50 walnut enclosure, $29.95; CX50
cage, $12.95. Harman- Kardon, Inc., Plainview,
N. Y.
1. A50K, 50 -watt ster amp kit
$119.95
HEATH
Model AA -21 Transistor Stereo Amplifier
Kit. Featuring 28 transistors and 10 diodes.
the Heathkit AA -21 provides transformerless
output circuit and multiple feedback loops.
All controls are front-panel mounted for operating convenience. A hinged lower front
panel conceals the tape- monitor input switch,
speaker
phase-reversal
switch, loudness
switch, and all input level controls. The lower
right section of the front panel is a unique
on /off switch, touch to turn on, touch to
turn off. All input and output connections
are conveniently located on the rear chassis
panel. Circuit safety is assured through the
use of five new, fast -acting bimetal circuit
breakers-no fuses to replace. Kit assembly
is fast and simple through the use of five
circuit boards which eliminate most of the
conventional point -to -point wiring. Preamplifier circuits are "capsulated" in six epoxy covered modules containing seventy resistors
and capacitors, all factory wired and sealed,
ready for installation on the preamp circuit
board.
lbs ; dimensions, 11" wide, 2 %" high, 91/4"
deep. Price, $89.95 kit. Accessories -metal
case, $4.95, wood case, $9.95. Allied Radio
Corporation, 100 N. Western Ave., Chicago 80,
Ill.
PACO
SA -40 Integrated Stereo Amplifier Kit. The
Paco SA -40 is a 40 -watt (20 per channel)
stereo integrated amplifier, with a low price
and distortion. Encompassing the latest innovations, it is suitable for many future
developments as well as the existing. In addition, it is flexible enough to accommodate
most existing needs.
REALISTIC
Transistor Stereo Amplifier.
transistor amplifier with
several unique features. All basic elements are
mounted on the front part of the circuit board
while the output section is on the rear to
avoid cross coupling. Special attention has
been paid to ventilation and air flow.
Specifications: Transistor complement (18)
transistors. Freq. Reap. 10 to 20k cps ± 1 db
at 80 watts output ; IHFM music power output, 50 watts per channel (4 ohms) ; power
output, rms 40 watts per channel (4 ohms) ;
harmonic distortion, 0.4% at 25 watts (8
ohms) from 20 to 2k cps, less than 3% from
2k to 20k at 25 watts ; IM distortion 1% at
25 watts ; hum and noise, 50 db below 1 watt
output ; sensitivity, input for rated output
phono, 2 mv, tuner, 0.25 volts; damping factor
40 (8 ohms) ; output impendance matches any
spkr 2 ohms or greater, inputs 4 phono, 4 tape
head, 2 aux, 2 tuners ; weight, 28 lbs. DimenTA -208 80 -Watt
An advanced design
-
sions, 15r,á" wide, 5%" high, 127/1" deep.
Price. $189.95 assembled, $139.93 kit. Radio
Shack Co., 730 Commonwealth Ave., Boston
17, Mass.
TRANSIS -TRONICS
Stereo Amplifier. The TEC all -transistor stereo amplifier, S -15, Is claimed to be
first
medium power hi -fl amplifier -preamp
the
ever produced. Features output transformer less design. Unit is free from heat, hum, and
microphonics. Also operates on 12 -28 d.c.
from battery.
S-15
Specifications: Tube complement (9) tubes,
(2) ailicon rect ; freq: resp. 30 to 90,000 cps
± 1 db at 1 watt output ; power bandwidth,
50 to 15,000 cps ; IHFM music power output,
25 watts per channel ; power output, rms,
20 watts per channel ; harmonic distortion,
2% at 20 watts from 50 to 15,000 cps ; IM
distortion, 2% at 20 watts ; hum and noise,
57 db below 1 watt output ; sensitivity, input
for rated output -phono, 5 mv, tuner, 0.75
volts; damping factor 22; output impedance,
4, 8, 16, 32 ohms ; inputs--phono, 47kí1, tape
head, 47k0, tape amp, 270k0, aux, 270k0 ;
weight, 25 lbs. Dimensions : 15%" wide, 5 %"
high, 11%4" deep. Price, $129.95 assembled,
$79.95 kit. Paco Electronics Company, Inc.,
70-31 84th St., Glendale, L. I., N. Y.
c .........,..
r.
Specifications: Transistor complement (22)
transistors, (7) diodes: freq. resp. 20 to 20,000
cps ±1 db at 5 watts output IHFM music
power output, 20 watts per channel harmonic distortion, 0.5% at 20 watts at 1000
cps; IM distortion, 0.9% at 20 watts hum
and noise, 85 db below 1 watt output ; sensitivity, input for rated output -phono, 3 mv,
tuner, 0.14 volts damping factor 32 ; output
impedances, 4 ohms ; Inputs -1 phono, 1 tape
amp, 2 aux, 1 tuner ; weight, 9 lbs. Dimen;
;
;
H. H. SCOTT
Specifications: Transistor complement, (28),
diodes (10) ; freq. resp. 20 to 20,000 cps ± 1
db at 70 watts output ; power bandwidth, S
to 40,000 cps ; IHFM music power output, 50
watts per channel ; power output, rms, 35
watts per channel ; harmonic distortion, less
than 2% at 70 watts from 20 to 50,000 cps;
IM distortion, less than 1.5% at 70 watts ;
hum and noise, 60 db below 1 watt output ;
LK -72 Complete Stereo Amplifier Kit. Typical assembly time is approximately 15 to 20
hours. Full -size full -color instruction manual.
Front panel "derived" center channel level
control, switching facilities that enable simultaneous connection of both a stereo tape
deck and stereo cartridge, and a full 40watt- per -channel (IHFM) over the entire
audio range make this amplifier kit an outstanding value.
$
sions : 101,(3" wide, 3" high, 8 %" deep. Price,
$139.50. Transis -Tronics, Inc., 1601 Olympic
Blvd., Santa Monica, Calif.
BASIC TUNERS
sensitivity, input for rated output -phono, 2.5
mv, tuner, 0.3 volts ; damping factor, unity ;
output impedances, 4, 8, and 16 ohms ; inputs
-mag phono, tape bead, tape amp, aux, tuner;
weight, 25 lbs., dimensions, 15'4" wide, 5"
high, 13 %" deep. Price, $134.95 kit. Heath
Company, Benton Harbor, Mich.
1. AA -100, 50 -w ster amp kit
2. AA -151, 28 -w ster amp kit
;
84.95
59.95
BOGEN
KNIGHT -KIT
KG -60 Transistorized 50 -watt Amplifier Kit.
Featuring the exclusive Knight -Kit thermal
feedback circuit, the KG -80 offers high power
at low distortion with all the advantages of
a transistor amplifier.
Specifications: Transistor complement, (20),
diodes (2), rectifier diodes, (4) ; freq. resp.,
20 to 20,000 cps ± 1 db at 50 watts output;
power bandwidth, t0 to 20,000 cps; IHFM
TP250
Specifications: Tube complement 11 tubes;
Freq. resp. 20 to 20k cps ± 1 db at 10 watts
output; power bandwidth, 19 to 25 k cps;
IHFM music power output, 40 watts per
channel; power output, rms, 36 watts per
channel ; harmonic distortion 0.8% from 20 to
20k cpa ; IM distortion 0.5% at 10 watts ; hum
and noise, 80 db below 1 watt output ; sen-
FM- Stereo Tuner. From the design
simplicity of the "Simple- Scanner" dial to
tuner features such as the "Stereo-Minder"
indicator, quick -acting electronic tuning eye,
and tape recording filter, the TP250 compares well with more costly tuners.
sitivity, input for rated output -phono, 3
mv, tuner. 0.5 volts ; damping factor 16 ; output impedances, 4, 8, 16 ohms ; inputs -5
phono, I tape head, 1 tape amp, 1 aux. 1
tuner; weight 30 lbs. Dimensions: 151/"
wide, 5'4" high, 13 %" deep. Price, $159.95.
Accessories : Cases in wood or metal from
$13.95. H. H. Scott, Inc., 111 Powdermill
Road, Maynard, Mass.
1. LK -48, 48 -watt complete stereo amp.$124.95
Specifications: FM Tube /transistor complement 10 plus 3 crystal diodes ; type of
AUDIO
36
AmericanRadioHistory.Com
AUGUST, 1962
front end grounded ,rid ; no. of 1.f. stages S ;
type of detector rat o detector ; type of tuning indicator elect, ,nic eye ; output signal
0.75 volts ; no. of o ttputs 2 ; controls mode,
tuning ; switches of i, power ; freq. resp. ± .5
db from 30 to 15,000 cps ; signal -to -noise ratio
60 db ; IHFM vol .me sensitivity 0.5 µv ;
capture ratio 4 db ; selectivity 40 db ; IHFM
usable sensitivity 2. µv ; AM suppression 50
db ; harmonic distor ion (100% mod.) 0.5% ;
stereo separation f+ db ; type of stereo drcult matrix ; type t f a.f.c. circuit reactance
tube ; drift 20 kc ; limensions : 12 %" wide,
4%" high, 11" deep; weight, 16 lbs. Other
features "Stereo -Mi: der" indicator, tape recording filter, age, r fc. Price $159.95. Accessories: EN18 metal enclosure, $11.95 ; WE -8
walnut cabinet $26..5. Bogen Commun. Div.,
Lear Siegler, Inc., Paramus, N. J.
I:RIC
Model 3457 MX D luxe FM Multiplex Tuner.
This Eric model fe ttures built -in multiplex
circuitry, with front panel separation control.
It employs a new C.E. Compactron tube for
more efficient Otani: construction.
Specifications: Fl, : Tube complement (1)
6CL8, (t) 12AV7, 1) 611Z6, (1) 6AU6, (2)
6E1V6, (I) 6AL5, (. ) 6D10, (1) EM84 ; type
of front end, tuned r f. stage; type of detector
Foster-Seely; type o:
tube; no. of output
tuning, separation ;
feat, power; freq.
15,000 cps ; sensitiv
ing ; dimensions : 1
834 deep ; weight,
1. 3157 MX -FM /M
2. 3357 FM tnr
3. MX 6000 MX Adz
tuning indicator electron
3 -FM, L, It; controls,
¡witches, mode, a.v.c. de'esp. ± 1 db from 50 to
ty Iµv for 20 db quiet '%" wide, 4 5/16" high,
8 lbs. Price $119.95.
$149.95
C tnr
72.95
59.95
Ater
FI SHER
Multiplex Tuner. High
tnd AM tuners on one
quality of both sections
be best music listening.
Specifications: F1 : Tube complement. 15
tubes, 15 diodes, I selenium rectifier; type
of front end neutro le ; no. of i.f. stages 5 ;
type of detector ra :io ; no. of audio stages
channel; t 'pe of tuning indicator
2 each
meter; output sigm I 2 volts rated output;
no. of outputs 2 eace channel ; controls, front
panel ; tuning, mi tang; Rear : 2 level;
switches. front pan. l: stereo filter, selector,
AM bandwidth, FM antenna; freq. resp. ± 1
db from 20 to 15 000 cps ; signal -to -noise
ratio 70 db ; IHFM volume sensitivity below
Model R-200 FJI -E
quality FM- Stereo
compact chassis. Th
is appropriate for
M
noise level; capture ratio 1.8 db ; selectivity
65 db ; IHFM usabl t sensitivity 1.6 µv ; AM
suppression 60 db ; h trmonic distortion (100%
mod) 0.4%; stereo t eparation 35 db ; type of
stereo circuit time 3iviaion switching ; type
tl!
circuit superhet with tuned r.f. and
stages; S -gang tuning capacitor; type of
detector diode; IHFM usable sensitivity
5 µv ; IIIFM volume sensitivity below noise
level ; freq. resp. 0 S db from 50 to 7500
cps ; harm dist. 1 %. Other features : 3- position
AM bandwidth selector, Jewel indicator for
AM, 10 -kc filter, loopstick antenna. Price
$299.50. Fisher Radio Corp., 21 -21 44th
Drive, L. I. C., N. Y.
universal MPX adapter ...$119.50
network relay FM- stereo
429.50
tuner
3. FM 2008, wide -band FM- stereo tuner 299.50
4. FM 1008, wide -band FM- stereo tuner 249.50
199.50
5. FM 50B, wide -band FM- stereo tuner
1. MPX -100,
2. FM -1000,
GROMMES
Model 101ßM. Stereo FM tuner with "Stereo
Sentry" that activates the bar tuning indicator when stereo is broadcast. Super sensitive
front end has 3 -gang capacitor, cascode r.f.
and silver plated coils. I.f. has wide -band high
gain OHSO tubes, tube and diode limiting and
balanced diode detector. Cool silicon power
supply and advanced compensation eliminate
drift so that no afc is required. Multiplex
section has trouble -free balanced -diode bridge
switching circuit.
Specifications: FM: Tube complement (2)
6DT8, (S) 61186, 6F06, 6EU7, 12AÚ7, (8)
diodes, silicon rectifier; type of front end
cascode-3 gang capacitor ; no. of i.f. stages
3; type of detector balanced diode; no. of
audio stages 0; type of tuning indicator eye
tube; output signal, 1 volt ; no. of outputs
(2); controls tuning and power off,
stereo -mono (2) ; freq. resp. ±.5 db from 20
to 20,000 cps ; signal -to -noise ratio 60 db ;
capture ratio 6 db ; selectivity 250kc; IIIFM
usable sensitivity 2 µv ; AM suppression 60
db; harmonic distortion (100% mod). 0.5 %;
stereo separation SO db ; type of stereo circuit bal. diode bridge switching ; type of a.f.c
circuit none ; drift 10 ko; dimensions 14"
wide, 41/2" high, 9" deep, weight 17 lbs. Price
$139.95 ; accessories, cover. $7.50. Precision
Electronics, Inc., 9101 King St., Franklin
Park, Ill.
1. 102DM, FM -AM with multiplex ster.$159.95
2. E104M, FM -AM with multiplex ster.. 129.95
L and R
KARG
Stereo FM tuner, Model FMX -9. Featuring
a wideband i.f. and discriminator, the Karg
FMX -9 incorporates advanced multiplex circuitry. Separate Jacks are provided for mono
and FM- stereo output. The 9 -in. slide rule
dial is calibrated each megacycle.
Specifications: FM : Tube 9 tubes ; type of
front end variable cap., r.f. amp osc -mix,
no. of 1.f. stages 3; type of detector FosterSeeley discrim ; no. of audio stages 1/chan;
type of tuning indicator eye tube; output
signal 1.5 volts; no. of outputs 3: A and B
mono ; controls tuning, volume (combined
w.
power switch) ; switches 1. Mode
(Stereo, mono, standby). 2. Subchannef filter.
3. AVC; freq. resp. ± I db from 40 to 15,000
cps; signal -to -noise ratio 48 db ; IHFM volume sensitivity 2.2 µv ; capture ratio 3 db;
IHFM usable sensitivity 2.2 µv ; AM suppression 32 db ; harmonic distortion (100% mod.)
1% ; stereo separation 33 db; type of stereo
circuit time division ; drift 10 kc ; dimensions : 15%" wide, 5" high, 51/2" deep ; weight,
11 lbs. Price, $199.95. Karg Laboratories, 162
Ely Ave., S. Norwalk, Conn.
$119.95
1. CT -3, mono FM tuner
99.30
2. MX -3, FM- stereo adapter
39.95
-5,
adapter
MX
FMstereo
3.
4. MX -2, FM- stereo adapter, plug -in for
44.50
Karg tuners
5. XT -IA, crystal -controlled 12 channel
229.95
tuner
LAFAYETTE
LT -t1 FM- Sterco Tuner-. The LT -81 is a
moderately priced FM tuner with built -in
multiplex provisions. The performance, however, features sensitivity and low distortion.
It integrates well with many of the Lafayette
systems, as well as with others.
HARMAN - KARDON
Model T.;oo-l', :I.11 -l.11 -I'M Stereo Tuner. A
complete AM -FM tuner with built -in facilities
for receiving FM stereo. Although modest in
price, it certainly is not modest in performance.
Specifications: FM : tube complement (1)
EZ81, (1) 6AJ8, (1) 6A08, (2) ECF80, (1)
6EQ7, (1) 611N6, (1) 12AU7, (1) 604; type
of front end, tuned grounded -grid r.f.; no.
of 1.f stages, 4 ; type of detector. Foster Scely ; output signal, 1.75 volts ; no. of output,
ran true? tnninq ac ¡low. n r i
,-.111111111®
Specifications: FM : Tube complement (8)
tubes, (4) diodes; type of front end grounded
grid ; no. of i.f. stages 4 : type of detector
ratio ; no. of audio stages I ; type of tuning
indicator meter; output signal 1 volt ; no. of
outputs 2; controls tuning switches selector,
noise filter, a.f.c., power; freq. resp. ± 2 db
from 20 to 20,000 cps ; IHFM usable sensitivity 6 µy; harmonic distortion (100% mod.)
/%; stereo separation 35 db ; dimensions :
131/2" wide, 5%" high, 9%" deep; weight, 12
lbs. Other features 3 -gang tuning capacitor.
Price, $76.50. Lafayette Radio Electronics, 111
Jericho Turnpike, Syosset, L. I. N. Y.
;
LEAK
Y
MH11 FM- Stereo Tuner. An ideal companion
.
_
_
=
_
_
_
; drift less than 10 kc ;
dimensions 153," wi le, 4 13/16" high, 12%"
deep; weight 20 lbs Other features : 3 Jewel
indicators for Stere Beacon, AM. and FM,
10-kc filter on AM; flywheel tuning. Accessories : Cabinets-woe J (10 -U) $24.95 ; metal
of a.f.c. circuit non,
(MC -2) $15.95.
AM : Tube compte ment see above: type of
AUDIO
separation, 30+ db; type of stereo circuit,
switching: type of a.f.c circuit reactance
tube ; drift ± 20 kc ; dimensions, 15" wide, 6"
high, 11%" deep ; weight 25 lbs.
AM section : type of circuit, low -noise, high gain r.f. pentode, S -gang tuning capacitor;
type of detector, high- perveanc'e diode; no. of
i.f. stages, 2; IHFM usable sensitivity, 25 µv ;
freq. resp. ± 1 db from 20 to 5000 cps ; harm
dist. less than 1 %. Price, $149.95. IlarmanKardon, Inc., Plainview, N. Y.
$169.90
1. F500X, FM- stereo tuner
69.95
2. F10, FM (mono) tuner
re u, pooch r
l'Jl, l'JI
filter; freq. resp. ±1 db from
AM /FM,
.,n, ur ;, noise
10 to 35,000
cps; signal -to -noise ratio, 65 dh ; capture
ratio, 5 db; selectivity, 240 ko bandwidth 6
db down; IHFM usable sensitivity 32 µv ; harmonic distortion (100% mod). 0.1 %; stereo
for the "Point One" stereo preamplifier.
Specifications: FM : Tube complement (2)
ls'CF80, ECC84, ECC85, EF80, E1184, EZ80
(2) 0A79; no. of i.f. stages 2 ; type of detector
Foster Seely; type of tuning indicator maximum closure ; output signal 1 volt ; no. of
outputs 2 ; controls tune, volume, on -off ;
switches afc, local-distance ; IHFM usable sen-
kc; dimensions : 1035"
lbs.
; weight, 11
Other features : cathode follower-- sensitivity
strength.
switch for locations of high signal
Accessories : Supplied with color inserts to
sitivity 2µv; drift
wide, 3%" high,
7
15
%" deep
37
AU SUST, 1962
AmericanRadioHistory.Com
OMEGA
Model 1650 FM /FM- Stereo Tuner. The latest addition to the Omega line of transistorized equipment, the Model 1650 FM-stereo
tuner is designed to complement the Model
1600 amplifier. Incorporating a new type
of multiplex circuitry, the 1650 is capable
of receiving relatively weak stereo signals
because of its sensitivity and wide -band design.
cator meter.
1.
TX600 FM ster tnr tuning eye
$129.95
2. TAX600 AM -FM ster tnr, tuning eye 169.95
249.95
3. TCCX700 FM ster tnr /preamp
4. TCCAXP700 AM -FM ster tnr/preamp 279.95
REALISTIC
AM- FM /MLPX Stereo Tuner, TM-8. TM -8
AM- FM-MPX Tuner, an all -in-one AM -FM
tuner with built-in multiplex for FM stereo.
Meter tuning is utilized for both Ahi and
match room decor. Price $149.00 Ercona Corp.,
16 W. 46th St., New York, N. Y.
FM.
Specifications: FM : Tube complement (1)
6X4, (5) 6.4Q8, (1) 6BA6, (3) 6A116; type
of front end grounded grid, t.r.f. ; no. of i.f.
stages 2; type of detector ratio ; no. of audio
McINTOSH
MX110 Tuner- Preamp Stereo Combination.
The MX110 combines in one convenient instrument an FM tuner, a multiplex decoder,
and a stereo preamplifier. You mount only this
one unit, connect it to your power amplifier
and speakers, and listen. The preamp is similar to the C11, while the tuner has increased
sensitivity and stability so that a.f.c is no
longer needed. The MX indicator lights up
whenever the tuner is centered on an FM
stereo broadcast.
of circuit auperhet ; 2 -gang tuning capacitor ;
type of detector, diode ; type of tuning indi-
Specifications: FM : Transistor complement
transistors; type of front end MADT
transistor ; no. of 1.f. stages 5 ; type of detector wide -band ratio ; type of tuning indicator balanced eye; output signal 0.8 volts ; no.
of outputs 5 ; controls on -off, afc, quieting
threshold, output, level, tuning, local-distant,
stereo noise filter ; freq. resp. ± 1 db from 30
to 15 k cps ; capture ratio 3 db ; IHFM usable
sensitivity 1.8 µv; harmonic distortion (100%
mod.) 0.4% ; stereo separation 33 db ; type of
stereo circuit switching; drift 15 kc ; dimensions: 15%" wide, 3" high, 9" deep ; weight,
101 lbs. Other features stereo broadcast indicator, built -in antenna. Price $249.00. Omega
Electronics Corp., 10017 North 19th St..
Phoenix, Arizona.
28
stages 2; type of tuning indicator meter;
output signal t volts ; no. of outputs t ;
controls tuning, dimension ; switches on -off
a.f.c. on -off, noise filter on -off, function selector; freq. resp. ±2 db from 30 to 15 k
cps; signal -to -noise ratio 50 db; IHFM usable
sensitivity 2.5 µv; AM suppression 25 db;
harmonic distortion (100% mod.) 0.7 %s;
stereo separation 27 db ; type of stereo circuit carrier injection ; type of a.f.c. circuit reactance tube; dimensions: 14%" wide, 5'
high, 10" deep; weight 20 lbs. AM : Tube complement (2) 6BA6, (1) 6ßE6, (1) OA81;
type of circuit superheterodyne; 3 -gang tuning capacitor ; type of detector diode
wave ; no. of i.f. stages 1; type of tuning
indicator meter ; IHFM usable sensitivity 70
µv; freq. resp. ±1 db from 20 to 7k cps.
Other features t.r.f. stage. Price $99.95. Radio
Shack, 730 Commonwealth Ave., Boston 17,
Mass.
-%
QUAD
Specifications: FM : Tube complement (1)
6BN4A, (2) 12AT7, (1) 6AB4, (3) 6AU6, (1)
6C86, (3) 12AX7, (3) 6U8, (1) EM84A;
(16) semiconductors ; type of front end r.f.
stage ; no. of 1.f. stages 4 ; type of detector.
discriminator ; type of tuning indicator
electron tube; output signal 3 volts ; no. of
outputs 2 each channel, L + R, tape ; controls
tuning, selector, mode, dual concentric basa
and treble, balance; switches muting, scratch,
rumble, loudness, tape mon, reverse; freq.
resp. ± 1 db front 20 to 20,000 cps ; sensitivity
2.5 µv; harmonic distortion (100% mod.)
ice8 than 0.6% ; drift less than 25 kc ; Freq.
resp. 20 to 20,000 cps ± 0.5 db ; output, 3
volts per channel ; IM distortion 0.2%
at 5 volts ; hum and noise, 80 db below 3 -volt output on high -level inputs ; sensitivity, input for rated output
phono, 3
mv, aux. 0.3 volts ; inputs
phono, t tape
head, 2 tape amp, 2 aux ; dimensions, 15T,ß"
wide, 514" high, 13" deep ; weight, 20 lbs.
Price, $347.50. Accessories, cabinet, $25.00.
McIntosh Laboratory, Inc., 2 Chambers St.,
Binghamton, N. Y.
-4
-
MONARCH
Model FM -100 Budget FM Tuner. An economically priced FM tuner with high sensitivity, automatic frequency control, attractive
solid brass panel, and slide rule dial. Compact, drift -free, and distortionless. the FM100 is incomparable in its price class.
Compact F31 Tuner. The Quad FM tuner
is a compact unit designed to be used with
Quad anmplifiers. It is an attractive companion to the Quad 22 or II. Special features
ore a positive tuning indicator ; drift -free
temperature-compensated a.f.c. circuitry ; low
distortion ; and high noise rejection.
FM : Tube
complement
6BJ6 ; 12AT7 ; 6BH6(2) ;
front end variable capacitor ;
6AU6 ;
no. of 1.f. stages 3 ; type of detector phase discriminator; type of tuning indicator 2 neon
lights; output signal 100 mv ; no. of outputs
two ; controls tuning ; freq. reap. from 20 to
20k cps ; IHFM volume sensitivity 100 pv ;
usable sensitivity 3 p.v for 20 db of quieting;
type of a.f.c. circuit temp. comp. ; dimensions :
10 %" wide, 31/4" high, 6" deep ; weight, 8 lbs.
Price, $125.00. Lectronics of City Line Center,
7644 City Line Ave., Philadelphia 31, Pa. Pa.
Specifications:
641.L5;
12AX7
type of
;
RAVENSWOOD
TX -700 FM Stereo Tuner. The TX -700
tuner is designed to provide high -quality
FM stereo signals to any control amplifier
Specifications: FM : Tube complement, (2)
6AQ8, (3) 6BA6, (1) 6AL5, (1) 6X4; output signal 0.5 volts ; no. of outputs 1; con-
trols power, tuning; switches a.v.c. on /off;
sensitivity 2.5 pv for 20 db quieting : harmonic distortion (100% mod.) 1 %; dimensions: 11 %" wide, 3 9/16" high, 5 %" deep.
Price, $39.95. Monarch Electronics International, Inc., North Hollywood, California.
1.
FM -100X FM -MPX
tnr
$74.95
H. H. SCOTT
Wideband FM Multiples Stereo
Tuner. Built-in multiplex circuitry receives
FM- stereo broadcasts without an adaptor.
The 350B also receives regular monophonic
FM broadcasts. Scott's new Sonic Monitor
tells you automatically when stereo is on the
air. Simply turn the switch and tune to the
tone. Wide-band design assures IHFM sensitivity of 2.2 pv and stereo separation that
matches FCC transmission specifications. Exclusive Scott filtering circuits permit good results with any tape recorder.
350-B
and power amplifiers and speakers or to any
integrated amplifier with complete assurance
of distortion -free and drift -free performance.
Similar in form is the TAX-700, which provides the same facilities as the TX -700 and
in addition, an AM tuner of exceptional performance.
Specifications: FM : Tube /transistor complement (1) AFI14, (1) AF115, (4) AF116:
type of front end, autodyne; no. of i.f. stages
4 ; no. of audio stages 1 ; type of tuning indicator meter ; output signal 1 volt ; IHFM
usable sensitivity 2.9 µv ; stereo separation
29 db ; dimensions : 13%" wide, 11" high, 4"
deep. Price, $159.95. Also available with AM,
Model TXA 700 $189.95. AM : Tube complement (1) ECH81, (1) 6BA6, (1) 6AU6 ; type
Specifications: FM : Tube complement 9
tubes, 11 diodes, selenium rectifier; type of
front end cascode ; no. i.f. stages 3 ; type of
detector ratio; no. of audio stages 3; type
of tuning indicator meter ; output signal 1.5
volts ; no. of outputs t sets; controls vernier
tuning, individual level controls (rear panel) ;
switches "Sonic Monitor," a.g.c., stereo noise
filter; freq. reap. ± 1 db from 20 to 20 k
cps ; signal -to-noise ratio 60 db ; capture ratio
6.0 db ; selectivity 35 db ; IHFM usable sensitivity 2.2 pv ; AM suppression 55 db ; harmonic distortion (100% mod.) 0.8 %; stereo
separation 35 db ; type of stereo circuit time
switching ; drift 0.02% ; dimensions : 15%"
side, 51/4" high, 131/2" deep ; weight, 13 lbs.
Other features: sub -channel noise filter,
switchabie a.g.c., front panel tape output, individual level controls for each channel. Price,
$219.95. H. H. Scott, Inc., 111 Powdermill
Road, Maynard, Mass.
1. 333 AM /FM multiplex stereo tuner
2. 314 FM mono tuner
SHERWOOD
S-2100 FM-MPX -AM Stereo Tuner. The
Model S -2100 enables you to enjoy modern
stereocasts via FM multiplex in your area.
AUDIO
38
AmericanRadioHistory.Com
AUGUST, 1962
Front -panel controls and complete FM- multiplex stereo circuitry are furnished to provide
low -distortion etereo reception. The S -2100/
MX also features the reception of AM broadcasts with the excellent fidelity afforded by
the 15 -kc wide "hi-fi" band pass. A sharply
selective 5 -kc pass -band is also selectable on
the front panel for "pulling -in" weaker AM
broadcasts. Stereo-MX programs are each identified on the S -2100 by the instant indication
on Sherwood's new Stereo-lite.
Specifications: FM : tube complement 12
tubes, 7 diodes, rectifier; type of front end
cascode r.f. amp; no. of i.f. stages 2; type of
detector balanced ; type of tuning indicator
tuning eye ; output signal 1.4 volts ; controls
tuning, selector; switches off-on, a.f.c.; freq.
resp. ± 0.5 db from 20 to 20,000 cps ; signal to -noise ratio 60 db ; selectivity 220 kc at S
db ; IHFM usable sensitivity 1.8 pv ; harmonic
distortion (100% mod.) IA %; drift 25 kc ;
dimensions : 14" wide, 4" high, /21/2" deep;
weight, 24 lbs. AM ; Type of circuit superhet ;
type of detector diode; no. of i.f. stages 1;
type of tuning indicator tuning eye; usable
sensitivity t pv at 60% mod. for 0.5 v. out,
db from 20
6 db S/N ; freq. resp. (wide)
to 7500 cps. Price, $199.50. Sherwood Electronic Labs, 4300 N. California Ave., Chicago
18, Ill.
6
mono amplifier, which fits in the same space
as the adapter providing maximum versatility
from a single unit.
Specifications: FM : type of front end cathode coupled ; no. of i.f. stages 4 ; type of detector balanced bridge ; no. of audio stages 2 ;
type of tuning indicator eye tube ; output signal 2 volts ; no. of outputs 2; controls volume
tuning ; switches on -off ; freq. resp. 0.5 db
from 10 to 40k cps; signal -to -noise ratio 70db;
IHFM volume sensitivity infinite; capture
ratio 5 db ; selectivity 54 db ; IHFM usable
sensitivity 4 ay ; AM suppression 6$ db ; harmonic distortion (100% mod.) 0.5 %; stereo
separation (with F11X-S) 30 db; type of
stereo circuit envelope detection and doubler;
type of a.f.c. circuit none; drift less than 2.5
kc ; dimensions : 13" wide, 4" high 8" deep ;
weight 11 lbs. Other features : FMX -3 multiplex integrator fits inside chassis. Price
4FM -1) $119.95 assembled, $79.95 kit. Accessories PM -4 panel mount kit $4.95, PK -40 deluxe panel, knobs $9.95. Dynaco, Inc. 3912
Powelton Ave., Philadelphia, Pa.
1. FMX -3 multiplex adapter kit
$ 29.95
2. FMA -2 mono amp kit
TRANSIS- TRONICS
FM -15MX FM- Ste,co Multiplex Tuner. All -
transistor FM multip x tuner has advanced
circuitry. Circuit is eensitive and has maximum stability of tuning.
Specifications: FM Transistor complement
(20) transistors, (9) diodes no. cf i.f. stages
4
type of detector discriminator; no. of audio
stages I ; type of tuning indicator meter; outi
:
;
;
29.95
EICO
FM- Stereo Tuner Kit. New from
this FM- Stereo tuner kit which feasensitive tuner combined with the
EICO multiplex circuitry.
Specifications: FM : Tube (1) ECC85, (1)
12AT7, (I) DM70, (5) 6A06 (2) 12.4E17, (1)
EZ80 rect., (I) 8AL5, (1) 6D10, (6) signal
diodes ; type of front end r. /. amp and self
oscillating mixer; no. of 1.f. stages 4 ; types
of detector ratio; no. of stereo demod. stages
ST-97
EICO is
tures a
exclusive
puts t each channel; controls on face panel:
tuning ; on rear : left and right level; switches
Selector, Stereo, Filter, Power (Meter selector on top of chassis for alignment) ;
freq. resp. ± 1 db from 20 to 15,000 cps; signal -to -noise ratio 70 db ; IHFM volume sensitivity below noise level; capture ratio 2.5
db; selectivity 60 db; IHFM usable sensitivity
.1.8 ay ; AM suppression 55 db ; harmonic distortion (100% mod.) 0.5% ; stereo separation 35 db ; type of stereo circuit time-division
switching ; type of a.f.c. circuit none; drift
15 kc max; dimensions: 151ái" wide, 4 13/16"
high, 13" deep; weight, 18 lbs. Other features
stereo beam indicator. Price, $219.50 assembled; $169.50 kit. Accessories Cabinets:
Wood (10 -U) 24.95; Metal -simulated leather
$15.95. Fisher Radio Corp., 21-21 44th Drive,
L.I.C., N. Y.
HARMAN -KARDON
Citation IIIX Professional FM- Stereo
Tuner Kit. Now with built -in multiplex, the
Citation IIiX remains the top of Harman Kanton kit tuner line -by a goodly amount.
Famous for the role it played in opening the
kit field for the highest -quality FM tuners
the IIIX is still in the forefront.
Specifications: FM : Tube complement (1)
6CW4, (1) ECC85, (2) ECF80, (2) 6AUS, (t)
6ßN6, (t) 12A 17, (I)EZ81, (I) 12AT7 (8)
diodes ; type of front end Nuvistor triode; no.
of 1.f. stages 5 ; type of detector Foster-Seely;
; type of tuning indicator combination tuning eye -station indicator; output signal 0.7
10
put signal 1 volt; no. of outputs t pair; controls tuning, muting level ; switches a.f.c.,
muting, power, MX ; freq. resp. ± 1 db from
20 to 20,000 cps; signal -to -noise ratio 66 db ;
IHFM volume sensitivity 0.9 pv ; capture
ratio 5.1 db ; IHFM usable sensitivity 3.5 ;ay ;
stereo separation 30 db ; type of stereo circuit
switching; drift 15 kc ; dimensions : /01,"
wide, S" high, 8 %" deep ; weight. 8 lbs. Other
features exceptional bandwidth -270 kc, 6 db
down. Price, $199.50. Transis- Tronics, Inc.,
1601 Olympic Blvd., Santa Monica, Calif.
BASIC TUNER
KITS
DYNACO
FM-1 Tuner. The basic FM -1 monotoner
features etched circuit design for exact reproducibility, and a complete system for customer alignment without instruments. To the
basic tuner may be added either the FMX -3
multiplex integrator or the FMA -2 10 -watt
AUDIO
no. of audio stages 3; type of tuning indicator
volts ; no. of outputs (2) stereo, (1) FM det ;
controls on -off, tuning, separation ; switches
Stereo-Mono, a/c- defeat ; freq. resp. 1 db from
20 to 15,000 cps; signal-to -noise ratio 55 db;
capture ratio 3 db ; IHFM usable sensitivity S
pv; harmonic distortion (100% mod.) 0.5 %;
stereo separation 30 db ; type of stereo circuit matrix; drift 20 kc; dimension : 15%"
wide, 51/2" high, 11 %" deep; weight 17 lbs.
Other features : Stereo broadcast indicator
(neon lamp) pre -wired and pre -aligned front
end and i.f. strip in kit. Price, $149.95 assembled; $99.55 kit. Electronic Instrument
Co., Inc., 3300 Northern Blvd., L.I.C., N. Y.
FISHER
KM -60 Wide -Band FM- Stereo Tuner Kit. A
tuner kit with built -in and preassembled
multiplex circuitry, the KM-60 features
"Stereo Beam" which indicates when a stereo
program is being broadcast. The kit is easy
to build and represents a substantial financial
saving.
Specifications: FM : Tube /transistor complement 11 tubes, 12 diodes, 1 selenium rect.
type of front end Golden Cascode ; no. of 1.f.
stages 4 ; type of detector ratio; no. of audio
stages 1 each channel; type of tuning indi
cator meter; output signal 2 volts; no. of out-
(2) level, center -of- channel, meters; output
signal S volts; no. of outputs 2; controls tuning, loudness ; switches a.f.c., interchannel
muting, local /distance, power /stereo function ;
freq. resp ± % db from 1 to 52,000 cps; signalto -noise ratio 75 db ; capture ratio S db ;
selectivity 240 kc bandwidth 6 db down;
IIIFM usable sensitivity 1.65 pv ; harmonic
distortion (100% mod) less than 0.1% ; stereo
separation 30 db; type of stereo circuit
switching; type of a.f.c. circuit solid state;
drift less than 15 kc ; dimensions 14%" wide,
6" high, 12'4" deep ; weight 30 lbs. Price
$299.95 assembled, $219.95 kit. Accessories:
WCI walnut cabinet, $29.95. Harman -Kardon,
Inc., Plainview, N. Y.
$129.95
1. F5OXK, FM -ster tuner kit
HEATH
A -41
AM /FM Stereo Tuner. In
addition to AM or FM reception, the AJ-21
features a built -in stereo converter. A neon
light indicator shows when an FM- stereo signal is received and individual tuning meters
for AM and FM permit precise station settings. An FM squelch circuit eliminates noise
between stations when tuning across the FM
band. Cathode follower outputs provide low
line impedance to minimize hum and high frequency losses in the interconnecting audio
cables. In mono AM or FM modes of operation
the output stages are tied together to supply
the same information to both the left and
right channel amplifiers of a stereo system.
Model
39
AUGUST, 1962
AmericanRadioHistory.Com
J
In FM stereo position both channels function
separately. A multiplex phase control permits fine tuning for maximum separation.
Specifications: FM-tube complement, (9) ;
type of front end, r./. amp, oac, and mixer ;
no. of I.f. stages, 5 ; type of detector, diacriminator; type of tuning Indicator, meter ; output signal, 0.5 volts ; no. of outputs, 3 ; controls, power and ate, FM- stereo, phase, mode,
AM fidelity and FM squelch, FM tuning, AM
tuning, FM meter calibrate, AM meter calibrate, channel separation, left level, right
level ; freq. resp. ± 2 db from 20 to 20,000 cps ;
capture ratio, 12 db ; IHFM usable sensitivity,
3 gay; AM suppression, 25 db ; harmonic distortion (100% mod.) 1 %n ; stereo separation,
30 db ; type of stereo circuit, matrix ; type of
a.f.c. circuit, reactance tube : dimensions,
15%" wide, 51/4" high, 144" deep; weight,
18%2
lbs.
AM : tube complement, 3 ; diodes, t ; type
of circuit, r.f. amp superhet ; 3 -gang tuning
capacitor ; type of detector, voltage doubler ;
no. of i.f. stages, 1; type of tuning indicator,
meter ; controls (see above) ; IHFM usable
sensitivity, 4µv ; freq. resp. ± 3 db from 20 to
8000 cps ; harm. dist. /%. Other features:
10 -kc whistle filter, switchable bandwidth.
Price, $189.95 assembled, $119.95 kit. Heath
Company, Benton Harbor, Mich.
1. AJ -30 Deluxe AM /FM tuner kit ....$ 99.95
2. Al-11 economy AM /FM tuner kit ...
69.95
KNIGHT-KIT
KF -75 FM- Stereo Tuner Kit. Featuring
wide -band i.f. circuitry and printed circuit
boards for easy assembly, the KF -75 is intended for the economy -minded kit builder
who desires fine FM- stereo reproduction.
TUNER -AMPLIFIERS
OR
RECEIVERS
resp. ± 3 db from 20 to 5000 cps ; harm. dist.
1 %. Other features, tuned r.f. stage, 10 kc
whistle filter, cathode follower output, complete AM circuitry on one printed circuit
board, rotatable built -in ferrite antenna, flywheel tuning. Price $134.95 assembled ; $84.95
kit. Paco Electronics Co., 70-31 84th St.,
Glendale 27, L. I., N. Y.
1.
ST35MX, FM- stereo tuner kit
2. ST25, FM tuner kit
3. ST26, FM tuner plus amplifier kit
4. MX -100, multiplex adapter kit
$99.95
42.95
54.95
49.95
R-A-E
Model 250 Stereo -Mono Tuner Kit. Another
new kit product from R -A -E featuring kit design for easy construction plus a good per-
forming instrument.
Specifications: FM : Tube complement (2)
6AU6, 6AU5, 6ßN8, 6AV6, 6X4, (2) ECC85,
(2) 6AU6 ; type of front end Torotor; no. of
1.f. stages 3 ; types of tuning indicator
EM84 ; output signal 0.5 volts; no. of outputs mono á stereo ; controls : tuning, mono
volume, stereo volume ; IHFM usable sen
sitivity 0.7 µv ; AM suppression 20 db ; stereo
separation 30 db ; type of stereo circuit gate
switch ; dimensions : 9" wide, 894" high, 11^
deep ; weight, 9 lbs.
Other features : four parts boards and three
decks are assembled and wired separately,
and then mounted on the chassis. Price,
$129.95 kit. R-A -E Equipment, Inc., Central
Bank Bldg., Great Barrington, Mass.
H. H. SCOTT
Specifications: Tube complement, (t) 6.41.16,
1LAU7, 6AL5, (2) 6Cß6, (2) 6AQ8, EM84,
EZ81 ; type of front end, t.r.f. ; no. of 1.f.
stages, 4; type of detector, discriminator ; no.
of audio stages, 2 ; type of tuning indicator,
eye; output signal, 10 volts ; no. of outputs,
2 ; controls, FM tuning, dimension ; switches,
on -off, DSR, a.f.c., selector ; freq. resp. t 1 db
from 20 to 20,000 cps ; selectivity, ± 3 db ;
IHFM usable sensitivity, 1.5 pv ; AM suppression, 40 db ; harmonic distortion (100% mod.)
1% ; stereo separation, 30 db ; type of stereo
circuit, matrix ; dimensions, 151/2" wide, 4%"
high, 15" deep ; weight, 26 lbs. Price. $84.95
kit. Allied Radio Corporation, 100 N. Western
Ave., Chicago 80,
I11.
LT -110 Wide-Band I'll Multiplex Stereo
Tuner Kit. The new LT -110 utilizes the same
front end used in the famous Scott 310D
Broadcast Monitor tuner. The front end and
multiplex sections are pre -wired and pre aligned at the factory assuring ideal reception and stereo quality even in weak signal
areas, and eliminating the need for elaborate
test equipment in alignment. The silver plated front end, copper -bonded -to- aluminum
chassis, and wide-band design all contribute to
an IHFM sensitivity of 2.2 microvolts. The
LT -110 uses an even more simplified Ez -ALine method than that used so successfully
by builders of thousands of LT -10 tuners.
compact 6" x 15" x 131" cabinet : FM, FM
multiplex, AM, dual -channel preamplifiers,
dual -channel power amplifiers. The wide -band
FM tuner features sensitivity to assure highest gain, lowest noise. A built -in FM multiplex
tuner provides 30 db stereo separation between channels over the entire audio range.
To take all guesswork out of tuning, a monitor light flashes automatically when stereo
signal is received. The AM tuner provides excellent image and i.f. rejection. The amplifier section features a complete complement
of controls and includes facilities for everything from record and tape player to the
stereo headphones. Powerful dual -channel amplifiers.
Specifications: FM : Tube/transistor complement (entire rec.) (12) transistors, (5)
diodes, (18) tubes, type of front end cascode;
type of tuning indicator eye tube; freq. resp.
± 1 db from 20 to 20,000 cps ; IHFM usable
sensitivity 2 µv ; stereo separation 30 db ;
type of stereo circuit time division ; AM :
IHFM usable sensitivity 2.9 µv.
Amplifier : Freq. resp. 20 to 20,000 cps ± 1
db at 1 watt output ; IHFM music power
output 27.5 watts per channel ; harmonic distortion, 1% at 20 watts from 25 to 10,000
cps; hum and noise, 60 db below 20 watts
output ; sensitivity, input for rated output
meg. phono, 4 mv, cer. phono .25 volts ; damping factor 10 ; output impedances 8, 16 ohms;
inputs
phono, 2 tape head, 2 tape amp;
dimensions : 15" wide, 5%" high, 1434" deep.
Price, $597.00 Altec Lansing Corp., 1515 S.
Manchester Ave., Anaheim, Calif.
-
-4
BELL
PACO
Model ST45 AM /FM Tuner Kit. Available
in a variety of ways
a full kit, as a semi kit, and factory wired -the Paco ST -45 is a
sensitive AM -FM tuner at a very moderate
price. The AM and FM sections are independent so that simulcasts may be received
or different programs may be sent simultaneously to different locations.
Specifications: FM : Tube complement 7
tubes, 6X4 rectifier, and EM84 ; type of
front end, three -gang tuning capacitor
grounded grid r.J. ; no. of i.f. stages 4 ; type
of detector Foster -Seely discriminator; type
of tuning indicator eye tube; output signal
t volts ; no. of outputs t ; controls "FM level,"
AM tuning, FM tuning ; switches power, a.f.c.,
function selector ; freq. resp. t'/, db from 20
to 20,000 cps ; sensitivity 2µv for 30 db quieting; harmonic distortion (100% mod.) 1 %;
type of a.f.c. circuit reactance tube ; dimensions: 15 %" wide, 5%" high, 11%" deep;
weight, 19 lbs. Other features dual limiters,
cathode followers output, complete FM circuitry on one printed -circuitboard, flywheel
tuning, provision for addition of FM-stereo
adapter. AM : Tube complement 3 tubes and
crystal diode; type of circuit superhet with
3 stages a.v.c.; 3 -gang tuning capacitor ; controls AM level ; switches same as above ; freq.
ALTEC
" Astro" AM- FM -MPX Receiver. Five integrated stereo components are packaged in a
-as
Specifications: FM : type of front end cas ;
no. of 1.f. stages 3 ; type of detector
ratio ; no. of audio stages 3; type of tuning
indicator meter ; output signal 1.5 volts ; no.
of outputs 2 sets ; controls vernier tuning,
level; switches a.g.c., independent on /off ; freq.
resp. ± 1 db from 20 to 20k cps ; signal -tonoise ratio 60 db ; capture ratio 8.0 db; selectivity 3.5 db ; IHFM usable sensitivity 2.2
µv; AM suppression 55 db; harmonic distortion (100% mod.) 0.8% ; stereo separation 35 db; type of stereo circuit time switching ; drift 0.02 %. Other features sub- channel
noise filter, switchable a.g.c. circuitry to permit
tape recording, front panel audio output for
taping. Price, $159.95 kit. Accessories, cases in
various woods á metal from $13.95. H. H.
Scott, Inc., 111 I'owdermill Road, Maynard,
code
Mass.
1.
LT -10 FM
mono tuner kit
$99.95
Model 2445 Stereo Amplifier -Tuner Combination. Offering such unusual features as
cancellation of vertical components when the
mode switch is in mono position, and the provision of two phono inputs so that two record playing sources may be left connected at all
times, the 2445 offers complete stereo -mono
control for a high -quality home system.
Specifications: FM : Tube complement (1)
6ßN8, (2) ECC85, (1) 6A54, (3) 6AU6 ; type
of front end, neutralized cascode; no. of 11.
stages 3 ; type of detector, ratio ; type of
tuning indicator meter; output signal 1.5
volts ; no. of outputs 3 ; switches, a.f.c; freq.
resp. ± 1 db from 30 to 53,000 cps ; signal -tonoise ratio 55 db ; IHFM volume sensitivity
1.5 isv ; capture ratio 2 db ; selectivity -6
db 250 kc ; IHFM usable sensitivity 1.8 µv;
AM suppression 40 db ; harmonic distortion
(100% mod.) 1 %; stereo separation 28 db;
type of stereo circuit, time switching ; type
of a.f.c. circuit, reactance tube. Other features,
Stereo Sentry- indicator light for stereo FM.
AM : Tube complement (2) 6B.46, (1) 651í6,
(1) 6BN8, (1) EZ80 ; type of circuit t.r.f., delayed a.v.c. ; 3 -gang tuning capacitor ; type of
tuning indicator diode ; IHFM usable sensitivity 25 µv ; IHFM volume sensitivity 3 µv ; freq.
resp. ± 1 db from 30 to 4000 cps ; harm. dist.
1 %. Freq. resp. 20 to 20,000 cps ± 1 db at 1
AUDIO
40
AmericanRadioHistory.Com
AUGUST, 1962
J.
.~
tures of models 70PG stereo amplifier and
101BM multiplex tuner plus high performance AM. Eight panel controls and 5 slide
switches include concentric bass and treble,
blend control and dual contour switches. Provision for center -channel speaker.
Specifications: í'M : Tube (2) 6DT8, (3)
61136, 6BA6, 6ßE6, 6F06, 12AÚ7 (7) 6EU7,
(5) 7868, 64134, (8) diodes, (6) silicon rect. ;
type of front end cescode -3 gang capacitor;
no. of i.f. stages S ; type of detector balanced
diode ; type of tuning indicator eye tube ; controls tuning, selector, blend, bal., loudness,
bass, treble, pwr sw ; switches Lo filter, Hi filter, FM- stereo, contour -1, contour-2 ; freq. resp.
±0.5 db from 20 to 20,000 cps; signal -to -noise
ratio 60 db ; capture ratio 6 db ; selectivity
250kc ; IHFM usable sensitivity 2 µv; AM
suppression 60 db; harmonic distortion (100%
watt output ; power bandwidth,
; IHFM music power output
35 to 20,00h
22 watts per
channel ; power output, rms, 20 watts per
channel ; harmonic distortion, 1% at 20
watts from 50 to 15,000 cps; IM distortion
1% at 20 watts ; hum and noise, 63 db below
cps
1
watt output ; sensitivity, input for rated
output- phono,
mv, aux. 0.1 volts ; damp
output impedances 4, 8, 16 ohms
3
ing factor 4 ;
high Z for recorder ; inputs
phono, 2 tape
head, f tape amp, 2 aux, f cer phono ; dimensions : 17 3/16" wide, 5 7/16" high, 13%"
deep ; weight, 35 lbs. Bell Sound Division,
Thompson Ramo Wooldridge, Inc., 6325 Huntley Rd., Columbus, Ohio.
-4
BOGEN
RP60 FM -AM Stereo Receiver. Combining
an FM -AM stereo tuner with an integrated
stereo preamplifier and 60 -watt amplifier. the
RP60, represents great flexibility in a single
unit. For FM broadcasts, the RP60 is equipped
with a "Stereo- Minder" indicator that lights
up when a station is transmitting in FM
stereo. For private enjoyment of stereo, the
RP60 has an outlet on the front panel for
stereo headphones. Elegant brushed gold finish
adds the decorator look to blend perfectly
with any decor.
4
I'
_
-
--_
ïiiïd7
-
\44
discriminator ; type of tuning indicator, dual
electron tube ; controls, tuning, loudness,
function, separate bass, treble, and loudness
for each channel ; switches, stereo /mono, reverse, visual balance, a.f.c., presence ; freq.
resp. ± 1 db from 20 to 20,000 cps ; sensitivity.
1 µv for 20 db quieting ; separation, 3.5 db ;
type of stereo circuit, sampling. AM : type of
circuit, superhet ; type of tuning indicator,
electron tube ; freq. resp., 20 to 8,000 cps ;
freq. resp. 20 to 25,000 cps ± 1 db at 25 watts
output ; power output, rms, 30 watts per channel ; harmonic distortion, 1% at 25 watts ;
inputs-2 phono, 2 tape amp, 4 aux ; dimensions, 16" wide, %" high, 13%" deep ; weight,
25 lbs. Price $319.95. Eric Electronics Corp.,
1832 Colorado Ave., Santa Monica, California.
1. Model 5760 MX, 10 /10 -w receiver..$199.95
FISHER
Specifications: FM : Tube /transistor complement 10 tubes and 6 diodes ; type of front
end grounded grid; no. of i.f. stages 3 ; type
of detector ratio detector ; type of tuning indicator electronic eye ; no. of outputs 5 ; controls program selector, mode, volume, balance,
bass, treble, power, tuning ; switches rumble
filter, scratch filter, loudness, tape monitor,
dynamic a./.c. stereo Jitter ; freq. resp. ±1 db
from 20 to 20,000 cps ; signal -to -noise ratio
60 db ; IHFM volume sensitivity ± 5 pro ; capture ratio 4 db ; selectivity 40 db ; IHFM
usable sensitivity 2.5 µv ; AM suppression 50
db ; harmonic distortion (100% mod.), 0.5 %;
stereo separation 30 db ; type of stereo circuit
time division; type of a.f.c. circuit reactance ;
drift 20 k.c. ; dimensions : 15 15/16" wide,
514" high, 15" deep ; weight, 28 lbs.
Other features : tape recording filter, agc.
avc, whistle filter. AM Tube /transistor complement 4 tubes and 1 diode ; type of circuit
super -het ; 3 gang tuning capacitor ; type of
detector diode ; no. of 1.f. stages 2 ; type of
tuning indicator electronic eye ; IHFM usable
sensitivity 10 lay; IIIFM volume sensitivity 10
ev ; freq. resp. ± 3 db from 30 to 5000 cps ;
harm. dist. 1 %.
Amplifier: Freq. resp. 20 to 30,000 cps ± 1
db at 2.5 watts output ; power bandwidth,
50 to 15,000 cps ; IHFM music power 30 watts
per channel ; power output, rms, 27 watts per
channel ; harmonic distortion, 0.6% at rated
output ; IM distortion 0.3% at 2.5 watts;
hum and noise, 50 db below 1 watt output ;
sensitivity, input for rated output -phono
4.5 mv, aux 0.5 volts; output impedances 4, 8,
and 16 ohms ; inputs 1 phono ; 1 tape head,
1 aux. Price, $299.95. Accessories : EN -7 metal
enclosure, $12.95 ; WE -7 Walnut enclosure,
$27.95. Bogen Communications Div. Lear
Siegler Inc., l'aramus, N. J.
1.
2.
RPF60 Stereo Receiver
RP100 -BM Monophonic Receiver
$279.95
186.60
ERIC
Model 5761 MX Deluxe AM /FM Stereo Receiver. Featuring a highly sensitive wide -band
tuner with built -in multiplex circuitry combined with a dual 30 -watt low-distortion
amplifier. It is sturdily built on a heavy -
gauge chassis, and components are worked
well within their rated capacity. It is styled
for flush -panel cabinet mounting, or in enclosures which are available for table top placement.
Specifications: Tubes, 19 ; transistors, 2;
diodes, 2 ; pwr diodes, 2 ; FM ; 1 tuned r.f.
stage ; no. of 1.f. stages, 3 ; type of detector,
AUDIO
Model 500 -12 65 -Watt FM- stereo Receiver.
Here on one integrated chassis is a wide -band
FM tuner, with built -in multiplex ; a stereophonic master control center ; and a 65 -watt
stereophonic amplifier. Simply add two speaker
systems to be ready for regular or stereo FM
broadcasts. Add a record player or tape recorder to round out the system. A switchable
filter reduces hiss and background noise on
FM- stereo programs without affecting the frequency response.
,4 b
1111011111111111111
.
O,p...
mod.) 0.5% ; stereo separation 30 db ; type of
stereo circuit bal. diode bridge switching, type
of a.f.c. circuit none ; drift 10 kc.
AM : Tube complement see above ; type of
circuit super het ; 3 gang; tuning indicator
eye tube ; controls see above ; switches see
above ; IHFM sensitivity 3 'iv; freq. resp.
± 3 db from 20 to 6500 cps ; harm. dist. 1 %.
AMPLIFIER : Freq. resp. 20 to 20,000 cps
±.5 db at 1 watt output ; power bandwidth,
30 to 20,000 cps ; IHFM music power output
35 watts per channel ; power output, rms, 30
watts per channel ; harmonic distortion, 2%
at 30 watts from 30 to 15,000 cps ; IM distortion 1% at 30 watts ; hum and noise, 66
db below 1 watt output ; sensitivity, input for
rated output-phono, 3 mv aux 0.25 volts;
damping factor 10; output impedances 4, 8, 16
mag. phono, 1 tape head, 1 aux.
ohms
Dimensions : 16%" wide, 6" high, 15" deep;
weight, 35 lbs. Price $299.95. Precision Electronics, Inc., 9101 King St., Franklin Park, Ill.
-1
1. 502M, 24 -w ster receiver
2. 510, 12 -w FM mono receiver
3. 511, 12 -w FM -AM mono receiver
$239.95
159.95
179.95
HARMAN -KARDON
Specifications: FM : Tube complement 19
tubes, 12 diodes, 2 silicon rectifiers ; type of
front end double triode; no. of 1.f. stages 4;
type of detector ratio ; no. of audio stages
14 ; type of tuning Indicator cathode ray
no. of outputs 2 for recording plus speakers;
;
controls-Front: Vol., Bai., [lass cf Treble,
Tuning ; Rear: Level, Phase Reverse; switches
-Selector, MPX Filter, Hi & Lo Filter, Tape
monitor Mono -Stereo, Loudness ; freq. resp.
± 1.0 db from 20 to 15,000 cps ; signal -tonoise ratio 70 db. r.f. ; IHFM volume sensitivity below noise level; capture ratio 2.5 db;
selectivity 55 db ; IHFM usable sensitivity
2.2 µv ; AM suppression 55 db ; harmonic distortion (100% mod) 0.5% ; stereo separation
35 db ; type of stereo circuit time -division
switching ; drift 15 kc.
AMPLIFIER : Freq. reap. 20 to 2.5,000 cps
± 1.5 db at 2 watts output ; power bandwidth,
16 to 32,000 cps ; IHFM music power output
32.5 watts per channel ; power output rms,
27 watts per channel; harmonic distortion
0.8% at 27 watts rms at 1000 cps ; hum and
noise, 80 db below full output ; sensitivity,
input for rated output -phono 3.3. mv, aux.
0.23 volts ; damping factor 10 ; output impedances 4, 8, 16 ohms ; inputs, 2 phono, 2
tape head, 2 tape amp, 2 aux ; dimensions ;
171/2" wide, 5%" high, 23r/." deep; weight
31 lbs. Price $359.50. Accessories : Wood or
Mahogany cabinets, $24.95. Fisher Radio
Corp., 21 -21 44th Drive, L.LC., N. Y.
I. 800 -B, AM -FM MPX 65 -w rec
$429.50
GROMMES
Model .500 Receiver. Stereo FM tuner with
AM, preamp and 70 -watt power amplifier on
one compact chassis. Has all of the new fea-
TA5000X, Stereo Festival 11. The TA5000X
combines an AM and FM- stereo tuner with a
50 -watt stereo amplifier on the same chassis.
The FM tuner is essentially the same as the
F500X "Award" FM- stereo tuner. The amplifier, however, is not shared, and its specifications are shown.
i
1
Specifications: Freq. resp. 12 to 70,000 cps
+ 1 db at 1 -watt output ; power bandwidth,
20 to 20,000 cps ; IIiFM music power output,
25 watts per channel ; power output, rms, 20
watts per channel ; harmonic distortion, 0.5%
at 10 watts from 20 to 20,000 cps ; IM distortion, 0.9% at 25 watts ; hum and noise, 85 db
below rated output; sensitivity, input for
rated output -phono, 2.0 mv, aux, 0.25 volts;
damping factor, 10 +; output impedances, 4, 8,
phono, 2 tape head,
and 16 ohms ; inputs
2 tape amp, 2 aux ; dimensions. 16" wide,
614" high, 131/4" deep ; weight, 40 lbs. Price,
$299.95. Accessories, VW80 walnut enclosure,
$29.95 ; CX80 cage, $12.95. Harman -Kardon,
Inc., Plainview, N. Y.
1. Model TA3000 X, "Stereo Recital II"
-2
30 -w rec
2. FA10, mono 10 -w rec
$239.95
114.95
41
AUGUST, 1962
AmericanRadioHistory.Com
v
KENWOOD
KW60 Stereo Receiver. This stereo tuneramplifier faithfully reproduces the entire
audio range and provides a compact and versatile unit for the most critical audiofan.
With AM, FM, and FM stereo available, together with all the requirements for audio control, the user has a wide range of sources at
his command.
'J
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O
/l J a
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re
©
Specifications: Tube complement (2) 6CA4,
6BA6, (5) 6AU6, (1) 6AL5, (3) 12AU7,
6AQ8, (4) 12A 17, (1) 6ßE6, (4) 7189,
(3) 0A81 diodes ; FM : type of tuning indicator meter; controls, FM tuning, AM tuning, AM selectivity, volume, basa, treble, balance, selector, mode ; switches, a.f.c. off/on,
loudness, scratch filter, rumble filter, speaker
on/off ; sensitivity 2 µv; other features. headphone jack on front panel. AM sensitivity 40
(t)
(t)
µv.
Amplifier
Freq. resp., IHFM music power
output 30 watts per channel ; power output,
rms, 24 watts per channel ; harmonic distortion, 1% at 24 watts ; sensitivity, input
for rated output -phono, 3 mv, aux. .07
volts; inputs -2 phono, 2 tape head, t aux;
:
dimensions, 19%" wide, 6" high, 13%" deep ;
weight, 37% lbs. Price $279.95. Kenwood Electronics, Inc., 212 Fifth Ave., New York 10,
N. Y.
suppression, 40 db ; harmonic distortion
(100% mod.) 1% ; stereo separation, 25 db ;
type of stereo circuit, matrix ; dimensions,
16- 7/16" wide, 4%" high, 13" deep ; weight,
39 lbs. AM -type of circuit, superhet with r.f.
amp ; 2 -gang tuning capacitor ; type of detector, infinite impedance ; no. of 1.f. stages,
1; type of tuning indicator, eye tube ; switches
-bandwidth selector ; IHFM usable sensitivity, 3µv ; freq. resp. ± 3 db from 20 to 10,000
cps ; harm. dist., 2 %. Amplifier : freq. reap.
35 to 16,000 cps ± 1 at 16 watts output ;
power bandwidth, 35 to 16,000 cps ; power
output. rms, 16 watts per channel ; harmonic
distortion, 1.5% at 16 watts from 25 to 15,000
cps ; IM distortion, 0.35% at 1 watt ; hum
and noise, 75 db below rated output ; sensitivity, input for rated output -phono, 2 mv,
lux, 0.2 volts ; output impedances, 4, 8, and
16 ohms ; inputs-2 phono, t tape head, 4
aux ; dimensions, 16 -7/16" wide, 4%" high,
13" deep ; weight, 39 lbs. Price, $129.95 kit.
Allied Radio Corporation, 100 N. Western
Ave. Chicago 80, Ill.
FM -AM-FM Stereo Receiver. A completely integrated receiver, the
LA -226 combines AM, FM, FM- stereo, and an
amplifier to make almost a complete system
at an unusually moderate price.
Specifications: FM : Tube complement 20
tubes plus 7 diodes ; no. of 1.f. stages 4; type
of detector ratio ; type of tuning indicator
meter ; no. of outputs 4 pair ; controls off/on,
blend, volume, concentric bass and treble,
balance, tuning ; switches selector, rumble
filter, loudness, FM, noise, scratch ; freq. resp.
± % db from 20 to 20k cps ; IHFM usable
sensitivity 3.5 µv ; harmonic distortion (100%
mod.) .7%; stereo separation 30 db. Other fea-
tures : stereo headphone jack, speaker phase
switch. AM : Tube complement (1) 6BA6, (1)
611E6, (1) diode ; 3 -gang tuning capacitor ;
type of detector diode; type of tuning indicator meter; Ampl : freq. resp. 20 to 50,000 cps
±2 db at 20 watts output; IHFM music power
output 20 watts per channel ; harmonic distortion, 1.5% at 20 watts from 20 to 20,000
cps; hum and noise, 60 db below 1 watt output ; sensitivity, input for rated output
phono, 2 mv, aux. 0.1 volts ; output impedances 8, 16 ohms ; inputs -map. phono, crystal phono; dimensions: 173((2" wide, 54"
high, 15" deep ; weight, 45 lbs. Price, $189.95
assembled. Lafayette Radio Electronics, 111
Jericho Turnpike, Syosset, L. I., N. Y.
-
KNIGHT -KIT
KN-45 AM -FM Stereo Receiver Kit. A single
low -cost unit containing a control center, a
32 -watt
stereo amplifier, and an AM -FM stereo
tuner.
Specifications: Tube complement -(1) 6BE6,
(6) 613A6, (2) 6AU6, (1) 6AL5, (1) EM84,
(1) 7025, (5) 15.417, (4) 7189, (1) 0234,
(1) 6ßY8 ; FM -no. of i.f. stages, 3 ; type of
detector, ratio ; type of tuning indicator, eye
tube ; controls-dual concentric bass and
treble, balance, volume, tuning ; switches
selector, power, stereo reverse, a.f.c. ; freq.
resp. ± 1 db from 20 to 20,000 cps; selectivity,
± 3 db ; IHFM usable sensitivity, 2.5 µv ; AM
-
signal -sampling multiplex circuit that assures
perfect stereo separation. Make stereo tapes
off the air using the tape output connections
(and tape recorders). The 610 has a tape monitor for making instantaneous comparison between the program being taped and the tape
itself. For FM listeners, probably the most
useful feature is the automatic FM- stereo indicator that immediately alerts you when a
station is broadcasting stereo. In black and
brushed gold styling, complete with cover.
40 -Watt
KLH
Specifications: Tuned r.f. stage, three f.f.
stages, wideband detector; a.f.c. and tuning
indicator not necessary because of circuitry ;
IHFM usable sensitivity, 2.5 µv; distortion
for 100% mod., 1 %. Amplifier : output, 3
watts, rms ; controls, power, tuning, volume,
and high-cut ; frequency response, matched
for fiat acoustic output from the system's
loudspeaker. Speakers : 2, high -excursion, in
4 -in. frame ; enclosure Fibreglas filled, sealed.
Furnished with 30 -ft. cord between speaker
and tuner -amplifier unit. Dimensions of each
cabinet: 10%" wide, 5%" high, 6 %" deep.
Price, $159.00. KLH Research and Development Corp., 30 Cross St., Cambridge 39, Mass.
PILOT
Model 610, 24 -Watt FM-mpx Stereo Receiver. Connect two speaker systems, turn on
the unit, and in seconds enjoy music broadcast in FM- stereo. The 610 utilizes Pilot's
LAFAYETTE
LA -226
Model 8 FM Receiving System. Housed on
two solid walnut cabinets -one for the tuner
and amplifier and the other for the speaker
system, the KLH Model 8 is a complete FM
receiving system, in spite of its compactness
and simplicity. The tuner is extremely sensitive and stable, and the amplifier- though
low- powered -is more than adequate in capacity, and is low in distortion. By designing
the amplifier to complement the frequency
response of the speaker, the entire performance can be engineered for optimum quality.
arch Electronics International, Inc., North
Hollywood. California.
$249.95
1. STA -260, 30/30 -w ster rec
109.95
2. MAT -120, 12 -w mono AM /FM rec
Specifications: FM : Tube complement (1)
EM -84, (1) ECC-85, (1) 60M8, (1) SEWS; no.
of I.f. stages t ; type of detector ratio ; no. of
audio stages 8; type of tuning indicator
eye tube; detector output signal 0.1 -2 volts;
controls tuning ; freq. resp. ± 1 db from 20 to
15,000 cps ; capture ratio 8 db ; alt. channel
selectivity 22 db ; IHFM usable sensitivity 4
µv ; AM suppression 40 db ; harmonic dis-
tortion (100% mod.) %To ; stereo separation
30 db ; type of stereo circuit signai sampling;
drift ± 30 kc ; Other features : built -in line cord antenna.
AMPLIFIER : Freq. resp. 10 to 25,000 cps
± 1 db at 1 watt output ; power bandwidth, 50
to 9000 cps; IHFM music power output 12
watts per channel ; power output, rms 10
watts per channel ; harmonic distortion, 1%
at 10 watts from 70 to 7000 cps ; IM distortion 2% at 6 watts ; sensitivity, input for
rated output -phono, 4 mv, aux, 0.1 volts;
damping factor, 3 ; output impedances, 8, 16
ohms; inputs-2 phono, 2 tape amp; dimen-
sions, 14%" wide, 4 %" high, 10" deep. Price,
$199.50. Pilot Radio Corp., 37 -06 36th St.,
L.I.C., N. Y.
1. Model 602MA, FM -mpx stereo re$249.50
ceiver with cover
2. Model 6025A, FM- mpx -AM stereo re299.50
ceiver with cover
3. Model 654M, FM -mpx stereo receiver
329.50
with cover
49.95
4. Mark III, FM tuner with cover
5. Model 2808, FM- stereo tuner with
99.95
cover
PIONEER
SM-Q 300 Receiver. The newly announced
Model SM-Q 300 is a deluxe model designed
MONARCH
Series 200M% AM- FM- Stereo Receiver.
Compact tuner -amplifier with complete control center for home stereo systems. Features
built -in AM and FM antennas, "center" channel output, and transistor preamps, and
housed in sparkling black metal cabinet with
gold finished escutcheon.
Specifications: Tube/transistor complement
(2) 6AQ8, (1) 6B56, (5) 6BA6, (4) 6BM8,
(1) 12A 1C7, (1) 12AU7, (1) 5AR4, (1) 6RE13,
(4) 28B75, (3) 0A70, (2) 0A79 ; FM : type
of detector Foster -Seely; controls, dimension,
mode, selector, bass, treble, balance, volume,
tuning ; switches, power, phase reverse, loudness, scratch, rumble; sensitivity t µv for 20
db quieting, (100% mod.) AM : sensitivity 13
µv ; Freq. resp. 20 to 50,000 cps ± 1 db ;
power outputs, rms, 16 watts per channel ;
hum and noise, phono, 65 db ; tuner,
70 db sensitivity, input for rated output
phono, 3.5 mv, aux. 170 mv ; output impedances 4, 8, 16 ohms and center ; inputs
phono, (t low, 2 high) 2 tape amp, 2 aux, t
mic ; dimensions, 16 %4" wide, 5%" high, 13%"
deep; weight, 26.4 lbs. Price, $199.95. Mon-
-
-4
with care. It includes such features as tuners
capable of receiving all types of radio broadcasting, output of 40 (20 + 20) watts, many
auxiliary circuits, and so on.
Specifications: FM : Tube complement 19
tubes, 6 diodes; no. of i.f. stages 3 ; type of detector Foster-Seely; no. of audio stages 5 ;
type of tuning indicator eye tube; output signal 10 volts ; no. of outputs 2; controls bass,
treble, mode, blend, balance, volume, loudness;
switches power, selector A, selector B, rumble
filter, scratch, whistle; signal -to -noise ratio
30 db; IHFM usable sensitivity 10 µv; harmonic distortion (100% mod.) 1%; stereo
separation 45 db.
AM : Tube complement, 6 tubes 2 diodes ;
type of circuit Superhet. ; 2 -gang tuning capacitor; type of detector diodes ; no. of i.f.
stages 2; type of tuning indicator eye tube;
IHFM usable sensitivity 100 µv.
AMPLIFIER: Freq. resp. 20 to 50,000 cps
±1 db at .05 watts output; power bandwidth,
20 to 50,000 cps; IHFM music power output
20 watts per channel ; power output, rms, 15
watts per channel ; harmonic distortion, 1%
at 35 watts at 1 k cps ; IM distortion I% at
AUDIO
42
AmericanRadioHistory.Com
AUGUST. 1962
15
watts sensitivity, input for rated output
;
-
phono, 3.4 mv, aux. 180 mv ; output impedances
4, 8, 16 ohms; inputs per channel 5 phono, t
tape head, 1 aux. I rate; dimensions, 18'x"
wide, 5%" high, 13%" deep ; 35.3 lbs. Pioneer
Electronic Corp., 5 Otowacho 6- chome, Bunk.
yoku, Tokyo, Japan.
1. AFT -12, FM -AM -SW stereo tuner
2 SM -B 200A, 28 -w stereo
3. SM -G 204, 32 -w stereo
4. SM -W 203, OTL stereo
5. FM -B 100, 10 -w mono
REALISTIC
STA -7 FM -Mpz f4 -Watt Stereo Receiver.
FM- etereo reception plus a 24 -watt etereo
amplifier characterize the STA -7 as a complete receiver for FM broadcasting.
Specifications: FM : Tube complement (4)
6,408, (3) 6BÁ6, (t) 1EA %7, (4) 6BM8,
(1) 5A4 ; type of front end grounded -grid
r.f. amp. ; no. of 1.f. stages 2; type of detector ratio ; no. of audio stages I2; controls
tuning, tone, volume, balance, blend, separation, hum, balance; switches a.f.c. -on /off,
power, loudness, function selector, phase;
freq. resp. ±t db from 30 to 15k cps; signalto -noise ratio 50 db ; IHFM volume sensitivity
4 µv ; IHFM usable sensitivity 5 µv ; harmonic
distortion (100% mod.) 0.8% ; stereo separation 27 db; type of stereo circuit carrier
injection; type of a.f.c. circuit reactance diode; dimensions : 16" wide, 5" high, 11 %"
deep ; weight, 32 lbs. Other features : convenience outlet, stereo headphone jack on
front panel, center -channel output.
Amplifier : Freq. resp. 20 to 20k cps ± 1 db
at 1 watts output ; power bandwidth, 40 to
15 cps; IHFM music power output 13 watts
per channel ; power output, rms, 12 watts per
channel ; harmonic distortion 1% at 8 watts
from 40 to 15k cps ; IM distortion 1% at 12
watts ; hum and noise, 51 db below 1 watt
output ; sensitivity, input for rated output
phono, 5 mv, aux. 0.65 volts ; damping factor
10; output impedances 4, 8, 16 ohms; inputs
4 phono, 2 aux ; dimensions as above. Price
$124.95. Radio Shack Co., 730 Commonwealth
Ave., Boston 17, Mass.
-
H. H. SCOTT
340
60 -watt
Stereo Multiplex Tuner/Am-
plifier. A sensitive wide-band FM-Multiplex
tuner, a complete stereo control center, and
60 -watt power amplifier all on one compact
chassis. Unique "Sonic- Monitor" tunes to the
tone to tell you audibly when FM- stereo programs are on the air. If you do not require
AM, the 340 provides all the outstanding performance of the 350 and an amplifier providing full power down to 20 cps. The 340
offers superb performance and amazing flexibility at modest cost.
ing factor 16 ; output impedances 4, 8, 16
ohms ; inputs
phono, 1 tape bead, 1 tape
amp, 1 aux. 1 (other) ; dimensions, 173/1"
wide, 61" high, 161" deep, weight, 37 lbs.
Price, $379.95. Accessories : cases in various
woods and metal from $17.95. H. H. Scott,
Inc., 111 Powdermili Road, Maynard, Mass.
1. 355 AM -FM Multiplex tuner, preamp $334.95
-4
SHERWOOD
S -8000 FM- Stereo 64-watt Receiver. This
unit contains all of the electronics for a
complete home-music system on a single compact chassis. The S -8000 features two 32 -watt
amplifiers, complete with dual preamplifiers
for phono and tape plus a highly sensitive
FM tuner with complete wired -in circuitry
for receiving FCC-approved FM multiplexed
stereocasts. Just add speakers to complete
your stereo home hi -fi music system.
BOGEN
studio -quality performance. Complete
with integrated tone arm, tracks as low as 1.5
grams. Precise automatic cueing and continuously variable speed are two features of the
less,
BOl.
Specifications: Speeds 78, 45, 33%, 16 rpm
plus continuously variable 29 -80 rpm drive,
four -pole motor; turntable diameter, 12 ";
turntable weight, 7% lbs. spindle shaft diameter, 9/32" turntable material zinc alloy
;
Specifications: FM : Tube /transistor complement 21 tubes, 4 silicon rect., 4 diodes ;
type of front end cascode ; no. of i.f. stages t ;
type of detector discrim ; no. of audio stages
t ; type of tuning indicator EM84 split bar eye;
output signal 1.5 volts; no. of outputs stereo
pair ; controls FM- tuning, loudness, stereo balance, hush, bass, treble, phono gain; switches
a.f.c. off-on, hi- filter, lo-filter, phanae rev, tape
monitor, loudness contour; freq. resp. ± 1/
db from 20 to 20k cps ; signal -to -noise ratio
55 db; capture ratio 4 db; IHFM usable sensitivity 1.9 µv; harmonic distortion (100%
mod.) 1/4%; stereo separation 40 db ; type
of stereo circuit phase loaded ose. and bal.
synch. detector ; type of a.f.c. circuit reactance tube ; drift 25 kc. Other features,
"interchannei hush" or noise squelch, flywheel tuning.
Amplifier : Freq. resp. 20 to 20k cps
± % db at 30 watts output ; IHFM music
power output 32 watts per channel ; power
output, rms, 30 watts per channel ; harmonic
distortion, %% at 30 watts; hum and noise,
75 db below 1 watt output ; sensitivity, input
for rated output-phono, 1.t mv, aux. %
volts; damping factor 5; output impedances
4, 8, 16 ohms ; inputs -stereo phono, stereo
tape head, stereo tape amp, stereo aux. Dimensions, 16 %" wide, 41f," high, 14" deep;
weight, 34 lbs. Price $299.50. Accessories, case,
$7.50. Sherwood Electronic Labs, 4300 N.
California Ave., Chicago 18, Ill.
WITH ARMS
AUDIO
number of mounting screws for cartridge, t
plus spares; mounting dimensions, adjustable;
number of leads to head, 4 ; number of leads
to chassis, 5. Price $58.00. Acoustic Research,
Inc., 24 Thorndike St., Cambridge, Mass.
Miscellaneous 19A1
B61 Turntable. Precision made to give noise-
TURNTABLES
Specifications: FM : Tube complement 18
tubes, 13 diodes; type of front end cascode;
no. of if. stages s ; type of detector ratio ;
no. of audio stages 3; type of tuning indicator
meter; controls tuning; switches "Sonic Monitor," age ; freq. resp. ± 1 db from fo to 20k
cps ; signal-to -noise ratio 60 db ; capture ratio
6.0 db; selectivity 35 db ; IIIFM usable sensitivity 2.5 µv ; AM suppression 55 db ; harmonic distortion (100% mod.) 0.5% ; stereo
separation 35 db ; type of stereo circuit time
switching ; drift 0.02 %. Other features sub channel noise filter, switchable a.y.c.
Amplifier : Freq. resp. 20 to 20 k cps
±1 db at 10 watts output ; power bandwidth,
19 to 25 k cps ; IHFM music power output 30
watts per channel ; power output, rms, 26
watts per channel ; harmonic distortion 0.8%
at 10 watts from 20 to 20 k cps; IM distortion
0.5% at 10 watts ; hum and noise 80 db below
1 watt output ; sensitivity, input for rated
output -phono, 3 mv, aux. 0.5 volts; damp-
11111111,11-
ACOUSTIC RESEARCH
Single-Speed Turntable. This turntable is
Acoustic Research's first product outside of
the loudspeaker field. A single -speed (33%rpm) turntable, it comes complete with arm,
oiled walnut base, transparent dust cover,
cables, and even an overhang adjustment device and stylus -force gauge. Manufacturer
states that a condition of sale is that these
turntables meet NARTB specifications for
broadcast equipment on wow, flutter, rumble
and speed accuracy.
Specifications: Speeds 33% rpm, belt drive
permanent magnet synchronous motor : turntable diameter, 11 11/16" ; turntable
weight, 3.3 lbs; shaft diameter .375" ; turntable material aluminum; mat polyurethane;
wow, 0.15% ; flutter, 0.05% ; dimensions of
chassis, 12% x 16% "; clearance required
above mounting board, 2 9/32" ; below, 2% ;
type of mounting, spring; controls, on -of;
pickup head, universal; material, Acrylic;
AUGUST, 1962
;
;
;
mat, rubber; wow, less than 0.2% ; flutter, lees
than 0.2% ; dimensions of chassis, 15% x
13%" ; clearance required above mounting
board, 21/," ; below, 21/4" ; type of mounting,
spring ; controls, speed, on -off play ; pickup
head plug -in ; material, aluminum ; number of
mounting screws for cartridge, 8 screws enclosed ; mounting dimensions, 15 "w x 13 "d ;
number of pins (plug -in) to head, 4 ; number
of leads to chassis, 3 (2 shielded) ; accommodation for different record sizes, 45 -rpm
adapter. Price $59.95. Accessories : extra
heads, $4.00; PB6 wood base $5.25. Bogen
Communications Div. Lear Siegler Inc., Paramus, N. J.
DUAL
Four -Speed Changer -Turntable. The Dual1006 "Custom" is a combination record
changer and turntable offering four -speed operation. The "roller- feeler" record indexing
action permits intermixing of any size records
for completely automatic operation. A shaded
four -pole induction motor is used which goes
from rest to correct speed in one -quarter of a
revolution. The platter is laminated and concentrically girded for increased rigidity. The
one -piece tone arm tracks and trips at 2 grams
and is adjustable for a wide range of tracking
forces. The arm has a built -in tracking -force
gauge. A lock -in cartridge holder is provided
for use with all standard cartridges. Built -in
stereo mono switch.
Specifications: Speeds 16 %, 333§, 45, 78
rpm ; idler drive ; 4 -pole motor ; turntable diameter. 10.6" ; turntable weight, 3.75 lbs ;
shaft diameter %" ; turntable material steel;
wow, 0.25% : flutter 0.25% ; dimensions of
chassis, 131/4"x 1074" ; clearance required
above mounting boards, 3% " ; below 3 "; type
of mounting spring ; controls (3) pushbuttons;
automatic cycling time, 12 secs at 33% rpm.
12 secs at 78 rpm ; type of pickup head
interchangeable cartridge holder; material
plastic ; number of mounting screws for cartridge, t ; mounting dimensions, std ; number
of leads to head, 4 ; number of leads to chassis,
4: accommodation for different record sizes,
all sizes intermixed 7 " -12". Price $79.95. Accessories : extra cartridge holders $2.10, 45rpm auto spindle $4.80. United Audio Products, 12 W. 18th Street, N.Y. 11, N. Y.
43
AmericanRadioHistory.Com
ESL
Type 71 Concert Series Playback Unit. This
superb system consists of an ESL T200 Gyro/
Spenslon 4 -speed turntable, an ESL S2000
Gyro /Balance arm, and an ESL Redhead cartridge wired and assembled on n lustrous
oiled walnut base, ready to play.
Specifications: Speeds -78, 45, 33',x, 162,
rpm ; type of mounting, oiled walnut base :
pickup head, plug -in ; material, aluminum.
Price, $119.45. Electro -Sonic Laboratories,
Inc., 627 Broadway, New York 12, N. Y.
1. Type 71H, same as 71, with hys /sync
motor
$139.45
2. "Jewel Box" dust cover
19.95
GARRARD
Type A Automatic Turntables. A dynami-
cally balanced (counterweight adjusted) tone
arm with a turntable, the Garrard Type A
Automatic Turntable provides the convenience
of a changer. The turntable platter is cast,
weighted, and polished. The tone arm is adjustable by means of a sliding counterweight.
At this point the arm is in gyroscopic balance. Tracking force is adjusted by means
of a calibrated gauge on the side of the arm.
Utilizing the pusher -platform changing mechanism exclusive with Garrard, the Type A operates as a fully automatic changer when
desired.
to chassis, 5 ; accommodation for different
record sizes, 7, 10, 12 ". Price $59.50. Accessories ; extra heads, double $4.81 ; single $2.43.
Glaser Steers Inc., 155 Oraton St., Newark,
N.
J.
1. GSB,
base ebony finish
2. GSBW, base, oil finish, solid walnut
3. GSC, lucite cover
4. GSS, automatic 45 -rpm spindle
$
9.60
13.20
9.75
2.95
KLH
Model Eleven Stereophonic Portable Phonograph. Comprising some of the engineering
features of the well -known KLH loudspeaker
systems with some newly engineered transistorized amplifier equipment and a Garrard AT -6 record changer with a Pickering
380C magnetic cartridge, the Model Eleven
brings console quality into the portable
1.
1.
2.
N. Y.
AT6 Automatic turntable, 4 -speed dy-
namically balance tonearm
Autoslim /P Auto- manual,
changer
$54.50
intermix
39.50
GLASER-STEERS
GS77T Record Changer. Featuring the exclusive "Turntable Pause" which allows a pause
during the change cycle and resumes action
only after the next record has come into
play position and stylus is in lead -in groove
of record. This eliminates record surface wear
caused by grinding action of record dropping
on moving disc.
Specifications: Speeds, 16%, 33%, 45, 78
rpm ; idler rim drive ; 4 -pole induction motor ;
turntable diameter, 11" ; turntable weight
2
lbs ; shaft diameter %" ; turntable material steel; mat rubber; wow, 0.15% flutter,
0.03% ; dimensions of chassis, 13% x 12" ;
clearance required above mounting board,
51,E ", below S"; type of mounting spring ;
controls, concentric knob and lever ; automatic cycling time, 9 secs at 33% rpm, 9
secs at 78 rpm ; number of mounting screws
for cartridge 2 ; mounting dimensions, 1,4" ;
number of leads to head 4 ; number of leads
14.95
29.50
NEUMANN
PA -fa Turntable and Automatic arm. De-
field for the first time. The detachable speakers may be separated up to 40 feet with the
cables furnished. The case is molded of high -
LAFAYETTE
Port Washington,
Miracord Studio, Model 10, 4 -pole
motor
$89.50
9.95
2. Walnut base for above
3. Miracover, dust cover
4. Carrying case
Impact vinyl -clad "Contourlite," and is small
enough to fit under the seat of a jetliner. The
two loudspeaker enclosures attach firmly to
the ends of the case for transport. The transistorized amplifier has an output of 15
watts (total) music power. Dimensions : 24"
long, 14" deep, 7" high ; weight, 26 lbs. Price,
$199.00. KLH Research and Development
Corp., 30 Cross St., Cambridge 39, Mass.
Specifications: Speeds -33, 45, 78, 16%
rpm ; rim drive ; 4 -pole shaded motor ; turntable diameter, 10 %" ; turntable weight, 6
lbs ; turntable material, aluminum; mat, rubber ribbed ; dimensions of chassis, 16%" x
14%" ; clearance required above mounting
board, 6" ; below 2%" ; type of mounting, adjustable leveling springs ; controls, manual and
auto on/off ; automatic cycling time, 10 secs
at 33',(T rpm, 3% sec at 78 rpm ; type of
pickup head, plug -in 4 pin ; material plastic;
number of mounting screws for cartridge, 4 ;
mounting dimensions, %" ; number of leads
to head, 4 ; number of leads to chassis, 5 ;
accommodation for different record sizes, yes.
Price $79.50. Accessories extra heads $1.50.
Garrard Division, British Industries Corp.,
ard" : number of leads to head, 5 ; number of
leads to chassis, 4 ; accommodation for different record sizes, 7 ", 10 ", 12 ". Price $99.50.
Acessories : extra heads, $3.50; auto 45 spindle, $5.00. Benjamin Electronic Sound Corp.,
97 -03 43 Avenue, Corona 68, N. Y.
I'K- 4491VX Turntable and Tone Arm. Designed and built to meet professional standards, the PK -449 combines on a single mounting plate a four -speed turntable and tone
arm designed to complement each other. The
turntable is constructed with a permanently
lubricated oilite bronze bearing and the speed
control allows 0.7% speed variation. The arm
starts the motor when it is lifted.
Specifications: Speeds-16 %, 33%, 45. 78
rpm ; rim drive ; 4 -pole induction motor ; turntable diameter, 12" ; turntable weight, S lbs ;
turntable material, aluminum ; mat, rubber;
wow, 0.2%; flutter. 0.2% ; dimensions of
chassis, 161/2"x 12%"; clearance required below mounting board, 4" ; controls, power (on
arm), speed ; type of pickup head, plug -in ;
material, aluminum ; number of mounting
screws for cartridge, std ; mounting dimensions, std. ; accommodations for different
record sizes, 45 -rpm adapter. Price, $49.50.
Accessories ; extra heads, $1.69 ; PK-504W
wood base $9.95. Lafayette Radio Electronics.
111 Jericho Turnpike, Syosset, L. I., N. Y.
1. PK -160 SW, 4 -speed turntable w /arm .$26.95
signed as a playback system for the Neumann
record- cutting lathe, the l'A -2a is a fully professional integrated turntable and arm. Same
unusual features are its small size, automatic
cueing and cut -off.
Specifications: Speeds- 33%/s, 45 rpm ; belt
and puck drive ; hysteresis motor ; turntable
diameter 12 ; turntable weight 8 lbs ; shaft
diameter W' ; turntable material aluminum ;
mat rubber; wow and flutter peak to peak
0.15% ; dimensions of chassis, 14.5" x 12" ;
clearance required above mounting board 4.5 ",
below 3.25" ; type of mounting 4 rubber
shocks; controls, speed, arm lower and lift ;
type of pickup head Neumann DST -62 plug -in ;
number of leads to head 5 ; number of leads
to chassis, 3 ; accommodation for different
record size, up to 131/2". Price $450.50. Accessories, extra head, $79.50. Gotham Audio
Corp. 2 West 46th Street, N. Y. 36, N. Y.
REK -O -KUT
Rondine 2, Model R320.4. The model R320A
is a single -play turntable with fully automatic
operation. It combines the single -play turn-
table with Rek-O -Kut's automatic tonearm,
the "Auto -Poise." Two motors, each of which
has a separate and distinct function, are used.
A custom -built hysteresis -synchronous motor
drives the turntable. The sole function of this
motor is to drive the turntable at absolutely
constant and accurate speed. A second synchronous "Auto- Poise" motor actuates the
tonearm.
MIRACORD
1011. Featuring a hysteresis
motor for accurate speed control, the Mira cord "Studio -H" is intended to combine the
convenience of a record changer with the accuracy of a turntable. In addition, the tone
arm is of the quality normally found on turntables. The one -piece turntable platter is dynamically balanced. Automatic changing is
accomplished by means of the "Magic Wand"
spindle. Record -size selection and actuation of
automatic operation is accomplished by means
of pushbuttons.
Studio H Model
Specifications: Speeds -78, 45, 33%, 16%
rpm ; puck drive ; hysteresis motor ; turntable
diameter, 12" ; turntable weight, 6 lbs; turntable material, non -ferrous; mat, rubber; wow,
less than 0.1% ; flutter, less than 0.1% ; dimensions of chassis, 14% x 123/2" ; clearance
required above mounting board, 5% " ; below,
33'4 "; type of mounting, spring; controls,
pushbutton; pickup head, plug -in; material,
plastic shielded; number of mounting screws
for cartridge, 2 ; mounting dimensions, stand-
Specifications:
Speeds -33%
AmericanRadioHistory.Com
belt
12" discs only. Price, $169.95. Rek -O -Kut Co.,
Inc., 38 -19 108th St., Corona 68, N. Y.
$129.95
1. R 320, with manual tonearm
AUDIO
44
rpm ;
drive; hysteresis -synchronous motor ; turntable diameter, 12 "; turntable weight, 41/4 lbs;
shaft diameter, %" ; turntable material, cast
aluminum ; mat, ridged rubber; wow and flutter, 0.15% ; dimensions of chassis, 14% x
14% "; clearance required above mounting
board, 3%" ; below, 41/2"; type of mounting,
springs ; controls, pushbutton ; type of pickup
head, universal; material, cast aluminum;
number of mounting screws for cartridge, t;
mounting dimensions, 1/2" ; number of leads to
head, 4 ; number of leads to chassis, 5 ; accommodation for different record sizes, standard
AUGUST, 1962
r
FREQUENCY IN CYCLES PER SECOND
.-
rtaeL
e_
3 E
e
t
n 2
L
f
s
THIS IS THE RECORDED FREQUENCY RESPONSE
CURVE OF A REJECTED AR -3 MID -RANGE TWEETER
Although this curve does not depart from the ideal
by more than 2 decibels at any point, the sharp peak at 11,500
cycles is evidence of transient distortion.
The frequency response of all AR -3 tweeters and AR-2a super- tweeters is recorded aid examined critically before
installation. One out of fifteen never makes it to the cabinet.
speakers are priced from $89 to $225. They may be heard at AR Music Rooms, in the west balcony of Grand
Central Terminal in New York City, and at 52 Brattle Street in Cambridge, Massachusetts. No sales are made or
AR
initiated at these showrooms.
Literature, including
a
list of
AR
dealers in your area, is available for the asking.
ACOUSTIC RESEARCH, INC., 24 Thorndike Street, Cambridge 41, Massachusetts
AUDIO
AUGUST, 1962
45
AmericanRadioHistory.Com
THORENS
TD -135 Turntable and Arm. For the first
time Thorens makes available a new professional quality 4 -speed turntable with a professional type (Model BTD -12S) tone arm
mounted as an integral part. Now enjoy the
finest sound reproduction almost immediately
after opening the box. A simple installation is
required to install the cartridge and plug the
leads into your amplifier. The TD -135 incorpo-
rates all the precision workmanship and design that has made Thorens turntables famous
the world over.
clearance required above mounting board
2% ", below 31/x" ; type of mounting brackets
and shock mounts ; controls power ; provision
for arm mounting pre -drilled; over -all weight,
20 lbs. Price $100.00. Accessories, walnut base
BW /208, $15.00. Empire Scientific, 1075
Stewart Ave., Garden City, N. Y.
1. Empire 398 Troubador System (turn-
table, arm walnut base)
$175.00
2. Empire 388 Troubador System (turntable arm) less base
160.00
3. Empire 498 Troubador System (turntable arm, walnut base)
165.00
4. Empire 488 Troubador System (turntable arm) less base
150.00
FAIRCHILD
Single -Speed Turntable, Model 412 -1A. The
412 has a double -belt drive system for reducing rumble and wow and flutter to the lowest
possible levels. Also the double -belt system
allows more gradual step -down ratios between
motor and turntable. The double-belt 412 has
two step-down ratios of 1 :4 and 1 :13.5.
These two gradual step -down ratios, instead
of one severe stepdown, account for the
wow and flutter characteristics of the 412.
Specifications: Speeds -16 %, 33%, 45, 78
rpm ; rim drive ; 4-pole induction motor ;
turntable diameter, It" ; turntable weight,
3 lbs ; turntable material, aluminum ; mat,
rubber; wow, 0.2 %; flutter 0.2% ; dimensions
of chassis, 121/*" x 101/2" clearance required
above mounting board, 1%" ; below, 4" ; con-
trols, speed, power ; provision for arm mounting, none ; over -all weight, 14 lbs. Price,
$37.50. Lafayette Radio Electronics, 111 Jericho Turnpike, Syosset, L. I., N. Y.
NEAT
P -88 Four-Speed Transcription Turntable.
The Neat P -88 is a four -speed turntable with
a rugged induction motor. A separate board
is provided on which the tone arm can be
mounted, and this board is replaceable so that
it is possible to interchange or upgrade tone
arms easily. Neat products are available
through a variety of sources in the United
States -write to the manufacturer for infor-
mation.
-I6,
Specifications: Speeds
33, 45, 78 rpm ;
belt and idler wheel drive ; induction 4 -pole
motor ; turntable diameter, 12" ; turntable
weight, 8 lbs ; shaft diameter, %" ; turntable
material, zinc ; mat. rubber ; wow and Butter,
below NAB specs ; dimensions of chassis, 15" x
12" ; clearance required above mounting board,
3" ; below 21/4" ; type of mounting, rubber
grommets ; controls. 4 ; type of pickup head,
metal, plug -in ; material, aluminum ; number
of mounting screws for cartridge, assorted;
mounting dimensions, standard ; number of
leads to head, 4 ; number of leads to chassis,
5. Price, $110.00. Accessories, extra heads,
$3.00 ; wood base $7.00. Elpa Marketing Industries, Thorens Bldg., New Hyde Park. N.Y.
TURNTABLES
WITHOUT ARMS
Specifications: Speeds 331,5 rpm ; belt drive ;
synchronous motor ; turntable diameter 12"
turntable weight 8 lbs ; shaft diameter, 1/4"
turntable material aluminum, densite filled ;
mat moulded; wow, 0.10% flutter; 0.t0%
dimensions of chassis, 15" x 1714" ; clearance
required above mounting board, 11/* ", below
514" ; type of mounting wood screws; controls
ON-OFF; over -all weight, 15 lbs. Price $95.00
assembled ; $74.95 kit. Accessories. 412BF
Walnut base formica top, $23.95. Fairchild
Recording Equipment Corp., 10-40 45th Ave.,
L. 1. C., N. Y.
440 two -speed 4 -pole motor turntable $ 69.95
2. 440 kit
58.00
3. 750 professional 3 -speed turntable
485.00
4. 530G professional 3 -speed gear-driven
table
725.00
1.
EMPIRE
Model 208 " Troubador"
3 -speed turntable.
The Empire "Troubador," Model 208 is a belt
driven 3 -speed turntable. Each motor and
each turntable are individually adjusted to
perfect dynamic balance. Complete rumble
isolation is provided by the motor suspension,
flexible belt driven and the resilient nylon
"seat" which supports and cushions the thrust
of the main bearing. A case- hardened, lapped
steel shaft fits precisely into the bearing well
(honed to a micro finish)
hard steel
polished ball on the underside of the shaft
rests on the nylon seat.
-a
CRAY
PK -33 Turntable Kit. The Gray PK -33
utilizes a hysteresis-synchronous drive motor
for speed constancy and a polyurethane belt
to reduce wow and flutter. Rumble is reduced by the use of oilite bearings with lifetime lubrication. The manual is clearly written to facilitate assembly by even the inexperienced.
Specifications: Speeds-331/4 rpm ; belt
drive; hysteresis synchronous motor; turntable diameter, 11%y" ; turntable weight, 4
lbs; shaft diameter, 1" ; turntable material,
aluminum mat, latex -cork ; wow, 0.2%;
flutter, 0.08% ; dimensions of chassis, 9 by
9" ; clearance required above mounting board,
2"; below, 5" type of mounting, screws ;
controls, on -off ; provision for arm mounting,
none required ; over -all weight, 8% lbs. Price,
$49.50 kit. Accessories, TRA -Base $19.95. Gray
Research and Development Co., Box 12, Elwood, Conn.
;
LAFAYETTE
Specifications: Speeds 331,5, 45, 78 rpm ;
belt drive ; hysteresis motor ; turntable diameter, 12" ; turntable weight, 6 lbs ; shaft
diameter, 1/4" ; turntable material aluminum ;
mat rubber ; wow, 0.03 %, flutter 0.02%;
dimensions of chassis. 14 11/16 x 16 11/16" ;
Specifications: Speeds -78, 45, 331, 18%
rim drive ; C -8tart induction motor ;
;
turntable diameter, 13" ; turntable weight,
3.6 lbs ; shaft diameter, std. ; turntable material, pressed aluminum, cast iron ; mat,
rubber ; wow, 0.2% ; flutter, 0.6% ; dimensions
of chassis, 18% x 15" ; clearance required
above mounting board, 2.5" ; below, 3%" ;
type of mounting, round head screw fitting ;
controls, magnetic brake; provision for arm
mounting, mounting board ; over -all weight,
11 lbs. Neat Onkyo Denki Co., Ltd., No. 4, 1chome, Kanda Hatago -cho, Chiyoda -ku, Tokyo,
Japan.
rpm
PK -240W 4 -Speed Transcription Player.
Well suited for stereo, the PK -240W is a
4 -speed transcription player with a rim weighted turntable and a rumble and noise
figure 50 db below average recorded level.
Each speed is variable within 7% of the
nominal value through a magnetic eddy -current brake.
46
REALISTIC
It
Professional Turntable. The Mark
12 is a single -speed turntable driven by two
hysteresis-synchronous motors. Because of its
suspension it is not affected by extreme vibration.
Specifications: Speeds -331,§ rpm, direct
drive; t hysteresis synchronous motors ; turntable diameter, 12L" ; turntable weight, 1% lbs ;
shaft diameter, 1/ö" ; turntable material aluminum ; mat ribbed rubber ; wow, 0.05%
dimensions of chassis, 15" x 16" ; clearance
required above mounting board, VA" ; below
t "; type of mounting sponge rubber suspension; controls power ; provision for arm mounting yes ; over -all weight, 6 lbs. Price $49.95.
Radio Shack, 730 Commonwealth Ave., Boston
Mark
17, Mass.
REK-O-KUT
Rondine 2, Model R Turntable. The Rondine
2 is a single-play turntable driven by a hysteresis- synchronous motor at constant speed
reduce wow and flutter.
through a belt
Specifications: Speeds-331/4 rpm ; belt
drive; hysteresis -synchronous motor; turntable diameter, 12" ; turntable weight, 41/4 lbs;
shaft diameter, %(3" ; turntable material, cast
aluminum ; mat, ridged rubber ; wow, and
flutter 0.15% ; dimensions of chassis, /41/4 x
/4%"; clearance required above mounting
board, 31/j- ; below, 41/4" ; type of mounting,
spring -mounts ; controls, pushbutton ; provision for arm mounting, predrilied ; over-all
weight, 10 lbs. Price, $79.95. Rek -O -Kut Co.,
Inc., 38 -19 108th St., Corona 68, N. Y.
1. B -12H, 3 -speed professional
$149.95
109.95
2. B -12GH, 3 -speed
-to
3. N-3481, 33 1/3 and 45 rpm
4. K-34H, 33 1/3 and 45 -rpm
5. K -33H, 33 1/3 -rpm kit
AUDIO
AmericanRadioHistory.Com
kit
89.95
69.95
59.95
AUGUST, 1962
Can You Afford 15 Hours to Build
The World's Best FM /Multiplex Tuner?
Fifteen hours. That's all it takes to build the world's best
FM /Multiplex tuner.
Citation has the "specs" to back the claim but numbers alone
can't tell the story. On its real measure, the way it sounds,
Citation III is unsurpassed. And with good reason.
After years of intensive listening tests, Stew Hegeman, director
of engineering of the Citation Kit Division, discovered that the
performance of any instrument in the audible range is strongly
influenced by its response in the non -audible range. Consistent
with this basic design philosophy the Citation III has a
-
frequency response three octaves above and below the normal
range of hearing. The result: unmeasurable distortion and the
incomparable "Citation Sound."
The qualities that make Citation III the world's best FM tuner
also make it the world's best FM /Multiplex tuner. The multiplex
section has been engineered to provide wideband response, exceptional sensitivity and absolute oscillator stability. It mounts
right on the chassis and the front panel accommodates the
adapter controls.
What makes Citation III even more remarkable is that it can
be built in 15 hours without reliance upon external equipment.
To meet the special requirements of Citation III, a new FM
cartridge was developed which embodies every critical tuner
element in one compact unit. It is completely assembled at the
factory, totally shielded and perfectly aligned. With the cartridge as a standard and the two D'Arsonval tuning meters, the
Build the Very Best
problem of IF alignment and oscillator adjustment are eliminated.
Citation III is the only kit to employ military -type construction. Rigid terminal boards are provided for mounting components. Once mounted, components are suspended tightly between
turret lugs. Lead length is sharply defined. Overall stability of
the instrument is thus assured. Other special aids include packaging of small hardware in separate plastic envelopes and
mounting of resistors and condensers on special component cards.
For complete information on all Citation kits, including reprints of independent laboratory test reports, write Dept. A8,
Citation Kit Division. Harman -Kardon, Inc.. Plainview, N. Y.
The Citation III FM tunes-hit, $149.95; ,used, $229.95. The
Citation III MA multiplex adapter -factory wired only, $79.95.
kit, $219.95,
The Citation IH X ;'ntegrated multiplex tuner
factory wired, $299.95. All prices slightly higher in the West.
-
The
Citation
III
CITATION KITS by
AmericanRadioHistory.Com
harman kardon
4
THORENS
Transcription Turntable. Engineered for
the finest music systems, the Thorens Model
TD -124 1s a four -speed machine featuring a
full 12 -inch, 11% -lb. table for lowest wow and
flutter. The main table is made of cast iron
to provide shielding against bum pickup.
A cover table made of aluminum, plus an attractive rubber mat, mitigates the attraction
of magnetic pickups. Precision -machined, the
Thorens Roto -Drive is adjustable ± 3.0 per
cent for exact musical pitch. A built -in illuminated strobe allows setting to exact speed
while record is playing. Easy levelling Is
accomplished by means of a built -in level bubble and easily accessible levelling screws.
The precision 4 -pole motor is equipped with
a compliant belt-plus -idler arrangement which
provides excellent motor -vibration isolation.
Specifications: Speeds -16, 33, 45, 78 rpm ;
belt and idler wheel drive ; induction 4-pole
motor ; turntable diameter, 12 "; turntable
weight, 11% lbs ; shaft diameter, 9/16" turntable material, cast iron, aluminum cover;
mat, rubber ; wow and flutter below NAB
specs; dimensions of chassis, 15 x 1234"
clearance required above mounting board,
2%" ; below, 3" ; type of mounting. rubber
grommets ; controls, 3 ; provision for arm
mounting, replaceable board ; over -all weight,
22 lbs. Price, $110.00. Accessories, Wood bases
$10.00 to $40.00. Elpa Marketing Industries,
Thorens Bldg., New Hyde Park, N. Y.
1. TD-121
$85.00
2. TD -111
60.00
3.
TDK -101, kit
47.50
-
stylus can be replaced in less than 10 seconds
and comes out with a flick of your finger
no tools or special skill are required.
Specifications: Type moving magnet ; freq.
resp. 10 to 20,000 cps ± 2 db ; output, 1.25
my /cm rec. velocity ; channel separation, 33
-
db at 1 kc, 29 db at 10 kc ; recommended load,
47k ohms ; recommended tracking force
professional arms, .75 -1.5 gins, effective stylus mass, 0.5 mg ; compliance -lateral, 20 x
10-e cm /dyne, vertical, 20 x 10- cm /dyne ; no.
of terminals, 4; mounting dimensions, std ;
weight, 6.8 gms, stylus radius, 0.6 mil. Price,
$49.50. Audio Dynamics, Inc., Pickett District
Road, New Milford, Conn.
1. ADC -2, for changers
$37.50
DUAL
DMS-900 Magnetic Stereo Cartridge. Fea-
turing excellent performance with tracking
force of less than 2 grams, the Dual DMS -900
is constructed so that stylus can be easily replaced-just lift out the easily grasped as-
ceramic elements in connection with a special
printed circuit which is an integral part of
the cartridge, the 31D is designed to be fed
into the usual magnetic pickup inputs of
stereo preamps. The cartridge is also available
for ceramic inputs.
Specifications: Type ceramic ; freq. resp. 20
to 20,000 cps ± 2 db ; output, 1.2 mv/cm rec.
velocity ; channel separation, 28 db at 1 kc ;
recommended load, 22 -47 k ohms ; recommended tracking force -professional arms,
2 -4 gms, changers, 6 gms ; compliance -lateral, 3/5 x 10-0 cm /dyne, vertical, 3/5 x 10cm /dyne ; mounting std ; no. of terminals, 4 ;
mounting weight 9 gms. Price, diamond $37.50
with 0.7 mil stylus. Electro-Voice, Inc., Buchanan, Michigan.
1.
2.
32D, ceramic, 0.7 mil diamond stylus $40.00
34D, ceramic, 0.5 mil diamond stylus 40.00
EMPIRE
sembly.
Specifications: Type variable reluctance;
freq. resp. 20 to 20,000 cps ± 3 db ; output, 1
mv/cm rec. velocity ; channel separation, 28
db at 1 kc ; recommended load, I2 -47 k
ohms ; recommended tracking force-professional arms, 1.5 -5 gms, changers 2 -5 gms ;
compliance -lateral 4 x 10-s cm /dyne, vertical,
3 x 10-e cm /dyne ; inductance, 250 mh, d.c.
resistance 800 ohms /channel ; no. of terminals,
4; mounting dimensions, std ; weight 14 gms ;
Price, diamond $34.50 ; replacement styli
$17.25. United Audio Products, 12 W. 18th
Street, New York 11, N. Y.
WEATHERS
Synchromatio "66" Turntable. A high -performance turntable of unusual design, for
rumble -free constant-speed reproduction of
stereo and mono LP records. Synchronous
drive motors, direct drive, and smooth, low friction platter bearings hold wow, flutter, and
rumble well below audibility. Entire lightweight system is shock-mounted on 3 -cycle
suspension system to prevent acoustic feedback or groove skipping due to floorborne
vibrations. Seismic platform accommodates
any lightweight tone arm of average length.
ELECTRO -VOICE
31D Ceramic Stereo Cartridge. Employing
DYNACO
Stereodyne II. Features a symmetrical moving -iron (variable reluctance) design utilizing
a quadri-coli push -pull system for exceptional
distortion cancellation. Hum pickup is almost
non -existent with complete mu -metal shielding, plus the hum -bucking push -pull design.
8801' Mono-Stereo Cartridge. Intended for
use in the highest quality tone arms, the
880P features an extended frequency range
and unusual smoothness of response.
Specifications: Type moving magnet ; freq.
resp. 6 to 30,000 cps + 1% db ; output, 8.0 my ;
channel separation, 35 db at 1 kc, 30 db at 10
kc ; recommended load, 47k ohms ; recommended tracking force -professional arms 0.5
gms, changers 3 gms, effective stylus mass
0.3 mg ; compliance -lateral 30 x 10+ cm /dyne,
vertical 30 x 10- cm /dyne inductance 500
mh ; d.c. resistance 850 ohms ; no. of terminals, 4 ; mounting dimensions, 7/16 or
j5" ; weight 12 gms. Additional features : 0.6mil hand polished diamond stylus. Price, diamond $47.50, replacement styli $22.50.
Empire Scientific 1025 Stewart Ave., Garden
City, N. Y.
1. Empire 108, mono stereo cartridge
7 -mil diamond
$ 35.00
2. Replacement stylus
for Empire 108
17.50
ESL
"Redhead" Stereo Ceramic Cartridge. The
newest of the well -known ESL phonograph
cartridges, the Redhead was developed to
bring the trouble-free reproduction of an ESL
cartridge within the reach of every critical
listener. It features low distortion, wide frequency range, and excellent transient response.
Specifications: Speeds -33'% rpm ; direct
rim drive ; (2) hysteresis -synchronous motors ; turntable diameter, 12" ; turntable material, mat, rubber ; wow, 0.02% ; flutter
0.04% ; dimensions of chassie, 16 "w x 14 "d x
t "h; type of mounting, 5 neoprene mounts;
controls, on -off. Price, $66.00 with base as
shown. Weathers Div. of TelePrompter Corp.,
50 W. 44th St., New York 36, N. Y.
1. ML -1 -LB, 33 1/3 rpm turntable
$49.95
2. ML- 234 -LB, 33 1/3 and 45 rpm
turntable
64.50
PHONO
CARTRIDGES
ADC
ADC-1. Designed for use with tone arms
and turntables of the highest quality, the
ADC -1 is individually calibrated and comes
with complete performance report card. The
Specifications: Type, moving iron ; freq.
resp. 30 to 15,000 cps ± 2 db ; output, 1.4 mv/
cm rec. velocity ; channel separation, 26 db at
1 kc, 15 db at 10 kc ; recommended load 47 k
ohms ; recommended tracking force-professional arms, 1 -2% gms, changers 2 -3 gms ;
effective stylus mass, 0.8 mg ; compliance
lateral 5 x 10-6 cm /dyne, vertical 5 x 10- cm/
dyne ; inductance, 200 mh ; d.c. resistance
1250 ohms ; no. of terminals 4 ; mounting
dimensions std. weight 10 gms. Additional
features: 0.5 -mil and 3.0 -mil styli available.
Price diamond $29.95, replacement styli
$14.95. Dynaco, Inc., 3912 Powelton Ave.,
Philadelphia, Pa.
-
ELAC
Stereotwin STS -220. The Model STS -220 is
a moving-magnet cartridge with 0.7 -mil diamond stylus designed for mono as well as
stereo records. Frequency range is from 20 to
20,000 cycles with effective inter -channel sepa-
ration over the entire band. Supplied with
extra, replacement diamond stylus.
Specifications: Type moving magnet ; freq.
resp. 20 to 20,000 cps + 2 db ; output, 2.0
my /cm rec. velocity ; channel separation, 24
db at 1 kc, 24 db at 10 kc recommended load,
33k -51k ohms ; recommended tracking force
professional arms, 3 gms, changers, 3 -5 gms,
effective stylus mass, 2.2 mg ; compliance
lateral, 5.1 x 10-' cm /dyne, vertical 5.1 x 10-'
cm /dyne ; d.c. resistance, 1000 ohms ; no. of
terminals, 4 ; mounting dimensions, standard ;
Price, diamond $34.50 ; replacement diamond
styli $12.50. Benjamin Electronic Sound Corp.,
97 -03 43 Ave., Corona 68, N. Y.
-
1.
Stereotwin STS -310, with 0.5 mil
stylus
48
$45.00
Specifications: Type, ceramic ; freq. resp. 20
to 20,000 cps ± 2 db ; output, 50 mv/cm rec.
velocity ; channel separation, 20 db at 1 kc ;
recommended load, 2.2 megohms or more ;
recommended tracking force
gms min.;
effective stylus mass, 2.5 mg ; compliance
lateral, 3 x 10-6 cm /dyne, vertical, 3 x 10-e cm/
dyne ; capacitance, 450 pf ; no. of terminals,
4 ; mounting dimensions, %/s" ; weight, 5 gms.
Additional features : two plug -in networks
provided which convert to electrical equivalent of magnetic cartridge. Price, diamond,
$14.95 ; replacement styli. $10.00. Electra
Sonic Laboratories, Inc., 627 Broadway, New
York 12, N. Y.
-3
FAIRCHILD
SM -2 Stereo Cartridge. Designed for professional applications, the SM -2 can be used
in home high fidelity arms. The stylus utilizes
a 0.7 -mil polished diamond.
Specifications: Type moving magnet ; freq.
resp. 20 to 15 k cps ± t db ; output 5 my ;
channel separation 20 db at 1 kc, 20 db at
10 kc ; recommended load, 47,000 ohms ; recommended tracking force -professional arms
2.5 gins, changers 3 -4 gms, effective stylus
mass 1 mg; compliance- lateral 5 x 10-
cm/dyne, vertical 4.5 x 10-6 cm /dyne ; inductance, 500 mh, d.c. resistance 2000 ohms;
capacitance 120 pf ; no. of terminals 4;
mounting dimensions j5" ; weight 11 gms.
Additional features : linear separation, low
hum, low distortion (Barkhausen effect eliminated), replaceable stylus assembly. Price,
diamond, $37.50 ; replacement styli $15.00.
Fairchild Recording Equipment. Corp. 10-40
45th Ave., L. I. C., N. Y.
1. SM -1, stereo cartridge
2. 225A, 2258 11.0&2.5)
tridges
AUDIO
AmericanRadioHistory.Com
-
$
mono car-
34.95
37.50
AUGUST, 1962
all- transistorized
New Sony Sterecorder 777
the
first/ complete /portable /all -transistorized /high fidelity
PROFESSIONAL RECORDING & PLAYBACK SYSTEM
The most advanced achievement in re:ordyr eng neerirg to date, the superb nit+
remote-controlled professional Sterecorder 777 series futures the exclusive and patented
Sony Electro Bi- Lateral 2 & 4 track playback Head a revolutionary innovation tt at
permits the playback of 2 track and 4 track stereophonic or monophonic tape without
track width compromise through the saute head
Included in an array of outstanding features are individ sal erase /record /playba:k
heads, professional 3" VU meters, automatic shut -ctf, automatic tape lifters, an ailsolenoid, feather -touch eperated mechanism, electrical speed change, monitoring Df
either source or tape, sound on sound facilities, and an all-transistorized military plug -in
type circuitry for simply maintenance. The :hree motors consist of one hysteresis
synchronous drive motor and two hi-torqu, spooling motor:.
Unquestionably the finest professional value on the market today, the 777 is ava.Iable in two models, the S -2 (records 2 track stereo) ani the S-4 (records 4 track stereo).
Both models can reproduce 2 and 4 track tapes* And the Sterecorder 777 models wit
integrate into any existir component system. $595 complc to with portable case ar d
remote control unit.
-
*Through the exclusive
Sc ny
All Sony Sterecorders
are Multiplex ready!
!
Electro Bi-Lateral
and 4 track payback head.
SUPERSCOPE
The Tapeway to Stereo
AmericanRadioHistory.Com
Sony has also developed a complete port-
able all -transistorized 20 watt speaker/
amplifier combination, featuring separate
volume, treble and bass controls, mounted in
a carrying case that matches the Sterecorder
777. $175 each.
Also available is the MX-777,a six channel
all- transistorized stereo /monophonic mixer
that contains six matching transformers for
balanced microphone inputs and recorder
outputs, individual level controls and channel
selector switches, Cannon XL type receptacles,
a switch to permit bridging of center staging
solo mike. $175 complete with matching carrying case.
The first/ complete /portable /all -transistorized/high fidelity /professional recording &
playback system: $1120 complete.
Sold only at Superscope franchised dealers.
The better stores everywhere.
For additional literature and name of
nearest franchised dealer write Superscope,
Sun Valley, California.
Inc., Dept 7
3. 230, Micro -7, 0.7 -mil mono
4. 216A, vertical cartridge
cartridge
42.50
85.00
GENERAL ELECTRIC
VR- 1000 -5 Stereo Cartridge. This latest
entry by GE into the magnetic cartridge field
reflects their many years of experience in
making cartridges for high fidelity applications. A feature, besides its performance, is
the easy replacement of the stylus.
Specifications: Type magnetic ; freq. resp.
20 to 20,000 cps ± 3 db ; output, 1 mv/cm
rec. velocity ; channel separation, 25 db at 1 kc.
15 db at 10 kc; recommended load, 47k ohms;
recommended tracking force -professional
arms, 1 -3 gms, changers, 3 gms ; effective sty-
lus mass 1.2 mg ; compliance -lateral,
6 x 10-4
cm /dyne, vertical, 9 x 10-4 cm /dyne ; inductance 400 mh; d.c. resistance 1100 ohms; no.
of terminals 4; mounting dimensions, % inch ;
weight Il gms. Price diamond, $29.95; re-
placement stylus :14.95. General Electric Co.,
Audio Products Dept., 2200 N. 22nd St., De-
NEAT
VS- 1000D, Moving -Coil Cartridge. A high
quality moving -coil cartridge featuring easily
replaceable stylus assembly for this kind of
cartridge. The output is relatively high for a
moving coil and, as expected, the frequency
range is relatively wide. And smooth too.
Available from various sources in the United
States -write the manufacturer.
Specifications: Type moving coil ; freq. resp.
10 to 20,000 cps ± S db ; output, 5 my ; channel separation, SO db at 1 kc, 20 db at 10 kc ;
recommended load. 100-100k ohms ; recommended tracking force-professional arms, 2
gms : compliance- lateral, 10 x 10a cm /dyne,
vertical, 10 x10-4 cm /dyne ; d.c. resistance,
SO ohms ; no. of terminals, 4; mounting di-
mensions, 12.7 mm
; weight. 13.5 gms. Additional features : interchangeable stylus, high
output voltage. Neat Onkyo Denki Co., Ltd.,
No. 4, 1- chrome. Kanda Hatago -cho, Chiyodaku, Tokyo, Japan.
catur, Ill.
1. VR 22 -5, ster cartridge
2. VR 22 -7, ster cartridge
3. VR 1000-7, ster cartridge
4. VR 2, mono cartridge
24.95
GRADO
`Classic" Stereo Cartridge. The Classic cartridge uses the same basic design as the superior Laboratory Series cartridge, and is
manufactured on a small assembly line basis
with extremely close tolerances. The bass
response in the Laboratory and Classic Series
is identical, imparting a sweeping effortless
quality to the over -all sound. The midrange
is very close. and the high frequency response
differs but slightly.
DST-62 Stereo Cartridge. This is the latest
model and development of the already well known DST unit. Improvements include elimination of rubber membrane complete enclosure
of cartridge bottom. Torsion bar re- enforced
making mis- alignment impossible even with
long time lapse.
Specifications: Type dynamic; freq. resp.
30 to 15 k cps ±.2 db; output, .1 my /em rec.
velocity ; channel separation. 25 db at 1 kc, 25
db at 10 kc ; recommended load, 50 (min)
ohms ; recommended tracking force- professional arms, 6 gins, effective stylus mass, 1
mg; compliance-lateral, 3.6 x 10-1 cm /dyne,
vertical, 3.6 x10-4 cm /dyne ; d.c. resistance,
18 ohms ; no. of terminals, 5 ; mounting dimensions, special ; weight, 30 gms. Price, diamond,
$79.50 ; replacement styli, $20.00. Gotham
Audio Corp., 2 West 46th St., New York 36.
N. Y.
ORTOFON
Specification: Type, moving coil ; freq.
reap. 15 to 28,000 cps ± 1 db ; output, 0.9 mv/
cm rec. velocity ; channel separation, 25 db at
1 kc ; recommended load, above 5,000 ohms;
recommended tracking force-professional
arms, 3 gms ; effective stylus mass, 0.5 mg;
compliance, 12 x 10-4 cm /dyne ; d.c. resistance,
1100 ohms ; no. of terminals, 4.
Additional features : no magnetic attraction to steel turntables ; one year uncondi-
tional guarantee, plus four additional years
for stylus against normal wear. Price, diamond, $37.50. Grado Laboratories, Inc., 4614
Seventh Ave., Brooklyn 20, N. Y.
1. "Senator" cartridge
$24.95
2. "Laboratory" cartridge
49.50
KNIGHT
KN -505X Stereo Cartridge. A high-quality
stereo cartridge for the most critical audio
requirements. Highly compliant and with relatively high output, the 505X is suited for the
rigors of stereo.
Specifications: Type, magnetic; freq. resp.
I5 to 30,000 cps ± S db ; output, 7.5 mv ; channel separation, 28 db at 1 kc, 25 db at 10 kc ;
recommended load, 47,000 ohms ; recommended tracking force -professional arms, 1
gm, changers, 4 gms ; effective stylus mass,
0.6 mg; compliance-lateral, 15 x 10-4 cm/
dyne, vertical, 15 x 10- cm /dyne; no. of terminals, 4 ; mounting dimensions, 7/16' or
j" ; weight, 12 gms. Price, diamond, $17.95;
replacement styli, $9.95. Allied Radio Corporation, 100 N. Western Ave., Chicago 80, Ill.
force -professional arms, 2-5 gins ; no. of
terminals, 4 ; mounting dimensions, std ;
weight, 14 gms. Price, diamond, $46.50. Pickering and Co., Plainview, N. Y.
SHURE
MSS Stereo Dynetic Phonograph Cartridge.
Shure's finest cartridge for the very finest
sound systems. Available with either .0005"
stylus or .0007 ". Compliance of .0005" stylus
permits tracking at less than one gram ;
.0007" at from 1.5 to 3 grams. Completely
new, super- rugged stylus assembly is encased in plastic "grip", making stylus changing as easy as plugging in an electric cord.
Special high efficiency Mumetal shielding prevents pick -up of hum.
NEUMANN
$ 18.95
16.95
Specifications: Type moving magnet ; freq.
resp. 20 to 17,000 cps ; output, t mv/ rec.
velocity ; channel separation, 35 db ; tracking
SPU-T Cartridge. The Ortofon stereo cartridge, Model SPU, has extremely high compliance and low inertia of the stylus armature to give undistorted reproduction of stereo
recordings. The meticulous craftsmanship
of this component is immediately recognizable
both in sight and sound. The electromagnetic
elements are wound with an extra pure copper wire into long thin coils. Thus, the inertia
and directional forces are reduced to a minimum and consequently the force required
for tracking at both ends of the audio spectrum is very small. The stylus arm is composed of a special thin and light alloy strip
to ensure compliance in both planes. "Prime
diamonds" are used for the stylus so that
under normal use they will last indefinitely
and most certainly minimize record wear.
Specifications: Type moving coil; freq. resp.
20 to 20,000 cps ± 2 db ; output, 14 mv ; channel separation, 25 db at 1 kc, 20 db at 10 kc;
recommended load, 50 k ohms ; recommended
tracking force -professional arms, 1 -2 gins
effective stylus mass, 1 mg ; compliance
lateral, 10 x 10i cm /dyne, vertical, 10 x 10-4
cm /dyne ; d.c. resistance, 1.8 ohms ; no. of
terminals,4 ; mounting dimensions, standard ;
weight, 17 gms with transformer. Additional
features : minimum of 20 -db channel separation is maintained throughout audible range.
Price, diamond. $49.95 ; replacement styli,
$15.00. Elpa Marketing Industries, New Hyde
Park, N. Y.
1. SPU /GT, Mounted in Ortofon shell
$49.95
2. SPU /ESL, mounted in Ortofon shell for
-
ESL
49.95
arms
PICKERING
Pickering Model U38/AT Stereo Fluxvalve.
It is designed especially for the new generation of automatic turntables. It combines hum
shielding with high output for high signal to-noise ratio. High compliance is retained
for turnable performance while providing
the ruggedness demanded by automatic operation. Improved frequency response and low
inductance make the new Pickering U38 /AT
a truly universal cartridge.
Specifications: Type magnetic ; freq. resp.
mv/cm
; output, 1
rec. velocity ; channel separation, 22.5 db at
1
kc, 10 db at 10 kc ; recommended load
per channel, 47,000 ohms ; effective stylus
mass. 1.3 mg : compliance -lateral, 22 x10-4
cm /dyne (for M33-5) vertical, 22 x 10- cm/
dyne (for 3133 -5) ; inductance, 600 hm; d.c.
resistance, 750 ohms ; capacitance, 70 pf ; no.
of terminals, 4; mounting dimensions, std;
Price, diamond, $36.50 ; replacement styli,
$19.50. Shure Bros., 222 Hartrey Ave., Evanston, Ill.
$27.50
1. M -77 (4 -6 gms tracking)
20 to 20,000 cps ± 2% db
2.
3.
4.
5.
M -3D
M -7D
(3 -6 gms tracking)
(4 -7 gms tracking)
M3N21D (21/2
M7N21D (21/2
SONOTONE
97'A Series
Cartridge and Velocitone "Mark
II." With Velocitone, the ceramic cartridge
output can be plugged directly into the
magnetic phono inputs of your amplifier.
The 9TA is a high -quality stereo cartridge
which utilizes a ceramic element and is thus
hum free.
Specifications: Type ceramic; freq. resp.
20 to 17,000 cps ± 2 db ; output, 11 mv
(equalized) ; channel separation, 25 db at 1
kc ; recommended load, 2 megohms ; recommended tracking force -professional arms,
24 gins, changers, 3 -5 gms ; compliance
lateral, 5.5 x 10-e cm /dyne, no. of terminals,
4; mounting dimensions, %" and %" ; weight,
3.2 gms. Price, diamond, $13.00; sapphire,
$8.35 ; replacement styli, $2.75 ; $5.75. Sonotone Corp., Elmsford, N. Y.
1. Velocitone "Mark II" with
-
equalizers
2.
AmericanRadioHistory.Com
$14.75 -22.75
6.00- 9.75
i6TA -18TA series
8.75 -13.00
6.00- 9.75
8TA series
4. 916TA series
3.
SONOVOX
Moving Magnet Stereo Cartridge. The Sono vox SX -1 represents a refinement in moving
magnet cartridges. The magnet is spherical
in shape thus achieving a uniform field. Extremely low mass and high compliance of the
vibrating system produce minimum record
wear.
Specifications: Type moving magnet ; freq.
resp. 20 to 20,000 cps ± 1 db ; output, 4 my ;
channel separation, 20 db at 1 kc, 20 db at 10
kc ; recommended load, 50k ohms ; recommended tracking force -professional arms, 3
gms ; compliance -vertical, 3 x 10-4 cm /dyne ;
AUDIO
50
45.00
24.00
gms maximum tracking) 47.25
gms maximum tracking) 36.75
AUGUST, 1962
-e
INTRODUCING A
NEW SERIES OF
COMPONENTS BY
PILOT
The only thing more impressive than the sound
is the price.
L
.
E EO
,
t.
high -fidelity component.
Model 230 Stereo Amplifier
-A 24 -watt integrated stereophonic amplifier designed
for maximum control flexi-
unique signal
bility. Frequency response
Model 280B FM Stereo Tuner
who demand performance and value from a
-For those
With
PILOT'S
sampling Multiplex circuit:
separation, 30 db or better.
With enclosure
99.50
( ±1
db): 10-30,000 cps; harmonic distortion: 1 %. Complete with enclosure 89.50
also offers two
other series of compoPILOT
nents, as well as a variety of 3 -way speaker
systems. See and hear
them all at your PILOT
dealer. For literature,
write address below.
,.
a
AUGUST, 1962
....
Model 610 Stereo Receiver -A
complete stereo preamplifier,
24 -watt stereo amplifier and FM
Multiplex stereo tuner... all on
one compact chassis. Equipped
with an Automatic FM Stereo
Indicator. In brush gold and black.
199.50
With enclosure
PILOT RADIO CORPORATION 37 -38 36TH STREET, LONG ISLAND CITY
AUDIO
I 1
1.
N. Y.
51
AmericanRadioHistory.Com
d.c. resistance, 150 ohms
weight, 12.5 gms.
;
no. of terminals,
4
Additional features: stylus, 0.7 mil diamond. Price, diamond, $30.00. Sonovox Co.,
Ltd., 101 Tokiwamatsu -cho, Shibaya -ku, Tokyo,
Japan.
STANTON
Model 481AA Stanton Stereo Fluxvalve. An
ultra -linear professional pickup for use with
ultra -lightweight tone arms capable of tracking within the range from 1/I to 3 grams.
Supplied with the D4005AA V -GUARD diamond stylus assembly.
overhang %; maximum tracking error, 8 deg;
additional features, dynamic balance, plug -in
cartridge, adjustable arm rest ; arm resonance
-15 cps lateral 15 cps vertical ; over -all
weight 1 lb mounting dimensions, 8%" radius
from spindle. Price $49.95. Dynaco Inc., 3912
Powelton Ave., Philadelphia, Pa.
1.
TA -16, 16" version of above
$
59.95
EMI
Model EPU 100. Integrated Tone Arm and
Stereo Cartridge. This new pickup was introduced to meet the demands of audio engineers
and hi -fi enthusiasts for a precision instrument designed as a single unit. With the
cartridge and arm designed in the same
laboratories and made in the same factory, all
the requirements for perfect reproduction
Specifications: Type moving magnet ; freq.
resp. 20 to t0k cps ± t db ; output. 0.5 my /cm
rec. velocity; channel separation, 35 db recommended tracking force-professional arms,
3 gms; no. of terminals, 4 ; mounting dimensions, std ; weight, 11 gms. Price, diamond,
$49.50; replacement styli, $19.50 Pickering
and Co., Prof. Prod. Div., Plainview, N. Y.
can be met.
Specifications: Over-all length of arm,
10'/3" ; type of suspension, pivot ; stylus
force 2.5 gms ; type of pickup head, integral;
material aluminum; arm material aluminum
and steel ; spacing, std ; additional features,
designed to give minimum distortion toward
center of record ; Price, $99.75. Scope Electronics Corp., 10 Columbus Circle, New York.
N. Y.
EMPIRE
Model 980 Playback Arm. Available in Satin
chrome (980) or Satin gold (980G) finish, the
new Empire 980 arm combines free suspension
TONEARMS
ADC
N. Y.
1. 500A anti -skating arm with removable
head
16" anti -skating arm with removable head
3. SA -12, 12" stereo arm with cartridge
slide
4. SA -16, 16" stereo arm with two cartridge slides
$ 29.95
2. 501,
37.50
39.95
60.00
GRADO
Laboratory Tone Arm. The Grado tone arm
incorporates features never before found outside of the laboratory. It has separate balance
adjustments for the vertical and lateral planes
of arm movement, so the user can adjust the
arm for perfect vertical balance and then adjust the arm for perfect lateral balance,
regardless of weight and mass variations. The
result of balance is a sharply reduced susceptibility to mechanical shock and acoustic feedback.
;
Pritchard Pickup System, ADC -85, A dynamically balanced tone arm with the heavy
adjustable counterweight occupying a minimal
amount of space behind the mounting. To adjust stylus tracking force, you simply move
the counterweight until the arm is in perfect
balance. A fine adjustment allows the system
to track at the precise force required by the
cartridge design. With the ADC -1, the Pritchard system tracks at % gram.
Because of its low inertia, the system tracks
each side of the groove perfectly, even if the
record is warped. To stabilize the force created between the disc and the arm, a side
thrust compensator permita the stylus to
maintain even force on both sides of the
groove wall. A signal ball-bearing mount
minimizes friction.
Specifications: Over -all length of arm,
10%" ; distance from arm axis to turntable
spindle, 9"; type of suspension, gimbal ;
stylus force, a/ up gms ; type of pickup head,
plug -in ; material, plastic ; arm material,
walnut ; pickup mounting, screw ; screws,
various; spacing, std; overhang, 0.7" ; additional features, skating-force compensation ;
arm resonance
cps, lateral ; 6 cps, vertical ;
Price, $85.00. Accessories : extra pickup
heads, $6.95. Audio Dynamics Corp., Pickett
District Road, New Milford, Conn.
-6
DYNACO
Integrated Arm and Cartridge.
Integrated arm and cartridge with the same
cartridge as the Stereodyne II in a plug-in
arrangement. Single -hole mounting, dynamically balanced system utilizing "Isodyne"
principle of dynamic equilibrium which maintains equal pressure on each groove wall at
any stylus force.
Specifications: Over -all length of arm, 12"
distance from arm axis to turntable spindle,
8 %" height range of turntable, '/4" to 2" type
of suspension, gimbal; stylus force range, 1 to
4 gms ; type of pickup head, integrated with
SDII cartridge ; arm material, aluminum,
TA -12 12"
pickup mounting plug -in ; offset angle
and dynamic balance, the latter being achieved
by locating the pivot points at the center
of the arm's mass. The exclusive new "DynaLift" lifts the arm away from the record
automatically at the end of play.
Specifications: Over -all length of arm 12 %"
distance from arm axis to turntable spindle
9" ; height range of turntable, 1 %" ; type of
suspension, ball bearing ; stylus force range,
0 to 8 gms ; arm material aluminum ; pickup
mounting interchangeable cartridge mount
screw spacing 7/16 or %" ; offset angle, 23.8
deg ; overhang %" range of cartridge weights
for zero adjustment. 2 to 25 gms ; maximum
tracking error, ± 0.65 deg ; additional features.
plug -in cable assembly, calibrated force adjustment ; arm resonance 6 cps lateral, 6 cps
vertical. Price $50.00. Accessories : cartridge
mounting brackets, $1.95. Empire Scientific,
1075 Stewart Ave., Garden City, N. Y.
problems encountered in reproducing the
stereo groove with its two different walls of
information. It overcomes this problem by
means of the anti -skating device incorporated
in the arm.
Specifications: Over -all length of arm, 11 %" ;
distance from arm axis to turntable spindle,
8',f;" height range of turntable, %" to 2.0" ;
type of suspension, sharp pivots ; stylus force
range. 0 to 10 gins; arm material, aluminum ; pickup mounting screw -in, leads supplied; screws 3/48, spacing %" ; offset angle
21.5 deg ; overhang %" ; range of cartridge
weights for zero adjustment, 5 to 12 gms;
maximum tracking error, - 1% deg ; additional
features, anti -skating device, isolated counterweight, dynamically balanced for 3 gram force,
plug -in cables included ; arm resonance 15
cps lateral, 14 cps vertical ; over -all weight,
0.5 lbs ; mounting, T,(, "dia hole and 3 wood
screws. Price, $58.00. Fairchild Recording
Equipment Corp., 10-40 45th Ave., L. I. C.,
21 deg.
;
1.
Empire 980L, Dyna -Lift for 98 arm
..$
10.00
ESL
52000 Gyro /Balance Arm. Every practical
adjustment in the state of the phonograph art
has been efficiently incorporated in the S2000
Gyro /Balance arm. The arm has a clearly calibrated vertical stylus -force adjustment using
dual balanced hair springs, lineal and temperature compensated, a continuously variable
indexed base overhang adjustment for all
cartridges, and internal stability adjustments
in all three planes. Eliminates the need for
turntable leveling.
Specifications: Over-all length of arm, 13" ;
distance from arm axis to turntable spindle,
8" ; height range of turntable, 1/4" to 2W' ;
type of suspension, spring balance; stylus
force range, 0.5 to 7 gms ; type of pickup
head, plug -in ; material, aluminum ; pickup
mounting, 4 screws ; spacing, W' ; overhang,
39/64" ; eccentric mounting permits compensation for different pickups. Price, $34.95.
Electro-Sonic Laboratories, Inc., 827 Broadway, New York 12, N. Y.
FAIRCHILD
Model 500 Anti- Skating Arm Transport.
The Model 500 Arm -Transport includes the
Fairchild SM -2 stereo cartridge in combination with an arm. The Fairchild 500 is designed specifically to overcome the special
Specifications: Over -all length of arm, 11/4" ;
distance from arm axis to turntable spindle,
8 3/16" ; type of suspension, balance, with
spring; stylus force, '4 gm min. ; type of
pickup head, slide mounts ; arm material,
walnut ; pickup mounting, standard on slide;
overhang, %" ; maximum tracking error, ± 0.5
deg ; additional features, stylus overhang adjustable, interchangeable cartridge slides;
arm resonance-11 cps. Price, $39.50. Accessories : extra cartridge slides, $2.95. Grado
Laboratories, Inc., 4814 Seventh Ave., Brooklyn 20, N. Y.
1. Same, w Laboratory cartridge
2.
3.
Same, w Classic cartridge
Same, w Senator cartridge
GRAY
5.4K -12G Tone Arm Kit. The SAK -12G is a
12" tone arm with the well -known Gray viscous damping principle and offered as a kit.
Another feature of the arm is the interchangeable cartridge slide assembly.
Specifications: Over -all length of arm, 13";
distance from arm axes to turntable spindle,
8 5/16" ; height range of turntable, l'4" to
3" ; type of suspension, sealed viscous damped;
stylus force range, 0 to 10 grams ; type of
pick up head, modular -plug in frame ; arm
aluminum ;
pickup
mounting
material,
screws ; screws, 3 -48 spacing, '/s" overhang 0.682 "; range of cartridge weights for
zero adjustment, 0 to 12 grams ; maximum
tracking error 2 degrees ; additional features,
;
dynamically balanced ; arm resonance, 10
cps lateral, 20 cps vertical ; over -all weight
AUDIO
52
AmericanRadioHistory.Com
$55.00
75.00
63.00
AUGUST, 1962
a
HEAR TODAY! NEW KODAK TAPE!
SOUND RECORDING -,AFE
O
r
What's new about new KODAK Sound Recording Tape? Plenty. The oxide
coating on this new tape is more uniform. Plus or minus 14 millionths of an
inch. Magnetic domains are tighter, finer. This means an almost complete
freedom from dropout. It also means superior frequency response in
the high range.
But most important, new KODAK Sound Recording Tape will provide a
uniformity Loth in response and sensitivity that makes it the most dependable
recording material yet developed. Other benefits? Superb signal -to -noise
ratio. Head -clinging suppleness. Lubrication that prevents both head and
tape wear. And convenience, too. It comes on a KODAK Thread -Easy
seven-inch reel with unique built -in splicer. Uniformity, frequency
response, low distortion and high sensitivity. Doesn't it make
sense 0, swileh to new Kt )n \N Swim! Recording Tape today?
TRADEMARK
EASTMAN KODAK COMPANY, ROCHESTER 4, N.
AUDIO
Y.
53
AUGUST, 1962
AmericanRadioHistory.Com
1% lbs ; mounting dimensions to clear arm,
13%" by 3 ". Price, $24.95 kit, $32.50 assembled ; accessories, extra pickup heads $4.60.
Gray Research and Development Co., Box 12,
Elwood, Conn.
1. SAK -12N, (kit) same as above except
finished in aluminum
$ 28.60
2. 212 -TN same as SAK -12N assembled
35.50
3. 208 -S, 16" prof stereo tone arm
49.50
lowered thru hydraulic damping lever; arm
resonance-15 cps ; lateral ; 15 cps ; vertical;
over-all weight, 1% lbs. Price, $89.50. Shure
Bros., 222 Hartrey Ave., Evanston, Ill.
1. M232A, professional 12" tone arm
$29.95
2. 236, professional 16" tone arm
31.95
3. 212 "Stereo Dynetic" 12" integ arm
4.
and cartridge
212, "Stereo Dynetic" 16" integ arm
and cartridge
NEAT
GA -15P 16" Professional Arm Balanced
Type. Designed to perform professional functions, the GA -15P is a sturdy and well constructed tone arm incorporating the most re-
cent advances. The plug -in head utilizes 5terminal wiring with an independent chassis
ground. Mounting dimensions for cartridges
are standard EIA so that it will accept all
standard cartridges. Arm resonance is unusually low, and is achieved by attention to
detail in manufacturing and careful design.
Specifications: Over -all length of arm,
14%" ; distance from arm axis to turntable
spindle, 10 %" ; height range of turntable, 114"
to 1%" ; type of suspension, miniature ball
bearing ; stylus force range, 0 to 10 gms ; type
of pickup head, plug-in; material, plastic;
arm material, aluminum ; pickup mounting,
screws; screws 2 ; spacing, std ; offset angle,
22 deg ; overhang, %" ; range of cartridge
weights for zero adjustment, 5 to 20 gms ;
maximum tracking error, I deg ; additional
features, stylus -force adjustment 0-10 gm
with scales for direct reading ; arm resonance
3
cps, lateral ; 5 cps, vertical ; over -all
weight, 1.5 lbs ; mounting dimensions, 23 mm.
Neat Onkyo Denki Co., Ltd., No. 4, 1- chome,
Kanda Hatago -cho, Chiyoda -ku, Tokyo, Japan.
ORTOFON
S -320,
manual tonearm
$34.95
2. ARK converter (makes S -320 tonearm
automatic)
49.95
3. S -260, professional 16" tonearm
36.95
1.
H. H. SCOTT
1000 Integrated Arm 6 Cartridge. Featuring an arm length of 12.5 -in. The arm is adjustable in height from 1 % -in. to 2% -in.
Specifications: Type magnetic; freq. reap.
20 to 20k cps ± E db ; channel separation, 30
db at 1 kc, 20 db at 10 kc ; recommended load.
-
ohms ; recommended tracking force
professional arms, 3.5 gms, effective stylus
mass, 1 mg ; compliance-lateral, 6 x 10-s
cm /dyne, vertical, 3.5 x 104 cm/dyne. Additional features : connecting cables to amplifier moulded to arm; all mounting hardware
and instructions supplied. Price, diamond,
$89.95; replacement styli, $20.00. H. H. Scott
Inc., 111 Powdermill Road, Maynard, Mass.
471:
S.M.E.-SHURE
Model 3009 Pickup Arm (Series II). An
instrument of truly unrivaled quality and
precision, the S.M.E. Tone Arm features an
unprecedented combination of adjustments
and inherent accuracy of manufacture that
absolutely assure the user that he is tracking
Specifications: Over -all length of arm, 12" ;
distance from arm axis to turntable spindle,
9%" ; height range of turntable, 2Sá" to 37,/" ;
type of suspension, gimbal; stylus force
range, 0 to 7 gms ; type of pickup head,
plug -in ; material, plastic ; arm material,
Duralumin ; pickup mounting, adjustable ;
screws, assorted ; spacing, assorted ; offset
angle, 22.7 deg ; overhang, %" ; range of
cartridge weights for zero adjustment, preset
to 31 gms; maximum tracking error, 1.19 deg;
additional features, audio cables plug into
socket in arm ; arm resonance
cps, lateral ;
8 cps, vertical ; over -all weight, 1 lb. Price,
854.95 ; accessories : extra pickup heads, $5.00.
Elpa Marketing Industries, New Hyde Park,
79.50
STANTON
matte operation of the arm. At the touch of
a button, "Auto- Poise" lifts the arm from the
rest and places it on the record as the turntable starts ; disconnects completely from the
tonearm during play so that the arm Is completely independent ; lifts the arm and returns
it to the rest after the record is finished; and
shuts off the turntable.
Specifications: Over -all length of arm,
22% "; distance from arm axis to turntable
spindle, 81/.r "; height range of turntable, 1 %"
to 2 %" ; type of suspension, pivot bearings ;
stylus force range, 0 to 6 gms ; type of pickup
head, universal; material, aluminum ; arm
material, aluminum ; pickup mounting, screws;
screws, ß ; spacing, %" ; offset angle, 21 deg ;
overhang, 31/64 "; range of cartridge weights
for zero adjustment, 0 to 14 gms ; maximum
tracking error, 1 deg ; arm resonance -IS cps,
lateral ; 13 cps, vertical ; over -all weight, 3
lbs ; mounting dimensions, 3%" above, 414"
below. Price, $74.95 ; accessories : extra pickup
heads, $5.95. Rek -O -Kut Co., Inc., 38 -19 108th
St., Corona 68, N. Y.
RMG-212 Tone Arm. Precision ball bearings
are used for both horizontal and vertical
planes assuring perfect tracking at even minimum stylus force. Lateral balance by the
special shape of the Duralumin tube arm enables perfect record tracking even up to 30
out of level. Resonance of the arm is minimized to a sub -audible 8 cps and the
counterweight is calibrated in grams from
0 to 10. The plug -in shell accepts any cartridge and is adjustable for cartridge overhang.
79.50
Model 20o Stanton Unipoise Arm. The ultra lightweight Model 200 leads a trend to featherweight tracking-extending life of both
stylus and record. The Model 200 has the
patented STANTON single pivot hewing for
friction free motion in all plane,,. Ultralightweight construction gives lowest possible
mass. Its design is classically simple, yet
incorporates exclusive features for highest
performance standards and dependability :
simple adjustments balance the arm in all
planes ; a sensitive calibrated stylus -force
adjustment has a range of 0 to 3 grams ;
single -hole installation requires nc tools;
no soldering needed ; plug -in sockets provided ;
built -in arm rest ; entire moving assembly
weighs only 6 ounces ; mounts in minutes,
supplied with template and complete instructions.
Specifications: Over -all length of arm,
11 %" ; distance from arm axis to tlrntable
spindle, 8 11/16" ; type of suspension, single
pivot ; stylus force range, 0 to 3 gms ; pickup
mounting, screw ; screws, ß ; spacir g, std ;
over -all weight, 2 lbs. Price, $36.00. Pickering
and Co., Prof. Prod. Div., Plainview, N. Y.
THORENS
BTD -12S Tone Arm. This tone arm Las been
built to match perfectly the high performance of Thorens precision turntables for which
it is specially adapted. It will equa ly give
outstanding results on any other turntable
presenting a sufficiently low vibration level.
Specifications: Over -all length of arm,
12 %" ; distance from arm axis to turntable
spindle, 7%" ; height range of turntable, ß"
to 3%" ; type of suspension, beatings ; stylus
force range,
0
to
8
gms
;
type of pickup head,
at the correct weight, at all times, with the
least possible tracking error -regardless of
the cartridge used. Among its manifold construction features are : accurate longitudinal
and lateral balance adjustment ; virtually
frictionless knife -edge mounting of tone arm ;
rendering of tone arm non -resonant by use
of internal fibre wood lining ; totally enclosed bearings and an arm control lever
operated through hydraulic damper.
-8
N. Y.
1. RMG -309, 16" arm
2. SMG -212, 12" arm
3. SKG -212, 12" arm
$59.95
29.95
19.95
REK-O-KUT
Automatic Tonearm, Model AP -320. "Auto Poise" can meet the critical requirements of
the new, very high compliance cartridges. It
does this with a mechanism which completely
eliminates the need for manual handling of
the tonearm. "Auto- Poise" features its own
synchronous motor which provides fully auto-
Specifications: Over -all length of arm, 121/4";
distance from arm axis to turntable spindle,
8.43" adjustable ; height range of turntable,
2,Y.," to 31/1" ; type of suspension, knife -edge ;
stylus force range, % to 6 gins ; type of pickup head, removable- locking collar ; material,
plastic ; arm material, stainless steel ; pickup
mounting, standard ; spacing, 14 "; range of
cartridge weights for zero adjustment, 5 to
20 gms ; additional features, Arm raised and
54
plug -in ; material, alum. ; arm material duralumin ; pickup mounting, adjustable ; iicrews,
assorted ; spacing, standard ; offset angle, 25
15" deg ; overhang, 11/16" ; range of ca.tridge
weights for zero adjustment, 5 to 19 gms ;
maximum tracking error, 0.5 deg inch ; additional features, stylus remains in vertical
plane for any height adjustment ; arm resonance-16 cps, lateral ; 16 cps, vertical ; overall weight, 1 lb. Price, $50.00 ; accessories :
extra pickup heads, $5.00. Elpa Marketing Industries, Thorens Bldg., New Hyde Park, N. Y.
AUDIO
AmericanRadioHistory.Com
AUGUST, 1962
JBL PRESENTS..
.
THE TRIML /NE
54 ...
.
NEM PASSEIVE
ilfk FREW \
RAINE-111 ONES
97HUE BASS
FU
_.ESS 'YLA1
OURIO _FEU'
SPAOE!
Decor -conscious listeners want small speaker systems
for their stereo installations. Thay have shown great
enthusiasm for the thin -silhouette enclosure. They also
demand full bass, bass without compromise. Yet, up
to this point, they have not been able to get it from a
reflex, folded horn, or "infinite baffle" system this
small. Now JBL has found the right way to meet the
need. The Trimline 54 is a precision loudspeaker system only 51/4" deep. 23'/x" wide, 20" high. It contains
two radiators, one dynamic, one passive. The dynamic
unit is the 8" Linear- Efficiency model LEST, a loudspeaker that reproduces the complete audio spectrum
with a linearity unprecedented in a transducer of this
size. The new passive 8" low frequency radiator is almost identical to the LEST. It has the same treated
cone, same frame and Lans -a -loy suspension; but it
does not have a voice coil or magnet assembly. The
passive radiator reacts to the dynamic driver at low
frequencies exactly the way air mass and port react in
a full -size reflex system. The passive cone doubles
the effective pistol area for fundamental bass tone
reproduction. By providing optimum loading it also
prevents distortion and increases power handling capacity. The Trimline 54 is solidly built, is given the rich
JBL oiled walnut finish on all four sides. Back is recessed and provided with hangers so the unit may be
suspended tight against a wall. A set of decorator -designed brass legs is optional. Again JBL solves a critical
acoustical problem by coming up with the right idea
at the right time.
PRODUCTS OF JAMES B. LANSING SOUND, INC.. ARE MARKETED BY JBL INTERNATIONAL. LOS ANGELES 38, CALIF.
AUDIO
55
AUGUST, 1962
AmericanRadioHistory.Com
ohms ; frequency response, from 35 to
18,000 cps ; ILA sensitivity 52 db ; magnet
weight, woofer I lb. 6 oz. ceramic, tweeter
3.16 oz. Alnico V ; voice coil diameter, woofer
2%", tweeter 1 in.; recommended enclosure
volume 20 eu ft. Dimensions : 12%" dia. 7"
deep ; mounting dimensions, 4 9/32 in. holes
on 11112" circle ; cutout diameter 10,12" ;
weight 16%" lbs. Price $70.00. Other features: Integral Sonophase vhf Driver, viscous
damped cloth suspension ; Electro- Voice, Inc.,
Buchanan, Michigan.
16
LOUDSPEAKER
MECHANISMS
ALTEC
1.
605A Duplex Loudspeaker. An improved
version of the famous 604 series, the new
605A provides unusually smooth response in
the highs, extremely high linearity, and clean
transient response in the lows.
Specifications: Type, duplex; power handling capacity 35 watts ; impedance 16 ohms;
frequency response, from 20 to 22,000 cps;
magnet weight, 1.f., 40 oz., h.f., 24 oz. ; voice
coil diameter, l.f., 3 ", h.f., 1%" ; free air
resonance frequency 25 cps. Dimensions:
15 5/16" dia. 10" deep ; weight, 37 lbs. with
network. Price $177.00. Altec Lansing Corporation, 1515 S. Manchester Ave., Anaheim,
Calif.
6028 Duplex, 25 -w, 15 -in. spkr
2. 60113 Duplex, 20 -w, 12 -in. spkr
1.
....$143.00
.... 120.00
.. 66.00
3. 8038 bass spkr, 30 -w, 15 -in. spkr
4. 408A "Biflex" 15 -w, 2-in. spkr
....
31.00
BOZAK
Coaxial Speaker. The 13-207A is u
2 -way speaker intended for infinite-ba ®e enclosures and "large" sound. It is capable of
handling modern, high -powered amplifiers.
Specifications: Type 2 -way ; power handling
capacity 20-60 watts : impedance 8 ohms ; frequency response ± 3 db from 40 to 20,000 cps ;
magnet weight 40 oz; voice coil diameter
13-207A
2.
3.
12 TRX, 3 -way speaker
15 TRXB, 3 -way speaker
15 TRX, 3 -way speaker
$130.00
85.00
155.00
GOODMANS
Triaxiom 11'0. 175C 12 -inch 3-Way Loud
speaker. Triaxiom 175C consists of a 3 -way
speaker with three independent concentrically
placed radiators, each designed for maximum performance and efficiency within its
portion of the audio spectrum. The new low resonance free -floating piston cone handles
25 watts of audio power in the bass region
from 20 to 2000 cps. An electrical crossover
provides maximum efficiency from 2000 to
5000 cps. for the mid -range transducer. The
IIypilliptical pressure -driven horn tweeter
handles frequencies from 5000 cps. to 35000
cps. Complete with electrical crossover and
variable acoustical control over a 30" cable.
Specifications: Type 3 -way triaxiai; power
handling capacity 50 watts ; impedance 16
ohms; frequency response, from 20 to 20,000
cps; sensitivity (watts input for + 85-db level
10 feet on axis) % watts ; magnet weight
l' lbs. ; voice coil diameter I% in. ; free air
resonance frequency 32 cps ; recommended enclosure volume 5 cu ft. Dimensions 12" dia.
5" deep; mounting dimensions, % -in. holes
on I1'4" circle; cutout diameter 11" ; weight.
14 lbs. Price $49.50. Rockbar Corp., 650 Halstead Ave., Mamaroneck, N. Y.
1. Triaxiom 8, 8" triaxial
$29.50
2.
HARTLEY
M -108 8 -inch wide -range weatherproof speaker
5.
49.50
Hartley-Luth 220 MS Speaker. This speaker
features the tri- polymer cone and magnetic
suspension under U. S. Patent #3,003,101.
The magnet is 16,000 gauss, frame of cast
aluminum. Outer surround of polysilastic for
freedom of excursion, voice coil wound portion
isolated from the shorted turn and damped
by a dipped coating of polysiloxane. All the
above impervious to conditions of high humidity and moisture. Wide dispersion of high
frequencies plus excellent transient response.
No crossovers or networks.
Specifications: Type full- range; power handling capacity 25 watts ; impedance 8 ohms ;
frequency response, ± 3 db from 20 to 20,000
cps; magnet weight 5% lbs; voice coil diameter 1 in.; free air resonance frequency 42
cps ; recommended enclosure volume 4 cu. ft.
Dimensions 10%" dia. 5%" deep ; mounting
dimensions, (4) 3/16-in. holes on 9%" circle;
cutout diameter 9%"; weight, 7 lbs. Price
$135.00. Other features, resonance fully
damped by shorted turn in coil. Hartley Prod-
ucts Co., Inc., 521 E. 162 St., New York 51,
N.Y.
1. Model 312, 12" full -range spkr
$ 99.95
2. Model 310, 10" full -range spkr
3. Model "XP" 10" full -range spkr
ELECTRO -VOICE
12 TRXB, 1-Way
speaker. Incorporating
design advantages of the Electro -Voice
Radai Coaxial principle, the Electro -Voice
Model 12 TRXB integrated 3 -way loudspeaker
the
includes, also, the latest developments in the
reproduction of the highest audible frequencies through the use of an integral Super
Sonai VHF driver. The 12 TRXB employs the
Model T35B vhf driver. Bass response is excellent, affording pleasing musical balance
without masking effects.
Specifications: Type 3 -way loudspeaker;
power handling capacity 20 watts ; impedance
woofer /pressure tweeters
55.00
JENSEN
Loudspeaker. The Jensen
is a 3 -way system with three electrically
and acoustically independent l.f., m.f. and
hi. channels for utmost balance, efficiency,
smoothness and range extension to upper hearing limit. M.f. and h.f. sections both emplo
compression -driver horn -loaded units for low
distortion and wide-angle dispersion of highs.
Separate dual crossover network. M.f. and h.f
balance controls, fully wired.
G -600
3 -Way
G -600
54.50
Triaxiom 100C, 12" triaxial
34.50
4. Twinaxiom 200C, 12" twin cone
24.50
DL
#2,
-high
frequency
5.
ultra
tweeter
and Skc crossover
12.95
; free air resonance frequency 36 cps;
recommended enclosure volume 5 eu ft minimum. Dimensions 15" diameter 7" deep ;
mounting dimensions, 8 % -in. holes on 141,5"
circle ; cutout diameter 121/4"; weight 13 lbs.
Price $89.50. Other features : Designed for inenite- baffle mounting. R. T. Bozak Mfg. Co.,
P. 0. Box 1166, Darien, Conn.
1. B -199A woofer, 12 -inch
$52.00
2. B -209A midrange speaker, 61/2 inch
51.00
3. B -200Y dual tweeter
32.00
4. B -800 8 -inch wide -range speaker
45.00
ribbon system, ribbon tweeter,
Crossover special woofers
$130.00
2. IMF Standard -Pressure system, 12"
1. IMF
Triaxiom 208C, 8" triaxial, 3" voice
coil
3.
1%"
7/16" deep ; mounting woofer á tweeter 9"
center to center of openings ; weight, 10% lbs.
Price $145.00 woofer & tweeter. Lectronics
of City Line Center, 7644 City Line Ave., Philadelphia, Pa.
5
85.00
75.00
IMF
Specifications: Type 3 -way; power handling
capacity 35 watts ; impedance 16 ohms; frequency response, from 30 cps to upper hearing
limit ; magnet weight 3% lb.
Dimensions: 1.5" din., weight, 33 lbs.
Price, $134.50. Jensen Mfg. Co., 6601 S.
Laramie St., Chicago 38, Ill.
1. G -6108, 15" triaxial
2. H -223F, 12" coaxial
3. H -222, 12" coaxial
4. DX -120, 12" 2- element
5. DXF -80, 8" 2- element
LAFAYETTE
SK -58 12 -inch 2 -Way Speaker. The SK -58
is a 2 -way speaker with a 12 -in. free-edge
woofer plus a 3 -in. cone -type tweeter, with
the tweeter mounted on the same axis as
the woofer. A built -in LC network distributes
the frequencies to the appropriate speaker.
The free edge of the woofer is connected to
the speaker basket by means of sheepskin.
Specifications: Type coaxial; power handling capacity 20 watts ; impedance 8 ohms ;
frequency response, from 30 to 15,000 cps ;
magnet weight 20 oz ; free air resonance
frequency 40 cps; recommended enclosure
volume 6 cu. ft. Dimensions : 12%" dia.,
deep ; cutout diameter /0%"; weight, 11 lbs.
Price $27.00. Other features : brilliance level
control, 3" cone tweeter. Lafayette Radio
Electronics, 111 Jericho Turnpike, Syosset,
6'"
L. I., N. Y.
1. SK -180, 10" 3 -way
2. 5K -210, 12" 3 -way
3. SK -128, 8" biaxial
13IF Styrene Pressure Drivers. Uses polystyrene mass cone, for high accuracy in dy-
namic loudspeakers. Treble handled by phase loaded pressure unit, providing very wide
dispersion and smooth response. In cabinet
of suitable dimensions, will provide smooth,
clear reproduction of orchestral range.
Specifications: Type 2 -way ; power handling capacity 30 watts; impedance 16 ohms;
frequency response, from 25 to 16k cps; free
air resonance frequency woofer 20 cps; recommended enclosure volume 1.5 to 2.5 cu. ft.
Dimensions 12% and 3 3/16 and 21/2" dia.
:
56
$32.50
49.50
19.50
JBL
LE14C, Full -Range 2-Way Coaxial Speaker.
The LE14C is designed to give optimum performance in minimum volume enclosures. The
unique stepped -frame design permits the use
of 14 -inch low- frequency cone. The 4 -inch
diameter voice coil is constructed from edge wound copper ribbon.
Specifications: Type 2 -way coaxial ; power
handling capacity 30 watts; impedance 16
ohms ; voice coil diameter 4 in. ; free air re-
AUDIO
AmericanRadioHistory.Com
$252.75
72.50
62.50
27.50
24.50
AUGUST, 1962
"The ONLY Professional Tape Recorder for Me,"
says GIL STRATTON, well known TV Sportscaster.
"You'll see what mean when you try the
FULLY PROFESSIONAL ROBERTS 192."
I
1
ONLY THE
021
ROBERTSS
l'ROFESSION:1L NIc)nc)phC)nic Tape Recorder
gives you ... Fulltrack or Halftrack * Hi /Lo Impedance input switching * 8/600 Ohm Balanced Output
* Frequency Response: 40 to 15,000 cps at 71/2 fps, ± 2db; 40 to 9500 cps at 33/ ips, + 3db.
* Self Contained Speaker
Signal to Noise Ratio: 50 db below recorded "0" level. * Tape Speeds: 71/2" or 33/4" per second. * Wow and Flutter: Less than
*0.18'%,
track available. * Motor and Drive: PreRMS. * Heads: Inline record /playback head in shielded housing; full track or
cision balanced hysteresis- synchronous motor, to speed stabilized flywheel.'capstan tape drive. * Amplifier: Professional terminal
board wiring used; cast front panel; 6 watts undistorted output. * Equalization: Amplifier record and playback equalization based
on broadcast (NAB) standards. * Inputs and Outputs: Jacks provided for low level, high impedance microphone input; high level
input; auxiliary speaker or line output; input /output jacks for connecting directly to either or both channels. * Index Counter:
Accurate. three digit type. * V. U. Meter: Illuminated, calibrated -10 to 4-3db.* Operating Position: Vertical or horizontal. * Reel
/," overall 28 lbs. * Interlocking Controls:
Size: 7' maximum (up to 2400" of tape). * Dimensions and Weight: 153/4" x 141/2"
Prevent accidental erasure of recorded tapes; instantaneous start and split second acceleration. * Pause Lever: Permits instant
1/2
x 9V
stops during recording, simplifies editing and facilitates setting volume level before recording.* Power Requirements: 95 to 120
volts, 60 cycles, 50 W.
101/2" Reel Adaptor Now Available
- $49.50
$34950
ROBERTS ELECTRONICS, INC., Dept. A -8 -C
5920 Bowcroft Ave., Los Angeles 16, Calif.
Please send me:
ROli
R
ELECTRONICS,
I
N
.
5920 BOWCROFT AVENUE, LOS ANGELES 16, CALIFORNIA
Roberts Stereo Tape Instruction Manual
containing stereo and monaural applications.
I enclose 25ç (cash, stamps) for postage and
handling.
The name of my nearest dealer.
Name
-Address
MFRS. OF ROBERTS SONIC -THESIA. MEDICAL EQUIPMENT, STEREO HEAD PHONES.
NEGATIVE ION GENERATORS, AUDIO EQUIPMENT AND MAGNETIC RECORDING TAPE
AUDIO
City
State
_
57
AUGUST, 1962
AmericanRadioHistory.Com
sonance frequency 25 cps ; recommended enclosure volume 1.7 cu. ft. Dimensions 15" dia.
51/2" deep ; cutout diameter 12 1/16" ; weight,
21 lbs. Price $150.00. James B. Lansing Sound,
Inc., 3249 Casitas Ave., Los Angeles 39, Calif.
1. LEST
$66.00
MONARCH
Model SP -120X1 Co -axial Speaker. A 12 -1n.
coaxial speaker with dual tweeters supported
on a frame in front of the woofer cone and
angled to project highs over a broad angle.
Heavily constructed on a die cast aluminum
frame.
Specifications: Type Coaxial ; power handling capacity 15 watts ; impedance 16 ohms ;
frequency response, 40 to 16,000 cps. Dimensions 12" dia. Price, $24.95. Other features-dual tweeters mounted in front of
woofer at divergent angles. Monarch Electronics International, Inc., North Hollywood,
California.
SP -800X 8 -in. coaxial spkr
$12.95
2. SP -300A 8 -in. foil range spkr
12.50
3. SP -412 12 -in. Tri -plex (3 -way) spkr
46.95
4. SP -200 6t/2 -in. full -range spkr
7.95
1.
resonance suspension at the cone apex gives
very high compliance. The stiffened cone apex
and special voice coil provide a smooth distribution of high frequencies.
Specifications: Type St" ; power handling
capacity 20 watts ; impedance 8 ohms ; frequency response, from 30 to 12,000 cps ; magnet weight 16 oz ; dimensions : 12 7/32" die..
61,2" deep ; weight, 5% lbs. Price $38.50.
Permoflux Corp., 4111 San Fernando Road,
Glendale, California.
1.
Royal Standard 12
2. Royal Deluxe 8
3. Royal Standard 8
4. Royal 8
18,000 cps ; magnet weight 13.47 oz. ; voice
coil diameters
woofer, 1" tweeter ; free air
resonance frequency 60 cps ; recommended enclosure volume 4 cu. ft. Dimensions : 183¢"
dia. 51,x." deep ; mounting dimensions, 4
1/4" holes on std circle; cutout diameter 10% ";
weight, 10 lbs. Price $29.95. Radio Shack, 730
Commonwealth Ave., Boston 17, Mass.
1. Nova 112
$18.95
2. Nova 312
49.95
-2"
$25.00
22.50
17.50
15.00
PIONEER
PAX -20G, 2 -Way Speaker System. The
Pioneer PAX -20G is a 2 -way speaker containing an 8 -in. woofer and a horn -type
tweeter, mounted coaxially.
Specifications: Type coaxial type; power
handling capacity 15 watts ; impedance 8 or 16
ohms; frequency response, ± lo db from 40
to 20,000 cps ; sensitivity (watts input for
NORELCO
STENTORIAN
IIF1012U Extended Range 10-in. Loudspeaker. The "Stentorian" extended range
loudspeaker features a cambric cone with midrange stabilizers and universal impedance
voice coil for 4, 8 or 16 ohms.
Specifications: Type permanent magnet;
power handling capacity 10 watts ; impedance
4, 8, or 16 ohms ; frequency response, ± 8 db
from 30 to 14,000 cps ; magnet weight 38 oz;
voice coil diameter 1 in. ; free air resonance
frequency 35 cps ; recommended enclosure volume 2-8 cu ft. Dimensions 10.187" dia. 4.593"
deep ; mounting dimensions, 4 holes on 10
25/32" circle ; cutout diameter 91" ; weight,
6; lbs. Price $18.95. Barker Sales Co., 339
Broad Ave., Ridgefield, N. J.
1.
Speaker Series. Illustrated is
Model AD5277M, the most powerful in the new T -7
series of twin -cone speakers manufactured by
Philips of The Netherlands, and featuring
Ticonal 7, a highcoercivity alloy which provides the highest possible concentration of
flux densities in the voice -coil air gap. Weight
for weight, Ticonal 7 is said to be about 30
per cent more powerful than any of the conventional magnet materials used in speaker
construction. Voice -coil impedance of the new
T-7 speakers is held constant throughout the
entire frequency range by means of a copper
ring fitted into the air gap. The ring acts as
a shorted turn which induces a current opposite in polarity to that flowing through
the voice coil, which reduces that current,
thereby lowering the impedance to its proper
level. The resonant frequency of the T -7
speakers is very low, resulting in an extremely straight response curve in the bass
region. In addition to the cone for low and
middle notes, the speakers are equipped with
a high -note cone which extends the upper
frequency range. Model AD-5277M is a 12 -in.
speaker with a frequency range of 35 to
18,000 cps and 20 -watt continuous power
handling capacity when properly housed.
Cone resonance is 45 cps. High Fidelity
Products Division, North American Philips
Company, Inc., Hicksville, N. Y. User net
price, $59.50.
1. AD -4277M
12" spkr
2. AD -4877M 8" spkr
3. AD -3877M 8" spkr
$39.00
26.00
9.90
OXFORD
HM18R5 12 -inch Hidden Magnet Speaker.
Not an inverted magnet design, but rather
a new design wherein the magnet and cone
are both included within the basket. This
permits the use of dual cones for extending
the range of the speaker.
Specifications: Type 12" ; power handling
capacity 15 watts; impedance 8 ohms; frequency response, ± 3 db from 40 to 14,000
cps ; sensitivity (watts input for +85 -db
level 10 feet on axis) 2.5 watts ; magnet
weight 12 oz ; voice coil diameter 1.25 in.;
free air resonance frequency 55 cps ; recommended enclosure volume infinite baffle. Dimensions : 12 5/32" dia. 3%" deep ; mounting
dimensions, (4) % -in. holes on 11%" circle;
cutout diameter 11 1/16" ; weight, 5 lbs. Price
$19.95. Other features : flush mounting instructions available for $0.15 or part of JIM
box. Oxford Components, 3911 S. Michigan
Ave., Chicago 53, Ill.
1. HM80H4, 8 -in speaker
$16.50
$14.95
HF812U, 8 -in. speaker
STEPHENS
Model 80CX. Compact
8" coaxial loudspeaker combines qualities of the 80FR and
the new RT -1 tweeter. Special mounting of
tweeter does not increase speaker depth.
Complete with crossover and brilliance control.
Specifications: Type 8" coaxial ; power handling capacity 50 watts peak ; impedance 16
ohms ; freq. reap., ± 5 db from 40 to 25,000
cps; magnet weight 16 oz ; voice coil diameter 2 in.; free air resonance frequency 50
cps; recommended enclosure volume 1.5 cu. ft.
Dimensions, 81/4" dia., 4%" deep ; mounting
dimensions, (4) /4 -in. holes on 7%" circle;
cutout diameter 7" ; weight, 8 lbs. Price
$55.50. Other features electronic crossover.
Stephens Trusonic, Inc., 8538 Warner Drive,
Culver City, Calif.
1
1.
85-db level 10 feet on axis) 0.185 watts;
magnet weight l.f. 9 oz. h.f. 1.35 oz.; voice
coil diameter l.f. 1% in., h.f. % in.; free air
resonance frequency 50 -70 cps ; Dimensions
51/2" deep ; cutout diameter 694" ; weight.
4.4 lbs. Pioneer Electronic Corp., 5 Otowacho
6- chome, Bunkyoku, Tokyo, Japan.
1. PAX -20 A, 8" coaxial speaker
2. PAT -30 X, 12" 3 -way speaker
±
3. PW -25 C, 10 -inch woofer
4. PM -12 A, 5 mid
5. PT -6, horn tweeter
R & A
Coaxial Speaker Series. Manufactured by a
well -known British speaker manufacturer, the
700 series Mark IV models are a group of
high -quality woofer/midrange speakers. Al-
though they vary in fundamental resonance
they all provide smooth frequency response
up to 18,000 cps. All feature Alcomax III
Anisotropie magnet systems with a flux density of 12,000 gauss (10,000 gauss in 5 -in.
unit). The magnet assembly is easily removable without demagnetization and has zero
external field. Power handling capacity is 10,
20, 25, and 30 watts respectively for Model
750 (5 "), Model 780 (8 "), Model 7100 (10 "),
and Model 7120 (12 ") speakers. Voice -coil
impedance is 8 ohms for all models. Distributed in the United States by Ercona Corporation, 16 W. 46th St., New York 36, N. Y. User
net price, Model 750 $9.95, Model 780 $14.95,
Model 7100 $16.95, Model 7120 $18.95.
PERMOFLUX
REALISTIC
"Royal" Speaker Line. The Permoflux
"Royal" speaker line includes 8- and 12 -inch
speakers in deluxe and standard configurations. The speaker cone in this series is flexible, slotted, thin at the edge, and coated
with a permanently soft and resilient formula which together with an extra -large low-
Nova 212 3-way 12" Speaker. A 12" 3 -way
speaker intended for modest-sized enclosures.
It utilizes a whizzer midrange and horn
tweeter with level control.
Specifications: Type permanent magnet;
power handling capacity 20 watts ; impedance
16 ohms ; frequency response, from 35 to
2.
3.
4.
5.
TANNOY
15" 'Monitor' Dual Concentric Loudspeaker.
The new "Monitor" dual concentric incor-
porates many unique features including the
revolutionary patented Tannoy magnetic
shunt. By the use of this device, the magnetic
flux may be accurately distributed between
the low- frequency and high- frequency voice
coil gaps with magnetic losses reduced considerably and useful flux increased by as
much as 20 %. Results are smoother response,
better damping, improved transient response,
higher efficiency.
Specifications: Type dual concentric ; power
handling capacity 50 watts ; impedance 16
ohms ; frequency response, ± 3 db from 30
to 20,000 cps ; magnet weight 6% lbs. ; voice
coil diameter h.f. 2 ", l.f. 2" ; free air reso-
nance frequency 32 cps ; recommended enclosure volume depends on enclosure type.
Dimensions : 1514" die. 9" deep ; mounting dimensions, holes P.C.D. on 143" circle ; cutout diameter WA"; weight, 20 lb., 13 oz.
Price $179.00. Other features Integrated sound
source with high -frequency horn- loaded diaphragm, and curvilinear l.f. diaphragm. Crossover: 1000 cps. Tannoy (America) Ltd., P. O.
Box 177, East Norwich, L. I., N. Y.
1. 12" 'Monitor' dual concentric, same
2.
principle
$138.00
10" 'Monitor' dual concentric (type
111 LZ)
same principle
112.75
UNIVERSITY
Model 812 3 -Way Speaker. Model 312 Series
200 12" high-compliance 3 -way speaker is
capable of response from 28- 40,000 cps.
Award -winning die-cast design, high -compliance woofer. Mid -range provided by patented Diffusicone for uniform dispersion of
the 1000 to 3000 -cps frequencies. The
coaxially mounted Sphericon Super Tweeter
AUDIO
58
AmericanRadioHistory.Com
$33.50
60.00
99.50
60.00
87.00
80FR, 8" full range
120FR, 12" full range
120LX, 12" coaxial
120W, 12" woofer
150FR, 15" full range
AUGUST, 1962
no two are alike
Look at a row of Miracords, and take note of the turntable platters.
They appear as identical as peas in a pod. Yet, no two are alike.
They all started out as heavy, one -piece aluminum alloy castings
bearing only slight resemblance to the finished product. Each was
then secured to a precision lathe, and cut to shape.
Layer after layer of metal was shaved from the form
until the precise design dimensions were obtained.
that gives the Miracord turntable its smooth, unwavering motion.
Remove the turntable of any Miracord, and examine the under -side.
You will see where metal discs were affixed, adding just a little more
weight to one point or another to achieve this perfect balance in motion. Now, look at another Miracord platter. This one
may have more or fewer discs, and at different points.
You can look at a thousand. Each will reveal the individual attention it received. No two will be alike.
At this point, the turntables were as identical in shape,
size, weight, finish and appearance as modern technology can achieve. We could have stopped here, pleased
as punch with the smooth, glistening results of our
efforts. But, the standards of Miracord performance
demand more than apparent quality-greater accuracy than dimensional measurements alone can reveal.
And so, each individual gleaming platter was put to
test for dynamic balance. And each was individually
corrected to assure the balanced distribution of mass
BENJAMIN ELECTRONIC SOUND
CORP.
The Miracord is a modern, high quality record playing
instrument
only one with dynamically balanced
turntable and mass -balanced transcription arm which
you can play manually or as automatically as you
please. The 10H with hysteresis -synchronous motor is
$99.50; model 10 with 4 -pole induction motor, $89.50.
Prices do not include cartridge or base.
-the
M I RACC)RD
97 -03 43RD AVENUE, CORONA 68. NEW YORK
Make it a point to see the Miracord at your high fidelity
dealer soon. For complete details, write to:
SOLE U.S. DISTRIBUTOR FOR ELECTROACUSTICO RECORD PLAYING COMPONENTS
AmericanRadioHistory.Com
has its own reflector baffle to prevent acoustic
interference from woofer and provides 120
deg. dispersion. Built -in electrical crossover
network and adjustable brillance control.
Specifications: Type 3-way; power handling
capacity 35 watts ; impedance 8 -16 ohms ;
frequency response, from 28 to 40,000 cps ;
voice coil diameter 2 in. ; recommended enclosure volume 1.5 eu. ft. min. Dimensions
13" dia. 6%" deep; mounting dimensions,
7/32 -in. holes on 12 %" circle ; cutout diameter 11 % "; weight, 10% lbs. Price $73.00. University Loudspeakers, 80 South Kensico Ave.,
White Plains, N. Y.
:
1.
2.
3.
4.
5.
315 -C, Series 200, 15" 3 -way
$156.00
6201, Series 200, 12" coaxial
57.75
Diffusicone -12, Series 200, 12" 2 -way 39.75
308, Series 200, 8" 3 -way
42.00
Diffusicone -8, Series 200, 8" 2 -way
28.00
UTAH
Uni -Drive Speaker, Model D8LA. An
speaker with good performance at a
moderate price.
Specifications: Type dual-cone; power handling capacity 18 watts ; impedance 8 ohms ;
frequency response, from 40 to 16,000 cps ;
magnet weight 10.0 oz. ; voice coil diameter
1% in. Dimensions 8 3/32" dia. 4" deep ;
mounting dimensions, (8) % " -in. holes on
7 11/16" circle ; cutout diameter 713/16 ";
weight, 4 lbs. Price $24.30. Other features
has dual -diameter magnet. Utah Electronics
Corp., Huntington, Ind.
8 -in
8 -in.
1.
2.
8" 16.0 oz. magnet, 11/2" v.c
D8J, 8" 6.8 oz. magnet, I" v.c.
$32.50
D8SP,
17.50
3.
4.
5.
D121, 12" 6.8 oz. magnet, 1" v.c..... 20.55
D12LA, 12" 10.0 oz. magnet, 11/4" v.c..27.60
D12P, 12" 21.5 oz., magnet, 11/2" v.c. 40.00
WHARFEDALE
Super 12RS /DD Full -range 12" Loudspeaker. A full range 12" speaker with an
unusually powerful magnet system.
Specifications: Type full range ; power handling capacity 40 watts ; impedance 12 -15
ohms ; frequency response, from 25 to 15,000
cps ; magnet weight 256 oz ; voice coil diameter 1% in. ; free air resonance frequency
28 -33 cps; recommended enclosure volume 2
cu. ft. or more. Dimensions /2% dia. 7" deep ;
mounting dimensions, 4 3 /16 -in. holes on
123b" circle ; cutout diameter 107,4" weight,
22 lbs. Price $89.50. Other features 190,000
gauss total flux, density 17,000 gauss, roll
surround for small enclosures, cast basket,
aluminum voice coil. Wharfedale Div. British
Industries Corp., Port Washington, N. Y.
1. Super 8" full -range speaker
$26.50
2. Super IO" full -range speaker
47.50
3. Super 3 treble speaker
26.50
4.
5.
W15 15" woofer
W 12 12" woofer
89.50
52.50
WIGO
Model CX-212 12" Coaxial. The CX -212 consists of a 12" extended range woofer, plus a
twin -tweeter array with a built -in crossover
network.
Specifications: Type 2-way ; power handling
capacity 30 watts ; impedance 16 ohms; fre-
quency response from 30 to 15,000 cps; magnet weight 29 oz.; free air resonance frequency 40 cps. Price $79.50. Other features:
flux density 12,500 gauss. United Audio Products, 12 W. 18 St., New York, N. Y.
1. ERD -2 extended range (12 ")
$ 59.50
2. CX -2 twin- tweeter array
20.00
3. ER -85 extended -range (8 ")
21.00
4. TW -400 tweeter (4 ")
12.50
WD -155 super woofer (16 ")
5.
169.50
WILDER
Twin -Stereo, Model 808 -A Loudspeaker. An
8 -in. speaker sold in matched pairs for stereo.
The 808 -A has a rugged die -cast basket and
close- tolerance cone.
Specifications: Type 8" with whizzer ; power
handling capacity 25 watts ; impedance 8
ohms ; frequency response from 30 to 17,000
cps ; magnet weight 16 oz ; voice coil diameter
2 in.; free air resonance frequency 44 cps;
recommended enclosure volume 3 cu. ft. Dinmensions: 8',4" din. 4%" deep ; mounting dimensions, '4 -in. holes on 7%" circle; cutout
diameter 6% "; weight, 11% lbs.. Price $64.75
net. Wilder Engineering Products, 2013 N.
Halsted St., Chicago, Ill.
1208, 12" matched twin stereo
speakers
$79.75
2.
12200 -A, 12" biaxial, full -range
speaker
39.95
3. 12145, 12" biaxial, wide -range speaker 23.95
4. 8220 -A, 8" biaxial full -range speaker. 32.45
5. 8172 -A, 8" biaxial, wide -range speaker 21.95
1.
LOUDSPEAKER SYSTEMS IN ENCLOSURES
ACOUSTIC RESEARCH
AR -3. The AR -3 is a three -speaker full -
range system utilizing the patented acousticsuspension principle. In this principle the
woofer cone is mounted on very free suspensions, so compliant that they are unable to
provide the elastic restoring force normally
required of them. The elastic restoring force
is supplied by the pneumatic spring formed
by the air within the cabinet. Both the 2 -in.
mid -range and the 1% in. tweeter utilize
hemispherically shaped diaphragms as direct
radiators.
ALTEC
AUDIO -TECH
Model 831.4 "Capistrano." The elegant simplicity of the Capistrano, selected for its excellence of design in the California Design
exhibit, is an ideal complement to the precision- engineering sound components it encloses. The Capistrano is equally appealing to
the decorator and the audiofan.
Specifications: Type of enclosure, reflex ;
speakers
l.f., 1 h.f. on horn ; power handling capacity 30 watts; impedance 16 ohms;
frequency response from 35 to 22,000 cps.
Dimensions: 47" wide, 30" high, 23',41" deep;
120 lbs.; finishes available and prices : walnut,
mahogany $399.00. Altec Lansing Corporation,
1515 S. Manchester Ave., Anaheim, Calif.
I. 830A "The Laguna "
woofers, h.f
ME -12 Loudspeaker System. This unit has a
continuously adjustable tweeter output from
zero to maximum. Color coded binding posts
for easy stereo connection. Guaranteed for 2
years against defective materials and for
workmanship.
-1
-2
horn
$599.00
832A "The Corona" -cor spkr, similar to "Capistrano"
399.00
3. 833A "The Verde"-with 602B "Duplex" spkr
309.00
4. 700B "The Melodist "
-spkr bookshelf
126.00
2.
-2
ARGOS
Specifications: Type of enclosure sealed ;
speakers 12" l.f., 2" m.f., 1%" h. f. ; type of
crossover network L -C; impedance 4 ohms;
sensitivity (watts input for + 85-db level 10
feet on axis) 1.39 watts ; magnet weights :
1.f., 53 oz. ; m.f., 53 oz. ; b.f. 17 os. ; voice coil
diameters : l.f., 2" m.f., 2" h.f. 1%" ; Dimensions : 25" wide, 14" high 11 -3/9" deep ;
weight, 52.5 lbs. ; finishes available and prices
Mahogany or natural birch, $216.00; unfinished pine $203.00; Walnut, oiled walnut,
cherry, korina, or teak $225.00. Accessories:
Speaker stand $30.00; speaker base $7.50,
Acoustic Research, Inc., 24 Thorndike St.,
Cambridge, Mass.
1.
2.
AR -2a, mahogany or birch
AR -2, mahogany or birch
$122.00
96.00
PHF-1S Petite. The Petite is a very small,
slim profile (only 3%" deep) two -speaker system. It incorporates a new Jensen high -compliance woofer, designed especially for Argos.
The Petite may be used anywhere -shelf,
table, wall, or floor. Construction is of %"
hand rubbed oiled walnut with cane grill cloth.
Specifications: speakers 1 1.f., 1 h.f.; power
handling capacity 10 watts ; type of crossover
network capacitor; impedance 8 ohms; frequency response
+ 5
db from 50 to 15,000 cps
;
other features volume control, hanger brackets
for wall, solid brass attachable legs. Dimensions: 18" wide 12" high, 3%" deep; weight,
81,4 lbs. ; finishes available and prices : hand
rubbed oiled walnut, $24.95; Argos Products
Co., 301 Main Street, Genoa, Illinois.
2- speaker shelf, fabric covered
$24.95
TSE -2AS 2- speaker shelf, oiled walnut
39.95
3. TSE -3A5 3- speaker shelf, fabric covered
39.95
4. TSE -4AS 3- speaker shelf, oiled wal1.
TSE -1S
2.
nut
59.95
so
Specifications: Type of enclosure infinite
baffle ; speakers 12" 1.f., 3" h.f.; power handling capacity 30 watts ; type of crossover network, capacitor ; impedance 16 ohms; frequency response from 40 to 20,000 cps ; magnet weights : l.f. 92 oz. ; h.f. 1.47 oz. ; voice
coil diameters : 1.f., 2" ; h.f. 3" ; other features fused to protect against overload. Dimensions : 14" wide, 24" high, 12" deep ;
weight, 35 lbs. ; finishes available and prices :
hand rubbed oiled walnut, $129.00. Audio
Tech Laboratories, 3420 Newkirk Avenue,
Brooklyn, N. Y.
1A-15 loudspeaker system
1.
AmericanRadioHistory.Com
$250.00
BOZAK
Urban Speaker System. Although
small in size, the Bozak B -302A possesses the
same musical sensitivity featured by all Bozak
speaker systems. It is ideal for small listening rooms or in pairs for stereo. The B -302A
contains one Bozak 207A two -way speaker.
one B -209A midrange speaker and one 10102
crossover network to provide crossover at 875
B -302A
cps.
AUDIO
.
AUGUST, 1962
'e
TR -1
15
watt mobile transistorized
p.a. amplifier
'
TR -2
30 watt portable transistorized
DC or AC /DC p.a.
amplifier
O
`s
No
\
Plug -in-accessories
Plug -in- accessories
Universal mounting
with LC -5 Carrying Cover
Harman -Kardon offers more operating features, more application
versatility, more value than any other mobile or portable public
and they're transistorized !
address amplifier ever made
...
With the new Troubador Series, Harman -Kardon introduces exciting new potentials for mobile and portable p.a. amplifiers.
Never before has there been equipment offering the extra value,
the operating facilities and the flexibility of these advanced new
units. For rentals, for regular and unusual applications, the
TR -1 and TR -2 provide dramatic performance and economy benefits. The TR -1 will find use in police, fire, marine, military, construction and other mobile commercial applications where
battery or ignition power is available but AC is not. The TR -2, in
addition, includes on- chassis provision for optional AC -to -DC
converter to give it limitless applications in schools, hospitals,
anywhere an amplifier is needed regardless of power
stores
source. Automatic switch -over to DC in event of AC power failure
makes this the only amplifier to offer uninterrupted service. It
is also the long -awaited answer for emergency control work.
TR -1 Simultaneous 2- channel operation: 1 mic, 1 music
Plug -In preamplifier module with equalization for tape head and
mag phono
Universal mounting -TR -1 is free standing, also
mounts flush on dashboards, panels, etc. Mounting brackets
...
Built
For full details, write: Commercial Sound Div.
AUDIO
by Sound Men
permit installation on all surfaces in all positions. Removable
without disturbing brackets Provision to turn amplifier on or
off from remote location or microphone Constant voltage output in addition to voice coil impedances Can't damage amplifier by grounding chassis or incorrect polarity 4- position filter
And many other
for maximum tone and acoustical control
flexible operating features.
TR -2 Simultaneous 4 channel operation -2 mic, 2 music
OnProvision for on- chassis AC -to -DC solid state converter
chassis facilities for operation from AC with optional plug -in
converter Plug -in accessory provides automatic switchover to
Plug -in preamplifier module
DC in event of AC power failure
with built -in equalization for tape head and mag phono Facility
to turn amplifier on or off from microphone or remote location
Master Volume Control Separate Bass and Treble Controls
Constant voltage output (25v & 70v balanced & unbalanced)
Can't damage amplifier
and variety of voice coil impedances
De Luxe Carrying
by grounding chassis or incorrect polarity
Cover Many other valuable operating and installation features.
for Sound -Alen
harman kardon
AUGUST, 1962
Desk,
B -8,
Plainview, L. I., New York
61
AmericanRadioHistory.Com
1.
Duke -10 tweeter
$ 79.50
2. Duke -30 wide -range system
3. Duke -40 wide -range system
4. Duke -50 bookshelf system
Specifications: Type of enclosure infinite
baffle; speakers one l.f., one m.f., two b.f. ;
power handling capacity 20 -60 watts; type of
crossover network three -way LC, 6 db. /octave
at 800 and 2500 cps ; impedance 8 ohms ;
frequency response ± 3 db from 40 to 20,000
cps ; magnet weights : 1.f., 24 oz. ; m.f., 24 oz.;
h.f. ; 16 oz. ; voice -coil diameters ; 1.f., 1,/j" m.f.,
11/2" h.f. %" ; other features full three -way
speaker system in fine furniture cabinet. Dimensions : 24" wide, SO" high, 20" deep; weight
80 lbs. ; finishes available and prices : walnut,
mahogany, ebony $254.50; French Provincial
cherry $290.00. Accessories: C -305 t7 matching
equipment cabinet $285.00. R. T. Bozak Mfg.
Co., P.O. Box 1166, Darien, Conn.
1. B -305 Urban speaker system
$397.50
440.00
2. B -305 Provincial speaker system
495.00
3. B -4000 speaker system
4. B -310A speaker system
770.00
5. B -3001 small two -way speaker system
174.50
CABINART
Mark 3. An 8" extended -range loudspeaker
system using bass reflex principle of operation with a unique horn coupling to the air.
This principle enables the total back radiation to be effectively used thus maintaining
critical damping while increasing the bass
response.
Specifications: Type of enclosure bass refez-horn ; speakers 8" 1.2. power handling
capacity 10 watts ; impedance 8 ohms ; frequency response ± 7 db from 70 to 19,000 cps ;
sensitivity (watts input for + 85-db level 10
feet on axis) 1/i watt ; magnet weights ; 1.f.
6.8 oz. ; voice coil diameters ; l.f., 1" ; other
features 3" whizzer cone, resonant frequency
of speaker (free air) 65 cps, dual -diameter
Alnico 5 magnet. Dimensions : 23" wide, 11"
high, 91/2" deep ; weight, 27 lbs. ; finishes available and prices : unfinished $18.00 ; oiled walnut $30.00. Cabinart Acoustical Dev. Corp.,
34 Geyer St., Haledon, N. J.
DUKANE
Ionovac Speaker System. Utilizing ionized
air instead of the conventional speaker diaphragm for converting electrical pulsations
into sound, the "Ionovac" high- frequency
speakers are available either separately or as
part of a complete speaker system such as the
Duke-20 full -range system shown. Heart of the
speaker is a small open -end quartz cell, no
larger than the eraser on a pencil, in which
air is confined in a chamber which narrows
down to a tiny aperture. Within the small
space air molecules are bombarded with a
high -frequency, high -voltage current which
knocks sufficient electrons free to ionize the
air. The ionic cloud is modulated by signals
from the amplifier and is then fed into a small
horn which delivers them efficiently to the
room as sound waves. The "Ionovac" has a
frequency range from 3500 to 20,000 cps. The
Duke-20 includes two midrange speakers and
a 12 -in. high -compliance woofer in addition to
the "Ionovac." Dukane Corp., St. Charles, Ill.
User net price $187.50.
199.50
149.50
139.50
$60.00. ERA Dynamics Inc., 67 Factory Place,
Cedar Grove, N. J.
1. Wafaire, Bi- Phonic Coupler
$ 80.50
2. 440, Bi- Phonic coupler, walnut
134.40
EICO
FISHER
HFS -5 2 -Way Speaker Spatens. The Model
HFS -5 provides fine bass from a bookshelf size enclosure. It is a two -way system including an 8" bellows- suspension woofer and a
3%" closed -back tweeter. Frequency division
is accomplished by a high -pass capacitor filter
at 2000 cps ; a level control is provided for
the tweeter.
The enclosure is constructed of 3/4" stock
and is tuned to 45 cps by a tubular ducted
port. A system Q of % means that the speaker
is critically damped when used with any
modern amplifier of normal damping factor
(7 -20). Critical damping gives the smoothest
possible frequency response and the best
transient response.
Specifications: Type of enclosure ductedport reflex; speakers 8" I.f., 3%" h.f. ; power
handling capacity 25 watts ; type of crossover network bridging capacitor and h.f.
level control ; impedance 16 ohms ; frequency
response ± 5 db from 52 to 14,000 cps ; magnet weights : 1.f. 10.7 oz. ; h.f., 1.47 oz. ; voice
coil diameters : 1.f. 2 "; h.f. 1/s" ; dimensions
12%" wide, 24" high, 10" deep ; finishes available and prices : unfinished birch $47.50 kit,
$56.50, wired ; oiled walnut $59.50 kit,
$69.50 wired. Electronic Instrument Co., Inc.,
3300 Northern Blvd., L.I.C., N. Y.
Model RP -4A Bookshelf Speaker System.
The XP-4A is a four -speaker, three -way system of bookshelf size requiring only 10 watts
of amplifier power to give full volume in
the average room.
Specifications: Type of enclosure high resistance darted port ; speakers -12" l.f. (2)
5" m.f., hemispherical h.f. ; power handling
capacity 60 watts ; type of crossover network
LC; impedance 8 ohms ; frequency response
:
ELECTRO -VOICE
:
Regina Ultra -Compact System. The Regina
was developed in answer to the demand of
discriminating listeners for a system with
minimum depth. This thin speaker is made
possible by a refinement of E -V wide -range.
low resonance systems. Less than six inches
in depth, the Regina delivers performance
equal to that of larger systems and may be
used with the E -V Leyton depending upon the
requirements of the room setting.
Specifications: Speakers 10" l.f. 5" h.f.;
power handling capacity 20 watts ; impedance
8 ohms; frequency response from 50 to 15,000
cps ; EIA sensitivity 43 db ; magnet weights :
1.f. 22 oz. Dimensions : 16%" wide, 24%" high,
5 %" deep; weight, 22 lbs.; finishes available
and prices : oiled walnut, $89.50. ElectroVoice, Inc., Buchanan, Michigan.
Princess, 2 -way system, walnut
Leyton, 2 -way system, walnut
Esquire, 3 -way system, walnut
Regal, 3 -way system, walnut
5. Royal, 3 -way system, walnut
1.
2.
3.
4.
from 28 to over 20,000 cps ; magnet weights;
l.f., 22% oz. m.f., 31/! oz. ; h.f. 17 oz. ; voice
coil diameters l.f., 2" m.f., 1" h.f., 2" ; other
features -unit construction eliminates need
for metal speaker frame. Also features self dumping long -travel bass speaker. Dimensions :
241/2" wide, 14" high, 121/1" deep ; weight,
50 lbs. ; finishes available and prices : mahogany, walnut, cherry, $199.50. Unstained
birch $189.50. Accessories : LE-1 Univ. Base
$9.95. Fisher Radio Corp., 21 -21 44th Drive,
L.I.C., N. Y.
1. XP-1A, 3 -way speaker system, mah
$129.50
2. XP -2A, 3 -way speaker system, mah
84.50
3. KS -1, 3 -way speaker system kit, unfin-
$ 53.00
89.50
136.00
179.00
249.50
EMI
EMI Model DLE 529 Bookshelf Loudspeaker
System. The Model DLS 529 features a handmade 13%" x 8%" elliptical woofer with
patented aluminum cone and plastic suspension and two 3%" high- frequency units with
hand -made curvatures. The %" thick hardwood cabinet has specially treated internal
damping to eliminate cabinet resonancees,
standing waves, or any other parasitic vibrations. In genuine figured walnut veneer and
handsome, practical metal grille.
Specifications: Type of enclosure sealed ;
speakers one l.f., two h.f. ; power handling
capacity 15 watts; crossover 4500 cps ; impedance 4 ohms ; frequency response from 40
to 15,000 cps. Dimensions : 13" wide, 24" high,
12,4" deep ; weight, 50 lbs. ; finishes available
and prices : oil and satin walnut, $159.00.
Scope Electronics Corp., 10 Columbus Circle,
New York, N. Y.
ERA DYNAMICS
"Minnie" Bi- Phonic Coupler. :\ miniature
version of the bi- phonic coupler speaker system wherein the front panel (wood) is used
as the cone of the woofer.
Specifications: Type of enclosure by- phonic;
speakers, 1, 1.f., 1 h.f.; power handling capacity 20 watts : type of crossover network
LC ; impedance 8 ohms ; frequency response
± 3 db from 35 to 20 k cps ; magnet weights :
l.f., 10 oz. ; b.f. 1.47 oz ; voice coil diameters :
l.f. 1" h.f., %" ; dimensions : 13%" wide,
18" high, 2" deep ; weight 5% lbs. Price
64.50
ished walnut
GOODMANS
Model G -5 -Dekorator" Cabinet System.
The Model G -5 is a 5- speaker 4 -way system.
Employs the new 12" Superfoam Floating
Piston Cone, which has sufficient stiffness and
added mechanical resistance to provide uniform response within the woofer range of
20 to 2000 cps. Crossing over at 500 cps,
a heavy -duty 8" closed -back free -edged speaker
handles the frequencies from 500 to 2500
cps. Two new heavy -duty shielded closed back 3%" tweeters uniformly re-enforce the
mid -range from 2500 to 7500 cps. The new
hemispherical
dome -lens
omnidirectional
compression ultra -high- frequency horn tweeter
takes over to handle frequencies from 7500
up.
Specifications: Type of enclosure infinite
baffle ; speakers
l.f., 1 m.f., 3 b.f., power
handling capacity 60 watts ; Impedance 16
ohms ; frequency response ± 8 db from 30 to
20,000 cps ; sensitivity (watts input for + 85db level 10 feet on axis) 1/á watt; magnet
weights : l.f., 1% lbs. ; m.f., % lb. ; h.f., 11
oz. ; voice coil diameters : l.f., 3" ; m.f., 1" ;
h.f., 1 ". Dimensions : 20" wide, 28" high,
6 %" deep; weight, 60 lbs.; finishes available
and prices : oiled walnut, $139.50. Rockbar
Corp., 650 Halstead Ave.. Mamaroneck, N. Y.
1. G -1, three -speaker system, 30 watts..$56.50
2. G -2, three -speaker system, 40 watts.. 59.50
3. G -3, five- speaker system, 45 watts .. 79.50
4. C -4, five- speaker system, 60 watts .. 89.50
-1
HARTLEY
Hartley -Luth Holton Type "B ". A fine furniture type of enclosure featuring, as in all
Hartley cabinets, the Soundsorber for acoustic
treatment of the rear wave and cabinet resonance. Front grille of Raffia for transparent
sound. Total materials used for Soundsorber
over 70 square feet. For the modern or contemporary home. Type "A" for the traditional
or conservative surrounding. Utilizes any of
the full -range Hartley speakers. No crossovers
or networks needed.
AUDIO
62
AmericanRadioHistory.Com
AUGUST, 1962
THE
FINEST
STEREO
HEADPHONES
YOU'VE
EVER
HEARD
J
e nsen
MANUFACTURING COMPANY
Division of The Muter Co.
Jensen's new HS -1 Stereo Headphones are ready for you. We think you will
agree with the experts who say they are the finest ever. Reasons? They cover the
frequency range with extra smoothness because they have new fluid -damped
transducers developed by Jensen. And they are good to look at, easy to adjust,
you don't get tangled up.
comfortable to wear. Cord comes out one side
Impedance 8 ohms. Complete with Jackbox for connecting to any stereo ampli-
...
fier. Write for Brochure MH.
Hs -1 With 3 conductor plug and accessory jack
Hs -tL With 4 spade lug terminals
Jensen Manufacturing Co., 6601 S. Laramie Ave., Chicago 38, III.
AUDIO
/
box
Net
Net
$24.95
22.50
Canada: Radio Speakers of Canada, Ltd., Toronto
AUGUST, 1962
63
AmericanRadioHistory.Com
Specifications: Type of enclosure infinite;
power handling capacity 25 watts; type of
crossover network, none ; impedance 8 ohms ;
frequency response ± 3 db from 20 to 20,000
cps ; magnet weights, 5% lbs. Dimensions :
24" wide, 34" high, 13" deep ; weight, 80 lbs.;
finishes available and prices : oil walnut, mah.
$245.00. Hartley Products Co., Inc., 521 E.
162 St., New York 51, N. Y.
1. Hartley -Luth Holton style "A" with
220MS spkr
2. Hartley -Luth Holton style A or
$245.00
B
w
B
w.
312 spkr
3. Hartley -Luth Holton style A or
215.00
310 spkr
195.00
Jr. oiled walnut w. 220MS
spkr
195.00
155.00
5. Holton Jr. oiled walnut w. 312 spkr
to 30,000 cps. Dimensions, 24%" wide, 13%"
high, 11 %" deep. Available in walnut, mahogany, and birch, $124.95. Neshaminy Electronic Corp., Neshaminy, I'a.
JENSEN
3 -way Loorispeater System. This
Jensen speaker system has slim propor
Boning and will adapt to almost any decor.
Specifications: Type of enclosure, ducted
port; speakers -10" If., 8" m.f., doing b.f.
power handling capacity, 25 watts ; impedance,
8 ohms ; frequency response from 30 cps to
TR -9 Slim
new
4. Holton
IMF
IMP Styrene -Pressure Loudspeaker System.
Uses polystyrene mass cone for accuracy in a
dynamic loudspeaker. Treble handled by phase loaded pressure unit, providing very wide dispersion and smooth response.
Specifications: Type of enclosure resistive
loaded ; speakers
I.f., 1 b.f.; power handling capacity 30 watts; type of crossover
network capacitive ; impedance 16 ohms ; frequency response from 25 to 16k cps. Dimensions : 161/2" wide, 26%" high, 111" deep;
weight, 30 lbs., approx. ; finishes available and
prices : oiled walnut $200.00. Others to be announced. Lectronics of City Line Center, 7644
City Line Ave., Philadelphia, Pa.
1. IMF ribbon speaker system
$190.00
-1
2. IMF Standard -Pressure system
90.00
3. IMF -Radford System
500.00
4. IMF Orthophase (price to be announced)
I
SOTON E
EROICA. Continously- folded, extended, air
column with constant -impedance air-mass loading.
Specifications: Type of enclosure 3 -way
patented ; speakers-12" 1.f. 8" m.f., compression h.f. ; power handling capacity 40 watts;
impedance 8 ohms; frequency response ± 2 db
from 30 to 16,000 cps ; magnet weights : 1.f.,
80 oz. ; m.f., 24 oz. ; b.f., normal oz. ; voice
coil diameters : l.f., 1%" ; m.f., 1" ; other features pneumatically controlled transducer assembly action.
Dimensions : 15" wide, 40" high, 22" deep ;
weight, 140 lbs. ; finishes available and prices:
oiled oak, mahogany $299.00. Isotone Associates, 3402 Third Ave., New York 56, N. Y.
1. "Cellini," 2 -spkr,
cu. ft.
$ 65.00
2. "Egmont," 2 -spkr, 2 cu. ft.
110.00
1
JANSZEN
Z -500 Speaker System. The Z-500 uses the
well -known JansZen Electrostatic mid /highrange tweeter in a single- radiator version
that reduces cost and cabinet size. The electrostatic tweeter is acoustically paired in
the Z -500 with a special 11 -in. Model 350A
dynamic woofer. Frequency range from 30
work LC; impedance 8 ohms ; frequency response from 40 to 15,000 cps ; magnet
weights : 1.f., 20 oz. Dimensions : 23 7/16"
wide, 14" high, 13 5/16" deep ; weight, 35 lbs;
finishes available and prices mahogany, walnut, blonde $64.50 ; oil walnut, unfln. birch
$59.50. Lafayette Radio Electronics, 111 Jericho Turnpike, Syosset, L. I., N. Y.
$82.50
I. Elliptoflex with SK -210 spkr
66.50
2. Elliptoflex with SK -180 spkr
:
JBL
HEATH
3. Acoustic suspension speaker sys
59.95
4. "Legato Compact" deluxe speaker sys 239.95
transition from front to rear (cone) radiation.
Specifications: Type of enclosure ducted
port; speakers -12" 1.f., 3" h.f. ; power handling capacity 20 watts; type of crossover net-
Trimline 54 Speaker System. The JBL Trim line 54 couples the LE8T speaker and an 8"
woofer to a new enclosure. The new enclosure is designed to double the effective
radiating area at low frequencies. The 54 is
of the new thin speaker genre and may be
free standing or hung from a wall. Hanging
brackets are provided. The enclosure is finished on four sides and may be used either
vertically or horizontally.
Model AS -22 "Profile" Speaker System.
"Profile" is a slim new Heathklt 3 -way system
speaker -Just 5 in. deep. Versatile in performance, it uses a special 10 -in. woofer of
inverted design, plus a 6 -in. midrange and a
3% -in. tweeter with closed backs for perfectly
balanced, natural sound. Factory assembled
cabinets are available in walnut finish or in
unfinished white hardwood suitable for the
finish of your choice.
Specifications: Type of enclosure, tube tuned ; speakers, 10" 1.f., 6" mi., 3%" h.f. ;
power handling capacity, 25 watts ; type of
crossover network, series capacitor ; freq.
reap. ± 5 db from 55 to 12,500 cps ; magnet
weights -l.f., 16.1 oz ; m.f., 2.16 oz ; h.f. 2.15
oz ; voice coil diameters -1.f. 2" ; m.f., 3" ;
h.f., 9/16" ; factory assembled cabinets of
%" furniture -grade plywood. Dimensions :
19 %" wide, 25" high, 5" deep ; weight, 31
lbs ; AS -22U, unfin. white hardwood, $49.95 ;
AS -22W walnut, $54.95. Heath Company.
Benton Harbor, Mich.
1. AS -81 miniature speaker sys
$ 17.50
2. AS -51 speaker sys
39.95
low- frequency response by providing a smooth
beyond audibility. Dimensions, 23%" wide,
/VA" high, 5 %" deep ; weight, 25 lbs ; finish
available, walnut. Price, $89.95. Jensen Manufacturing Company, 6601 S. Laramie Ave.,
Chicago 38, Ill.
1. 3 -P, 4 -way sys ..$119.50, $139.50, $159.50
99.50
2. TF-3, 4- speaker 3 -way sys, walnut
3. TF-2, unfinished 3- speaker 2 -way sys 64.50
4. X -20, 3- speaker 2 -way sys
39.95
29.75
5. X -10, 2 -way sys
KLH
Model Six Compact Loudspeaker System.
Combining an acoustic suspension woofer of
unusual design, in which the frame and magnet assembly become integral with the baffle
panel, with a tweeter comprising a thin
Bakelitized diaphragm with a maximum excursion of 1 /16 in., the over -all performance
belies the small size of the enclosure.
Specifications: Type of enclosure, acoustic
suspension : speaker, 1 1.f., 1 h.f.: power
handling capacity, 75 watts ; type of crossover network, L -C: impedance, 8 ohms ; freq.
resp. 32 to 16,000 cps ; crossover point, 1500
cps ; dimensions : 23%" high, 12%" wide,
11TÁ" deep, weight, 35 lbs. Available in mahogany, $129.00 ; oiled walnut, $134.00 ; unfinished, $119.00. KLH Research and Development Corp., 30 Cross St., Cambridge 39, Mass.
Model 7, 2.6 cu. ft. spkr
sys
$189.00 to $196.00
2. Model 10, similar to Mod
6, thinner
86.00 to 94.00
1.
KLIPSCH
KB -100 Klipschorn. A horn is a different
structure and serves a different purpose than
an enclosure. The Klipschorn is thus distinct
from an enclosure In that the diaphragms are
loaded for lower distortion, higher acoustic
output, and more nearly perfect transient
response.
Specifications: Type, 3 -way horn ; speakers
-15" 1.f. compression m.f. and b.f.; power
capacity. 3 acoustic watts output for 0.1%
maximum FM distortion ; crossover network,
balancing ; impedance, 16 ohms ; frequency response, 5 db from 30 to 19,000 cps ; sensitivity (watts input for + 85-db level 10 feet
on axis), approx. 0.1 watts ; dimensions, 31"
wide, 51" high, t9" deep ; weight, 170 lbs.,
available in mahogany, walnut, and maple,
$852.00 ; unfinished fir, $514.00. Klipsch and
Associates, Hope, Arkansas.
1. Cornwall, 3 -way speaker sys.
$408.00
+_
2. Model H,
3 -way
speaker sys
221.00
LAFAYETTE
" Elliptoflex" Enclosure with SK-58 Speaker.
The Elliptofiex enclosure is a ducted port system wherein the port is elliptical in shape
and is located directly in front of the speaker.
This unique system is designed to improve
Specifications: Type of enclosure reflex;
speakers -8" l.f., 8" m.f. /h.f. ; power handling
capacity 25 watts ; impedance 8 ohms magnet
weights : l.f., 6% lbs ; voice coil diameters : l.f.,
2 ". Dimensions : 23%" wide, 20" high, 5 %"
deep ; weight, 29 lbs. ; finishes available and
prices : walnut, mahogany, ebony $117.00. Accessories : solid brass legs (pair) $12.09. James
B. Lansing Sound, Inc., 3249 Casitas Ave.,
Los Angeles, Calif.
1.
2.
Lancer 33
Lancer 66
$
LEAK
"Piston- Action" Sandwich Speaker System.
The Leak piston -action speaker system is a
new concept in speaker design. The cone is
polyfoam which is given 200 times the structural strength by a "sandwich" of aluminum
skins. It thus behaves in the manner of the
theoretical piston.
Specifications: Type of enclosure sealed;
speakers 1 I.f., 1 h.f. ; power handling capacity
50 watts : type of crossover network (2) %sections with additional elements on tweeter;
impedance 15 ohms ; frequency response + 2.5
db from 30 to 18.500 cps; voice coil diameters : m.f., 2" ; h.f. 1" ; other features : special 13" polyfoam girder construction sandwich cone eliminates breakup distortions.
Dimensions : 15" wide, 26" high, 12" deep;
weight, 49 lbs. ; finishes available and prices :
Scandavian walnut, $199.00. Ercona Corp., 16
W. 46th Street, New York, N. Y.
MONARCH
Controlled -Resonance 2 -way System. This
small cabinet size is made possible by the
use of the "controlled resonance" principle
employing plastic tubes of varied lerf$ths and
shapes to reduce unwanted resonance to inaudible levels. The cabinet is finished on four
sides, and is fitted with a tweeter control.
Specifications: Type of enclosure ducted
reflex ; speakers -1 l.f., 2 b.f. ; power handling
capacity 30 watts ; impedance 16 ohms ; fre-
AUDIO
64
AmericanRadioHistory.Com
93.00
147.00
AUGUST, 1962
1.
Jl':6;,'+.lf
NAPE IN
Perhaps two years from now the quality of this
a
m% be dull cated ... perhaps never!
USA
Soundcraft Golden Ton
=.
a
ph
A
Warranted? Yes. Here's why. Golden Tone is
a
bold claim? Yes.
very special tape
.
.
designed just for those who demand the finest performance from today's
advanced recorders. Unless you have the discerning ear and the exacting equipment which ordinary tapes
can't satisfy, there is no reason fur you to buy Golden Tone.
A
special magnetically- active FA-4 oxide formulation increases Golden Tone's high frequency output by
25 %. Its signal -to -noise ratio is
range possible wit
7
db
better than other brands, to give your recordings the greatest dynamic
tape. Precision -slit Golden Tone is free of edge burrs and skew. These physical defects
can be cruelly exposed by the narrower tracks in 4 -track recording. Microscopic burrs prevent the tra.1-s on
the edge of the tape from making intimate head contact, resulting in loss of "'highs."
Skew, another hidd3n defect, produces cross -talk and loss of recording level. Golden Tone's oxide formulation
effect which can also prevent tape to head in'iirr,acy
and base are balanced to prevent cupping or curling, an
Golden Tone's oxide surface is Micropolished. This patented
Soundcraft process removes any surface irregularity, pre-
vents drop -outs, protects high frequency response and
minimizes head wear.
GOLD
From this physically perfect tape, comes musically perfect
TONE
. SL1.1604 YIUtlllC vrE
sound. Golden Tone costs more, but it is worth more. It is
o.
produced in small quantities with infinite care and rigid
quality control. It is the world's finest tape for those who
f,.:+E:M
demand the ultima:e in sound reproduction. Offered for the
first time anywhere-a long play Golden Tone tape
on
1
mil
Mylar *, TENSILIZED by DuPont -will not stretch or break.
Also on
1/2
mil "Mylar" and
11/2
mil Acetate Bases.
z,cUNDCRAH
. ._..
AmericanRadioHistory.Com
CORP
r.Awucr.
se 25 to 18,000 cps. Dimenquency rest
sions: 231/2" wide, 14" high, 113í" deep.
Swedish
Finished in
walnut. $69.95. \Iomtrch
Electronics International, Inc., North Holly wood, California.
deluxe controlled- resonance away sys
$84.95
SP -80C 8 -in. plus tweeter, 2 -way sys
49.95
I.
2. CS -20 B, 8 -inch coaxial speaker
3. CS -16 A, 61/2 -inch mechanical 2 -way speaker
4. CS -183, Woofer 314 -inch, tweeter 244 -inch
NORDIC
pact, higlr
Nordic I Speaker Syxlcar. (
frequency design with clean response. features
patented 8" speaker with nulti -Myer free
floating cone; distortion 1e;, lull -luk cps,
-
1.5% 10k --15k cps.
Specifications: Type of enclosure bookshelf;
speakers N" LC: 5" 11.f.; power handling eapality 20 music power watts; impedance N
ohms: frequency rtspunse from 45 to IN,000
cps. Dimensions: 223í" wide, I0:s" high.
Iba. 1'iuislies available
deep; weight IN
and pricers: Scandivariiin ¡rain ,t or teak.
559.50. 1:reema Corp., I6 \Y, 11th St., New
York 36, N. Y.
PILOT
full -knnye
RAVENSWOOD
-N
nett
Dyu:nni fort
1.
:
frequncy response ± 6 rib from 411 to
cps; magnet weights: I.f., 27 oz.:
m.f., 1.57 oz.: h.f., 7.17 oz.; voice coil diameters: I.f., 258' n,.f., 'SS" hat., 'S3" uthrr
features mid-range and I erecter level controls,
5'54" wide,
finished on 4 sides. Dimensions
:
141/2" high, 12" deep; weight 42 1bs, ; finishes
available and prices: laryurrrd walnut, oiler)
walnut, nialiayatip. $119.50. Pilot Radio I'orp.,
37 -06 36th St., New York. N. Y.
2.
PSV -3
$69.50
64.50
PIONEER
(hS -.ill
kooi.'I
.1
IJ
''p, uk,r sys /em. A
_ -wary
luvert.'r principle
a
;
;
M -9 Reflection Coupler,
bookshelf
2. M -7 Reflection Coupler,
3 -8 ", 1- 31/2"
3. M -6 Reflection Coupler,
2 -8 ", 1- 31/2"
H. H. SCOTT
t
-
system
.t-way Loa,INI" akcr' Syxlc cur. ea l> 9 ","
deep, it is of true Iaookxhelf size. 'l'be .s :; ou
silts of a 10" law- resonance high -excursion
woofer, and separate wide -dispersion midrange and tweeter units, all contained within
strikingly handsome cabinet. The 3 -way
at
the
separate
crossover
network
blends
speakers into n single sound source. Testing
techniques pioneered by II. II. Stott assure
virtually ideal matching front speaker to
speaker for exact ,t eleo balance.
NpeciJlcatioa.V- Type of eutlosure bookshelf ;
Lt.. 5" nt.f.. 1" h.f.: power ltuuspeakers
dliug capacity 3o watts; type of crossover
N -.t,
I
-/0"
network air coil
.t- tcatl; intpeduue 16 ohms;
sensitivity (watts input for +N5 rib level lo
feet on axis) 12 watts; divausioos: 2.iI_"
wide, //N" high, 931" deep; weight, 37 ihs
finishes available and prices: Cn. Pine
$119.95; I ii. hardwood $129.95; walnut Or
mahogany $1.14.95. 11. H. Sesui t Inc.. I l l
Ibwdermill Bond, Maynard, Mass.
I. S -2, 3 -way loudspeaker system from $179.95
2. SK -4, 3 -way loudspeaker system kit,
79.95
unf. pine
:
$124.95-$149.95
74.95-
84.95
49.95-
55.95
REALISTIC
I.'1ectrontat 7'nu- Speaker System. An electrostatic high- frequency unit combined with a
cone -type woofer.
Specifications: Type of enclosure acoustic
xuxpcnsiun speakers 1 11., (4) electrostatic
elements h.f.: is.weer handling capacity 20
watts; type of crossover network Lt'; impedance N ohnis frequency response front 43
to 25,000 cps; voice coil diameters: 1.f., /"
other features power- for electrostatic Ite.i Iiru,
dcr-ircd from pourer line, a.c. switch furnixhcd.
Has 111,11,,' lrrel control. Diuteusiuus: 13"
wide, .2'2 high 12" deep; weight, 27 lbs.;
finishes available and prices: mahogany
and lruktr011d $61.93.
$.79.95 ; wile d oral II
Radio Shack, 730 I'uuuuuuwcaltit Ave., Boston
;
which is aptoday's compact borne.
of enclosure bookshelf ;
2.5" h.f.: power handling capacity 20 watts; type of crossover
network t' -type attenuation 6 rib / orlare; lwspeaker
propriate for stereo in
Specifications: Type
speakers -12" l.f.. 2
pact
Phase
form of variable damping which
is urique and extremely e ;iective in controlling speaker :111.1 cabinet vesou :nnees and adapt lug the entire system to room environments.
Specifications: Type of euelosu re, llyua talc
/'ort /'hase Inverter; speakers -2 1.f., 1
lu.f. power handling eapacity 50 watts type
of crossover networks half-section nt- derived ;
Impedance 8 ohms; nutgnet weights: 1.f., 27
oz.; tn.f., 10 raz.; h.f., /.53 oz.; voie. coil diameters: I.f., / S_,"
nn.f.. 1"; h.f., 9/16"
other features variable ,10 m ping. Iimensions:
.st" ()ride, 16" high, 7" deep. t'inlshes available :nid prices: walnut 5/44.95; unfinished
5125.93. B.\VENS\\'OOD, Edgewood & MeI ;uckian Sta..
.\uuapulis,
Md.
1
:
:
krlltn,,
clue of a aerie's of
r- nui,),,.
loudspeaker systems which depend upon the
tealI surface behind the speaker tu distribute
soient waves Si. that tin > appear to originate
at a puiut soinew here M..,ond the wall. The
.11
11111118:
-I2"
_
l'tuur'Is
stiff
:
provides
PSV -2
in the
()und, this speaker may herald the future for
the industry. Completely free -stippling and
toit- critical as to placement, it radiates front
both sides in a ligure -eight pattern which
minimizes reflections from the walls and ceiling. frequency range of the speaker is 45 to
IS,000 cps and its impedance is 16 ohms. Dimensions are 31" high, 341/2" wide, 101/2"
deep at bottom. \lanufacttired in England, exclusive United States distributor is Lectronies
of City Line Center, 7644 City Line Ave..
I hlladelphla ;II. l'a. User net prie. $8.55,00.
way bookshelf speaker system is a hand'
additlun to any room. The solid bass response is produced by a 12" Air flex heavy duty woofer which is front mounted in an
Orlon fiber filled enclosure designed to yield
uutxInnuu performance. Two 31_" .-one -type
speakers produce the crisp mid- frequencies.
High frequencies are produced by a specially
designed super tweeter. This four- speaker eons!dilation, plus a crossover network, gives unparalleled performance.
Specifications: Type of enclosure infinite
I.f., (2) .11/2" m.f
baffle: speakers
31/2" h.f.; power handling capacity 30 w'alts:
type of crossover net work (s) air core in ,l -rnr.
impedance.
nor- caparilmore, 6- db- oetarr
1.
LlectroxMtii- Speaker. Perhaps
full -range electrostatic speaker
the first
-
PSI' -4 .1-Way Speaker System. This three-
16,000
structed of
QUAD
1
tbass resonators) cuula in
nuterials and
mounted on sponge rubber surrounds are utilized to extend I, w- frequeaey response with
an 8 db gain over conventional enclosures of
the name size. This is achieved by utilizing
the back -wave energy of the speaker itself, the
net result being an over -all improvement in
system etficieney while retaining the convenience of compact design. This allows for drastic reduction in size of ,abinet and produces
a low -cost speaker system equal in quality and
tone to costlier systems.
Specifications: Type of enel,siire infinite
baffle; speakers-N" ; power handling en pa city
20 watts; type of crossover networks none:
impedance N ohms; frequency response ±x.4
magnet weight 6.5 oz.:
1111 front 40 to / 5000
voice cull diameter: /" ilintensions: /N" wide,
UN" high, 91/2" deep: weight, 14 lbs.: finishes
available and prices suss, ./ walnut 334.95. this
Lang Corp.. 138 Hanoi .1v.'.. Bridgeport 4.
Conn.
evtbinet end
SP -CRI
2.
THE RUS LANG
p rte r System. flexible
kus -Lang
:
.
.
SHERWOOD
Ruriniu
speaker
.t- Way Sysststn.
system is based
The
1111
Iln'iuia
it
3 -way
rightly cuu-
atrueted enclosure. fabricated of une -inch.
solid-core veneered side walls and une -11101
resin -ú11e11 fiakebuard speaker bailie. :' front
to -back reinforcement strut lhuivates possibility of panel vibration. The grille panel ix
easily removable for grill-eluth replacement
or access tu speakers. All speakers are replaceable from the (Nast. and the crossover network
is accessible through speaker openings.
-
17, Mass.
I.
2.
Electrostat 5, oiled walnut
Electrostat 4A Mahogany
$49.95
84.95
REK-O-KUT
Sonoteer Speak, r are., u,. .\ series of high
style, 5- speaker, 3 wa) systems in fine furniture cnbinentn featuring figure eight radiation
pattern from front Mull rear. Available in conlern styles, in
temporary, provincial, spot
finishes respecwalnut, fruitwood, wind el
tively.
Specifications: Type of enclosure xtiurline;
1.f.. 2 111.f., / hi.; power handling
capacity 43 watts; type of crossover network
filter network; impeditt.-.' N ohms; frequency
response +.t -6 db from ;0 to 1N,000 cps;
sensitivity (watts input for s-, .11, level 10
feet on itxis) 0.20 watts (at 510 .psi; magnet
weights 1.1., 6.2 oz. to f.. 6.2 oz. ; h.f., 2.3
oz.; voice coil diameters: 1.1'., 1" ; m.f., 1";
h.f., 34" ; dimensions: 21" wide, 34" high. 4"
deep; weight, 18 lbs.; finishes available and
prices: solid walnut $79.93; fruit wood, ebony
$89.15. Itek -O -Kut Co., Inc., 38 19 108th St.,
Corona 68, N. Y.
speakers
Pedant* 16 ohms; frequency response ±7.5
di, from 60 to 18,0011 cps; sensitivity (watts
input for + 85 -db level 10 feet un axis) 0.4
watts; magnet weights: 1.f., 14 oz. ; h.f.,
2x E oz.; volee Boil diameters: 1.f.. 1 15/16"
h.f., % ". Dimensions: 23'h" wide, 161,:."
high, 10%" deep ; weight, .t4.2 lbs.; finishes
available Teak. Pioneer Electronic Corp.,
5 Otowueho tichoute, Bunkyoku. Tokyo, Japan.
I. CS -20 A, 8 -inch 2 -way speaker
:
-2
+
;
:
1.
CA 60, bookshelf
3
-spkr sys, wal
....559.95
specifications: Type of enclosure tube port;
speakers 12" I.f.. 8" 111.f.. .1" h.f.; power ban
tiling capacity 50 watts: type of crossover network 12- db /octare at 600 cps and 3500 cps;
impedance 16 ohms; frequency response ± 21/2
rib from 45 to 17,.700 cps; magnet weights:
Lf., 1.66 lb. ; í11.f., 6.5 oz.; h.f., 9.0 oz.; voice
coil diameters : I.f., 11/2" m.f., 1" h.f., 1";
other features high-compliance woofer attrltltun.
Dimensions: 261/4" wide, 15" high, 13t/y"
deep; weight, 35 lbs. ; finishes available and
prices: walnut $139.50; birch unfin. $129.50;
fir, $119.50. Accessories rouxolettc legs $19.95.
Sherwood Electronic Labs, 43110 N. California
Ave., Chicago 18,
Ill.
AUDIO
66
AmericanRadioHistory.Com
AUGUST, 1962
VERSATILE
A SUPERB MONO FM TUNER
FM -1
FM -1 /A
kit -$79.95; semi-kit-$99.95
factory wired -$119.95
A MATCHLESS STEREO TUNER
stereomatic multiplex integrator kit -$29.95; semi kit -$39.95.
FM3 /A factory wired stereomatic multiplex tuner-$169.95
FMX -3
-
A QUALITY FM RECEIVER
FMA-2 insert amplifier kit -$29.95. FM
DVI%1*TLJ
2
11\11
A
factory wired receiver -$169.95
E FI
FMX-3
FMA-2
To the four Dyna attributes
QUALITY
RELIABILITY
SIMPLICITY
ECONOMY
the Dynatuner adds a fifth:
VERSATILITY
It
-
is the Dyna policy always to provide
finer performance, more conextras
servative operation, higher quality corn ponents, easier construction. simpler
operation, and greater economy. Dyna
owners have come to expect these qualities
in every Dynakit. They know that Dyna
specifications are down -to- earth, conservative ratings, easily attained by the kit
builder. They know that each new Dyna
product evidences a quality of thoroughness in design and execution (we call it
"distillation ") not found in the most expensive and elaborate component systems.
The Dynatuner is an excellent example
a completely engineered design.
of the versatility of
Initially designed as a superior quality
mono FM tuner, our designers included
certain basic performance capabilities
which were invaluable bases on which to
build a completely automatic. self-contained multiplex integrator of matchless
performance. Every Dynatuner owner
can now convert his mono tuner into a
STEREOMATIC multiplex Dynatuner
whenever he chooses. No extra space is
required, there are no new knobs to confuse you, and the cost is under $30.
The FMX -3- equipped STEREOMATIC tuner requires no
more effort than tuning a station. Silent, electronic switch-
ing provides either stereo or mono reception automatically, with more than
30 db stereo separation. The presence of a stereo broadcast lights the exclusive STEREOCATOR above the tuning eye. There are no problems with
off- the -air recordings, mono broadcasts come through both low- impedance
outputs at the same level as stereo; the volume control adjusts both channels; construction and alignment are as simple and positive as in the Dynatuner -fully equal to laboratory alignment methods: and the superior Dynatuner performance is retained in stereo.
If you don't need a stereo tuner, the
extra space on the Dynatuner chassis
has another $30 option: a IO watt
insert amplifier of outstanding performance. With only a speaker you have
an ideal FM companion for the bedroom. kitchen, back yard, swimming
pool. Doctor's office, or for a starter
components system for the college
student. You've never heard 10 watts
sound so good before. and this lightweight, compact. rugged unit is a
natural for portable use. yet so versatile
you can always use it as an independent tuner
Don't let the modest cost and deceptively simple appearance fool you;
this is professional -grade equipment
in every sense, and we encourage direct comparison on any basis without
reservation. In addition to easy-tobuild kits, all of this equipment is
also available in factory wired and
tested form, and the tuner and multiplex integrator may also be obtained
as time- saving semi -kits with factory assembled etched circuit boards. In
semi -kit form, only a couple of hours
with
are needed for completion
significant savings.
-still
Write for more complete information on these and other Dynakits.
DYNACO, INC -, 3912 POWELTON AVENUE, PHILADELPHIA 4, PENNSYLVANIA
CABLE ADDRESS
AUDIO
DYNACO
AUGUST, 1962
PHILA
67
AmericanRadioHistory.Com
TANNOY
4.
"GRF" Sidewall Horn -Loaded Enclosure
and Speaker System. The 15" 'Monitor' Dual
Concentric loudspeaker forms the heart of the
system, while the 'GRF' enclosure provides a
eompound expanding sound source, an exelusive feature first introduced in the Autograph enclosure. The effect of this is that the
wave -front area varies with frequency, giving
an outstanding illusion of realism to both
solo and orchestral music. In addition, the
system has all of the well -known advantages
of horn loading, e.g. excellent bass radiation
and transient response, but none of the
special distribution defects associated with
conventional horns of multi- speaker systems.
5.
189.50
WILDER
"Playmate" Speaker System. The
Wilder "Playmate" is a 2 -way speaker system
in a compact enclosure finished on all sides in
furniture-grade veneers.
1
Medallion XII, 12"
1.
3 -way
system,
walnut
$139.95
NH -4 Thin Bookshelf
Specifications: Speakers -f2) 6" l.f., (1)
b.f.: power handling capacity 25 watts ;
input impedance 8 ohms; frequency response from 40 to 18,000 cps. Dimensions
/8" wide. 10" high, 8" deep : weight, 14 lbs.
finishes available and price- walnut $39.75
net. Wilder Rnglneerine. 2013 N. Halsted
4"
:
:
St., Chicago. Ill.
1. ES -81, walnut or blond
UTAH
"Sorcerer."
A
-8"
:
.$79.75 net
hand-
some, compact, good -sounding speaker system.
Specifications: Type of enclosure bass reflex; speakers
l.f., 31,41" h.f.; power handling capacity 12 watts; type of crossover
network capacitor; impedance 8 ohms ; frequency- response from 45 to 17,000 cps ; magnet weights 6.8 oz. h.f., 147 oz.; voice
coil diameters I.f., 1", h.f., 9/16"; other fea-
TAPE
RECORDERS
;
:
:
146.50
The
w /balance controls ; impedance 8 ohms ; frequency response from 20 to 40,000 cps; voice
coil diameters : i.f., 2" ; m.f., 2" ; h.f., 3/4".
Dimensions : 35" wide. 2814" high, 171/2"
deep weight, 98 lbs.; finishes available and
prices: oiled walnut $495.00; University
Loudspeaker, Inc., 80 South Rcusic .\ce.,
White Plains, N. Y.
The low- frequency diaphragm of the 15"
'Monitor' Dual Concentric loudspeaker is rear
horn loaded below 350 cycles, while between
550 and 1,000 cycles per second a new acoustic coupling device gives much improved
front radiation. Above this frequency the non directional horn -loaded high -frequency unit,
which forms an integral part of the Dual
Concentric loudspeaker, takes over, serving
to preserve the impression of location so
necessary to ensure realistic reproduction
of vocal and solo instrumental music.
Specifications: Type of enclosure horn ;
speakers : 15" 'Monitor' Dual Concentric;
power handling capacity : 50 watts ; type of
crossover network : RLC crossover point 1000
cps ; impedance : 16 ohms ; frequency response:
30 to 20,000 cps, ±3 db; efficiency, approx.
8% ; magnet weight : 6% lbs. (dual magnet) ;
voice coil diameters : both 2 ". Dimensions :
231% wide, 42" high, 171,1" deep. Finishes
available and prices : oiled walnut only,
$385.00. Tannoy (America) Ltd., P. O. Box
177 East Norwich, L. I., N. Y.
1. 'Belvedere Senior' bass reflex;
finish oiled walnut
2. 'Belvedere' bass reflex; finish oiled walnut s
3. 'Dalton' infinite baffle; finish oiled walnut *
4. 'Cadet' infinite baffle; finish oiled walnut s
W70 Full range 3- speaker system,
unfinished sanded birch
W7OPR Provincial full range 3speaker system
tures walnut veneer, extremely thin, can
be
wall mounted. Dimensions : 20" wide, 12"
high, 4 15/16" deep ; finishes available and
prices: walnut $49.95. Unfinished $46.95.
Utah Electronics Corp., Huntington, Ind.
WHARFEDALE
Achromatic Full Range 2- Speaker
System and Sand -Filled enclosure. The original Achromatic unit. Though built to the dimensions of a "compact" system, is an integrated full -range speaker system in all respects.
Specifications: Type of enclosure sand filled
ported duct ; speakers 121/1" 1.f., 5" m.f. and
h.f. ; power handling capacity 60 peak
watts; type of crossover network LC 1500
cps crossover; impedance 8 ohms ; magnet
weights : I.f. 152 oz. ; m.f. and h.f. 20 oz.;
11,60
AMPEX
Tape Recorder Player, Model 1260. A portable 4-track stereo and mono recorder player
In attractive grey luggage -with record electronics and playback preamplifiers. It can he
used in a fixed music system. or easily transported for on-the -spot recording or playback
over one or two 2012 portable amplifier speakers. The 1260 is ideal for semi -professional
recording and long -life service in education,
business, theater, church or audio- visual systems.
*all enclosure prices depend upon
speaker installed
UNIVERSITY
Classical .hark II 15^ 3 -Way High -Compliance Speaker System. The Classic Mark II
is the bridge between the giant mono speaker
systems of yesterday and the compact bookshelf types of today. Its remarkable frequency range of from 20 to 40,000 cps is
made possible by the use of University topline components and engineering. A special,
heavy duty 15" high- compliance woofer with
a high energy Uniferrox -7 magnet and thick,
very- rigid diaphragm ; a deluxe 8" high- cornplianee midrange with reserve excursion and
power handling capacity for lowest distortion ;
and the famous Sphericon Super Tweeter for
top end performance. All in a handsome oiled
walnut cabinet compact enough to fit effortlessly into any modern environment.
Specifications: Type of enclosure ducted
port ; speakers -15" l.f., 8" m.f., %" h.f.;
power handling capacity 10 -60 watts ; type
of crossover network 3 -way L/C network
Specifications: Speeds 71/2, 3% fps; heads
%-track ; records 4 track stereo, 4 track
mono ; plays 4 track stereo, 4 track mono
(also half and full track mono) ; reel size 7
in. ; no. of motors 1; timing accuracy U. of a
half tone; freq. reap. 71,11 ips, ±t db from 50
to 15,000 cps ; 3% ips ± t db from 50 to 8000
cps; signal -to -noise ratio 55 db; wow and
flutter, 0.2% at 7% ips (measured by ASA
standards), 0.3% at 3% ips (measured by
ASA standards) ; rewind time, 1200 ft reel,
90 secs. Inputs t microphone, impedance 2.2
megohms, sensitivity 600 mv; 2 high level,
Impedance 250 k ohms, sensitivity 0.25 volts;
amplifier outputs 2, type cathode follower, impedance 250 k or more ohms; Dimensions,
171/1" wide, 91/4" high, 14" deep; weight, 3G
lbs. Other features : 3 separate heads in mumetal cases, micro- milled, die cast frame, auto set shut -off. I'rice 8545.00. Accessories : 2012
t on plifier-Speaker $199.50.
$499.50
1. Model 1250, unmounted tape deck
2
voice coil diameters
:
1.1.
2"
;
m.f. and b.f.
other features sand filled panel to eliminate cabinet resonance, wire wound "c" pad
to balance high frequencies. Dimensions:
24" wide, 141/4" high, 13" deep; weight 50
lbs. ; finishes available and prices : oiled and
polished walnut and polished mahogany
$116.50. Polished fruitwood $134.50. Unfin3/4"
;
ished sanded birch $101.50. Accessories B67
Universal mounting base, finished as above
$9.95. Wharfedale Div., British Industries
Corp., Port Washington, N. Y.
1. W40 Full range 2- speaker system
S 79.50
walnut and mahogany
2. W40 Full range 2- speaker system,
69.50
unfinished sanded birch
3. W70 Full range 3-speaker system,
164.50
walnut and mahogany
.
2.
Model 1270, portable low -level amps
and speakers
AUDIO
68
AmericanRadioHistory.Com
645.00
AUGUST, 1962
The
world's smallest watch, $3000
-
Courtesy of Vacheron 8 Constantin- LeCoultre Watches. Inc.
Swiss precision
MODEL TD -124 TRANSCRIPTION TURNTABLE
-
-
superlaunique in its precision
CRAFTSMANSHIP
tive in its design and style with more built in versatility,
more conveniences and features than any other Turntable
on these the THORENS TD -124 has
available today
built its reputation.
As with the SWISS watchmakers renowned throughout
the world for their precision made parts, some almost
microscopic in size, all to microscopic tolerances. No one
surpasses the SWISS in precision manufacturing.
No one has surpassed the precision crafted THORENS
-
-
Turntables either,
A mere glance
-
beneath the table tells
you why; machined parts, precision balanced, polished to
no mere metal stampings these! The
mirrorlike finishes
drive system offers you the finest features of belt plus idler
no holes
drive, plus a 10 pound table, machine balanced
or slugs are ever used to balance this table!
We invite you to visit a franchised dealer. See the TD -124
and all the family of fine Thorens Turntables...then
make a one minute comparison test with any other turn-
-
table (that's all you'll need) or write us direct.
Guaranteed for One Full Year.
Thorens TD -121 ;85 net
an unexcelled Swiss precision Thorens for those
requiring 331 rpm only
THORENS TD -124
speeds).There's a Thorens
model to fit every purse
and turntable application.
ELPA MARKETING INDUSTRIES, Inc.
...
(convertible to other
-$110
net
BASES from $10 to $35
THORENS DIVISION
ELPA
New Hyde Park, N. Y.
In Canada: Tri-Tel Associates Ltd., Willowdale, Ont.
AUDIO
AUGUST,
69
1962
AmericanRadioHistory.Com
AMPLIFIER CORP.
Stereo- Transflyweight, Series 312-ST. Battery operated. portable, Stereo-Transflyweight,
Series 312 -ST includes several models which
meet NAit standards. ]resigned to meet need
for compact, lightweight professional stereophonic recorders for unrestrieled field use.
Utilizes two clear channels for stereophonic
recordings. Provides independent gain adjustment for each channel. Recordings may he fed
into any dual- channel amplifier for stereophonic loudspeaker playback ; or two channel
stereo -recordings may be "non- stereo" played
on any half-track recorder. Electric- motor.
battery operated operates anywhere from
small dry replaceable or rechargeable batteries. Fully transistorized (20 transistors).
;
Specifications: Speeds /74,, 3%, 7! :2 fps;
heads 3 !ÿ -track ; records 4 track stereo, 4
track mono: plays 4 track stereo and 4 track
mono; reel size 7 in. ; no. of motors I ; timing
accuracy .18 %, freq. resp. 71,4 ips ±2 db from
41, to 16,000 cps; 3% fps ±2 db from 40 to
12.000 cps; signal -lo -noise ratio, 60 dh: wow
and flutter, 0.15% at 7% ips, .23%r at 3% fps;
Inputs 2 microphone impedance 20 k ohms,
sensitivity 3 my ; 2 high level. Impedance 100 k
ohms, sensitivity 3 volts ; amplifier outputs 2.
type hi -level impedance 2.2 k ohms; speaker
outputs 2 impedance 8 ohms: output power 10
watts. Dimensions, 751/2" wide, 11" high, 17^
deep; weight, 43 Its. Price $499.95. Concord
Electronics Corp., 809 N. (' aluenga Blvd., Los
Angeles 38. California.
1.
2.
3.
Concord Model 220
Concord Model 401
Concord Model 550
$169.95
199.95
299.95
CROWN
R\801 Fall Track Record and Play. Direct
off- the -tape third head monitor. "Touch" control with all -electric relay and solenoid opera-
Remote control facilities. Photo -cell
automatic stop in all functions. Three motor
transport, patented differential magnetic
braking, hysteresis capstan motor. forced -air
cooling, straight -line threading. Bias read and
adjust, non -magnetic capstan. Satin anodized
depth -engraved panels. All aluminum construction. Standard rack mount.
Specifications: Speeds 15. 7%, .t
ips ;
heads 3 full track ; records full track mono ;
plays full track mono; reel size 10% in., no. of
motors 3 ; timing accuracy 99.8%; freq. resp.
7% fps. 2 db from 30 to 16.000 cps; 3% ips
3
dh from .10 to 8000 cps; signal -to -noise
ratio, 60 db; wow and flutter. .09 %, at 7%
ips. .18% at 3% ips; rewind time, 1200 ft
Hon.
U_
Specifications: Speeds 15/16, 17/4, 3 %, 7%,
heads 1 full track, I %- track ; records
stereo; plays 2 track stereo, reel size
5 in.; no. of motors 2; freq. resp. 7% ips
+2 (lb from .50 to 10,000 cps; 3% ips, +2 db
from 50 to 7500 cps; signal -to -noise ratio, 55
(lb; wow and flutter. 0,1% at 71,_ fps, 0.15%
at 3% ips; rewind time, 900 ft. reel. 180 secs.
Inputs 2 microphone, impedance 50 /200 ohms.
sensitivity Our- ; amplifier outputs 1, type hiimpedance 15.000 ohms; output 2.5 volts. Dimensions, 151;2" wide, 5
high, 9" deep ;
weight, 11 % lbs.
Other features: 2 built -in 1-lß meters -self
contained. rechargeable batteries. Price $624684. Amplifier Corp. of America, 396 Broadway. New York 13, N. Y. Accessories: 110v
n.c. Power Pack $30.00
1. Transflyweight, Series 312
$438 -529
15 ips ;
2 track
1
2.
3.
4.
Transmagnemite, Series 612
Weatherite Transmagnemite, Series 612
Secret Recorder, Series 212
445 505
reel, 38
pedance
Model T -347 Stereo Tape Transport. This
new version of the popular Bell Stereo tape
transport oilers all the most desirable features
for tape recording and playback. It mounts
anywhere and plays in any position. It has
an Auto-Stop mechanism for convenience.
and a matching stereo preamplifier is included for professional quality playback and
recording.
Specifications: Speeds 71_,. 3% ips; heads
14 track ; records 14 -track stereo. 4 -track
mono ; plays 14-track stereo, 4 -track mono ;
reel size 7 in.: no. of motors .t; timing accuracy ± 2% ; freq, resp. -71,2 fps, +.1 db from
IS to 16,500 cps; 3% ips. ±.1 db from IS to
15,000 cps; signal-to -noise ratio. 50 db; wow
and flutter, 0.2% at 7% fps. 0.2-; at 3 %4 fps;
rewind time, 1200 -ft. reel, 40 sees. Itapllts
microphone, impedance 3 nitwit ms, sensitivity
2.5 Inv : 2 high level, impedance took ohms.
sensitivity 0.1 volts; amplifier outputs --2.
type hi-Z. impedance 20,000 ohms : dimensions: 15,4" wide, 7" high. 13%" deep
weight. 21 lbs. Bell Sound Div.. Thompson
-3
I
playback
3. BX824,
playback
365 -475
475 -535
BELL
Inputs:
microphone, im.50 -250
ohms; amplifier outputs
1, type line. impedance 600 ohms. Dimensions,
19" wide 14" high 7%." deep. weight 4R lbs.
Other features: 17,4 ips (tradable. Price.
$1035.00 Accessories: 30 -watt amplifier,
$107.00. Crown International 1718 \\'est Mishawaka Road, Elkhart. Indiana.
1. BX802, record and play half-track
mono
$945.00
2. BX822, 2 -track stereo record and
secs.
four -track stereo record and
1395.00
1340.00
EICO
RP /100 Stereo 7'ape l,rrordcr Kit. Designed
for professional and home use, the EICO
Mo(lel RI' -100 tape deck has many features
found in the most expensive models. The
RP -100 includes a 14- transistor playback and
record amplifier, electronic push -pull recti-
fier; a hysteresis- synchronous capstan drive
tao tor, and two heavy -duty, four -pole induction motors to drive the reels. Each head
is provided with a four -point professional
mount, and the record and play heads have
laminated mumetal pole pieces, interchannel
mumetal shielding, and mumetal outer shielding. Use of separate record and playback
heads and it na Oilers permit, oaf-the -tape
FERROGRAPH
Model 424 Stereo Tape Recorder. The 424
is an ail -purpose mono and stereo recording
and playback professional quality tape re-
corder. it has dual inputs per channel for
full -depth recording. Output (each track)
1.5v rms max into not less than 100k ohms
(impedance approx. 5000 ohms). Special recording-level meter.
Specifications: Speeds 3% x7% ips: heads
track records 2
full track I % track, 1
track stereo, Y track mono ; plays 1,ÿ or 1,,
track stereo, % or full track mono : reel size
154 in. ; no. of motors 3 ; freq, resp. 7 16_ ips.
+ 3 db from 40 to 15,000 cps; 3% ips. ± .1 db
from 40 to 10,000 cps; signal -to -noise ratio
52 db ; wow and flutter, 0.2Ç nt 7% fps; rewind time, 1200 -ft reel, 40 secs. inputs dual
microphone, impedance 0.5 megohms ; sensitivity 400 Inv; amplifier outputs -2, impedance 5000 ohms; output power 1.5e at
5000 ohms. Dimensions: 18%" wide, 9%4"
high, 17%" deep : weight 45 lbs. Other features: 3 motors, 4 preamps l2 record. 2 playback). each channel may be used separately
without affecting other, automatic stop.
Price. 3595.00. Ercona Corp.. 16 W. 46th St..
-1
144
;
71/2
3.
$595.00
33/4
ips
4A /H mono record 71/2 and 5 ips
and
399.50
425.00
HEATH
4 -Track Stereo Tape Recorder.
The new Ileathkit AD 22 4 -track stereo tape
recorder is easy to assemble and simple to
operate. It contains all the features needed
for fine tape recordings and playback of
stereo and mono tapes. The simplicity of the
precision-machined mechanism and circuithoard construction assures fast. easy assembly and stable circuit performance. Fen
tures push -pull bias /erase oscillator, individual bias adjust and meter calibrate controls.
VU-type meters. record interlock, input mixing controls.
Specifications: Speeds 71:2 and 1% Ips:
heads
1ÿ track : records 1iÿ -track stereo. 4track mono: plays 14 -track stereo, 4 -track
mono ; reel size 7 in.: no. of motors 1; freq.
resp.- 7% fps, ± 3 dh from 40 to 15,000 cps;
3% ips, + 3 db from 40 to 10,000 cps; signal to -noise ratio, 45 db; wow and flutter 0.2% at
7% fps. 0..1 at 31'4 Ips: rewind time, 1200 -ft.
reel, 100 sees. Inputs
microphone. impedance 1 meg. ohm. sensitivity 5 my ; 2 high
level, Impedance 250k ohms. sensitivity 160
my; amplifier outputs -2. type cathode follower. impedance 6000 ohms; output power
I + volt. Dimensions, 12" wide, R" high. 15"
deep : weight. 23 lbs.
Other features: Tam VU-type record -playback meters, digital counter, push -pull biaa/
erase oscillator, circuit board comet. Price,
$179.95. Heath Company, Benton harbor.
Model AD-22
-
-2
;
-2
inc., 6 :125 iluntley lid.,
CONCORD
Concord Mode/ 8,o Stereo Recorder. Feu tures four -track stereo record playback unit
with three separate heads. Ilas three speeds
and separate 7" speaker in lid for best stereo
effect. Complete with 2 dynamic microphones,
stands and necessary connecting cords.
;
New York 36, N. Y.
1. 808 stereo, 33/4 and 71/2 ips
2. 4A /N mono record playback
-2
Ramo Wooldridge,
Columbus, Ohio.
monitoring, and selected sound -on -sound operation without changing connections.
Specifications: Speeds 7%, 3% ips; heads
.11/4- track; records 1,4 -track stereo, 1/4 -track
mono; plays 1/4 -truck stereo. 14 and 1 -track
mono ; reel size 7 in.; no. of motors .1; timing accuracy 0.3% ; freq. resp. 71r. ips. +2
db from 30 to 15,000 cps; 3% fps ±2 db from
30 to 10,000 cps; signal -to -noise ratio, 55 db;
wow and flutter, 0.15 at 7% ips. 0.2% at
rig," ins; rewind time, 1200 ft. reel, 45 secs.
Inputs 2 microphone. impedance 3000 ohms
sensitivity 0.5 mv; 2 high level, impedance
100 k ohms, sensitivity 0.1 volts: amplifier
outputs 2, impedance 5000 ohms. Dimensions.
155/s" wide, 13 5/16" high. 7l,ÿ" deep. Other
features: Studio quality hysteresis-synchronous capstan motor; completely electrical.
pushbutton control of the transport using two
solenoids; automatic end -of-tape stop switch;
no pressure pads and sweep loading achieves
extremely low -tape tension and head wear,
free of tape bounce or slurring on starting;
transistor record and playback electronics (independent) off- the -tape monitor panel selected sound -on- sound. Price $299.95 kit ;
$399.95 wired; Carrying Case, $29.95: Rack
mount, $9.95, Electronic Instrument Co., inc..
3300 Northern Blvd. L.i.C N. Y.
o
'..
1' Ir ta
°'
Mich.
I. AD -12, mechanism only for
70
AUDIO
AmericanRadioHistory.Com
playback.$124.95
AUGUST, 1962
Pardon us while we change our face
Some say that only women are privileged to change their minds, and their faces,
whenever they choose. We disagree. And we have the courage of our convictions,
because -from this day forward -Audiotape will be wearing a bright new face you've
never seen before.
We think you'll like the new Audiotape look, not only because it's fresh, clean and
attractive but because it will now be easier than ever to select the type of Audiotape
you need. We've assigned a distinct, highly visible color to each of the eight types
so that you can locate your favorite immediately. We've also printed a description
of the contentson every package- brief, simple and in large, clear letters. (No matter
which Audiotape you favor, you're getting the tape that quality made famous.)
Look for the new family of Audiotape packages. They're well worth your attention.
AUDIO DEVICES INC., 444 Madison Ave., New York
ollieo!, in Los Angeles, Chicago, Washington. D. C.
AmericanRadioHistory.Com
KNIGHT
KN4310A Stereo Tape Recorder. The Knight
4310A is a versatile stereo and mono tape recorder and playback system integrated into a
single handsome package. Included are two
8 -watt playback amplifiers and two 6 -in.
speakers.
speaker so that the machine can play back
what it has recorded, or prerecorded tapes.
The price is surprisingly low for all of this.
Specifications: Speeds 71/2, 3% fps ; heads
1,4 track ; records, 1/ -track mono; plays
1/4 track
stereo, 1/2-track mono ; reel size 7 in.; freq.
reap. -71/2 ips, from 40 to 15.000 cps ; 3% ips,
from 40 to 9000 cps ; signal -to -noise ratio,
42 db ; wow and flutter, 0.3% at 71/ ips.
Inputs -1 microphone ; 1 high level ; amplifier outputs
speaker outputs 1. Dimensions: 131/" wide, 61/2" high, 10 %" deep;
weight, 22 lbs. Other features: rugged lever
shift for fast rewind, fast forward, play, and
record functions. Price, $89.50 Accessories :
include mie, patch cords and carrying case.
Lafayette Radio Electronics, 111 Jericho Turnpike, Syosset, L. I., N. Y.
1. RK -141, 2 -speed stereo -playback tape
-
-2
puts
microphone, impedance hi or lo by
use of plug -in transformer sensitivity 1/2 mv ;
2 high level, impedance 0.5 meg ohms, sensitivity 29 mv; amplifier output -2, type cathode follower. Dimensions : 18 %" wide, 91/2"
high, 12%" deep ; weight, .f4 lbs. Price,
$569.50. Newcomb Products Co.. 6824 Lexington :1ve., Hollywood 38, Calif.
-3;
$59.50
deck
LUXOR
Specifications: Speeds 71/2, 3 %, 17/, fps;
heads -2 1/2 track ; records 1/2-track stereo, 2track mono ; plays 1/4 and 1/2-track stereo, 3/4
and 1/2-track mono ; reel size 7 in. ; no. of
motors 1; timing accuracy /1/2%; freq. resp.71/2 fps, ± S db from 50 to 15,000 cps ; 3% ips,
± 32 db from 50 to 10,000 cps ; signal -to -noise
ratio, 45 db ; wow and flutter, 0.2% at 71/2 ips,
0.3% at 3 %4 ips ; rewind time, 1200 -ft. reel,
90 secs. Inputs
microphones, impedance 1
meg ohm, sensitivity 1 mv ; 2 high level, impedance 250,000 ohms, sensitivity 5.0 volts;
amplifier outputs -2, type Hi -Z, impedance
250,000 ohms ; speaker outputs 2, impedance
3.2 ohms ; output power 8 watts per channel.
Dimensions: 18" wide, 9%" high, 141/" deep ;
weight, 35 lbs. Price, 8239.95. Allied Radio,
100 N. Western Ave., Chicago, Ill.
-2
Portable Model MP -414 Magnefon. Now
available in a completely portable vinyl -covered steel carrying case, the MP -424 offers the
same high -quality performance of the earlier
NORELCO
Continental "100" Fully Portable Tape Recorder. Completely transistorized and battery
operated, the Norelco Continental "100" Is
the logical extension of the Norelco Continental series of tape recorders. Because it Is
completely self- contained, and weighs only
S pounds, the Continental "100" is ideal for
use in on- the-spot interviews and away -fromthe -office record keeping. Carefully designed.
the "100" operates at such constant speed
that tapes recorded on this machine can be
played on any tape machine with 174-1ps
speed.
MP-410 which is supplied on a wooden
base. All inputs and outputs are accessible
at a terminal board at the front of the
recorder. and both amplifier output and
high -level recorder feed circuits are carried
through the same plug, using four separate
shielded leads. Left and right speaker outputs
are accessible separately, and another pair
of terminals provides left plus right for
center -fill use.
KORTI NG
Model 1585 Professional. Hysteresis motor,
electronic echo chamber and reverb effect,
-
synchronized dubbing-sound with sound
electronic speed change. Fully self- contained
stereo record and playback transistorized input stage for low noise level. Separate volume
controls for recording and playback.
Specifications: Speeds 71/2, 3% fps; heads
31/2 track ; records 4 -track stereo ; plays E and
4 -track stereo, 4 -track mono ; reel size 7 in.;
no. of motors 1; freq. resp. 71/2 Ips, ± S db
from 30 to 20,000 cps ; 3% ips. ± 3 db from 40
to 15,000 cps ; signal -to -noise ratio, 50 db;
wow and flutter, 0.2% at 7% ips, 0.2% at 3%
ips ; rewind time, 1200 -ft. reel 120 secs. Inputs
microphone, impedance 200 ohms, sensitivity 0.07 mv ; 2 high level, sensitivity 0.1
volts ; amplifier outputs-2, type Cath. foil.;
speaker output impedance 4 ohms ; output
power 3.5 watts, Dimensions : 16%" wide, 13"
high, 7%" deep ; weight, 29 lbs. Other features: All conections for use as deck ; automatic tape stop ; digital tape counter ; lock
pause for cueing and editing. Price, $369.50
with two mikes. Korting Recorder Sales
Corp., 346 R. 44th St., New York, N. Y.
1. 114, prof. Deck, inca patch cords
$279.50
-2
2. 1385, self- contained stereo record and
play
279.50
3. 136, "Broadcaster" mono recorder
219.50
4 2243, 4 -track mono record, stereo play 239.50
LAFAYETTE
RK -137 2 -Speed Tape Recorder. A two speed tape recorder which will record mono
and play back stereo as well as mono. In
addition It has built -in audio amplifier and
Specifications: Speeds 17,4 ips ; heads-1/2
track ; records % -track mono ; plays % -track
mono ; reel size 4" max ; no. of motors 1;
Specifications: Speeds 71/2, 3 %, 1% ips;
1,4 track ; records 1,4 -track stereo, 4heads
track mono ; plays 1/2-track stereo, 4 -track
mono ; reel size 7 in. ; no. of motors 1; freq.
resp.-7% ips, t 2 db from 30 to 18,000 cps ;
3% Ips, ± 3 db from 40 to 12,000 cps ; 17,4 ips,
± 4 db from 50 to 8000 cps ; signal -to -noise
ratio, 49 db ; wow and flutter, 0.15% at 7%
Ips, 0.20% at 3% ips ; rewind time, 1200 -ft.
microphone, impedreel, 120 secs. Inputs
ance 1 megohm, sensitivity 3 mv ; 2 high
level, impedance 1 megohm, sensitivity 0.4
volts ; amplifier outputs -2, impedance 56k
ohms ; speakers, 2 ; speaker outputs 3, (L, R,
and L + R) impedance 4 ohms ; output power
2 x 2
watts. Dimensions, 14 3/16" wide
11 7/16" high, 47/e" deep ; weight, 29 lbs.
Other features tone control switch, speaker
switch (int, ext, both), two electron eye tubes
for level indication. Price, $319.00. AmeLux
Electronics Corporation, 60 E. 42nd St.,
-2
-2
:
New York 17, N. Y.
1. MP410A Magnefon, walnut base
2. Magnefon deck
freq. resp. 1% fps, ± 3 db from 100 to 6000
cps; signal-to -noise ratio 40 db ; wow and
flutter, 0.5% at 17/s ips ; rewind time, 300 -ft.
reel, 100 secs. Inputs
microphone, impedance 500 ohms, sensitivity 0.3 mv ; 1 high
level, impedance 1 meg ohms, sensitivity 1
volt ; amplifier outputs
at 1v., impedance 1000 ohms ; speaker outputs 1, impedance 3 ohms ; output power 250 mw. Dimensions: 10%" wide, 7%" high, 3%" deep;
weight, 8 lbs. Price, $129.50. Accessories:
carrying case $9.95. North American Philips
Co., High Fidelity Prod. Division, 230 Duffy
Ave., Hicksville, L. I., N. Y.
I. A.c. power supply, EL3766/54
$24.95
-1
-1
ROBERTS
-hack Stereo Tape Recorder.
A high -quality stereo tape recorder with
built -In provisions for most stereo recording
Model 990
4
needs.
Specifications: Speeds 374, 71/2, 15 fps;
14 track ; records 1/4 -track stereo
heads
-2
$289.00
234.00
NEWCOMB
1/4 -Track Tape Recorder. The 1/2-track Model SM-310 -4B as well
as the earlier % -track Model SM -310, is "cybernetically engineered for intuitive operation." Control of the tape transport is centered In a 'joy stick" which is sensibly
moved to the left to rewind, to the right for
fast forward, and toward the operator for record and play modes. Both models will operate either vertically or horizontally and
take from 3" to 101/2" reels, as well as NAB
hubs.
Specifications: Speeds 3 %, 71/2 Ips ; heads
records 1/2-track stereo. 1/2-track
1/4- track;
mono ; plays % or 1/2-track stereo or mono ;
reel size 101/2" ; no. of motors 1; timing accuracy %%; freq. resp. 75 Ips, ± 2 db from
30 to 15,000 cps ; 3% fps, ±3 db from 40 to
10,000 cps ; signal -to -noise ratio. 50 db ; wow
and flutter, 0.2% at 7% ips, 0.25% at 3%
ips; rewind time, 3600 -ft. reel, 120 secs. In-
Model SM- 310 -45 Stereo
-
AUDIO
72
AmericanRadioHistory.Com
AUGUST, 1962
SEE EVERYTHING IN
STEREO HI -FI and RECORDING
including Exclusive New Transistorized Equipment
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100
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W.TMM Y.
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WORLD'S LARGEST
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values anywhere.
NEWEST
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Knight -Kitsz
Fastest -growing value
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components and systems are equal to the
very best in quality and
Build your own -build
the best at big savings.
Its easy, it's enjoyable
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KNIGHT -KIT stereo
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mono; plays % -track stereo, 1/4 -track
mono; reel size 7 In. ; no. of motors 1 ; tinting
accuracy 0.2% ; freq. resp.-7'4 fps, ± 2 db
from 40 to 15k cps; 3% ips, ±J db from 40
to 12k cps; wow and flutter, 0.12% at 714
Ips, 0.2% at 3% tips ; rewind time, 1200 -ft.
reel, 90 secs. Inputs 2 microphone, impedance
500k ohms, sensitivity 1.2 Inv ; 2 high level,
impedance 1 meg ohm, sensitivity 0.120 volts;
amplifier outputs -2, type cathode follower,
impedance 101e ohms; speaker outputs 2, impedance 8 ohms; output power 6 watts. Dimensions, /4" wide, 21" high, 91/4" deep;
weight, 47 lbs. Price, 5399.50 Roberts Electronics, Inc., 829 N. Highland Ave., Los
Angeles, Calif.
'A -track
SCULLY
Model 270 Long -Play Professional Tape Reproducer. A professional machine for use
with well -known Scully record -cutting lathe.
Specifications: Speeds 3% -7% or 71/2 -15
4.1 lbs. Other features Includes
remote control; all -transistorized electronics.
Price, $595.00. Accessories : AS-777 -10 watt
speaker /amplifier combination $175.00 each.
Superscope Inc., 8150 Vineland Ave., Sun
Valley, Calif.
deep ; weight,
:
TANDBERG
t -.''pt rd ; -Trask Stereo Record l'layback Deck. The Model 6 -44 features a
hysteresis- synchronous motor drive, tntcroswitch, automatic cut -off, easy tape threading position, superb recording and playback
frequency response at all three speeds;
separate FM- multiplex input to eliminate any
beep tones. It is pushbutton operated, with
built -in solenoid for remote control. Furnished
in an attractive teak cabinet.
Model
6-44
:
or full ips; plays 1/4 or 1/4 -track stereo,
track mono ; reel size 14 in. ; no. of motors 3;
timing accuracy 99.8% ; freq. reap. -714 ips
+11/2 db front 50 to 15,000 cps; signal -tonoise ratio, 60 db; wow and flutter, 0.1%
at 71,x. fps, 0.2% at 3% ips; rewind time.
4800-ft. reel. 105 secs. amplifier outputs
type solid -state plug -in, impedance 600 ohms;
dimensions : 19" wide, 24" high, 8%" deep;
weight, 79 lbs. Other features : disc brakes,
5 -year amplifier guarantee. 1 year unit guarantee mono. Price, $1395.00 mono; $1530.00
stereo. Scully Recording Inst. Co., 280 Bunnell St., Bridgeport, Conn.
1
F
-
VIKING
86 Stereo- Compact. Available with several
SONY
Sterccorder (777 8-2 á 777 S -4).
The 777 S -2 is a 2 -track stereo /mono recorder
with 2 and 4 -track playback ; the 777 S-4 is
a 4 -track stereo -mono recorder with 2 and
4 -track playback. An advanced achievement
in recorded engineering, the new all- transistorized professional Sony 777 Sterecorder
series features the exclusive and patented
Sony Electro Bi- Lateral 2- and 4 -track playback head permitting the playback of 2 -track
and 4 -track stereo or monophonic tapes witlr
out track -width compromise -through the
same head. Other features include individual
erase/record /playback heads, professional :i"
VII meters, automatic shut -of, an all -solenoid
feather -touch -operated mechanism, electrical
speed change, hysteresis- synchronous drive
motor and two high torque spooling motors.
electronics on easily removable plug -in cards.
Constant- tape -tension system allows use of
thin -base, double- length tapes, without tape
deformation. Start -stop action so fast it can
cleanly split syllables. Wow and flutter exceptionally low (see specs).
Pushbutton, relay, and solenoid operation
(actuate button is illuminated). Top -loading
heads with wide access for cleaning, editing.
Simplified servicing and interchangeability of
many parts to minimize spare parts inventory.
Small physical size. Rack mounting style or
in portable case.
Specifications: Speeds, 7% and 3% ips
(other 2:1 ratio speed combinations on special
order) ; heads: three 2 -truck heads ; reel size :
8 in.; no. of motors : 3; tape speed accuracy :
0.03-0.6%; freq. resp. : 71/2 Ws, ± 1 db
from 50 to 18,000 cps; :1% fps, ± 2 db from
63 to 10.000 cps ; signal -to -noise ratio, 55 db ;
wow and flutter 0.09% rams at 714 ips, 0.11%
erns at ::yt ips; rewind time, 1200 ft. reel 40
High -Z dynamic, or crystal
secs. Inputs
microphone (50 /450 ohm microphone with
plug -in ¢mfr. access.), bad. /unbal. line bridge
(100 k), - 10 db, min. Outputs : Bal./unbal.
600 ohm, 4 db., monitor jacks for crystal
phones). Dimensions (in case), 20" wide, 15"
high, 14" deep; weight, 61 lbs. Price : $1675
without case, $1718 with case. Vega Electronics Corp., 1078 N. Highway, Cupertino,
Calif.
.Model 777
Specifications: Speeds 1$%, 3%, 7% ips;
1/4- track; records 4-track stereo, 4heads
track mono ; plays 2 and 4 -track stereo, P,
and 4 -track mono ; reel size 7 in. ; no. of
motors 1; timing accuracy ± 1 % ; freq. reap.71, ips, * 2 db from 30 to 16,000 cps ; 3%
ips, ± 8 db from 40 to 11,000 cps ; signal -tonoise ratio, 55 db ; wow and flutter, 0.1% at
714 ips, 0.15% at 3% ips ; rewind time, 1200 microphone, imft. reel, 60 secs. Inputs
pedance 10.000 ohms. sensitivity 5 ntv ; high
ohms,
sensitivity 0.05
level impedance 10,000
volts ; amplifier outputs -1.5v ; speaker outputs 2. Dimensions: 12" wide. 6" high, 16"
deep ; weight, 25 1hs. Price, $405.00. Accessories ; TC56 carrying case, $24.50, DP4II dynamic mie, $49.50. Tandberg of America, Inc.,
4 Third Ave., Pelham, N. Y.
1.
Model 8 series. 2 -speed mono $219.50- 287.50
-3
head configurations, the Model RMQ is the
quarter -track version containing 3 separate
heads: one each for recording, playback, and
erase. The deck is essentially the well known Viking 85 with new electronics, functions, and heads.
Specifications Speeds: 3%, 71% ips; heads
31/4 track ; records 1/4 -track stereo, 1/4 -track
mono ; plays 14 or 14-track stereo, 1/4 or %track mono ; reel size 7 in. ; no. of motors 1;
timing accuracy 0.5% ; freq. resp. -714 ips,
-
-2
2.
Model 7 series,
3
-speed stereo
UHER
Report" Portable Tape Recorder. The Cher "4000 Report" combines the
recording quality of fine n.c.- powered recorders with the compactness and portability of
battery-operated equipment. it works anywhere and in any position. Its all -metal housing contains a novel drive system and advanced electronics. Its four constant tape
speeds offer choices ranging from maximum
tonal fidelity to maximum recording time. Use
the "4000 Report" for exceptionally fine recordings of live music or record up to 8%
hours on a 5" reel at the super slow speed of
15/16 ips.
Specifications: Speeds 714, 3%, 17,4, 15/16
ips ; heads
14 -track ; records 14 -track mono ;
plays 14 -track mono ; reel size 5 in. ; no.
of motors 1; timing accuracy 99.8% ; freq.
resp. -71./.2 fps, + 2 db from 50 to 22,000
cps; :% ips, ± 2 db from 50 to 18,000
cps ; signal -to -noise ratio, 50 db; wow and
flutter, 0.15% at 7% fps, 0.2% at 3% fps. Inmicrophone, impedance 1k ohms, senputs
sitivity 0.1 my ; amplifier outputs -2, impedance 15k ohms ; speaker outputs 1, impedance 4 ohms ; output power 1 watt. Dimensions: 10%" wide, 3%" high, 8%" deep;
weight, 7 lbs. Martel Electronics, 7400 Melrose
Ave., Los Angeles 48, Calif.
.Model "4000
-2
Specifications: Speeds 7% and 3% ips;
14 track, 1 1/4 track ; records 2- or 4heads
track stereo. 2 or 4 -track mono ; plays 2 and
4 -track stereo, 2 and 4 -track mono ; reel size
7 in. ; no. of motors 3 ; freq. resp. -714 fps, ±
ips, ± 2 db
db from 40 to 15,000 cps ; 3'
from 40 to 8000 cps; signal -to -noise ratio,
50 db ; wow and flutter. 0.15% at 714 ips,
0.2% at 3i ips ; rewind time, 1200 -ft. reel,
microphone, impedance
60 secs. Inputs
250 ohms balanced, sensitivity - 60 db ; - 10
db high level, impedance 100 ohms ; amplifier
outputs-2, type preamp. impedance 600 and
hi -Z ; dimensions : 16" wide, 17%" high, 9"
-1
-2
AUDIO
,t db from 25 to 18,000 cps; 3% ips, ± 3 db
from 25 to 12,000 cps ; signal -to -noise ratio. 55
db; wow and flutter, 0.2% at 7% ips ; rewind
microtime, 1200-ft. reel, 90 secs. Inputs
phone, impedance i meg. ohm, sensitivity
I my ; 2 high level, impedance 180k ohms.
sensitivity 0.1 volts; amplifier outputs -2,
1 volt, impedance 45k ohms ; monitor outputs
2, impedance 4500 ohms. Dimensions : 13"
wide, 13" high, 61/4" deep; weight, 22 lbs.
Price, $299.50. Viking of Minneapolis, 9600
Aldrich Ave., So. Minneapolis, Minn.
$199.50
1. 76 compact, 1/4 -track rec and play
+
-2
2. 76 deck, model HQ
3. 86 super Pro RMQ
4. 86 deck, model RMQ
114.00
394.00
179.50
-I
VEGA
Model V -30 Transistorized Professional
Magnetic Tape Recorder-Reproducer. Completely transistorized, with the solid -state
AUGUST, 1962
MICROPHONES
AKG
Miniature Transistorized Condenser
Microphone Spstem. A professional condenser
microphone system in an extremely small
package.
C -60
75
AmericanRadioHistory.Com
Specifications: Type condenser; dir. pattern
cardioid omni; diaphragm material My lar and
Gold ; case anodized metal; finish satin ; output Impedance 50/200/500 ohms ; freq. resp.
±2.5 db from 30 to 20,000 cps ; sensitivity 1.3
my /microbar ; cable connection Preh ; length
of cable furnished 15 ft.; type of plug Customer; dimensions micr. 1" dia. by 4 ", power
unit 4" x 3" x e- ; weight micr. 2 oz.-power
unit, 1 lb; type of mounting socket /suspension /gooseneck option other features : studio
quality in a portable condenser mike system
mw /10 dynes /cm' (50 ohms)
; length of cable
furnished 25 ft. ; dimensions 71/2" long, 11"
dia.; weight 11 oz.; available in any required
impedance. Price, $195.00 ; with on /off switch,
$199.75. American Microphone Mfg. Co.,
:
Ghlion, Ohio.
1. D55 cardioid dynamic, lo, med, hi -Z.$ 89.50
2. D22 omnidirectional dynamic, lo, med,
hi -Z
99.50
3. D33 dynamic, 50 or 250 ohms Z
130.00
;
featuring rechargeable cells. Price 8259.50.
Accessories : a.c. power supply, fishpole, windscreen. Electronic Applications. 94 Richmond
Hill Ave., Stamford, Conn.
1.
AKG D -19U, dynamic cardioid
multi-Z outputs
D-24B, dynamic professional
cardioid, 60 or 200 ohms
3. AKG D -58, dynamic differential close
talk, 290 ohms
4. AKG Dyn 200, studio dynamic omni
$ 58.00
2. AKG
60 and 200 ohms
5. AKG C -12A professional condenser,
remote switching 50 or 200 ohms
165.00
42.00
110.00
585.00
ALTEC
Polyester Film Microphone. One of is new
line of modestly priced professional -quality
microphones, the Altec model 6S3A features a
polyester film diaphragm and a sintered bronze
filter. The use of polyester film as the diaphragm material, instead of aluminum, greatly
increases the ruggedness of the diaphragm
BEYER
M -160 Double -ribbon Cardioid Microphone.
This unit is the smallest ribbon microphone
of broadcast quality that has been marketed
in some time. It is highly cardioid patterned
as a result of construction featuring two ribbons, one behind the other.
Specifications: Type ribbon dynamic ; dir
pattern cardioid ; diaphragm material aluminum; case brass; finish sanded chrome; output impedance 50/200 ohms ; freq. resp. ± 3 db
from 50 to 20,000 cps ; sensitivity .07 my /bar ;
cable connection 6 -pole Tuchei male; length
of cable furnished 15 ft. ; type of plug mating
for above, tinned other end ; dimensions 1.5" x
6" ; weight 5.5 ozs ; type of mounting swivel
stand coupling ; other features : jewelers' case.
Price, $195.00. Gotham Audio Corp., 2 West
46th St.. New York, N.Y.
1. M -130 Ribbon -same as above but
.
figure 8 pattern
2. M -100 Dynamic -Similar to above
omni -directional
AMERICAN
tailored to your
assembled in our
to finish. Finest
careful attention
response requirements, and
engineering Lab from start
workmanship and the most
to detail are guaranteed.
DYNACO
. r.
', Microphone. Dual ribbon
professional -quality mike which features quick
conversion to mono microphone by unplugging
the top ribbon housing. Features the ideal
stereo point pickup which is necessary for
compatible mono- stereo multiplex broadcasts.
Included are a phasing switch for the two
ribbons, and a Talk-Music-off switch. (Talk is
for a rolled off low end for close mike speech.)
Specifications: Type ribbon; dir. pattern
figure 8; diaphragm material aluminum; case
steel ; finish aluminum: output impedance 200
ohms ; freq. resp. 2 db from 30 to 13,000 cps ;
sensitivity GM -156 db ; cable connection 5 -pin
single connection supplied length of cable fur.
nished 20 ft. ; type of plug open end ; dimensions -10 a,G" x 1 13/16" ; weight 1 lb ; type of
mounting std. % x 27 thread in quick- disconnect clip; other features: adjustable separation by rotation of the top ribbon with respect
to the bottom ribbon. Price 3149.95 Accessories
31T-2 dual 200 or Hi -Z transformer $24.95.
Dynaco Inc., 3912 Powelton Ave., Philadelphia, I'a.
BÇO 200
B&0 50, mono ribbon mike 50 ohm
impedance
$ 49.95
2. 860 53, mono ribbon mike 50/250/
Hi -Z
59.95
3. SS -1, stereo spacer for 2 B&O mono
mikes
14.95
1.
ELECTRO -VOICE
Electro-l-uice .Model 6.;.; Gcncral Purpose
Omnidirectional 3icrophone. Modern two
tone design dynamic microphone. High output
level, wide -range response. For public address,
hume recording, communications, electronic
teaching aids, paging systems. Integral on -off
switch.
specifications: Type dynamic ; dir. pattern
omnidirectional ; die cast zinc case ; finish
chrome plate; output impedance hi -z or bal
150 ohms ; freq. resp. from 70 to 10,000 cps ;
Sensitivity - 57 db ; length of cable furnished
ft. ; weight 1 lb. ; type of mounting % " -27
-
Specifications: Type, dynamic; dir. pattern
cardioid ; diaphragm material, Mylar ; finish,
satin black or Roman gold ; freq. resp. from
40 to 18,000 cps ; sensitivity, - 60 db re I
LAFAYETTE
PA -263 Dynamic Stereo Microphone. Fea-
N. Y.
Model 1176 Cardioid Dynamic Microphone.
The new D76, with improved Mylar diaphragm, is a professional high- quality version
of the D55. Each microphone is a custom job
630, high output omni dynamic
615, home recording omni dynamic
165.00
professional microphone for use in recording
applications.
Specifications: Type condenser ; dlr. pattern
omni -directional diaphragm material titanium ; case aluminum ; finish black ; output
impedance high; freq, resp. 3 db from 20 to
15,000 cps ; sensitivity .55 my /bar ; cable connection Amphenol 79 -08M ; length of cable
furnished 20 ft.; weight 8 oz. Price $190.00.
Capps Co., 20 Addison Place, Valley Stream.
Specifications: Type dynamic ; dir. pattern
cardioid; diaphragm material polyester film;
case metal; finish various ; output impedance
30/50, 150/250,20k ohms ; freq. resp. from 45
to 15,000 cps ; length of cable furnished 15
ft. ; weight 11 oz. ; type of mounting % "-27
thread mic stand. l'rice, $72.00 Altec Lansing
Corp., 1515 S. Manchester Ave., Anaheim,
Calif.
4.
5.
72.50
82.50
52.50
25.50
$165.00
CAPPS
and water.
2. 636, omni dynamic
3. 647A, lavalier moni dynamic
but
Capps Condenser Microphone CM 2001. A
thus taking it out of the delicate, easily damaged category. The sintered bronze filter placed
in front of the diaphragm protects it from
foreign particles such as ferrous filings. dust,
stand connector. Price, $35.00. Electro- Voice,
Inc., Buchanan, Michigan.
1. 634, omni dynamic
$31.50
turing two microphone elements in a single
case, with their axes at right angles to each
other, the PA -263 will record excellent stereo
even for the non -professional. Because of the
disposition of the elements, just the right
amount of reverberation will be recorded.
Specifications: Type stereo dynamic; dir.
pattern (2) omni, 90° apart ; case metal ;
finish satin chrome; output impedance 50 k
ohms ; freq. resp. from 50 to 15,000 cps ;
weight 6 lbs ; type of mounting gland type
swivel joint ; other features : switch for either
mono or stereo operation. Price, $17.95. Lafayette Rudio Electronics. 111 Jericho Turnpike, Syosset, L. I., N. Y.
1. PA -49, studio dynamic
$11.95
2. PA -29, slim dynamic
9.95
3. PA -46, dual impedance slim dynamic . 11.95
NEUMANN
('oule er Microphone. This
newest in the line of Neumann Condenser
Studio Microphones was especially designed
to be a studio recording microphone adaptable
to numerous different situations and, particularly, close microphone pickups. Its Voice Music switch and overload protection switch
make it ideally suitable to multiple mike techniques. It uses an EF -86 tube readily replaced
by the user. The Model M -269 is identical to
the U-67 except that it offers the possibility
of remote controlling any of the three main
patterns and an infinite resolution between
.110,1(1
t.
-67
patterns.
Specifications: Type condenser dlr. pattern
omni, cardioid, figure-8, diaphragm material
Mylar; case brass finish sanded chrome
output impedance 50/200 ohms freq. resp.
± I db from 8 to 20,000 cps ; sensitivity 2.2
;
;
my /bar ; cable connection 7 -pole male Tuchel;
length of cable furnished 25 ft. ; type of plug
Cannon XLR 3 -32 on output of NU-67 Power
Supply; dimensions 7W' x 2t/.s" ; weight 1 lb ;
type of mounting swivel stand or elastic suspension; other features : Voice-Music switch;
Overload Protection switch. Price, $435.00.
Accessories : Full Elastic Suspension Z-48,
$32.50, Wind and Close Talking Guard Z -67,
$32.50. Gotham Audio Corp., 2 West 46th St.,
New York 36, N.Y.
1. M -269, condenser mic
$495.00
2. SM -2, double -stereo M -S mic, remote
controlled
AmericanRadioHistory.Com
795.00
3. KM -56, miniature, 3- pattern condenser
mic
435.00
4. KM -54a, miniature, cardioid condenser
mic
435.00
5. M -49b, remote -controlled pattern studio mic
495.00
(Continved on pa(lr
AUDIO
76
;
;
9.1!)
AUGUST, 1962
GOOD
1T
g, HEADS
PREFER
TARZIAN TAPE
ITEM
Standard Play
1.5 Mil
Acetate Tape
Reel
Size
3"
5"
7"
Reel
Hub
Long Play
1.0 Mil
Acetate Tape
3"
5"
7"
Reel
Hub
Long Play
1.0 Mil
Mylar Tape
3"
5"
7"
Reel
Hub
Empty Reels
and Boxes
Length
Code
(Feet)
Number
1%
Approximate Recording Time
I.P.S.
3% I.P.S.
7% I.P.S.
150
1131 -01
30 mins.
600
1200
2400
2400
1131 -06
hrs.
4 hrs.
8 hrs.
8 hrs.
1131 -12
1131 -24R
1131 -24H
2
1121 -02
48 mins.
1121 -09
1121 -36H
hrs.
6 hrs.
12 hrs.
12 hrs.
225
1321 -02
48 mins.
900
1800
3600
3600
1321 -09
hrs.
6 hrs.
12 hrs.
12 hrs.
225
900
1800
3600
3600
1121 -18
1121 -36R
1321 -18
1321 -36R
1321 -36H
3"
5"
7"
1131-12RM6
Package
3
15
1
2
4
4
24 mins.
1% hrs.
3
6
6
3
mins.
hr.
hrs.
hrs.
hrs.
hrs.
hrs.
hrs.
24 mins.
1% hrs.
3 hrs.
6
6
7% mins.
30 mins.
1
2
2
12
hr.
hrs.
hrs.
mins.
45 mins.
1% hrs.
3
3
12
hrs.
hrs.
mins.
45 mins.
1% hrs.
hrs.
hrs.
3
3
hrs.
hrs.
NOTE: These figures are for monaural 2- track,
and stereophonic 4 -track recording. Divide by y,,
to find recording time for single-track monaural
and two -track stereophonic systems. I.P.S. Indicates speed of tape past recording head In
inches per second.
Typical Tape Applications ...
Engineered for Highest Fidelity
Sarkes Tarzian, Inc., a leading manufacturer in the electronics and communications industry, guarantees that every reel of Tarzian Tape is manufactured to identical professional
quality standards. Three types of Tarzian Tape satisfy virtually every recording requirement:
Standard Play 1.5 mil acetate, Long Play 1.0 mil acetate, and Long Play 1.0 mil Mylar". The
I mil tapes give 50% more recording time on the same size reel.
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Recording TV, AM and FM radio programs
Taping valuable records, both old 78's and
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Recording family events, such as weddings,
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Taped letters -to family, friends, business
and club acquaintances
Practicing speeches, language, shorthand,
music, many other learning activities
Recording "live" concerts, lectures, party
activities, theatrical events, special sound
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Adding sound to home movies and slide
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*DuPont trademark for its polyester film
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AUDIO
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World's Leading Manufacturers of TV and FM tuners Closed Circuit TV Systems Broadcast
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MAGNETIC TAPE DIVISION BLOOMINGTON, INDIANA
Eroar!: Ad Aariema, Inc.,
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In Canada, Cross Canada Electronics, Waist-too, Ont.
77
AUGUST, 1962
AmericanRadioHistory.Com
RECORD REVUE
Edward Tatnall Canby *
Berlioz: Symphonie Fantastique. Orch
des Concerts Lamoureux, Markevitch.
Deutsche Gramm. 138712 stereo
Of all the recent versions of this French
war horse, this Is surely the outstanding
recording. For my taste, and for my hi -fl
ear too, no other approaches it. Where so
many performers are somehow perfunctory
-the same old music. so tired and outdated -this one is alive like a first performance. (Well, maybe a tenth performance ; the first is usually pretty bad!)
And the recording is as startling In its
realness as the performance.
Markevitch, though Russian born, was
educated in Paris, another of the many
students of the famed Nadia Boulanger,
and thus has a thoroughly French background, heightened -as with so many of
the Franco-Russians -by his Russian style fire of temperment. He was one of
the last protogés of the great Diaghilev of
ballet fame, following upon such as Stravinsky.
STRAVINSKY
IS
EIGHTY
Stravinsky: Dumbarton Oaks; Danses
Concertantes; Concerto in D for Strings.
English Chamber Orch., Davis.
L'Oiseau -Lyre SOL 60050 stereo
Stravinsky: Concerto for Strings in D;
Concerto in E Flat "Dumbarton Oaks ".
Bartok: Divertimento for Strings. Zurich
Chamber Orch., de Stoutz.
Vanguard VSD 2112 stereo
I'm glad Stravinsky is eighty. His anniversary has started a flood of earlier Stravinsky
on its way back where it ought to be, and
in particular the mass of "middle period"
Stravinsky that for so many years was
thought of as the ultimate in dry, tasteless
modernity by people who loved the "Fire
Bird" music and maybe "Petrouchka."
Here are two excellent recordings of two
such works and one of a third, with a complementary Bartok thrown in. I use to know
these pieces after a fashion ; I heard "Dumbarton Oaks" performed in 1942, only four
years after its composition -and the place
was Dumbarton Oaks in Washington, where it
had first been heard. Gorgeous spot, the concert outdoors amid gardens and trees. The
other works, too, I knew and I felt that maybe
someday I'd understand them.
Now
find them absolutely lovely, and
wonderfully nostalgic, for times gone by !
Music has moved so far, so fast, since then.
Tape music. Serial music, Zen, set for pianos
with broken bottles, hammers, pieces of
colored string. Geometrical, mathematical
computer music. The latest Stravinsky
-I
-
which now borrows from them all. Phew
The mid- period Stravinsky, you see, had
lost the brittle, self- conclous show-off sound
of the noisy Twenties, softened down the
raucousness, tempered the brass and even the
plano to quieter tones-yet the new, jazzy
tempo is wholly of the time, seemingly full of
Indignity yet
we now can hear-actually
of great dignity and expressiveness.
Can you hear this? I think so, for two
!
-as
reasons. First is that, today, the performances
themselves are easy- going, familiar, intelligible. The musicians "speak the language"
and can communicate it to you. Secondly, we
-all of us-have moved ahead. Our ears
are automatically conditioned to hear this
music as already "old ". It is a style that is
absolutely gone forever now. And it should
bring back its own period to all who are
old enough to have lived then. Youngsters will
enjoy it, of course, with fresh ears that hear
it as really antique Say, like Rachmaninoff
or Tchaikowsky when we were young.
These two recordings? Both excellent. The
Zurich group Is more Intimate, the sound less
expansive but the music played with a fine
smoothness and accuracy. The British group
sounds bigger, is somewhat more flamboyant.
You could almost choose by the differing
contents- Bartok or more Stravinsky.
!
Stravinsky: Concerto for Two Solo Pianos
(1935); Sonata for Two Pianos (1944 5);
Eight Easy Pieces (1915). Gold and FizColumbia MS 6333 stereo
dale.
Here is Stravinsky for four hands -on one
piano for the eight snazzy little pieces from
the 'teens, on two grands for the more pro tentlous and longer big works.
The Concerto, like Bach's "Italian Concerto" for harpsichord solo, achieves the sound
and dimension of an orchestral work within
the framework of four -hand piano tone. The
Sonata is a more intimate work, not at all
orchestral. An interesting study in careful
styling, these pieces.
Middle- period Stravinsky on the piano at
first sounds harsher than similar music for
orchestra, and these pianists are not of the
Romantic sort either. It seems to me that
they exaggerate the percussive, steely qualities
in the music, miss some of Its really lyric,
contemplative effects. They are of the hard touch school of their pianistic generation
(now replaced by "soft" and Romantic playing among the young) and so we should take
this in our stride -for they do a technically
expert job except for a few nervous places in
the tougher fast parts.
You'll find the eight "Easy Pieces," at one
piano, absolutely delightful -the nose- thumbing spoofiness that was so popular in France
in the pre-War I days, and on through the
Twenties. The Concerto is a big, serious
piece out of the Great Depression, when music
everywhere turned away from the brittle
noisiness of the twenties. Europe as well as
the U.S.A. The Sonata is a really lovely
miniature, very "classical" à la Mozart, with
ingratiatingly gentle rhythms and tune -fragments of the sweetest sort.
listeners In the New York area. with considerable impact.
Musically, my reaction Is slightly chilly.
All the notes are there and with a vengeance,
hard, precise, glittering. But the glassy- chrome
styling is not good for Mozart, Schubert nor
even Mendelssohn. Darned little "poetry" in
this playing, by which I guess I mean, not
enough phrasing, emotional contrast, contrast of harmony and key, of tension and relaxation. Complaints on a relatively high
plane, to be sure-these players really play
and Command really records.
Schubert: Grand Duo for Piano Four
Hands, Op. 140. Gold and Fizdale.
Columbia MS 6317 stereo
Gold and Fizdale's twenty fingers added to
the twenty shared by another team, Hambro
and Zayde, sum up in forty steel- springed,
trigger- action mechanisms a generation of
pianists, those who were the "young" pianists
just before the war and just after. It was the
time of the hardened touch, the high -tension,
teeth -gritting, percussive technique, enormously accurate, cat -like, and never by any
chance sentimental. This was the great reaction to an older and sentimental generation
-the long -hairs who kept their hair on their
head and, in a few remaining living examples,
still do. These youngsters were marvelous
pianists-of their sort. They still are.
But now they are sandwiched in the middle
of a strange juxtaposition. The young of today have gone all Romantic, soft, delicate,
swooning right and left. The oldsters are
still out of the echt- Romantic period tracing
directly back to Liszt, Brahms. Thus the
hard -touch pianists are cut off on both sides,
and tend to sound increasingly metallic as
their "style" loses ground.
So it is, here. This lovely, poetic big Schubert piece just doesn't come off right as
played by these men. Not for my ears, anyhow.
Two deadpan, too accurate in a literal sense,
lacking the great poetic line, the ineffable
Schubertian contrasts of harmony and mood,
that were so important in Romantic playing.
Britten: Noye's Fludde. Solos, English
Chamber Orchestra, E. Suffolk Children's
Orch., Chorus of Animals, etc., Norman
Del Mar.
London OS 25331 stereo
Stravinsky: The Flood. A Biblical Allegory. L. Harvey, S. Cabot, Elsa Lanchester, etc., Columbia Symphony Orch. and
Chorus, Stravinsky and Craft. (TV: June
14, 1962).
Columbia MS 6357 stereo
Well, well -what would old Noah think
IIere he is in several spellings, two dramatic
productions with music, one intended for
"mystery play" production with numerous
amateurs and children, the other highly professional and intended for TV. In both there
is a Mrs. Noah and in both she sets up an
awful row when Mr. N. tries to persuade her
to get into the ark ; she will not go aboard
that silly contraption. Even the Noah kids
can't persuade her, though the Big Storm
sets in. Both recordings have a Big Storm,
of course, and both bring the story to its
dryland ending.
Beyond this, Messrs Britten and Stravinsky
!
Magnificent Two -Piano Performances.
(Mozart, Mendelssohn, Schubert). Hambro and Zayde.
Command CC 11010 SD stereo
As any reader ought to know, I am highly
allergic to review -titles, the LP with the
built -in review on its cover. Sonically, these
pieces are indeed magnificent, even if their
names aren't specified. (Why should I, if the
album cover doesn't ?) Hambro Is one of the
most competent of piano technicians around:
he and Zayde have been performing for WQXR
78
AUDIO
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AUGUST, 1962
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AUGUST, 1962
79
AmericanRadioHistory.Com
take off in different directions, decidedly.
Britten's work, in the British manner, in both
"conservative" and traditional, intended for
those stalwarts of British vocalism the amateur performer and, especially, the boy
soprano and alto. Never a Britten work without them.
There is much singing of solid old congregational hymns, with mildly modern accompaniment, and the boy singers are innocently in evidence. Also the children's orchestra. Text is given in the original spelling,
which is nice, too. It's the Chester Miracle
Play, out of the Middle Ages. When Mrs.
Noye refuses to board the ark, tho' the
storm his begun, Noah says "Come in, wife,
by the twenty devils! Or else stay there and
get left behind." So the sons have to haul
her aboard bodily. In the olde Englysshe,
though, it goes like this :
"Come in, wife, in twentye derillea waye.'
Or elles stand there without "
"Mother! we praye you all together,
For we are heere, youer owne childer,
Come into the ehippe for feare of the
weither.
"
"That wilt not I, for aile youer call...
"In faith, mother, yeti you ahane,
Wheither thou wylte or nought."
-And
.
in she goes, like a sack of meal.
As for Stravinsky's newest opus, it is remarkably easy to follow considering that the
musical idiom is serial-twelve tone -and the
skips and jumps, without key -sense, are
violent, all over the place. Elsa Lanchester is
Mrs. Noah, and she makes herself felt all
right. There's a voice of God, a chorus that
sings in Latin, and the whole of Creation
gets thrown in before the flood, including Eve
and her Serpent. My main feeling here is that
the pro performers under, the old man himself, are too restrained, too tense and formal.
Can't exactly blame them, for this was a
Big Occasion, with human brass cluttering up
the place. But it doesn't help the story, nor
the music. Later performances, more relaxed,
should bring out more sparkle, punch, and vim.
Stravinsky: Le Rossignol. Reri Grist, Donald Gramm, Loren Driscoll, etc., Chorus,
Orch. Opera Society of Washington,
Columbia KS 6327 stereo
Stravinsky.
I first heard this early opera of Stravinsky
in the lovely Angel recording of 1956, done in
French by the French Radio with an all French cast which included the incomparable
Janine Micheau as the Nightingale and a
superb Jean Giraudeau as the contemplative
fisherman, whose lonely, moonlit song ties the
operatic scenes together. You can guess from
this that I find this new version somewhat of
a shock. It isn't the old opera I used to know
at all.
To be sure, the earlier version was 100%
Frenchifled, as blandly as only the French
can manage it. French singing, language,
French impressionist music. French orchestra
and conductor, French instruments. It did,
though, have a unity of style that was overwhelming. Its musicianship was fabulous all
the way through. Moreover, the Angel performance was imaginative, poetic, dramatic,
full of life and pathos, marvelous in its delicate contrasts of poetry and satire.
Well, Stravinsky wrote it, and here he is,
conducting his own performance, though
every aspect of it was not necessarily under
his control. It is sung in Russian, which
means, alas, that it is mostly mumbled, correctly or no ; the cast is largely American
and not at all Russian. And here we find a
forthright, square, highly professional "oratorio style" rendition, for my ear largely
lacking in subtlety, Stravinsky or no.
The singers sing well, but they just sing,
too often. The orchestra plays well and forthrightly under Stravinsky's solid, obstinate
beat. The contrasts between poetic, moonlit
fantasy-the nightingale's spell-and hard,
satiric superficiality -the preposterous court
of the Chinese emperor-are simply not made
dramatic. Everything runs together, color-
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My rather sorry thought is that, in the
first place, the old tnan doesn't really like his
early work ; or rather, he is not now able to
re- create, in his still so vibrantly progressive
personality, that youthful mood of post-impressionism that was so wonderfully clear in
the original. He has gone far. He is not the
re- creative type, after all, but the new creator,
and today he creates very differently.
Moreover, alas, there is an incongruously
real feeling here of the very thing that
Stravinsky decried in the opera, back in
1907 and 1913, when the two parts of the
work were composed. Then, he poked satire
at the sycophants around the emperor. Now,
he himself is surrounded with such an aura
of sycophancy that we can almost hear it in
these recent performances. I note it "The
Flood" ; I hear it too clearly in this recording too. Stiff, tense, wooden -faced performing
under the nose of the Great One himself and
all his big-brass acompanying cohorts. It
doesn't flow, it isn't natural.
Nobody's fault, and least of all Stravinsky's. After all, the man has ripened to eighty
and Columbia Records finds itself with the
biggest prize it ever hoped to own; can the
big -brass stuff be avoided? Not easily. And
Stravinsky himself, one suspects, lives a
reasonably human life even so, though like
most of the great he surrounds his daily life
with the attentions of a few who can play up
to him with the right imagination and brain power, serving as foils to his every wish and
thought. Inevitable, again.
So-the Nightingale, Le Rossignol, has
sung for yet another emperor, to find once
again that poetry and beauty are at the beck
and call of the Imperial power. I recommend
the Angel recording, in plain old -fashioned
mono. It's a much more poetic, more imaginative performance.
ODDIANA
Handel: Royal Fireworks Music. Woodcock: Recorder Concerto in C; Oboe Concerto in E minor. Telemann Society, Richard Schulze, Theodora Schulze.
Vox STDL 500.750 stereo
Ah, the perils of authenticity This recording of the well known "Firewarks Music"
is, as its producer puts it, "authentic to the
nth degree." Not only are their oboes with
!
AUDIO
80
AmericanRadioHistory.Com
AUGUST, 1962
4\
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old -type reeds, valveless hunting horns and
18th century trumpets, also valveless, but a
military cavalry serpent is heard
contraption made of leather that sounds vaguely
cow -like. But most important of all, and most
controversial, is the pitch. The natural valveless brass instruments here play the natural
high overtones ; some notes are so out of tune
as to be literally halfway between one "ordinary" pitch and another. Vox says that
Handel expected the music to sound that way.
The performers, New Yorkers and Bostonians.
wrestle manfully with the old Instruments
but if you didn't know ahead of time you
might wonder whether this was a musical
nut house. Especially those trumpets and
horns, EEOW They hurt.
Well, the arguments are generally convincing as propounded on a special illustrative
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plastic-yes. It
is true that Handel's brass
had no values and is supposed to have been
able to play only the natural harmonics, the
upper partials of which are violently out of
tune according to our civilized ideas of music.
In theory, there was no way in which these
higher notes could be brought into line. (I
should think that a hunting horn, somewhat
in the manner of later valveless orchestral
horns, might be stopped to some extent to
true up the pitch.)
But what really hits me, as I listen to this
music, is that, authentic or no, it could not
have sounded this way. Men, artists, performers, have done incredible things with instruments, seemingly defying ordinary analysis. I just do not believe, on aesthetic grounds,
that Handel wrote music to be played with as
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here -where the out -of -tune instruments
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in -tune instruments. why double them up?
On similar grounds, I suspect that, specific
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instruments as here demonstrated (and also
in other Vox recordings) is simply not the
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day. These men may be fine modern musicians
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The extraordinary improvement in the playing of other old instruments in recent years,
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Generally speaking, playing of the Telemann group under the Schulzes- conductors
and soloists alternately
of a certain dogmatic, inflexible character, reflected in the
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Frank Martin: Ballade. Hindemith! Sonata. Roger Geob: Concertino for Trombone and Strings. Davis Shuman, trombone, Leonid Hombro, pf.
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special interest to people who play or like
the instrument involved, but not for most
others.
As a matter of fact, the music here is
quite interesting and Mr. Shuman is an
impeccable blower of his trombone, a specially
modified type of his own design. But the whole
atmosphere of the recording is educational professional. Acoustics utterly dead, as of
an old -style sound studio. The trombone about
a foot from your nose. The plano, musically
of equal importance, relegated distinctly to
the background -this is a trombone record,
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It's a worthy series, this, but I don't
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81
AmericanRadioHistory.Com
JAll and
sound of big bands. This threesome is completely at home working with tympani, piccolo, bass clarinet, flutes, french horns or any
odd paraphernalia that turns up in the studio.
The word big no longer covers the subject
adequately, and some inventive soul should
cone with an adjective like sputnik, multiplex
"r polyactive to describe both the bands and
the scoring.
all that
CHARLES A. ROBERTSON
low the roundabout
on Cherokee.
STEREO
Ted Heath: Big Band Bash
Manny Albam:
I
London Stereo SP44017
Had The Craziest Dream
RCA Victor
Stereo LSA2508
Billy Byers: Impressions Of Duke EllingMercury Stereo PPS6028
ton
While astronauts receive thorough instruction before heading into outer space, the
new breed of arrangers commissioned to place
sound spectaculars into orbit often went on
early ascents without much briefing in advance. The trio at work on the current launchings all made initial trips at a time when
even engineers had trouble finding the way,
and their knowledge of jazz and prior experience plotting the course of big bands undoubtedly kept everyone from losing a sense of
direction. Each is a veteran test pilot by now,
fully capable of showing off the added booster
power and latest controls developed by the
engineering staffs of the respective labels for
this autumn's series of flights. Nobody is
ready to try a moon shot as yet, and
rhythmically they all keep at least one foot
safely on the ground.
Johnny Keating calls signals during Ted
Heath's first journey in a British craft bearing the mysterious letters I.M.20('.R., a new
addition to London's l'hase 4 stereo trademark signifying nothing less than "individually monitored 20 channel recording ".
covers contain a more
graphic explanation, including a photo of the
huge control panel on the new custom built
console mixer itself. Warner Bros. recently
demonstrated the flexibility of a sixteen channel console in introducing its Stereo Workshop Series, so the next mark for some
company to shoot at is an even two dozen.
One refinement provided on the London console is both chamber and electronic echo
facilities on each channel. This method of
applying individual reverberation permits any
instrument or entire section to be moved
to the front or rear in depth at will. aside
from the greater scope for movement across
the stereo stage. Warner Bros. boasts only
of electronic reverberation, but the secret
of echo is that it should either sound natural
or pass unnoticed. By the same token, twenty
channels are no better than a lonely ace in
the hole unless handled with imagination
and the good taste shown here.
A regular on the band's arranging staff
for many years, Keating knows both Heath's
brand of showmanship and the solo strength
of each member. Now established as a freelancer, he directs stereo fantasies of his
own when not busy on commissions front his
former boss. Of course, no big hand in history ever sounded the way the Heath crew
does when it charges through the mazes of
Phase 4 plus. Percussive effects turn up anywhere at anytime, and even Chick Webb
never thought of using finger cymbals on
A-Tisket A- Tanker. A Parisian hansom cab
jogs along on Ciopin- Cfopant, and an entire
camel caravan moves through In .4 Persian
Market. Mandolin and guitar joust with a
walking bass line on Capuccina, and the old
Glenn Miller sound is revisited on Out Of
Nowhere. While the Londoners enjoy nothing
so much as a good bash, a few quiet moments
do provide dynamic contrast. Steady hands
at the controls keep reverberation from becoming obtrusive, but many an ear will be
strained trying to detect the amount and
type of echo employed to create various
effects. Little effort should be required to folDouble -fold album
trail of warlike tom -toms
Manny Albam's last stereo action exploit
was to juggle two tunes at once, so interpreting a dozen dreams is just the psychological
cure needed to repair a split personality.
Not that the word dream in every title means
variety is lacking, as three different studio
ensembles browse among the assorted reveries.
I'hil Woods, alto sax, and trombbonist Bob
Brookmeyer weave solos in and out among
fourteen strings, percussion and regulation
rhythmn section on Street Of Dreams, and
/ Can Dream, Can't I. They also share featured roles with trumpeters Joe Newman and
Clark Terry during a lively outing with full
band on Wrap Your Troubles In Dreams, and
Someone's Rocking My Dreamboat. Albam
boosts the trumpet section a notch or so
higher by voicing Bill Slapin's piccolo in with
the section. The third group surrounds soprano obbligatos of Miriam Workman with
the same close orchestral support that Duke
Ellington gives a vocalist, as harp, tympani
and french horns add extra splashes of color
on Darn That Dream, and A Kiss To Build
A Dream On. Liner diagrams show the starting positions of each group, but the action
Albam dreams up for engineers Bob Simpson,
Dick Gardner and Ernest Oelrich must be
heard before it can be Imagined.
e
Billy Byers returns to the stereo wars after
sojourning in Paris several years, during
which time he worked with Ellington as technical advisor on the film "Paris Blues." Meeting the double challenge of the composer and
his orchestra should be big enough for any
arranger without the extra load of channel
switching and other effects. Byers avoids a
head -on collision by taking a different route
whenever possible, starting right out with a
5/4 detour through Spanish Harlem on Take
The A Train. Another example is Sol Schlinger's baritone sax solo on Solitude, which offers an interesting contrast to Harry Carney
and the rest of the original sax section instead of inviting comparisons. The 21 -piece
studio band does afford a trumpet section
capable of stopping all competition, as it
includes Ernie Royal, Joe Newman, Clark
Terry, and a certain Doctor Christian who
might be Doc Severinson in disguise. The
increased booster strength in this case is the
35 mm magnetic film which Bob Fine uses at
the former Everest studios in Bayside, L. I.,
and the greater signal to noise ratio pays off
when a select bunch doubles on pursed lips to
blow up a windstorm on Caravan. Also when
Osie Johnson borrows pianist Patti Bown's
shoes and manipulates them on a box covered
with sand to reproduce the sound of Baby
Lawrence's dancing feet on Don't Get Around
Much Anymore. Additional percussive touches
are supplied by Eddie Shaughnessy and Eddie
Costa, but some label should persuade Sonny
Greer to bring back his chimes and collections
of traps for Sophisticated Lady, Mood Indigo,
and other Ellington classics. Rather than
movement from front to back, Mercury offers
the enticement of "infinite depth," obtained
by providing each section with an extra pair
of overall microphones.
Fall is the traditional season for removing
the veil of silence from new developments,
and other companies will undoubtedly bring
out spectaculars in time for the round of
audio shows. On the basis of these three samples, it is safe to say that the various engineering staffs will advance stereo frontiers
some distance further in space. Meanwhile,
the jazz arrangers and soloists involved are
gradually altering and expanding the usual
Shelly Manne 8 His Men: Checkmate
Contemporary Stereo 57599
As the heroic threesome in charge of this
television crime series never stoops to ordinary private -eye tactics, the original Johnny
Williams' score is too fancy and formal to be
called jazz. Holding down the percussion chair
in the studio orchestra was Shelly Manne, a
seasoned veteran of the battles between Hollywood cops and robbers, having served valiantly under both "Mr. Lucky" and "Peter
Gunn." Henry Mancini provided distinctive
jazz scores for these shows, and the resulting
albums paid off much better than crime ever
did. This amount of loot is too tempting for
a mere operative to resist, and Manne enlists
four compatriots in an effort to outdo Mancini
at his own game. Everyone is allotted plenty
of solo space to cover the various themes and
bring about a conversion to mood jazz. Richie
Kamuca, tenor sax, and Conte Candoli, trumpet, do the preliminary investigation, but the
case is finally broken by the rhythm team of
Russ Freeman, piano, Chuck Berghofer, bass,
and the boss himself. Devotees of Mancini's
thrillers will enjoy this suspense story just as
much, and Howard Holzer sets each colorful
episode in roomy stereo.
Art Farmer -Benny Golson Jazztet: Her «.
Mercury Stereo SR60698
And Now
Dave Pell:
I
Remember John Kirby
Capitol Stereo ST1687
Fond memories of the John Kirby sextet,
one of the most successful little bands of the
swing era, are recalled on both these recordings. The Art Farmer -Benny Golson Jazztet
has arrived nt the same pinnacle by following
the methods, if not the style, of the earlier
group. Careful planning, original writing,
unique arrangements and hard work all went
into the hopper, along with the considerable
solo talents of the co- leaders. The climb to the
top was swift, but staying there requires constant improvement and a fund of ideas. The
other members have all been replaced more
than once over a three -year period, and this
session marks the arrival of four new faces,
including trombonist Grachan Moncur Ill,
Harold Mabern, piano, Herbie Lewis, bass,
and drummer Roy McCurdy. The program
touches all bases on today's jazz scene, and
the commodity is highly vendable in clubs and
on records, starting with the gospel driven
Tonk. Moncur and Mabern join the leaders in
contributing originals, and the standards include Just In Time, and In Love In Vain.
Tommy Nola engineered the date, and the
Jazztet will definitely be remembered twenty
years from now.
Dave Pell heard the Kirby crew perform at
its prime, but the records are around to serve
as a reminder. Some arrangements are copied
note for note, while others undergo a slight
refurbishing. Marty Patch and pianist Johnny
Williams composed new tunes reminiscent of
the band's style, and they take a place beside
Rose Room, Anitra's Dance, Undecided, and
Coquette. Finely turned solos on alto sax from
Benny Carter are mainstays, with Pell playing clarinet and Ray Linn on trumpet. Among
the missing, unfortunately, is an example of
O'Neil Spencer's extemporaneous vocalizing,
when Kirby threw away the book and played
the blues.
Presenting The Buddy DeFranco -Tommy
Gumina Quartet
Mercury Stereo SR60685
With the continuing popularity of tenor
sax and organ in combination, it was inevitable that a clarinetist would get together
with an accordionist before long. Being less
massive and unwieldy, this spanking team
trots out with a lighter tread and swifter
AUDIO
82
AmericanRadioHistory.Com
AUGUST, 1962
the incomparable new
-v-
HVRE
SERIES M33
"Bring"
out sound
from records
that more
expensive
cartridges
do not"
estor_ McGraw
a
HIGH FIDELITY PHONOGRAPH CARTRIDGES
NOT HOW MUCH? BUT HOW GOOD?
According to United Press' Preston McGraw, the Shure series M33 cartridges
are "so good that a hard - shelled listener might suspect Shure engineers of
not knowing what they had when they hung a price tag on them."
We knew, all right, Mr. McGraw. It's just that we don't believe the best
sounding cartridge need be the most expersive. The new Series M33, after all,
was developed by the same team of engineers who developed the redoubtable
Shure M3D series ... the world's first truly high fidelity stereo cartridge.
Numerically, Shure has made more highest -quality stereo cartridges than any
other manufacturer -and they're used by more critics and independent hi-fi
authorities than any other. Chronologically, Shure had a two year head start on
the others. In short, Shure has learned how to make these critical components
in the kind of quantities that result in lower prices.
THE SOUND OF SPECIFICATIONS
Again quoting Mr. McGraw: "Professional engineers are largely impressed by
specifications, and the specifications of the M33 (except for compliance) are
not unprecedented. But the way it sounds is something else again. The M33
puts flesh and bones on specifications. It brings out sound from records that
more expensive cartridges do not."
He's right. To begin with, Shure specifications (as published) are not
theoretical laboratory figures, or mere claims ... they are actual production
standards. 20 to 20,000 cps. response may appear average. But what the bare
specifications don't show is that the M33 series goes right through the audible
spectrum without a hint of the break -up prevalent in most other cartridges.
Also, it is remarkably free from disconcerting peaking at this frequency or that.
Result: absolutely smooth, transparent, natural sound re- creation. (Incidentally, where would you find a record that goes from 20 to 20,000 cps. with genuine
music on it ?)
Separation is over 22.5 db. at 1000 cps. Much more than necessary, really.
Again, the separation figure doesn't show that the M33's separation is excellent throughout the audible spectrum. No cross -talk between channels.
Even when an oboe plays.
And the matter of compliance: 22 x 10 -6 cm. per dyne for the M33 -5.
Now there's a specification! Acccrding to Mr. McGraw, the Shure
stylus feels like a "loose tooth." And so it should. The incredible
compliance of the M33 -5 gives i- the ability to respond instantly to
the manifold and hyper -comptex undulations of the record groove.
Superior sound is one outcome of the superb compliance.
Another is the ability to track the record at low force. The
M33 -5 will track at forces as /ow as any other cartridge on
the market today.
M33-5
SPECIFICATIONS
Channel Separation (at 1000 cps!
Response
.V.,Frequency
";Output Voltage (oer channel, at 1000 cps)
Recommended Load Impedance (per channel)
Compliance; Vertical d Lateral
Tracking Force
Inductance
D C.
Resistance
Stylus:
Terminals
Mounting Centers
Over 22
5
M33-7
Over 22.5 db
db
20ík 20.000 cps
20 to 20.000 cos
6m.
6
ohms
22.0, 10-6 cent.
per dyne
17.000 ohms
47,0110
%
to
600
m
20.0 e 10- cent
per dyne
1.5 to
1.5 grams
n,lhhenrys
3
600 m,lhhenrys
750 cams
750 ohms
.000'
.0007' diamond
4
.
grams
diamond
terminal. (Furnished with adapters for 3- terminal
stereo or monaural use.)
Fits Standard
'h'
One other item: if your tracking force is 4 to 6 grams, the even lower cost
M77 Stereo Dynetic will deliver the best sound you can possibly get from
your cartridge -arm combination.
THE ULTIMATE TEST
a listen. In fact, compare the Shure M32 series with any other cartridge,
regardless of price, in A -B tests (we do it all the time). If you are not impressed
with the distinct difference and greater naturalness of the Shure, don't buy it.
That's punishment enough for us.
Give
PRICES:
Why spend more than you must? M33 -5 and M33 -7 net for$36.50
The M77
is only $27.50
If you insist on Shure when you buy, you can demand more from the rest of
your system when you play ... write for literature, or still better, hear them at
your high fidelity showroom: Shure Brothers, Inc., 222 Hartrey Avenue,
Evanston, Illinois.
AUDIO
AUGUST, 1962
83
AmericanRadioHistory.Com
change of pace. Buddy DeFranco claims the
partnership came about while he was looking
for a pianist to fill out his quartet, and the
move proves to be one of the happiest and
most rewarding possible. A poll winner since
1945, the clarinetist came under frequent
critical fire for coldness of tone and a calculated technique, but all that is changed now.
Tommy Gumina voices his accompaniments to
ensure a full, warm sound and presents
enough of a challenge while improvising to
keep anyone on the alert. Rarely has De
Franco been quite so responsive to another
player, and together they engage in rapid
interplay or create a unique blend. Next to
be heard from will be flute and harmonica
joined in harness. The group's original theme,
Never on Friday, a rocking blues written by
Gumina, tops a program containing such
standards as When Lights Are Low, S'Wonderful, and You Are Too Beautiful. Bill Plummer, bass, and drummer Johnny Guerin complete the quartet. Bruce Swedien of Chicago's
Universal Recording Studios engineered the
date, and the stereo version is well worth obtaining for the wide dynamics and subtle
voicings.
Harry Belafonte: The Midnight Special
RCA Victor LSP2449
Influence is perfectly capable of flowing in
either direction, even though not many established artists admit the fact or even confess
to reversing the flow. Of all the attempts by
young singers to hit the mark Harry Bela fonte set with his deput album, one of the few
to come really close was the effort last season
of Oscar Brown, Jr. Besides scoring almost as
high in the charm and personality division,
the Chicago youth introduced original material and tried n more modern approach. For
once the hot breath of new talent singed Bela fonte's heels enough to produce a reaction,
and his latest album sounds even fresher and
more lively than the first. While Belafonte
would never deign to copy rival styles, his
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performance does show a greater concern for
contemporary trends, gathering into the fold
recent developments in gospel singing, soul
jazz, and the country blues revival. Belafonte
also bestirs himself to forge verses and create
new dramatic interludes on Crowded Song,
Muleskinner, Michael Row The Boat Ashore,
and Did You Hear About Jerry? Besides such
jazz luminaries as Don Lamond, Joe Wilder
and Jerome Richardson, the assisting force
includes Bob Dylan, harmonica, and guitarist
Millard Thomas. The independent deal made
on this release consolidates the singer's dominant position still further. While again selecting Bob Simpson as trusty engineer and remaining with RCA Victor for distribution,
Belafonte negotiated a cheaper rate with Columbia for the pressings.
Olguita: Latinsville!
World- Pacific Stereo 1801
Tino Contreras: Percusiones Mexicanes
Capitol Stereo ST10310
To follow up the success of an album of
authentic pachangas in an intimate setting
for World -Pacific, Olguita turns to the big
band sound of George Hernandez and a collection of new rhythm songs written to show
off her vocal antics. The uptempo arrangements call for an assisting vocal group to
answer her ad -lib chanting, a pastime at
which she is especially adept. According to
Oliver Berliner, who produced the session
and wrote the notes, a girl with the ability
to chant effectively is called a "montunera"
or "guarachera" in the Caribbean, and the
pace is both demanding and exhausting. Only
expert dancers need apply. Two boleros composed by Arturo Castro provide an enjoyable
respite.
Tino Contreras, a virtuoso drummer in the
Afro -Cuban tradition from Chihuahua, made
a reputation at home before casting his eyes
across the border. His first album to be released here is designed to catch the tourist
trade or attract the attention of booking
agents for a trip north. The small combo includes trumpet, saxes, and a rhythm section
with a spare bongo player. Latin rhythms and
jazz are combined in a style suitable for
smart cocktail lounge or hotel bar, and the
tunes consist of such gringo favorites as
Night Train, Ebb Tide, Perfide, and Matilda.
Just the same, the album is a sonic treat and
will rate high with dancers.
Edith Piaf: Potpourri par Piaf
Capitol Stereo 5T10295
Shoshana Damari
Vanguard Stereo VSD2103
Although these singers represent different
ethnic backgrounds, certain similarities in
tone and style emerge on hearing one perform
after the other, and playing their latest releases in tandem can be an interesting experiment. Often faint and indefinable, the
resemblance is most noticeable during songs
dealing with the joys or agonies of love.
Guessing whether they both endured equally
tremendous love affairs, or just developed that
way, is part of the game. Edith Piaf's romantic trials are well known, but direct comparison also brings out Near Eastern qualities
not always so easily observed in her singing.
One of the factors Clint distinguishes her from
the run -of- the -mill Parisian chanteuse could
well be a deeper feeling for exotic sounds from
lands along the Mediterranean. As though to
emphasize the point, Miss Piaf departs briefly
from her usual program of French chansons
to include Ernest Gold's theme from the motion picture "Exodus." The song becomes just
as much her own as the characteristic tales
of the boulevards related on Marie Trottior,
Dans Leur Baiser, and La Bella Histoire
D'Amour. None of her great vitality seems to
be diminished by recent sieges of illness, and
stereo keeps her from towering over the orchestra conducted by Robert Chauvigny.
Shoshana Damari divides her attention between older traditional Hebrew muisc and
folk material gathered by the new wave of
Israeli composers, including four songs of
Moshe Wilensky. A native of Yemen, she offers five ancient tales from that region, written by the poet Shalom Shabazi in the seventeenth century. Elyakum Shapira provides
the arrangements and conducts the spirited
little orchestra. Religious themes are treated
AUDIO
84
AmericanRadioHistory.Com
AUGUST, 1962
as rhapsodically as songs of love, and it seems
likely that Mise Piaf shares a corresponding
knowledge of religious chant tradition. Whatever a study of the two singers together reveals, the project is bound to sharpen listener's wits and hearing.
jhsn
syt
L
Grommes announces a completely
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to provide Multiplex Stereo with
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Owners of Grommes FM Tuners will
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Your Grommes equipment is
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Remember, when you buy
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regardless of price.
Ask your high fidelity
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Grommes. You will hear
music with the new
Grommes extra = 'presence ".
V
Stan Getz: Focus
Verve VSTC260 (UST 3 -track tape)
Because the recording of this collaboration
between Stan Getz and Eddie Sauter rates as
one of the most important of the year, its
preservation on four-track stereo tape is thoroughly warranted, and the presence of an
eighteen piece string orchestra under Hershey
Kay only makes owning a tape copy that
much more desirable. Getz, who had asked the
composer to write an extended work for him,
was somewhat surprised to find the tenor -sax
part omitted in the final score. All seven sections were conceived to fit the Beaux -Arts
Quartet, which forms the nucleus of the orchestra, on the theory that Getz could develop
solos from the lead sheet. Getz depended upon
his ear instead, listening to Kay rehearse the
T
strings and then improvising in the studio.
The stereo tape and Ray Hall's engineering
show clearly how Getz finds his way among
the strings, or thrusts himself free to create
counter melodies and bold, original lines. The
basic rhythm is that of the string quartet,
even during the section on which drummer
Roy Haynes assists, but Getz plays before,
after and on the beat, or at times heeds an
independent rhythm of his own in the manner
of Sonny Rollins. Admirers of both men will
be delighted to hear Sauter experimenting
again -and Getz making it work.
Ella Fitzgerald: Clap Hands, Here Comes
Charlie)
Verve VSTC265 (UST 4 -track tape)
Every so often someone drops innuendos
about Ella Fitzgerald's ability as a jazz singer,
causing her to reaffirm her superiority once
again as she does on this four -track tape. If
a little unkindness produced the performance
heard here, then critics are welcome to cast
all the aspersions they want. In fact, the program in chronological order could easily serve
as a short history of jazz singing, starting
with the tune which by reasons of seniority
titles the album. No attempts are made to
grab applause by tricks, and the singer aims
straight to the color plexus in reverting to
the swing era with My Reverie, and Jersey
Bounce. Billy Holiday is saluted on Good
Morning Heartache, and You're My Thrill,
and the 19405 are recalled on 'Round Mid nit/ht, and Night In Tunisia. The recent past
is represented by Cry Me A River, and Spring
Can Hang You Up The Most. If anyone at the
close still clings to doubts as to the jazz content of the vocals, there can be no such reservations about the accompanying quartet. The
notes fail to mention the names of Lou Levy,
piano, Herb Ellie, guitar, Joe Mondragon, bass,
and drummer Stan Levey, but stereo makes
up for the omission by throwing an extra
spotlight on each supporting member.
Kenny Ball: Midnight In Moscow
Kapp KTL41039 (UST 4 -track tape)
It takes an outstanding hit to transport a
British traditional band across the Atlantic,
and enthusiasts on this side can be thankful
that the Muscovite title tune struck public
fancy. In reaching a large teenage audience,
the adaptation from an old Russian melody
will introduce many new listeners, via this
four -track tape, to such New Orleans standbys
as Tin Roof Blues, High Society, and Savoy
Blues. Kenny Ball, who regarded the music
with affection long before it became so popular at home, adheres closely enough to "Trad"
strictures to please righteous fans over here.
His trumpet playing commands respect, and
his vocalizing is always enjoyable. Despite
another Russian salute on Dark Eyes, the
septet owes everything to this country and
acknowledges the debt with American Patrol.
Anyone too old for the Moscow trip can revisit You Must Have Been a Beautiful Baby,
and Puttin' On The Ritz. No "Trad" band is
complete without a banjo, and Paddy Light foot's joyous beat is one of the reasons why.
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9101 King Avenue, Franklin Park, Illinois, Dept. Ti
85
AUGUST, 1962
AmericanRadioHistory.Com
Stereo places the band. ready for dancers. on
the stage of a large hall. Let's hope the State
Department decides to bring over the band
itself.
Oscar Peterson Trio: West Side Story
Verve USTC268 (UST 4 -track tape)
With the release of the film, Leonard Bern stein's score is well Into the second heat of
recordings, and it was inevitable that a new
jazz version by a piano trio would be in the
running. Andre Previn teamed with Shelly
Manne to place a Contemporary entry high
on the list while the show was still on Broadway. A late start never leaves Oscar Peterson
with anything less imaginative to say than
those first off the mark. His main problem is
editing a performance down to reasonable
length, and the ideas left over after the session would undoubtedly fill a pleasurable hour
er so beyond the thirty -seven minutes allotted
on this four-track tape. The tunes are thoroughly seasoned by now, so the pianist gives
a slight Latin twist to Maria, and finds a
perky tempo for I Feet Pretty. Ray Brown
plays idyllic bowed bass on Somewhere, and
then plucks furiously on Jet Song. Tape allows every stroke of Ed Thigpen's elegant
brushwork to come through crisp and clear,
while Bob Simpson's intimate stereo setting
shows off the trio to best advantage. By way
of an encore, all the themes are tied together
in a well organized and swinging resume of
the score.
The Weavers' Almanac
Vanguard VTC1641 (UST 4 -track tape)
The young, carefree folk groups now so
popular among the college crowd never knew
what hard times are like, and panhandling for
anything besides folding money would never
enter their minds. Any worries they may have
stem from automation, nuclear fission, and
the hazards of travel on the Boston subway.
Depressions are dealt with in sociology and
history classes, and not at fraternity song
fests. The Weavers, or at least the senior
members, know from experience, and earnest
students can learn from this four -track tape
what the subject is all about by listening to
E. Y. Harburg's lyrics for Brother Can You
.'pare (rime. Today's stock market plungers
I
Ifçjj
Why Burgess No
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will be reassured as to this country's resiliency by two other depression songs, We're AU
Dodgin', and Which Side Are You On, which
are served up with meat and potatoes. The
quartet also remembers when gospel singing
was more apt to take place in tentshows than
at Carnegie Hall, and stereo gives them a
chance to raise the roof with Fight On, and
True Religion. Fresh arrangements and additional words are the only concessions to modernity, but the Weavers are still tops for all
that.
Southern Tropical Harmony Steel Band:
Audio Fidelity AFSD5967
Limbo Party
Calypso Exposed
Cook 1189
While conga and bongo drums are adequate
for most Latin rhythms, nothing generates
greater excitement at a limbo party than an
authentic steel band. Sid Frey recorded the
Southern Tropical IIarmony group on location
in Trinidad, giving the ping and crash of
mallets on metal the full benefit of stereo.
The program gets underway with an exhibition for the tourist trade, as the first side consists of such popular items as the Pachanga,
Cachita, and Never On Sunday. The reverse
side contains all the abandon of Carnival
time, being wholly turned over to almost fit teen minutes of uninterrupted limbo rhythms.
This reduces chances of any break in the
music during crucial moments of the dance,
which involves passing face forward under a
suspended bamboo pole at progressively lower
levels. Instructions for making the limbo pole
set -up are detailed on the liner, but the problem of how best to reach the other Bide without disturbing the pole is left unsolved. The
steel band, with its five octave range of tenor,
guitar and bass drums, is no easy subject for
the microphone. This is one of the best recordings yet of the 55 gallon monsters in native
surroundings.
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Burgess tape. You get a lower noise level
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Emory Cook explored the land of calypso
and steel bands several years ago, and his
field recordings from the West Indies deserve
to be represented in every collection. The
concoction offered here comes from his own
private stock, which yields up selections too
censorable to be issued before. The tapes are
all pre -stereo, and a few sound as though the
microphone was concealed beneath a shirt
front. The lyrics of Mighty Cypher, Lord Melody Herbert Howard and other calypso kings
are definitely not for the ears of children, but
they should fill rest periods between limbo
sessions very nicely.
DIVISION OF SERVEL. INC.
MAGNETIC TAPE DIVISION
FREEPORT.ILLINOIS NIAGARA FALLS. CANADA
a
Gerry Mulligan: At The Village Vanguard
Verve VSTC267 (4 -track UST tape)
About the only thing Gerry Mulligan's Concert Jazz Band lacked was enough of the right
places to play. Many of its best arrangements
are hardly suited to ballrooms, and only during the last months together did the members
work up the amount of steam required to fill
a large auditorium or outdoor arena. While
the jazz clubs were highly receptive, rooms
the size of the Village Vanguard are too small
to accommodate all the customers a band
needs to show a profit. Actually, the band was
eminently suited to locations the dimensions
of Town Hall, and they are in plentiful supply in high schools and on college campuses
throughout the country. But until band managers and booking agents join in forming an
organization similar to the Community Concert groups, some of the most desirable halls
in the nation will be closed to jazz units. Record companies sell jazz to many of the people
who patronize Community Concerts, and various folk singers are successfully tapping the
same audience. Perhaps record companies had
better take over this part of the business as
well, but more intelligent packaging than is
applied to the average jazz road show will be
imperative from the start.
Meanwhile, stereo equipment in the home
is an ideal medium for the band, and this just
released four-track UST tape reveals how
spontaneously it reacted to a live audience. On
this recording, at least, the band sounds better
and makes a more favorable impression than
it did in some of the places it was forced to
work. Among the high points are Blueport,
Lady Chatterley's Lover, and the leader's
switch to piano on Let dfg People Be.
.
AUDIO
86
AmericanRadioHistory.Com
AUGUST, 1962
6-db -per- octave slope were
PHONO CURVES
(from page 28)
be used. Here, R is the resistance at the
Aux input of the amplifier. As you may
recall, this section of the amplifier provides an output with a uniform frequency response when a constant voltage is applied at the input. C, is the capacitance in the equivalent circuit of the
cartridge. A capacitor, C, must be chosen
to shunt the resistive input impedance
(A) APPROXIMATE RESPOr.
3db
Build the finest professional
color TV Set ever designed
.ib
(B) ACTUAL RESPONSE
,db
2db
I
f=0cps
f2
fl
fi=
I
fo-
2nR(CtC)
I
NO
readily calculated from Eq. (19). It
should be remembered that these results
fit the curve to a fair approximation
only. In all practical situations, reproduction will be satisfactory.
The capacitor can be built into the
amplifier, shunting the input resistor. If
the frequency response is checked, it
should not alter the response of the amplifier. This is especially true if the output impedance from the signal generator
is low. Should a high- impedance signal
source be used, some rolloff at the high
frequencies may be noted. This rolloff
will be a function of the impedance of
the generator.
constants into Eq. (19) would make C
approximately equal to 2200 pf.
Whatever the values of C, and R may
o
-mdbL
be, the capacitor required to shunt R
for a reasonably flat response can be
extended back
to the 0 -db reference axis, it would intersect it at fa. Thus curve (A) of Fig.
14 is used as an approximation for this
curve, plotting fa on the 0 -db axis rather
than 3 -db below this axis. This approximation has been, and will continue to be
applied through the article for convenience and ease of illustration.
As an example in the use of Eq. (17),
assume R= 5 x 105 and C, = 5 x 10-10. A
good approximation to the required
curve in Fig. 8 would let f =120 cps.
This was discussed above when referring
to Fig. 9 and Eq. (4). Substituting these
4fo
"Hcolor
Fig. 14. Response of circuit of Fig. 13.
of the amplifier, R. The equation characterizing this network is
R /(1+ jtoRC)
east
F. q. (17)
eta
R/ (1+ jwRC) + 1 /jwC,
where R /(1+ jtoRC) is the impedance of
the parallel RC combination and 1 /jwC,
is the impedance of C,. Simplifying Eq.
(17) gives
jwRC,
eont =
E q. (18)
j(wRC, +(oRC)'
The frequency when the output has
rolled off 3 db is:
j(wRC, +wRC) =j
This Color TV Kit is designed around the most expensive, thoroughly engineered and newest RCA TV Color Receiver.
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1
RC, + RC
and f -
Eq. (19)
27t1i(C,+ C)
The jwRC, term in the numerator indicates that the output is zero at d.c.
with a steady rise of 6 db per octave.
The curve fitting Eq. (17) is shown in
(A) of Fig. 14. The output drops approximately 6 db per octave beginning at
the frequency f =1 /2AR (C, + C), and is
equal to zero when f =O.
It should be noted that (A) of Fig. 14
is an approximation to the actual curve.
The output is actually 3 db down from
its maximum when fo= 1 /.2sR(C, +C);
it is down 7 db when f, = f0/2; it is
down 12 db at f2 = f, /2; and it drops
6 db per octave from there on, as shown
in (B) of Fig. 14. If the curve with the
AUDIO
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INSTRUCTION MANUAL:
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-- -p
D
fi (1.
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1
ELECTRONICS, Inc.
Grey Oaks Avenue, Yonkers, N. Y.
Telephone: (914) YOnkers 5.6900
AUGUST, 1962
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Dept. AC -8
Name
Dept. AC -s
Address
City
Zone
State
87
AmericanRadioHistory.Com
problem
solving
microphones
s
4'!,
Harold Lawrence
of the U.S.S.R. record industry is located in a tall, gray
building in Katchalova Street, about
halfway between Moscow State University
and the Tchaikovsky Conservatory. From
this center flow the decisions that result
in an annual output of 1200 new LP releases and more than 100,000,000 records,
with an expected rise to the 200 -million
mark in 1963.
In view of these impressive figures, one
would not be surprised to see the corridors
and offices of Fsyesayuznaya Studia Gram zapici bustling with activity. The activity
is there all right, but in muted tones. Following the receptionist through the studios,
we passed a trio of technicians surrounding an Ortofon cutter and exchanging
whispered comments; in another we caught
a glimpse of a young woman in a white
smock gazing at the meters of a Bruel and
Kjaer Spectrum Recorder ; and we looked
in on a quality -control worker carefully
lowering the pickup on a metal part. All
was hushed intensity.
Finally, we arrived at our host's office.
Mr. B. D. Vladimirsky might be described
as the classical artists- and - repertory chief
for the Soviet Union. Striking in appearance-his shock of gray hair contrasts
vividly with his swarthy complexion and
dark eyes -he is affable, soft -spoken, and,
unlike many of his Western A. and R.
counterparts, calm. There is a plausible
explanation for his apparent serenity.
Here is an executive whose roster includes
such artists as Sviatoslav Richter, Emil
Gilels, David Oistrakh, Mstislav Rustropovitch, Galina Vishnevskaya, the Leningrad Philharmonic, the Moscow Philharmonic, Kyril Kondrashin, Eugen Mravinsky; in fact, any and every Soviet musician or musical organization worth recording. No competitive Soviet record company
threatens to lure any of these artists away
from his label. He is in a position to plan
the "dream" programs for his nation's outstanding performers. As might be expected,
the selection of classical symphonic, vocal,
and instrumental repertory is made in
Moscow. However, not all Soviet recording
is centralized. In the fields of folk and
popular music, each of the "distributors,"
or local branches, makes recommendations
to the capital for repertory and artists,
and often records special material. Since
Russia is merely one of sixteen Soviet republics, a wide variety of non -Russian
music is taped throughout the U.S.S.R.
from the Outer Mongolia to the Ukraine.
How are records sold in the U.S.S.R.,
Although a few shops deal exclusively in
phonograph discs, reported Mr. Vladimirsky, most sales are made in the department
stores, or "universal" shops, as they are
called. Only four purely record outlets
THE HEADQUARTERS
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IPI
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Record Making in the U.S.S.R.
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response 50 to 15,000 cps. With
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exist in Moscow, for example. Has the
stereo record made any headway in the
U.S.S.R.? No, only a small number of
stereo discs have been manufactured, although the Soviets are now recording
nearly all their classical works on two channel tape and have recently built their
first consumer stereo phonograph. Unfortunately, Mr. Vladimirsky was unable to
demonstrate the player for us-no car-
tridge.
At this point, Mr. Vladimirsky turned to
Mr. A. I. Archinov, the chief audio engineer of the U.S.S.R. Gramophone Recording Studios. A gentle, balding, bespectacled
man, Mr. Archinov speaks English fluently,
his school training having been supplemented by a trip to the U.S.A. twenty -five
years ago. Here, the interview shifted
gears as both men fired queries at us regarding American techniques of sound reproduction in general, and those employed
by Mercury Records in particular. (The
American firm was then recording at the
Tchaikovsky Conservatory's Great Hall
with its own staff and recording truck. Its
presence in Moscow naturally aroused extraordinary interest on the part of Soviet
sound engineers since this was the first
time the authorities had granted a Western
company permission to record there with
its own equipment.) By the manner in
which the Russians absorbed our replies it
was obvious that they were well acquainted
with many of the latest developments in
techniques. Mr. Archinov, a
reader, makes frequent trips
throughout Europe, inspecting components,
meeting with colleagues in the field, and
generally keeping his finger on the pulse
of the audio industry. In recent years, he
has purchased quantities of new equipment
for the U.S.S.R. studios from Hungary,
France, Denmark, Germany, and England.
In addition, he informed us, the Soviets
have come up with a professional tape recorder of their own. Not yet in full production (only thirty exist), the new machines are in service in the radio and recording studios and in various concert halls
in Moscow. Conspicuous by its absence is
American -made equipment. The only U. S.
product spotted by us was a roll of Scotch
brand splicing tape. Some Soviet editors
still use ordinary cellophane tape.
The major portion of classical recording
is done in four cities: Moscow, Leningrad,
Odessa, and Riga. Three of the Soviet halls
used for recording are internationally
known-the Bolshoi Hall of the Tchaikovsky Conservatory and the Kolony Hall,
both in Moscow, and the Leningrad Philharmonic Hall, which countless artists have
praised for its near -perfect acoustics. Mr.
Archinov also singled out a new recording
site: a Riga Church in which he plans to
record Bach's Mass in B Minor this fall.
While on the subject of acoustics, both men
stated their preference for concert halls
recording
faithful
AUDIO
AUDIO
88
AmericanRadioHistory.Com
AUGUST, 1962
over studios for recording classical works,
even though studios in the same building
had been originally designed and built for
multi -purpose recording.
Soviet engineers employ the MS system
exclusively for their stereo recordings, thus
producing a compatible stereo tape. On
Katchalova Street, tape -to -disc transfer is
made on Ortofon equipment, with 60 watts
per channel driving the cutting mechanism.
The monitor speakers which had been used
previously had proved unsatisfactory. According to Mr. Archinov, they were bass heavy and caused the cutting engineer to
engrave his master lacquers with too little
bass. Two speaker systems are now in operation: "ML" (Hungarian), and PatheMarconi (Finch). Disc playback amplifiers are 15 watts per channel.
An interesting feature of the Moscow
studios is the use of rugs for acoustical
treatment. From both the sound and esthetic standpoints, this is a most effective
idea.
Two artificial reverberation systems are
used by the Soviets in re- recording. The
first is the E.M.T. sheet reverberator, made
in West Germany ; the second, a magnetic
reverberator manufactured in Russia. The
latter unit has the advantage of eliminating "repeats" the bugbear of units of this
type.
Pressing facilities exist in Moscow, Riga,
Leningrad, and Odessa. Two quality
standards are maintained: one for domestic consumption, the other for export.
Like books, records are inexpensive in the
Soviet Union, but are on a lower technical
level than equivalent Western discs and
tend to wear out rapidly. (This may be
partly due to the vinyl compound, and to
the record players, of course.) That the
Soviet public is quality -conscious, however, is proven by the fact that American
stereo records are in intense demand among
discophiles.
To round out our visit, Mr. Archinov
played some recent, unreleased stereo tapes
for us of John Ogden, the Moscow Chamber Orchestra under Rudolf Barshai, the
Moscow Philharmonic directed by Kyril
Kondrashin, and Galina Vishnevskaya.
Then, with characteristic Russian hospitality, he took us downstairs, helped us
hunt for a cab, found one, gave our address
to the driver, and warmly invited us to
E
visit him again and stay longer.
AUDIO ETC.
(from page 14)
actually hold the practical top output of a
stereo groove not too far from the top
mono output.
As to those orchestral doublings, Stravinsky refers, again, to the "color" mixtures of instrumental timbres, numerous instruments "doubling" on the same notes,
at the same pitch or in various octaves,
which go to make up a large part of modern
orchestral sound. (They are much rarer in
old music, Mozart and back.) It is true
that close -up stereo recording can separate
the individual strands of these sounds, for
the "de-blend" mentioned above. Woodwinds in octaves, flute doubling strings, a
thousand other combinations, were intended
to sound as one, just as blended organ pipes
play one melody. (The same de- blending
often occurs in organ recording done too
close to the pipes.)
On the other hand, many inner details,
AUDIO
oO
4/A
NAG\\S
064,s
SS
yow
ANO
SONIPPE
THAT
THEM FLLATBU
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RATEO
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track). A-B the results. Yes, you can hear the difference. You can measure
the difference with instruments. Newcomb holds up perfectly ; meets published specs at full rated ouput of 2.5 volts. This gives you a far better signalto-noise ratio. Another feature that makes it possible to get those elusive
highs on tape- Newcomb recorders are built with receptacles for Newcomb
Humfree Plug-in Transformers. So equipped you can use long cords and low
impedance microphones, preserve every tweet, twitter, transient, and overtone. Another feature the pros like Cannon sockets are used for mike inputs.
The Newcomb new Series B models are the most foolproof, most dependable machines in their class. They are also easiest on tape , handle your precious recordings with maternal gentleness. Easiest to operate, too. Cybernetically engineered; operation is intuitive. They are still the only machines
in their class that take 10%" reels, have four -digit counters, pointer -topointer recording level meters, mixing controls for both channels, blend control, ganged volume control, complete preamplification. For the perfectionist.
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Each Newcomb stereophonic tape recorder meets
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RESPONSE
At
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ips
At 3% ips
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OUTPUT
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Average approx.
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2.5 volts from
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Cannon sockets for mike inputs, and receptacles for Newcomb Humfree
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NEWCOMB AUDIO PRODUCTS CO., DEPT.
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LEXINGTON AVE.,
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89
AmericanRadioHistory.Com
though not usually audible in live per formance-at least, at normal concert distances-still are worth hearing and, when
brought forward by stereo, can add unexpected new supra- concert -hall interest.
The musical judgment as to which elements in a piece of music can be brought
forward, made to stand out for extra musical interest, which elements are better
left inconspicuous and in the background,
is the keenest and most demanding sort in
the whole business of recording stereo. The
best stereo records today are those in which
careful judgment of this kind has been integrated with the more usual judgments of
overall "stereo effect."
Now you can go out and buy some of
the dozens of Stravinsky stereo discs that
STILL AVAILABLE!
have been issued to commemorate his 80th
birthday, not to mention plenty more made
by him in person since he wrote the remarks
quoted here. A grand old man, in truth,
and a perceptive audio listener.
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MORE THAN 50 ARTICLES COVERING STEREO RECORDING AND
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RADIO MAGAZINES, INC., Dept. A
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understand that my
Enclosed is my remittance for $
copy of the 5th Auo,o ANTHOLOGY will be mailed to mc.
Use handy order form. We pay postage anywhere in the U.S.
add 508 for Foreign orders
1
Name
Address
City
I
am:
Zone
Engineer
Sludent
Musician
Other
State
Audio Enthusiast
.
l'cu learucdl, (Act' the years, that it is
always the obvious that is least obvious.
Trees that can't be seen because of forests.
Things that lie close under the nose, but
somehow are invisible and maybe unamellable.
Grounds, for instance. A real audio amateur homebody like myself should never
have to think about such matters as grounding. There are laws, rules, prinicplea, and
anybody who knows beans about electronics
should be able to ground what needs to be
grounded with his eyes closed. Ah yes.
And so when my various systems unaccountably provide me with annoying
quantities of hum, I just take it in stride.
One of those things.
On the other hand, my varying assistants
have shown varying degrees of persistence
in their attempts to remove the unremovable. There's gotta be a reason for it, one
of them will say as he sails into my stereo
disc playing system. A couple of hours later
I'll hear him muttering faintly under his
breath -gotta be a reason. As one grows
older, one becomes either more adaptable,
or more cynical. I tend to close my ears
mentally to all such sounds of 60 or 120
cps, and let it go at that.
And yet -once in awhile, a miracle happens. One just did. Since yesterday, a fine
and persistent hum that had been bothering
the lower levels of my subconscious for
no longer noticed it out loud,
months
so to speak -is gone. Utterly gone. Well,
darned near it, anyhow. And I'm sitting
here in bewilderment, trying to get used
to the new sound, out of the same old place.
It isn't that I notice the hum, or lack of it,
concretely. Instead, my mind hears a suddenly cleaner signal. Fresh, newly washed,
like the sound of a new stylus after you
replace the old worn one.
The moral is simple. Hum is hum, but
you can, if your mind is willing, put it out
of your consciousness, like the sound of your
furnace, or air conditioner or refrig. On
the other hand, what you can't do is to
ignoro the intermodulation effects of the
hum upon the music you are listening to
with your conscious ears. You may not
notice the 60- or 120 -cps sound itself
and its persistent relatives. Rather, you
hear a musical sound that is subtly distorted -not continuously, but intermittently
according to the instantaneous combinations of musical signal and hum.
It's easy to adapt to a steady sound, that
does not change. It is next to impossible to
-I
AUDIO
90
AmericanRadioHistory.Com
AUGUST, 1962
r
adjust to a dynamically changing species of
distortion. That's the worst thing that a
slight hum does to good music. It does it
even when the hum seems to be drowned out
by the overriding musical signal. So-get
rid of the unheard hum and you hear a
cleaner musical sound.
How many pickups, loudspeakers, radio
tuners, tape recorders, have been unknowingly misjudged on this basis? Plenty,
I'll bet.
Add this to my moral: there are some
nice and practical home -style hum removers
that ought to be mentioned, if only for the
record. Some are professional, most are
strictly amateur-and just as good.
Yesterday, for instance, we wrapped a
whole strip of high- impedance terminal
board contacts with some sticky cloth tape,
then crunched a hunk of Reynolds' best,
standard aluminum foil for sandwiches, on
top of the sticky stuff. Grounded it with a
few twists and another hunk of sticky stuff
to keep it in place. (I used to wind lengths
of rosin -core solder around exposed "hot"
leads, as a temporary and very effective
ground. Temporary for years, of course.
Not as good as foil.)
Everybody knows that tin cans make
fine shields, but not enough people use
them. A much easier and less corrosable
material is the aluminum pie plate. Worth
buying a brace of frozen pot pies, just to
get hold of the stuff. It is much stronger,
of course, than foil, and will sustain a physical load nicely, keeping its shape after a
fashion.
Then, on a somewhat more professional
level, there is the kind of conducting tape
that is sticky on one side and metallic -conducting on the other. I have hanks of this
on hand, in case I run out of tin cans.
But look out for ordinary "silver" tape.
Even that shiny Xmas sticky metallic
wrapping tape isn't too trustworthy. It
may turn out to offer a nice insulating plastic surface, over the metallic shine. Get
the pro stuff, then, and use it liberally on
phono connections and such that are exposed and unshielded.
Somewhere, of course, you'll connect all
this sticky and crunchy stuff to ground
to the ultimate ground, if you have several
levels of grounding. (We all do in stereo.)
That's a different problem. There, my present solution, for example, is a piece of old
bell wire that runs from my phono chassis
to the preamp chassis. It wake. (Most
arms now provide an extra grounding wire;
but you may have to hook the motor itself
to your ground system as well.)
My newest wrinkle in shield- ground materials is expensive and I haven't got to try
it very extensively yet. I bought a small
bottle of it for a large price, out of sheer
curiosity. Conducting "silver" paint.
Yes, it looks rather like a poor quality of
ordinary silver or aluminum paint, with a
dirty brownish cast to it. You would not
think it could conduct. Most metallic paints
don't. Each little bit of metal is neatly surrounded by a sea of liquid insulation that
cures to solid insulation. Hence, I suppose,
the cost of the conducting variety. It should
be worth it. Use it for painting a fine
coating of non-insulator over all sorts of
things that need plain metallic shielding.
But look out for liquid shorts! They
can be nasty. Liquid solder at least is hot
and warns you when it is about to pour
where it oughtn't to pour. Conducting paint
will slither any old place and you can't
wipe it off without leaving a subtle resistance -leak behind. It spreads, it infiltrates. And a cold liquid short that turns
into a viscous-solid one is apt to be your
last straw. Throw out the equipment and
get new. Probably about time, anyhow. ATE
-
AUDIO
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81 Spring Street, New York 12, N. Y.
91
AUGUST, 1962
AmericanRadioHistory.Com
115/64" dia., 5 7/16" long; weight 1 lb;
type of mounting stand. Price, $135.00. Shure
Bros., 222 Hartrey Ave., Evanston, Ill.
PRODUCT PREVIEW
SONOTONE
SECTION
(from page 76)
PEARL
Professional Condenser Microphone Series. This microphone meets studio specifications for noise, sensitivity, and directivity,
Polar pattern changed from cardiold to (figure
8) bidirectional with flip of switch. Directly.
ity : cardloid 15-20 db, bidirectional 20 -25 db.
Specifications: Type condenser; dir. pattern
cardiold and figure 8; diaphragm material
gold foil; case metal; finish chrome; output
impedance 200 ohms ; freq. resp. ± 2.5 db from
20 to 20,000 cps; sensitivity 45 db cardloid,
48 db bidirectional ; cable connection Cannon ;
length of cable furnished 20 ft ; type of plug
Cannon XLR ; dimensions 5" + 29/32" ; other
features : S/N at 2k cps -65 db cardioid, 58
bidirectional; sound volume range, 107 db
cardloid, 111 db bidirectional. Price $269.00
Accessories: Type 3000 power supply, $125.00
Ercona Corp., 16 W. 46th Street, New York
C8
Matched Microphones.
Introduced for
stereo recording, Sonotone paired "Ceramikes" are acoustically matched at the factory to a tolerance of 2.0 db. Plugged into
any quality stereo recorder, the CM -T10A
feeds the tape a substantially flat signal. The
heart of every Ceramike is a rugged, rubber encased ceramic transducer which is immune
to extremes of both temperatures and humidity. Controlled response is assured by an all metal damping grid of a new design. The
one -piece die -cast metal case is designed for
easy hand use. For table and floor use there
are matching stands.
36, N. Y.
1.
Model C -K cardioid and
omnidirectional
$260.00
Model C -I2 (cinema type bass and
treble attenuation)
250.00
3. Model ST -6 stereo
695.00
4. Model C -2 omnidirectional
259.00
2.
The perfect companion
for
professional recording
Foster's dynamic DF -1 is an omnidirectional bar -type microphone for both
professional and home use. This versatile
mike weighs only '/á lb. including cord,
and is just 31/4" long and 7/8" in diameter.
Yet it has a range of 100 to 12,000 c.p.s.
and sensitivity of 58dB 150 KQ, ±3dB
at 1,000 c/s (OdB= 1V / /tbar). Your
choice of 600 ohm. 10,000 ohm, or 50,000
ohm impedances.
Rugged and precision made, the DF-1
assures professional results right in your
living room. Used with hi -fi, stereo, or
tape recorder it faithfully recreates a
broad band of audio frequencies -and
takes up less space doing it. The DF-1
can be hand held, suspended from its
neck cord, or clipped to your lapel. A
strong diecast frame gives it complete
protection for long trouble -free service.
You can get this
outstanding all -new
microphone now at
popular prices. For
further information
write directly to the
address below.
FOSTER ELECTRIC CO., LTD.
384 Shimo- Renjaku, Mitaka, Tokyo, Japan
CABLE FOSTERELECTRIC MUSASHINOMITAKA
:
Specifications: Type ceramic; dir. pattern
diaphragm material ceramic; case
metal ; finish satin ; output level 58 db ± 2db
freq. resp. ± 2 db from 50 to 11,000 cps ; length
of cable furnished I ft ; type of plug phone;
mounting swivel stand. Price $36.75 (matched
pairs). Sonotone Corp., Elmsford, N. Y.
omni ;
SCHOEPS
Professional Condenser Microphone. The
Schoeps CM -66 is designed with a patented
multiple-pattern single diaphragm made of
metal ; pattern switching is achieved by altering the acoustical chambers behind the diaphragm. The switchable 15-db attenuator between the capsule and the preamplifier pre-
vents overloading and distortion.
Specifications: Type condenser; dir. pattern
cardiold, ornai, figure 8 ; diaphragm material
solid nickel ; case matte satin chrome ; output
impedance switchable 30/50, 150/250 ohms;
freq. resp. from 50 to 19,000 cps ; cable connection Cannon .t'LR -3 ; length of cable furnished 33 ft. Price $45.00. Accessories: with
AGO elastic suspension (shown) $470.00. International Electroacoustics, Inc., 333 6th
Ave., New York 14, N. Y.
1. M221/26 condenser mic
2. CM 640 condenser mic
3. M221/24 condenser mic
4. EST 60, M -S stereo adapter
$460.00
415.00
440.00
84.00
SHURE
Unidirectional Microphone. The new Shure
Model 546 "Unidyne III" was developed primarily for the broadcast market but is also
ideal for top -quality public address installations and recording. The Unidyne III features
vibration isolation, improved performance, and
a Cannon connector.
1.
2.
CM -11A, matched pair
CM -12A, low Z
$36.75
29.50
TURNER
New Microphone Series. The Turner 400
Series are broadcast type microphones which
feature adjustable impedance and response.
All four microphones in the Serles (401, 402,
403, and the 404) are wide- response movingcoil dynamics and essentially non -directional.
They can be mounted on % " -27 desk or floor
stand. Positive grip camlock allows instant
insertion or removal of microphone without
disconnecting. Adapter supplied.
Specifications: Type dynamic ; dir. pattern
omnidirectional ; diaphragm material dynaflea plastic ; case aluminum ; finish chrome
epoxy ; output impedance hi or 150 ohms ;
freq. reap. from 40 to 20,000 cps ; sensitivity
60 db below 1 v /microbar ; cable connection
3 -pin Cannon insert ; length of cable furnished
20 ft. ; type of plug XLR3110 (Cannon) ; dimensions : 10% inches x 1 -3/16 ; weight 7 oz.;
type of mounting positive grip stand ; other
features : The Model 401 has a screwdriver
frequency-cutoff adjustment. Price, $125.00.
Accessories shock mount desk stand #4022
$8.00. The Turner Co., 1909 17th St., N.E.,
Cedar Rapids, Iowa.
1. 403, P.A. version
$ 80.00
2.
3.
220A, Lavalier
58. Lavalier
125.00
57.00
UNIVERSITY
Model 401 Professional Omnidirectional Dynamic Modular Microphone. A professional
Specifications: Type dynamic ; dir. pattern
oardioid; case zinc; finish satin chrome and
black; output impedance 30 -100, 100 -250
ohms; freq. resp. from 50 to 15,000 cps; output 55 db ; cable connection 2 conductor
shielded; length of cable furnished 20 ft.;
type of plug Cannon XL -3 -11
;
dimensions
:
dynamic microphone featuring exceptionally
wide and smooth characteristics and application flexibility. Five different adaptors enable the 401, as well as the other three
modular microphones (4025, 501, 502S), to
meet almost any recording or broadcasting
application requirements in seconds. No tools
are required. Adaptors screw on and impedance change is effected by means of
simple push -on connectors.
Specifications: Type dynamic ; dir. pattern
omni- directional; diaphragm material polyester film ; case, Zamac Alloy, finish gray and
matte black; output impedance 30/50;
150/250; 20,000 ohms; ire. resp. from 30 to
20,000 cps ; sensitivity (Lo Z) 55 db /Imw/
10 µbar ; cable connection Amphenol or Can-
AUDIO
AmericanRadioHistory.Com
AUGUST, 1962
and a specially designed Vega receiver to pick
up the signal from the transmitter. Prices :
Lavalier or hand -held Vega -Mike michophonetransmitter with receiver, $517.50. Vega
Electronics, 1078 N. Highway, Cupertino,
Calif.
BEYER
DT-48 Dynamic headphones. These are one
of the highest priced and highest performance
phones on the market. They are used primarily by research laboratories and audiometer
users. They are now available for hi -fi use
with new cup -type cushions.
Specifications: Response : 16 to 18,000 cps ;
sensitivity 114 db /mw above 2 x 10-, micro bar at 400 cps : impedance : 5 ohms each side
in stereo, 10 ohms mono ; weight : 360 gram;
maximum power handling, approx. 800 mw or
1 volt ; voltage requirements approx. 8.5 my
per side; cushions, cup type C -48e (fiat type
C-48 on request). Price $79.50. Accessories :
TR -48 bridging transformer for 600 -ohm lines
complete with plugs. Price $18.50. Gotham
Audio Corp., 2 West 46th Street, N. Y., 36,
:
HEADPHONES
AKG
N. Y.
Dynamic Headphones. K -50 headphones are designed for high quality mono
stereo
applications. The K -50 is easily
and
connected to the voice -coil terminals (or to
preamplifier outputs of the cathode follower
type, with the U -50 transformer). The diaphragm system of the K -50 is designed for
no overshoot, no doubling, and no disturbing
resonances. The headphones are lightweight,
for no listening fatigue, and rugged, for long
life. All components are also given tropic H -50
non plugs ; length of cable furnished 18";
type of plug tinned wire termination; dimensions : 1'e dia. x 6 %" long; weight 8 lbs. :
type of mounting permanent or slide -on stand
with adaptors. Price, $43.50. University Loudspeakers, 80 South Kensico Ave., White Plains,
N. Y.
1. 4025, omni dynamic modular
2. 501, cardioid dyn. mod.
3. 5025, cardioid dyn. mod.
4. 403L, television dyn. omni lavalier
5. 404L, broadcast dyn. omni lavalier
$47.70
75.00
87.00
52.50
57.00
VEGA
f.
Vega -Mike Wireless Microphone System.
The user of n Vega-Mike wireless microphone
system has complete mobility to walk freely
anywhere in the auditorium, even out into
the audience with no trailing cable yet have
every word amplified through the PA system,
captured by a tape recorder, or channeled to
a control board. A basic Vega-Mike wireless
microphone system consists of a lightweight
one-piece microphone -FM transmitter units,
resistant treatment.
Specifications: Impedance 15 or 200 or 400
; range 30 through 25,000 cps ; sensitivity
0.156 milliwatt per unit for output at ear of
95 db SPL; max undistorted level 127 db SPI.
at input of 90 milliwatts (4.25 volts rms) ;
4 wire cable, tinned ends; unterminated 6.5
ohms
ft. long leads. Ear cups clear plastic; .1.85
; impedance of each either one
half or double by connecting terminals in
series or parallel. Price $88.50. Ear cushions
for exclusion of extraneous noise, Z-50, per
pair $1.80. Electronic Applications, 194 Rich-
oz. net weight
mond Hill Ave., Stamford, Conn.
I. AKG K -58 boom headset featuring
DK58 microphone plus choice headset
impedance,
balanced
or
unbalanced
microphone output cable
$4'.P0
1. DT -508s,
lightweight twin
dynamic
2. DT -507, miniature,
dynamic
phones,
$
27.50
hearing -aid type,
12.85
JENSEN
HS -1 Stereo Headphones. Jensen IIS -1
stereo headphones offer advanced features
which contribute to acoustic performance and
comfort. The moving coil driver units are of
a new special design, matched to close tolerances for accurate stereo balance. Exclusive
fluid damping of moving system yields su-
perior response smoothness. Protective screens
cover the diaphragms. Cases are marproof,
breakage -proof nylon. Contoured soft cushions
will retain their resilience and ability to
achieve a close fit without pressure sensation
indefinitely ; they may be removed for cleaning. Yokes and headband springs are stainless steel. Ear cups rotate both horizontally
and vertically for precise accommodation to
the bead. A total headband adjustment of
4 %" is provided (2 %" each side). Cord comes
out one side -you don't get tangled up. For
convenience in wiring, an accessory jack panel
is furnished. When used, an input of approxl-
WORLD TRAVELER, ALL CLASSES
VIENNA
C -60 Miniature Condenser
Microphone System is travelling all classes everywhere with the B -60
Now AKG's
Transistorized Power Supply.
Time was when a condenser mike was
studio -bound. But AKG has liberated
this highest-class microphone from
the AC outlet. B -60 is at home wherever needed. Slung smartly over the
shoulder it weighs less than many a
telephoto lens, and includes space
for the microphone and cables.
C
-60/
B -60's
versatility
is guaranteed
by the quick change -over from cardioid
to omni capsule. In seconds you can
get the "musici," the pigeons alone,
or the atmosphere of the whole Piazza.
If you make ethnic recordings, or
sound tracks, or background music for
make sure
business or pleasure
C- 60 /8-60 is entered in your passport.
Its studio condenser quality makes a
Tourist -Class recorder sound like First!
-
No
other studio -quality condenser mike
is so small, so light, so travel -wise, so
inexpensive. The mike, with cable and
power supply, fit in a leather case
smaller than 3 x 4 x 6 inches. On a
neckstrap you have no baggage burden. C -60 mike, B -60 Power Supply,
L -60 Charger, $259.50.
For data and name of the AKG dealer
nearest you, write V. J. Skee at Electronic Applications, Inc., Wilton, Connecticut. Or phone 203-P02 -5537 (TWX
WILT 426).
(In Canada, George McCurdy, Radio Industries Ltd., 22 Front Street West, Toronto).
AUDIO
93
AUGUST, 1962
AmericanRadioHistory.Com
exclusive in LSJ.
BRITISH PRECISION WORKMANSHIP
GUARANTEES
FINEST HI -FI REPRODUCTION
Fi/riritiqe
out
Ir;,usioruiìers
The secondary is brought out as four separate sections which may be connected in series
or parallel to match speaker impedances of 0.95, 3.8, 8.5 and 15 ohms by this arrangement.
Each half primary is brought out to terminals as separate windings and is tapped for ultra
linear performance. Latest grain orientated cores. Fully interleaved.
Series -for use in
Available in 4 models
Model
5200
20
:
or 35 watt amplifiers with distortion less than 1%.
Plate to Plate Load
P5201
9 -12K
P5202
7- 9K ohms
43°%
P5203
3- 7K ohms
43%
P5204
3- 5K ohms
20 %
5300 Series
Available in
-for
4
:
Tapped At
ohms
43
°/o
$3000
NET
KOSS
Tapped At
P5351
9 -12K
ohms
43 °/°
P5352
7- 9K ohms
43 %
P5353
5- 7K ohms
43
°/o
P5354
3- 5K
ohms
20
°/o
$3500
NET
ULTRA ELECTRONICS, INC.
235 EAST 60th ST.
NEW YORK 22, N.Y.
CIRCLE 94A
The First Book of
its Kind -No Other Like It!
SOUND in the THEATRE
by Harold Burris -Meyer and Vincent Mallory
Nothing like SOUND in the THEATRE
has ever been published. It is the first
book to set forth in authoritative detail what
you can do with sound by electronic control,
and how to do it whenever the source (singer,
musician, speaker, etc.) and the audience are
present together. The book develops the requirements for electronic sound control from
the necessities of the performance, the characteristics of the audience (hearing and psychoacoustics), and the way sound is modified
by environment, hall, and scenery. Sound
sources are considered for their susceptibility
of control and need for it, and the many tech niques for applying electronic sound control
are described and illustrated in thirty -two specific problems. From these problems are de-
rived systems and equipment specifications.
Complete procedures are given for: Planning,
assembling, and testing sound control installations- Articulating sound control with other
elements of production Rehearsals and performances Operation and maintenance of
sound control equipment.
-
-
THE AUTHORS
During the past thirty years, the authors have developed
the techniques of sound control in opera, open-air amphitheatres, theatres on Broadway, theatres on-the -road and
off- Broadway, in concert halls and night clubs, in Hollywood and in the laboratory. Some of their techniques are
used in broadcast and recording as well as in performances where an audience is present. From their laboratory
have come notably successful applications of sound control to psychological warfare and psychological screening.
RADIO`
MAGAZINES, INC.
An
Mineola, New York
I
am enclosing my remittance for 51040
of
SOUND in the THEATRE postpaid.
Send my copy
`
invaluable reference
an
in
dispensable guide for anyone
working in the theatre a complete technological thesaurus for
the engineer, architect, designer,
technician, student, and teacher
concerned with the renforcement
Professional Headset, Model Pro -4. The
Professional Headset Is engineered to meet
the most rigid requirements. It is very rugged, shatter- proof, and shock- proof. Fluid
tilled ear cushions are designed to fit head
contour and thus form a more perfect seal.
Specifications: Freq. resp., 30 to 20,000 cps;
maximum input. 10 watts per channel, 60
watts per channel of normal music program
source ; distortion, less than 1e/r nt maximum
output of 125 db S. P. L. ; impedance, 4 ohms ;
cord 8-ft. four-conductor ; removable cushions
can he cleaned with soap and water. Equipped
for boom mike attachment. Price $4 :1.00.
Koss Electronics, 2227 North 31st., Milwaukee, Wisconsin.
1.
SP -3,
stereophones
2. SP -5NS, dual -mode stereophones
3. SP -5SM, stereo /mono stereophones
4. SP -5VW, dual -input stereophones
PERMOFLUX
Headphone Series. Available in a variety of
impedances, the Permoflux DIIS series of
binaural headphones achieve the full depth
and presence available in binaural sound.
The close coupling of the earspeakers eliminates the adverse factors of improper room
acoustics and poor speaker placement. Available with several styles of ear -cushions, the
DIN series Is adaptable to a wide variety
of circumstances. In addition various adapters
are available which permit connecting up to
four sets of headphones to one program
source. Permoflux Products Co., 4111 San
Fernando Road, Glendale, Calif. User net
price, $42.50- 52.50.
PIONEER
Stereo Ileadgua,ItIv
Usable for either
stereophonic or monophonic listening, the
Pioneer Model SE -1 features foam ear pieces,
which are comfortable and also provide an
excellent seal. The lightweight ear pieces
and padded headband are completely adjustable to give a "custom fit" for utmost comfort. Only one conveniently long plastic cord
is attached to the earphone. The cord is
terminated in a final plug which may be
plugged directly into the source, or into a
four -way switch box connected to the speakers.
This switehbox is provided. Impedance is 8
to 16 ohms. Monarch Electronics International Inc., 7035 Laurel Canyon Blvd., N.
Hollywood, Calif. User net price $19.95,
REALISTIC
Stereo Headphones. For home use. The Realistic stereo headphones have 8 -ohms impedance, frequency range from 20- 20,000 cps,
and possessions, Canada, and Mexico.
Add 50e for Foreign orders.)
None
AUDIO
Address
Ions
$24.95
24.95
24.95
24.95
of sound and speech
(No C.O.D., all books sent postpaid in U.S.A.
Chi
CC -1, stereo headphone control center $39.75
-I, headphone cross -feed network 19.50
use in 35 to 50 watt amplifiers with distortion less than 1%.
Plate to Plate Load
Dept. AG -1
Post Office Box 629
1.
2. CFN
models
Model
`
ntntely 1 watt per channel to the Jack panel
is required and improved signal-to-hum ratio
is provided.
Specifications:
Drivera- high -compliance,
curvilinear, moisture resistant with Alnico
magnet. Frequency Range : 20- 15,000 cps
Power Requirements : 1/10 milliwatt. Impedance
s ohms each channel (may be connected to 4, 8 or 16 ohm amplifier outputs).
Sensitivity 95 db sound pressure level for 1
milliwatt. Plug : standard .4 contact headphone plug. Cord 8 ft. long. Net weight : 16 oz.
Jensen Manufacturing Company, 6601 S.
Laramie Avenue, Chicago 38, Illinois. User
net price 824.95.
stale
AmericanRadioHistory.Com
AUGUST, 1962
3
`
N0
S
SQP
BASIC
silicone- rubber ear cushions, and a spring steel
headband covered with wear -resistant fahrie.
Price S14.95. Radio Shack, 730 Commonwealth
Ave., Boston 17, Mass.
SPECIFICAT ION
"Monitor" Dual Conceal. is
Models
10 ", 12 ", and 15"
E. J. SHARPE
Stereo Phones. Featuring a response from 20- 20,000 cps flat from 30 to
10,000 cps ± 3 db. Noise -excluding ear pieces
to remove outside disturbance. Plastic and
metal construction to permit cleaning. Fits
around ear rather than on the ear reducing
fatigue. Price $43.50. E. J. Sharpe Inst. Co.,
965 Maryvale Dr., Buffalo 25, N. Y.
H.4-10
TELEX
ST -10 Stereo -Turin Headset. The Telex
Stereo-Twin headset has been specifically designed to provide exceptional stereo private
listening for the music lover. The rugged
construction will provide years of listening
enjoyment while allowing ample adjustment
for maximum comfort and ambient noise
rejection. Deluxe foams rubber cushions provide a superior acoustic seal even when wear fug glasses. The Stereo -Twin is designed to
provide maximum performance when connected to an amplifier output impedance of
4 to 16 ohms: 16 to 15,000 cps frequency response; two watts maximum power input;
weight 13 oz. High yield- stress spring -type
stainless steel headband, sleeved for maximum
comfort. Price $40.65. Telex, Inc.. 1633 Eustis
St., St. Paul 1. Minn.
Frequency response
.10- 20,000 cps ± 3dB
Polar Distribution for
60° inc. angle
at 10,000 aim
- 4dlt
TAN Hoy/
Write for full details.
TANNOY (CAN .ND'
High Fidelity speakers
need not and should not be
complicated. They must, however, be designed as complete systems
including the enclosure rather than be a
collection of individual units and cross -over
networks, with the increased possibility of error
and the lack of necessary equipment for tests
in the home when finally assembled.
Few people would obtain a motor-car by buying the
engine, chassis, body etc. and assembling it at
home. They would rightly regard this as a job for
expert engineers -and so with loudspeakers, where
naturalness not novelty is the desired result.
DUAL
CONCENTRIC
SPEAKERS
TANNOY (AMERICA) LTD. P.O. BOX 177, EAST NORWICH, N.Y., U.S.A.
WELLINGTON STREET F SST. TORONTO 1, ONTARIO, CANADA
1.1 D. 36
CIRCLE 95A
TURNER
Model 270 ]headset with Optional Boom
Microphone. Moving coil dynamic phones are
used on the Turner Model 270 Headset to give
the user the finest possible reproduction of
voice and recorded music. The Model 270 is
available with S -ohm, 250 -ohm, and high -im-
(4yet)//
.j /0i!(1(í
(Yibü,iiir// ..
The new look in "bookshelf" speakers. Place
pedance phones. The Model 270 headset has a
flat response from 30 to 9000 cps, with good
fidelity for an extended range up to 13,000
cps. The moving -coil phones have diaphragms
of "dynaflex" plastic. Twin headbands are designed to accommodate modern hairdo's and
to he more comfortable than single-band units.
Price, $35.00. The Turner Co., 909 17th St.,
N.E., Cedar Rapids, Iowa.
AUDIO
a
.
speaker on each end,
amplifier and tuner on the adjustable shelf, and your components are transformed into a striking stereo cabinet which will highlight every interior and
accent your fine components. Naturally, crafted from the finest of hardwoods
in a choice of finishes. see your dealer or write for free brochure of the complete line.
audio
Originals
SOUTH MERIDIAN
474
STREET
INDIANAPOLIS 25, INDIANA
CIRCLE 955
95
AUGUST, 1962
AmericanRadioHistory.Com
frequency, 500 cps ; dimensions : 8" wide, 534"
high, 2%" deep ; weight, 12 lbs. Price, $60.00.
Altec Lansing Corporation, 1515 S. Manchester Ave., Anaheim, Calif.
1. 800E dividing network, 800 cps
$46.50
2. 30006 dividing network 3000 cps
2230
MISCELLANEOUS
ACOUSTIC RESEARCH
AMPEX
Ampex 500 Series Magnetic Recording Tape.
Ampex 500 Series is a premium quality
audio recording tape with exclusive Ferro Sheen oxide surface for maximum frequency
response, clean operation and low head wear.
It is available on 5- or 7 -inch plastic reels and
is for semi -professional and first -rate home
recording. It is designed for optimum performance on Ampex recorders. An Ampex
"Signature Binding" and gold foil title tab is
included with each reel of Ampex tape so the
finished recording will have an attractive library binding with a personalized title. Price
varies. Ampex Corporation, Magnetic Tape
Products, 934 Charter St., Redwood City,
AMERICAN
Idle Force Gauge. Balance type, with
weights to r4 gram. Accuracy ± 5 per cent.
.\
New Professional Length. American's new
Price $ 1.00.
Professional Length breaks existing tape traditions by offering up to 25% more tape on
the standard 7 -inch reel. American's new
"Professional Length" will increase 1 % -mil
acetate to 1500 feet. 1 -mil acetate to 2000
feet, 1 -mil mylar to 2000 feet and s4 -mil mylar
to 3000 feet. The purpose of course is to
offer the tape -it- yourself customer an opportunity to record more music on a 7 -inch reel
of tape regardless of the base material he
prefers. The new Professional Length will retail for the same price as other quality tape
of standard lengths. Greentree Electronics,
ALTEC
500D Dividing Xctu,rk. Designed for use
with 802 h.f. driver and 511 horn, the 500D
has smooth 12-db- per -octave slope. Externally
mounted high- frequency shelving control has
four steps of 1% db for precise adjustment to
individual room acoustics.
California.
I. Ampex -Irish 300 Magnetic Tape, economical
quality.
AMPLIFIER CORP.
" Magneraser" Model 2000 and 220G.
Los Angeles, Calif.
AMPEREX
Type 60W8 /ECL66 Triode Pentode. The
Amperex 6GW8 /ECL86 is a triode-pentode
with separate cathodes. The pentode section
is designed for audio output in audio amplifiers or TV receivers. The triode section is
suitable for amplification in these applications
using a supply voltage of around 250 volts
for both sections.
Specifications: Heater voltage, 6.3 V. ; cur.
rent, 700 ma ; Naval base, T6% bulb, height
2 13/16" seated. Pentode section : 300 v. max ;
dissipation, plate, 9 watts, screen, 1.8 watts;
cathode current 55 ma. Typical operation,
plate -to -plate load, 9100 ohms, power output
14.3 watts per pair. Triode section : 300 v.
max, dissipation, 0.5 watts ; voltage gain 66
to 80. Amperex Electronic Corporation, 230
Duffy Ave., Hicksville, L. I., N. Y.
1. 6BQ5/EL84, med pwr output pentode .$1.30
2. 6CA7 /EL34, high pwr output pentode
2.90
3. 5AR4/6Z34, power rectifier
2.20
4. 12AU7 /ECC82, med gain dual triode
1.23
.
Specifications: Impedance, 16 ohms ; h.f.
attenuation, 6 db in 1 % -db steps; crossover
5.
12AX7 /ECC83, high gain dual triode
1.28
De-
signed to serve a dual function, the new
"Magneraser" completely erases tape on the
reel, without rewinding, and also demagnetizes
record -playback and erase heads. Wear and
tear on the tape and equipment is reduced
because erasure is effected on the reel.
Specifications: Switch, momentary, pushbutton. Field intensity 800 gauss. Line voltage,
117 volts nominal. Power consumption 60w.
Current 3.05 amperes. Power factor 0.12. Construction, bakelite case. Size : 2r% -in. high x
4 -in. diameter. Weight 3% lbs. Model 200C
for 100 -130 v; Model 220e for 200-260 v.
Price $18.00. Amplifier Corp. of America, 396
Broadway, New York 13, N. Y.
ARTISAN
"York" Two-manual Organ Kit. Although
only 25" deep and 50" wide, the York offers
more features than are found in any other
organ of similar size full 61 -note manuals,
25 -note concave pedal keyboard, dual expression pedals, and 40 stops -plus the authentic
sound of a giant organ. The handsome theatrestyled console with "horseshoe" stopboard and
multicolored atop tablets is impressive in any
:
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Now you, your
Boost Performance and Sales Appeal
Improve product design. Add operating convenience.
Cut production time and costs. Stackpole Slide
Switches do the trick. Available in over 15 basic
types, they give you ratings and features to meet your
needs in appliances, power tools, electronic devices.
friends and co -workers can save $1.00
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Maintained or
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momentary contact.
Priced from $.039 each.
11 Attractive Knob Colors.
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1 to 4 poles
to 4 positions.
types.
Lug, printed circuit, or Quick Connect terminals.
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AUDIO
96
AmericanRadioHistory.Com
AUGUST, 1962
u
Hear the newest stereo development
setting. It can be purchased in a complete
2- manual kit, or started with a single manual
and later expanded. Prices start from $1500
to $2250. Independent oscillators are employed on every key of every manual and even
in the pedal. This achieves a rich chorus tone.
Artisan Organ Division, Electronic Organ
Arts, 4949 York Boulevard, Los Angeles 42,
The Omega all- transistor FM /multiplex tuner
and 60 -watt stereo amplifier ...
Calif.
1. "Concert,"
You'll thrill to breath -taking concert hall reproductions with the
totally -new all -transistor Omega FM /Multiplex Tuner and 60
watt Stereo Amplifier. These solid -state units represent a major
"breakthrough" in electronic design. Exclusive transistor circuitry eliminates disturbing tube hum, microphonic noise and
excess heat. Meticulously engineered, Omega provides you with
flawless sound. The amplifier develops a full 60 watts (30
watts per channel) ... the tuner gives you positive channel
separation for unmatched stereo enjoyment. Other performance
and styling features will also delight the most discriminating
audiophile.
For complete information. contact your local Omega dealer or
write directly to Omega.
3- manual organ
kit
$3500 to $5500
2. "Regal," small 3- manual organ
1750 to 3750
kit
3. "Theater," 2- manual horseshoe
1750 to 3000
console organ kit
AUDIO DEVICES
AUDIOTAPE for Magnetic Recording: Audiotape has an improved, bright new package
design with eight distinct colors being used to
identify all eight types of Audiotape. Simple
and direct product descriptions are combined
with the color-coding technique making Audio tape type selection easier than ever before.
New Audiotape nomenclature includes: Standard Recording, for 1% -mil base materials;
Longer Recording, for the 1 -mil base materials ; Double Recording for the %-mil base
materials ; and Master Recording for tapes
with special low -print- through oxide formulations. New products added to the Audiotape
line include packaging on 5 % -in. reels and
tapes with Colored Leader Reversal Strips for
use on automatic stop -reversal machines. Audio Devices, Inc., 444 Madison Ave., New
York 22, N. Y.
AUDIO ORIGINALS
Model 303 Equipment Cabinet. Concentrating on designs for the compact speaker, Audio
Originals has created a series of designs
which will accommodate a variety of standard
components in an over -all integrated design.
This Scandinavian design features convenient
pull -out changer or turntable shelf, two adjustable component shelves, space for hundreds of records and a tape deck too. It is
721/2-in. long, 32'x. -in. high and 16-in. deep.
The speaker compartment is 25% x 16 %. The
Model 303 is available in oiled Walnut, Mahogany, Cherry and Fruitwood. It is shipped
knocked down and assembles in minutes. It
weighs 85 pounds. Price S99.50. Audio Originals, 474 S. Meridian, Indianapolis, Ind.
$69.50
1. Model 202 Stereo Cabinet
BOZAK
N -10102 Convertible Crossover Network.
The N- 101112 is convertible for 8- to 16 -ohm
three -way speaker systems with 6-db- per-oc-
tave crossovers at 800 and 2500 cps. It is non-
OMIleg l
ELECTRONICS CORPORATION
10017 North 19th Avenue
Phoenix 21, Arizona
Have You
Hear
Th
Matching Stereo Hi -Fi Speaker System
on all four
hr Playmate is beautifully styled in Walnut Finished Veneer. Finished
permitting vertical or horizontal use and specially dimensioned for Book
Shelf, Highboy or Lowboy Floor installation. It is ideal for use as a single unit by
itself, perfect in pairs for stereo or as an addition to your present system. Truly
superb performance, compact, in tasteful design to compliment in quiet elegance.
I
sides
i
o
l
SHAMS
-25le,
4"
Tweeter!
Speakers and 1 The Plrtlniate is specially designed %%ith matched \\ ulcr. Midrange
and Tweeter Speakers plus suitable Crossover. Full base n-panse
to below 40 c.p.s. tcitli clean and clear brilliance tu 18,000
c.p.s. Capacity 25 watt- Impedance 8-16 ohms.
Equipped with 2
-
YISII110aI
AUDIO
...
6"
1753 W. DIVERSEM PKWY.
CHICAGO 14, ILLINOIS
SEND COUPON FOR COMPLETE DETAILS ON NEW PLAYMATES
AND OTHER HI FI SPEAKERS
WILDER Engineering Products
Name
Strait
City
-
Zone
State
97
AUGUST, 1962
AmericanRadioHistory.Com
ringing and causes no peaks or "holes" in
NEW... FROM
FAIRCHILD
1
MODEL 663
(59
COMPACT COMPRESSOR
Now you can have
a compressor for every
mike channel with this miniature low cost
Fairchild Compact Compressor... no larger
than a slide type attenuator (actual size
12x7x42 inches). This Fairchild Model 663
Compact Compressor will provide up to
20 db of compression with no increase in
distortion. And the attack time of 40 milliseconds with a variable threshold and
variable release time of .3 to 7 seconds
offers complete compressor flexibility and
performance. The Fairchild 663 Compact
Compressor can be easily integrated into
your present console to provide the ultimate answer to all level control problems.
Fairchild Model 663: $158.00
Write today for complete details
FAIRCHILD
RECORDING EQUIPMENT CORPORATION
10-40 45th Ave., Long Island City 1, N. Y.
CIRCLE 98A
CROWHURST
BURSTEIN
FIDELMAN
the experts help you
get the most out of hi -fi
by Norman
It. Croirhurst.
" . a detailed desc.
standards For FM stereo broad.
casting
ELECTRONIC waal.D. __'T_. 51.50.
STEREOPHONIC SOUND (2nd Ed.) "... valuable to
those who like their 'fidelity' high and 'realistic'"
ELECTRONICS WORLD. $209. $2.90.
BASIC AUDIO, 3-VOLUME LEARN BY PICTURES
COURSE
experimenters and more experienced
hobbyists will find no other syllabus more richly
informative or authoritative." -- HIGH FIDELITY
MAGAZINE. 3 vols., soft covers, #201, $8.70; cloth,
#201 -H. $9.95.
ha Herman Burstein
FM STEREO MULTIPLEXING
rlptlon et the
...
FCC
"...
GETTING THE MOST OUT OF YOUR TAPE RECORDER
Written for the
his language
field."
-
f tape recorders, in
...indeed a contribution to the audio
DESIGN NEWS.
p2I.
$4.25.
FUNDAMENTALS OF HIGH FIDELITY. Tells you how
to scic.t the best equipment for the money and
achieve the bast performance from it. #226, $2.95.
REPAIRING HI -FI SYSTEMS by David Fidebnan.
Save owner' "Deals authoritatively
.
with test
gear and techniques, the major troubles encountered in various system components."
- HIGH
response. Price $27.50. R. T. Bozak Mfg. Co.,
P.O. Box 1166. Darien, Conn.
1. N -103 network, 16 ohms, crossovers
at 400 and 2500 cps
$37.50
BURGESS
Burgess Magnetic Recording Tape on the
new 1500' "LP heel." Burgess Magnetic recording tape on the new 1500' "LP Reel," is
just the right amount of tape to record both
sicles of an LP record on one side of the tape
at 7% fps. Thus it is possible to get two
..mplete records (four sides) on one reel of
(ape. This tape Is one of a complete line of
magnetic recording tape. 150-15 (1 mil, extra
play Mylar), Price $5.15 ; 190-15 (1 mil extra
play plastic) $4.50. Burgess Battery Co., Magnetic Tape Div., Freeport, Ill.
CBS LABS
STR 100 Stereophonic Frequency Test Record. Detailed instruction In two parts permit
use of this record by audio engineers as a
laboratory tool or by high fidelity enthusiasts
for evaluating and adjustment of complete
phonograph reproducer system.
Specifications: Separate test bands measure sweep frequency response ; spot frequency response (includes voice announcements) ; channel separation ; tone arm, cabinet, and loudspeaker resonance ; wavelength
loss and stylus wear ; lateral and vertical
compliance ; and channel phasing. Other features : Triggering and reference level tones
permit use of this record with graphic level
recorders for automatic measurements of frequency response and crosstalk. Price $8.50.
CBS Laboratories, High Ridge Rd., Stamford,
Conn.
COUSINO
ltasic playback
unit for recorded Echo MItic tamperproof
cartridges with three -stage transistor amplifier output to dynamic headset, handset, or input to "Power -Matic" speaker Model PS 4177
or other power amplifiers, public address system or intercom. Features include automatic
shutoff from metallic foil or painted stop on
tape loop. May be restarted by remote cord,
footmat switch. clock, photoelectric cell, and
other switching devices.
Specifications: Transformer powered ; flutter
and wow less than 0.4% rms ; signal -to -noise
ratio, 45 db ; response. 80 to 10,000 cps ; operating speed 3% fps (ITA -ips available) ;
operating power requirements-20 watts,
117 volts, 60 cps a.c., no standby power ; motor
and amplifier operational from 105 -120 volts.
Dimensions 5T,k" wide x 9" deep x 5 %" high ;
weighs 9 lbs. Various accessories available.
Price. $99.75. Cousino Electronics Corp., 1941
:
Franklin Ave., Toledo, Ohio.
1.
PR -2331
Mag -matic tape repeater
2. PS -4177 Power -Matic speaker
3. MS -4547 Footmat start switch
4. PC -4541 Remote start pushbutton
...$297.00
39.00
22.50
4.50
ESL
.l alomatie Record Cleaner. Cleaning the
record as it is played, the ESL "Dust Bug"
solves the problems of diet, lint, and static
build -up on phonograph records and pickup
styli. The Dust Bag cleans records thoroughly
and safely. and it Is easily installed on turntables. It removes dust and lint immediately
before the montent of playing by means of a
-
$3.90.
10 DAY MONEY BACK GUARANTEE
JOHN E. RIDER PUBLISHER INC.
division of Hayden Publishing Co., Inc.
116 West 14th St., New York 11, N. Y.
AS
Please send:
Enclosed is $
#209, $2.90
#282, $1.50
#201 -H, $9.95
#201, $8.70
#226, $2.95
#205, $3.90
#251, $4.25
Name
--
Address
City
-
_
Zone
-State_
CIRCLE 98B
compression indicators. Instant switching
from compression-off-expansion. Two dynamic
sensing controls. Price : factory assembled,
Model 510, $75.00 ; kit, Model 510K, $59.95.
Fairchild Recording Equipment Corp., 10-40
45th Ave., L.I.C., N. Y.
1.
661
Auto -Ten,
tuft of individually pointed soft nylon
fibers
In front of It cylindrical plush pad. the latter
being moistened with a harmless anti- static
fluid which is supplied in a replaceable dispenser. Price, $5.75 for model shown, for use
on turntables. The Changer Dust Bag is designed for attachment to the pickup head of
changers and serves the same purpose. Price,
$4.75. Electro -Sonic Laboratories, Inc., 627
Broadway. New York 12, N. Y.
98
a
ment
FERRODYNAMICS
Magnetic Recording Tape, Brand Five. The
properties of Brand Five include a dry -synthetic lubricant, a hard scratch -resistant
formulation, improved output and uniformity,
and a one -piece quick threading reel. Available In 5 ", 7 ", and 10%" reels in both Mylar
and acetate. Price varies. Ferrodynamics
Corp., Lodi, N. J.
FINCO
FM -4 FM Antenna. The Finco FM -4 antenna
is obtainable in both silver aluminum or exclusive soft gold corodized (FM-4G).
The FM-4 features a high front-to -hack ratio, coupled with high db gain, and is designed on Finco's patented extra -high geomatte antenna principles, using twin -drive
elements having impedance control "T" match
stubs. Extra wide -space element, heavy duty
special square boom, exclusive lock-tile-notilt saddle mounting with box girder snap out, self-aligning brackets, completely pre assembled with double wall reinforced all aluminum elements. Aluminum, $24.90. Gold
Cordorized. Price $27.75. The Finney Company, Bedford, Ohio.
1.
2.
3.
4.
5.
FMT -A
FMT -1, kit
FM -2, kit
FM -3
$14.50
14.50
14.50
13.00
36.35
FM -5
FM/Q
Broadband Very High Gain FM Yagi. FM /Q
"Super Special" two-bay stacked array is a
multiple element broadband FM yogi antenna
designed especially for extended range reception of the 88 to 108 me band. Design features
heavy duty construction employing burnished
seamless drawn aluminum tubing and stainless
steel rustproof hardware. Two 12- element
antennas are stacked together at full wave
spacing for optimum gain and directivity. Exceptionally high signal output is obtained
without the use of troublesome amplifying
devices and attendant noise factor, for permanent high -level response. The array includes
two antennas, stacking harness, mast terminal insulator, and a special 14% -ft. aircraft
alloy (steel) for mounting. Normally supplied
for standard 300 -ohm impedance, the system
is easily converted to 72 ohms as required.
Price $149.96. Apparatus Development Co.,
Inc., Drawer 153, Wethersfield, Coon.
1. "FM /Q" Super Special Broadband Yagi
(single)
"FM /Q"
"FM /Q"
4. "FM /Q"
5. "FM /Q"
2.
3.
Yagi
$49.96
Senior Broadband Yagi
29.96
Junior Broadband Yagl
22.96
Metropolitan Broadband Yagi
14.95
Long Ranger Single Frequency
49.96
AUDIO
AmericanRadioHistory.Com
professional equip-
$125.00
Audio Antu.0
FIDELITY MAGAZINE. 1:205,
A
FAIRCHILD
Compander. The Fairchild Compander is
an auto- dynamic range expander -compressor. It
is passive, introduces no distortion, for stereo mono, noise -free expander -compressor ; 6 db expansion, 10 db compression ; input impedance
0-47k, output 47 -500k. Four visual expansion-
AUGUST, 1962
GENALEX
KT77 Beam Powered Tetrode. Intended as
a replacement for the 6L6GB, the EL34 /6CAT,
and the 7581, the Genalex KT77 permits 32
watts of anode dissipation maximum, and an
output of 72 watts per pair. Grids are gold
plated and optically aligned to ensure freedom from grid emission. The KT77 is built to
very exact specifications, and in addition is
quite rugged. It is one of several specialized
audio tubes. The KT77 may be used in triode.
pentode or ultra -linear push -pull circuit.
Price, $5.50. British Industries Corp., Post
Washington, N.
Y.
KT88 Beam Power Tetrode Replaces
$6.95
6550, 7027A, 6L6GC
2. KT66 Beam Power Tetrode Replaces
4.50
EL35, 5881, 6L6
3. N709 Output Pentode, replaces 6BQ5,
3.80
EL84
4. B759 Double Triode, replaces 12AX7,
ECC83, 7025
3.00
5. U -77 Full Wave Rectifier, replaces
3.70
GZ34, 5V4
1.
able 0 -fl v. peak -to -peak ; pilot signal, screwdriver adjust, variable 0 to 15% of composite,
may be switched off. and Is phase adjustable
± 45 deg. from zero phase with respect to
carrier ; separation, .10 db minimum ; carrier
suppression, In absence of modulation, carrier
is down ;q db minimum from maximum
composite output ; output signal mode, switch able. i. =R modulation (monophonic) L=- It
modulation (full stereo), or L or R only;
'scope sync signals, audio modulation or
pilot signal sync. Dimensions, /6" wide,
lbs.
51,4" high, 5 'A." deep ; weight, 12
Price, kit including tubes and 19 -kc crystal.
Ely
Ave.,
Karg Laboratories, 102
$ /.i .'I..'rs.
South Norwalk, Conn.
SWITCNCRAFT AUDIO CONNECTORS
Audio Connectors
R °?
With
};r
"CAPTIVE
DESIGN"
INSERT SCREWS
From Switchcraft!
KERSTING
/tuill -in Combination 11i -/'i Equipment and
Record Storage Cabinet, Model 11h7í. Featur-
ing tambour doors of solid walnut hardwood, with hand- rubbed satin finish and 11/2"
solid walnut hardwood face moulding attached. Interiors are finished in blended colors.
Unseen portions of the cabinets are of °)!,"
GRADO
Screws remain in inserts when removed for cable
installation. EXCLUSIVE "GROUND TERMINALS"
" Dustat' Velvet Touch Record Cleaner.
This cleaner substantially reduces the electrostatic charge lu records and completely re-
provide complete grounding provisions. Many
other unique features in this 3 -pin line.
A3F- Female Plug- U.S.A. List -$2.25
A3M -Male Plug- U.S.A. List -$1.90
B3M -Male Single Hole Mount
Receptacle -U.S.A. List -$2.90
C3M -Male Panel Mount
Receptable- U.S.A. List -$1.40
See Your Dealer Today or Write Us
tor Dealer Nearest You
moves dirt and grit. The Dustat is easy to
install and is fully adjustable for any turntable. The device does not contain radioactive
materials, nor does It use any fluids. Price,
$6.95. Grado Laboratories, Inc., 4614 Seventh
Ave., Brooklyn 20, N. Y.
JERROLD
FM Range Extender, Model F.11.V. The new
Jerrold FM Range Extender, Model FMS is
an FM antenna amplifier designed to overcome
limitation of FM- multiplex broadcasting. The
1?MX provides a minimum gain of 20 db over
the entire FM band. This one -tube antenna
amplifier eliminates background noise and
"drifting," can be mounted in an attic, closet,
or on any convenient wall or Hat surface
where a 117 -volt 60 -cps outlet is available.
Used with Jerrold's Model MF-2 or MF-4
multi -set couplers, the FMX can feed signal to
two, three, or four receivers. The amplifier is
extremely compact, weighing slightly over 2
lbs. It incorporates the latest 6DJ8 frame
grid tube, insuring stable, high -level performance. Current used by the equipment is
comparable to that used by an electric clock.
It has a shut -olT switch. Price $29.95. Jerrold
Electronics Corp., 15th and Lehigh Ave.,
Philadelphia, Pa.
1.
2.
TX -FM antenna splitter for TV -FM
MKI Magic carpet antenna (printed circuit antenna/
$5.95
9.95
KARG
Stereo Multiplex Signal Generator Kit,
Model MX -1G. Generates composite FM- multi-
plex stereo signal for service and advanced
audio hobbyists.
Specifications: Oscillator, crystal controlled,
19,000, kc ± 2 cps. modulation, internal 1000 epa or external generator (requires 10 v.
rms for full output) ; composite output, vari-
5525 N. Elston Ave., Chicago 30, III.
CIRCLE 99A
-
Douglas fir plywood, primed, ready for painting. Easily installed. Cut opening in wall
slide in and fasten. Contains two Quick-See
Retractable Album Files, allowing front view
flip through selection of records. Price,
$179.95. Kersting Mfg. Co., 504 S. Date St.,
Alhambra, Calif.
1. BE, equipment cabinet
$ 79.95
2 BR, record storage cabinet
3. BTR, tape and record storage cabinet
4. BS, speaker cabinet
5. BTV, TV cabinet
without question
the finest*
99.95
149.95
69.95
119.95
KODAK
Sound Recording Tape. On the market only
since March of this year, Kodak Sound Recording Tape Is a general -purpose magnetic
tape featuring low noise. high sensitivity. high
output. full audio-frequency range. and con-
O NO L/GZ1C is
DUNE
sistent uniformity, both within each roll and
from roll to roll. These properties enhance
the performance of any tape recorder and
permit recordings of highest fidelity with
line recording equipment. Lubrication of both
base and oxide layer is combined with precise
slitting to provide for smooth transport and
precise tracking in tape recorders. Kodak
Sound Recording Tape is available in five
popular sizes: 1.5 -nail Triacetate, standard
play, in 1200 -, 600- and 150 -ft. reels of 7 -,
5 -, and 3 -in. diameter, respectively. and in
1 -mil
Tritacetate Extra Play in 1800 - and
900 -t. reels of 7- and 5 -in. diameter. A unique
feature of all 1200- and 1800 -ft. rolls of
Kodak Tape is the Kodak Thread -Easy Reel.
which is also available separately, and which
makes possible quick and sure threading of
the take -up reel. A special "splicing slot"
ask your dealer
for a
demonstration
IN HIGH FIDELITY SPEAKER SYSTEMS
IONOVAC DIVISION
DUKANE CORPORATION
DEPT. A -82 / ST. CHARLES, ILL.
is also provided on the face of the ThreadEasy Reel. Eastman Kodak Co., Rochester 4,
[]
N. Y.
MARK- Q -MATIC
FIRM
Model MGM-1 Slide Tape Synchroniser. The
Is a simple device which synchronizes
a tape recorder to a slide projector so that
AUDIO
I
__
NAME
(if dealer)_
ADDRESS
111QNI -1
coordinated shows are possible. It installs
simply beside the tape recorder. Synchroniza-
Where can hear a demonstration?
Please send me available information
CITY
STATE
L
__
J
CIRCLE 99B
99
AUGUST, 1962
AmericanRadioHistory.Com
tion of Mark- Q -Matic is accomplished by using "Cueing" pencil on tape. Erasing the cue
mark does not influence program quality. It
does not have transistors or tubes. Simple to
install, and may be used with any reel -toreel tape recorder. Has built -in work pilot
light. Price, $49.95. General Techniques, 50
Hancock Place, Valley Stream, N. Y.
LOOK
THIS
MICHIGAN MAGNETICS
half -Track Head for
Micro -Miniaturization.
Because of its small size and excellent performance, the new 3K17 half -track mono recording head should prove of great interest
and benefit to manufacturers of the micro miniaturized tape recorders. This new bead
is a revolutionary concept in a performance proven mono applications, and can be adapted
to entertainment or industrial recorders.
Specifications: Impedance, 2000 ohms; recording level, - 12 db from saturation ; audio
current, .043 ma ; bias current, 1.0 ma; bias
frequency, 70 kc ; inductance, 300 mh; playback level, 1000 cps, 2.0 my ± 3 db ; 10,000
cps, -8 db ± 3 db ; dimensions : 0.387 in. high,
0.340 in. wide, 0.225 in. deep ; mounting,
6/32 stud, 3/16 in. long. Michigan Magnetics.
Inc., Vermontville, Michigan.
PHOTO
Freouencv Character
e
Seoaialion
STEREO CARTRIDGE
MODEL SX-
1.
P4200,
watts output
15
$ 35.00
2. P4170, 100 watts uotput
3. P4190, 150 watts output
75.00
105.00
R -A -E
Variable Crossover Network.
Variable crossover is fed from preamp. Low range output drives woofer amplifier ; high range output drives tweeter amplifier. Low range switch limits highest frequency fed
to woofer nt 150, 200, 350, 500, 700, 1,000,
1,500 or 3,500 cps. Separate low -range and
high -range level controls for exact balance
between woofer and tweeter. Outputs are
cathode followers. Tubes : three 12A %7. Four
parts boards, two decks and front panel are
assembled and wired separately, then mounted
on the chassis. 6 -in. wide, 8% in. deep. Kit
Price 174.95. R -A -E Equipment Inc., Central
Bank Bldg., Great Barrington, Mass.
Model 100
ROBINS
Gibson Girl "Stereo 4" Tape Splicer, Model
# TS -8D. New "Stereo 4" tape splicer permits
close tape trimming tolerances to protect vulnerable outside tracks of four -track tape. It
handles all /i" tapes equally well, including
one- and two -track recordings. Produces new
streamlined waist that leaves tape edges free
of adhesive. The tape splicer features a two1
MICROTRAN
I
Bulk Magnetic Tape Eraser. The Microtran
r
Model HI) -11M bulk tape eraser is used to
erase recorded signal and noise from magnetic tape without rewinding. The field intensity is sufficient to erase up to 1/2-in. tapes.
The erase coil is encapsulated in high-impact
epoxy so that it is permanently sealed against
SONO\ OX CO.. LTD.
CIRCLE 100A
the elements. The HD -11M may also be used
for demagnetizing recording heads, watches,
and other metal objects. The spindle mount
for tape reels permits rapid and thorough
erasing of reeled tape. It will handle reels
from 5 -in. to 101/2-in. It requires 117 v.a.c. at
5 amps ; it is 7 -in. long, 31/2-in wide, and 31/;in. high ; it weighs 9 lbs. Price, $18.95. Micro-
tran Company, 145 E. Mineola Ave., Valley
Stream, N.Y.
MULLARD
Master 1031 Series. A special range of selected tubes ideal for high fidelity and stereophonic equipment as well as the full range of
today's technical advanced and exacting electronic equipment. Tube -to -tube uniformity and
section -to- section uniformity assured. Each
tube individually laboratory tested and performance guaranteed. Life guaranteed for 10,000 hours of effective performance within two
years from the date of purchase. International
Electronics Corp., 81 Spring St., New York 12,
When KLIPSCH speaks
even PAGLIACCI listens!
For he knows original sound when he
hears it
he's made it!
If you have ears like Pagliacci's, you'll
...
appreciate the Klipsch CORNWALL,
a
speaker you can place against a wall as
well as in a corner. Yet its performance
is second only to the KLIPSCHORN corner
horn speaker. Ideal for stereo.
Ask your dealer to challenge your
Pagliacci ears with a Klipsch speaker
system. Or write for information.
KLIPSCH & ASSOCIATES, INC.
POST
OFFICE
eon 96A
HOPE. ARKANSAS
CIRCLE 1008
stage selector knob with "look -thru" windows
that indicate to the user when blades are in
precise "cut" and "trim" positions. Factory
pre -set blades can be adjusted for lifetime
accuracy. A pair of holding fingers secure tape
during splicing. Unit has integrated tape dispenser with easy threading and is supplied
with it roll of %" x 100" splicing tape. Has a
safety lock to prevent accidental damage when
splicer is not being used. Price, $11.50. Robins
Industries Corp., Flushing, N. Y.
1.
2.
Standard "Stereo 4" tape splicer
Junior "Stereo 4" tape splicer
$8.50
6.50
ROCKFORD
Jlod,rn Ensemble,
Equipment Cabinet and Two Speaker Enclosures. Adds the pleasure of fine furniture to
the joy of listening to good music. Enables
you to achieve a beautiful music center with
your own choice of separate famous -name high
fidelity components for finer mono or stereo
reproduction. Acoustically engineered and furniture crafted of selected woods with genuine
walnut veneer, in rich oil walnut finish.
11odll 799 -791 1)aaiall
N.Y.
PARTRIDGE
Output Transformer. The latest entry from
this well -known British manufacturer is the
P4160 output transformer. Regarded by them
as one of their biggest steps forward for
many years, the P4160 is a C -core transformer
in a seamless steel case, and weighs a total of
10% lbs. Primary impedance is 6600 ohms
with Ultra- Linear taps at forty per cent of
primary turns. On the secondary there are
eight sections of 0.95 ohms each. This will
give 60 ohms when all sections are in series.
Power rating is 20 wate from 20 to 50,000
cps, and 35 watts from 25 to 30,000 cps.
Primary resonant frequency is 120,000 cps.
Partridge Transformers, Ltd., Roebuck Rd.,
tlaessington, Surrey, England. User net price
in U. S. $48.00. U. S. Dist.. Ultra Electronics,
Inc., 235 E. 60th St., New York 22, N. Y.
Equipment cabinet and free -standing speaker
enclosures may be placed together or separate,
as you desire. Sturdy construction assures
long -life stability. Individual cabinets are also
available separately. Price : equipment cabinet,
$113.00; speaker enclosure, $58.00. Rockford
Special Furniture Co., 2024 23 Ave., Rockford,
Ill.
1. 600, Italian Provincial equip. cab. ..$107.00
2. 500, Contemporary equip. cab.
3. 800, Early American equip cab.
4 120, Modern (20" wide) equip. cab
AUDIO
100
AmericanRadioHistory.Com
128.00
118.00
63.00
AUGUST. 1962
TOP ALLOWANCE
ROYCE
"Audio Robot" Remote Control System. The
new Royce Audio Robot remote control system, Model RCS -1, consists of the RC -1 control located at the music system, and a remote control pedestal with indicator light
and switch at the extension speaker. It can
be installed by anyone in a few minutes without any special tools -only a screwdriver
is needed. The Audio Robot turns on or off
any mono or stereo component or console
music system from the extension speaker with-
West 61st St., New York 23, N. Y.
$ 550.00
1. Spinet Organ Kit, complete
800.00
2. Consolette Organ Kit, complete
1200.00
3. Concert Organ Kit, complete
FOR YOUR USED COMPONENTS
AT
1(.
audio exchange
SCOTCH
"Scotch" Brand No. 290 Magnetic Recording Tape. Providing 600 feet of 1/2-inch tape
on a 31/2-inch reel, the new Scotch 290 is fabricated from '4 -mil tensilized polyester backing with a new oxide coating. Incorporated in
the coating is a dry silicone compound to
provide lubrication of the heads thus reducing
wear. This reel provides an hour of recording
time at 3% ips, utilizing two tracks. Price,
22.95. 3M Company, St. I'aul 19, Minn.
WHEN YOU PURCHASE
The SHERWOOD S -3000 IV
FM MX STEREO TUNER
with "Acro- beam" Tuning
7"
expanded slide -rule tuning scale, AutoFeatures
matic Frequency Scale, special inter -channel hush
system which eliminates noisy "hash" between FM
channels.
SHURE
additional wiring. It eliminates unnecessary steps between the equipment and remote
speakers, and is ideal for enjoyment in the
bedroom before retiring. It will extend the
life of your music system by reminding you
visually that the equipment is on even after
records are finished or the radio station is
off the air.
Specifications: Power control capacity, up
to 500 watts ; power requirements, O.1 watt ;
dimensions: Robot control, 51,x" wide, 2%"
high, S1/s" deep ; remote control, 31/2" wide.
1" high, 3" deep. Price, 232.95 complete ;
additional remote controls, 25.49 Royce Electronic Developments, Inc., P. O. Box 321,
Valley Stream, N. Y.
ou t
Shure -Quick Disconnect Microphone Isolation Units. These microphone mounts are designed for use with microphones normally
mounted on desk or floor stands, but which
must be periodically removed for hand -held or
carry -around use. Flanged, live rubber insert
provides instant, non -swaying connection with
microphone stand ; effectively isolates the
microphones from mechanical vibration,
shocks, and noises carried to the microphone
SCHOBER
Electronic Organ Reverberation Unit. The
Schober Reverbatape Unit is the first reverberation device which can be installed successfully in any electronic organ, regardless
of brand or size. Employing no springs, it contains a small tape -recorder mechanism which
a continuous loop of tape and several playback heads, along with special circuitry on
which patents are pending. The reverberation effect, which can be compared to that of
a big pipe organ played in a large church
AUDIO EXCHANGE EXCLUSIVES:
...
Ú
audio exchange
For Trading info., write
AUDIO
dept.
AG.
MAIL ALL ORDERS AND INQUIRIES TO JAMAICA
ARlel 7.7517
15331 Hillside Ave., Jamaica 32, N. Y.
PLEASE
tIi
through stand. Disconnect operation is easy.
silent and instant. Made of aluminum and
anodized for beauty and long wear. Model A45
is designed for microphones incorporating an
isolation assembly. Alodel A47 is designed for
microphones with connectors of standard % "27 thread. Dimensions of A45- 31F-," high x
1- 5/16" diam. assembled; A47 -51F." high x
1 -5/10" diam. assembled. Weight added to
hand -held microphone : A45 -2.3 oz., A473.6 oz. Net weight : A45 -3.3 oz. ; A47 -4.6
oz. Price $12.00 (either model). Shure Bros.,
222 Hartrey Ave., Evanston, Ill.
WHITE PLAINS, N Y.
203 Mamaroneck Ave.
BROOKLYN, N. Y.
1065 Flatbush Ave.
MANHASSET, N. Y.
451 Plandome Rd.
CIRCLE 101A
Chief Fidelitone
ingredient:
SOUNDCRAFT
New "Golden Tone" Premium Tape Line.
Soundcraft "Golden Tone" is a more expensive
or theatre, is obtained from a series of carefully- spaced repetitions of the sound which
blend to give the characteristics, gradual delay. Since the spacing of the repetitions is
long enough and the system lacks self -resonances, the effect is startlingly realistic.
Dimensions : Main Unit, containing tape recorder and electronic circuitry, 9%" wide,
11/4" high, 5%" deep ; power supply, 61/4"
wide, 21F high, and 2" deep ; control, a 3gang potentiometer which may be mounted
anywhere on the organ console. Price,
1299.95. The Schober Organ Corporation, 43
TRADE 4 WAYS
TRADE Hi -fi for hi-fi
TRADE Amateur radio* for hi -fi
TRADE Hi -fi for amateur radio
TRADE Amateur radio* for amateur radios
Includes HAM; SWL; Citizen's Band; Test Equipment
New Equipment from over 100
Trade -Back Plan
Used Equipment sold on 10 -day unmanufacturers
plus 90 -day servguarantee
-back
conditional money
Special GE credit plan Custom Instalice warranty
Hi Fi
equipment.
monaural
and
lation for stereo
service laboratory.
trade
at
Get more! Pay less when you
SARKES-TARZ IAN
hagnrrie Pape. Three types of Tarzinn
Tape satisfy virtually every requirement for
sound recording. Include standard -play 1.5mil acetate, long -play 1.0 -mil acetate, long -play
1.0 -mil Mylar. Each type is available In choice
of 3, 5, and 7 -inch reels, and on professional size reels and hubs. Each reel is packed in
protective carton and plastic. Prices begin at
650 for 150 feet of standard play 1.5 -mil
acetate. Sarkes -Tarzian, Inc., Magnetic Tape
Div., Bloomington, Ind.
4,
tape because it uses only the most magnetically
active oxide particles in the coating for the
finest sound reproduction and is manufactured to close tolerance precision for physical
perfection. It has been produced to meet the
exacting demands of today's advanced recorders which standard tapes cannot satisfy.
"Golden Tone" is the tape for people who
appreciate fine sound reproduction and have
the equipment to produce it. "Golden Tone"
is available in the following sizes : 1 -mil
Mylar Tensilized, GTM -18T, 1800 ft. 7 -in.
reel, 27.50 ; % -mil Mylar Tensilized. GTM24T, 2400 ft., 7 -in. reel. $11.40 ; % -mil acetate base, GTA-12, 1200 -ft. 7 -in. reel, $4.70.
Reeves Soundcraft Corp., Great Pasture Road,
Danbury, Conn.
Dupont T.M.
STANTON
Model 604 Stanton Stereo KableKit. A low cost stereo cable assembly quickly converts
automatic mono changers or manual tone
arms to stereo. Fully shielded harness has
plugs and connector clips already soldered.
Length of harness is 4 feet. Supplied with
cable retention clips. Price, 23.98. Pickering
and Co., Prof. Prod. Div., Plainview, N. Y.
QUALITY
We don't use just diamonds -we
use gem stone quality diamonds.
And it's the same with each
component of each Fidelitone
diamond needle. The finest materials, engineering talent, and
workmanship all combine to
assure you of quality needles
for quality sound reproduction
equipment.
When you need a needle, get
specify Fidelitone
quality
on top since 1929.
-
-
-
Fidelitone
"Best buy on records"
Chicago 26, Illinois
CIRCLE 10113
101
AUGUST, 1962
AmericanRadioHistory.Com
Superb ... because Wharfedale Achromatic Speaker Systems are crafted to
reproduce music -as music really is.
No spurious resonances, no artificial
colorations mar the fidelity of reproduction. Listen to your favorite musical work on a Wharfedale -hear,
perhaps for the first time, the clear
transparent highs, the rich mid- tones,
the fullness of a superb low-range.
Sand Filled Panel
In the streamlined look of fine modern furniture or
handsomely crafted provincial. this full -range two speaker
system continues to provide superlative performance
making it the automatic choice when the finest reproduction is desired. True Wood $116.50. Unfinished, in
sanded birch hardwood. without cured molding or
dividers S10I.50.
WEiO
l'rnsinci:d in vermin, Fruitwuud SI14,511
-
PR
W70
n
The inert sand filled panel (exclusive in all
Wharfedale Systems) damps all vibrations,
eliminates false resonances. The speakers
perform with the enclosure as a single unit.
The full range of sound is exceptionally
smooth; transient response in bass and
treble is exceptionally clean. A perfectl.
pure "Achromatic" musical image is
achieved without acoustical coloration.
W40
A three -speaker system -the ultimate in complete
units- handsome by itself. yet still sufficiently
compact for shelf or wall integration. The beauty
and excellence of performance of this remarkable
system makes it unusually attractive to experts
and laymen alike. True Wood $164.50. Unfinished
in sanded birch hardwood, without curved molding or dividers. $146.50.
W70 PR
.
Ultra-compact (24 "x 12 "x 10")
full -range system at a most attractive price. Two superior
speakers. A newly developed
81/2 inch low frequency driver
with an extremely high flux
density magnet -and Wharfe-
dale's outstanding
5
inch
tweeter-the same used in the
larger W60 system. True
Wood $79.50. Unfinished in
sanded birch hardwood, without curved molding $69.50.
Provincial in
genuine Fruit wood
5189.50
I.J
F'
115
Fell
Range 8"
Super 8
FS, At,
$26.50
Full
Full
Range 10"
Super 10
Range 12"
Super 12
RS /DD
$47.50
Wharfedale,
a
RS 'DD
Woofer
W 12/R8
Woofer
W 15 RS
Tweeter
Super 3
$89.50
$52.50
$89.50
$26.50
For illustrated literature write: Dept. WK 12
Division of British Industries Corp., Port 1%a,hineton,
Universal mounting base in matching woods for
WOO and W70 systems. Easily installed to enhance the beauty of these enclosures.
True Woods $9.95.
Utility model In sanded birch hardwood $8.95.
.l.
102
AUDIO
AmericanRadioHistory.Com
AUGUST, 1962
STATICMASTER
TRANSVISION
Record Brush. The Staticmaster record
brush Model 3R500 employs a polonium strip
as a static neutralizer to make cleaning rec-
23" TV Kit with 10 -Watt Push -Pull Amplifier for Audio System. Featuring a unique
system of built- it -in- sections wherein one can
buy the kit in sections as money and time
Dynamic
HEADPHONES
ords rapid and simple. The brush of the
Staticmaster is made of genuine Jaguar hair
which is both strong and soft. Nuclear Products Co., 10173 East Rush St., El Monte, Calif.
User net price, $1 ;.95.
SWITCHCRAFT
dictate. The unit shown, KG -10, includes a
10-watt audio amplifier although the kit may
be purchased without it. Basically these are
custom TV kits. Price 5199.00. Transvlslon
Electronics Inc., Grey Oaks Ave., Yonkers,
Unexcelled for
N. Y.
Model 306TR Stereo -Mono Microphone
Mixer. The 306TR is a 4- channel, high -impedance mixer. It feeds 4 signals (mono) or
2 signals (stereo) into a single output to a
tape recorder. Accepts signals tip to 1.5 volts.
Transistorized amplifiers provide 6 -db gain.
-
Standard of the World
Quality
ULTRAUDIO
Frequency Response Range
Durability & Ruggedness
"Customixer." Professional highfidelity mixer accepting up to 5 microphones
or other sound sources. Will feed tape recorders, telephone line and sound system. Features
real Vi' meter, straight -line volume controls,
.Model 11-5
Comfort
Noise Exclusion
PERMOFLUX headphones
carry
a
life -time warranty!
Write for catalog
PERMOFLUX CORPORATION
P.O. Box 1449, Glendale, Calif.
CIRCLE 103A
Response 20 to 20,000 cps. Each channel has
separate volume control. Lever switch permits easy switching from mono to stereo.
Price, $37.50. Switchcraft, Inc., 5555 N. Elston Ave., Chicago 30, Ill.
1. 306, 4- channel stereo -mono mixer
$22.50
2.
3.
4.
5.
301TR, 4- channel mono mixer
301, 4- channel mono mixer
310, 2- channel mixer
311, 2- channel mixer
30.00
19.50
7.95
8.95
TACO
"LARK" FM Antenna Ad-A -Kit Model
KG626A. The Lark Ad -A -Kit (Model KG626-A)
was designed for the do- it-yourselfer. When
mounted on an existing TV antenna mast,
it adds properties of a separate FM antenna.
The kit provides Taco's "Lark" S -type FM
antenna, with 50 ft. lead-In, woodscrew and
mast -type standoffs. The antenna is omnidirectional, providing reception, without rota tatlon, from all directions, up to 25 miles
from the transmitter. The Lark antenna is
anodized (gold color) and cannot rust or deteriorate. The kit lists for $8.95. Technical
Appliance Corp., Taco Ave., Sherburne, N. Y.
1.
Bi- directional multiplex antenna
(No. 615)
2 G -666 FM turnstile
3. Fringe Yagi 164481
4. Deep fringe Yagi (Model 610)
self -contained power supply. All amplifier
stages are plug -in, eliminating chance of failure. Ili and Low Z. Price $288.00. Ultraudio.
Box 021, Beverly Hills, Calif.
1. D -4, stereo Customixer, 4 inputs,
$288.00
2 VU's
2. C -1, decorative Customixer carrying
39.50
case
3. S- 90472, plug -in preamplifier
12.50
tone
4. S- 90487, plug -in
generator
oscillator
30.50
5. R -16, plug -in multi -impedance input
11.40
xfmr
Ajio Robots
are for SleePing
... or,
for simple relaxing
... or,
for
any capricious whim we elect to exer-
WINEGARD
PF -8 "Stereo -Tron" Electronic FM Antenna. The I'F -S Stereo-Tron, when used
with a rotor, gives good reception on at least
85% of all FM stations within a 200 mile
radius. This is as super powerful electronic
FM yogi with a built -in transistor amplifier.
It has a minimum 25 -db gain over a folded
dipole and is recommended whenever the
cise when we listen to high fidelity
music. Audio Robots add an impor-
tant measure of leisure to high fidelity
-learn more about the newest development since the stereo record. Send
for your free copy of
$12.95
9.70
21.20
... "Audio
Robots Are For Sleeping"
30.70
.41bbnors
TERADO
Transistorized Power Inverter. The Terado
Atlas, #50 -200, changes 12 -volt battery current to regular 110 volts, 60-cps a.c. Has capacity of 175 watts continuous ; intermittent
200 watts, 60-cps maintained within 1 cycle
plus or minus regardless of changing input
or load. Excellent for operation of tape recorders, television sets, sound cameras, amplifiers, and so on. Will also operate hand
power tools, vacuum cleaners, a.c. -d.c. motors,
universal type up to '.6 h.p., test equipment.
Ideal for mobile truck displays of office
equipment, and service trucks. Comes complete with remote control, cables and battery
leads. Price, U29.50. Terado Corp, 1064%
Raymond Ave., St. Paul 8, Minn.
AUDIO
,4iae
ROYCE ELECTRONIC
DEVELOPMENTS, INC.
50 Hancock Place
'
Valley Stream, Long Island,
very finest installation is desired. Ideal for
home use as well as in large distribution systems motels, hotels, apartments, hospitals.
etc. 300 -ohm twin lead is used. Price $64.25
including amplifier and power supply. Wine
gard Co., 3000 Kirkwood St., Burlington, Iowa.
1. FM -8
$23.65
2. FM -3T, FM antenna
12.25
3. K2 -FM, antenna
5.05
:
-
4.
CA -FM, TV -FM antenna coupler -
splitter
4.50
N. Y.
à{'f,
è
Please send me Free
copy of AUDIO ROBOTS
ARE FOR SLEEPING
Name
Address
City
_
_-
_____ -__ _
Zone
-_State
CIRCLE 103B
103
AUGUST, 1962
AmericanRadioHistory.Com
You
(from page 23)
SAVE
MONEY!
RUSH
US
LIST
OF
YOUR
HI
-
FI
COMPONENTS
FOR
A SPECIAL
QUOTATION
WRITE FOR FREE
AUDIO DISCOUNT
CATALOG
A
-15
New low prices on amplifiers, tuners, tape recorders, speakers, etc.
KEY
CLASSIFIED
TRANSISTOR FRONT -ENDS
ELECTRONICS CO.
ST.
120 LIBERTY
NEW YORK 6, N.Y.
Erases an entire reel
in seconds!
One interesting question which is often
raised is how do transistor noise figure
and gain vary with life. Figure 14 shows
a plot of power gain, noise figure, and
bandwidth on a group of 2N1742's as a
function of hours of life at maximum
rating. Note that these units were tested
in a fixed-matched, fixed- biased and
fixed -neutralized circuit and are therefore representative of actual circuit operation. Note there is a very little change
to 7000 hours, or nearly one year of
continuous operation. As a result of
these measurements, we are convinced
that it is safe to say the high -frequency
characteristics of transistors do not
change with life until after the transistor
has failed normal static end -of -life conditions. There are two observations
which may be made from this statement.
First, the use of static characteristic to
define end of life is useful even for high frequency parameters and second, one
should not expect the gradual slumping
in gain and noise figure normally encountered in vacuum tubes under typical
operating conditions.
Another question which is often raised
is how do gain, noise figure, and so on
vary with temperature. Figure 15 shows
a plot of the 2N1742 gain, noise figure,
bandwidth, and collector current in the
fixed -matched, fixed -neutralized, and
fixed -biased test circuit over a temperature range of - 60°C to + 80°C. The transistor was inserted into the circuit and
tuned for maximum gain at room
temperature. Only the temperature of
the transistor was changed, no further
tuning was allowed. Thus, the changes
are representative of the variation which
might be expected in a practical circuit
as a result of the transistor changes
alone.
LOW -COST BULK TAPE
ERASER model ME -17
At last! A professional quality bulk eraser for the
amateur recordist. The ME -77 completely removes
recorded and unwanted signals from reels of tape
up to IA" wide and 7" in diameter. Seconds after
you switch it on -you have a fresh -sound -free
and noise -free tape ready for recording. And since
the ME-77 reduces background noise 2 to 4 db
below normal erase head levels. future recordings
will be as clear as the original. Easy to use, the
compact ME-77 comes in adurable bakelite housing.
Only $22.00
At dealers or write:
ROBINS INDUSTRIES CORP. Flushing 56,
N. Y.
IIIGII FIDELITY SPEAKERS REPAIRED
A\ll'ItITE SPEAKER SERVICE
168 W. 23rd St., New York 11, N. Y. CH 34812
ENJOY PLEASANT SURPRISES? Then
write us before you purchase any hi -fi. You'll
be glad you did. Unusual savings. Key Electronics, 120 Liberty St., New York 6, N. Y.
CLoverdale 84288
PROFESSIONAL RECONDITIONING all
audio and recording equipment. Low prices on
components with service. Best trade -in deal in
the country. Dick Simms, Audio Trading Post,
Inc., 2nd Floor, 58 W. 48 St., New York 36,
N. Y. JUdson 2 -2356
SALE ITEMS- tapes recorders -component quotes. Bayla, Ilox 131 -0, Wantagh,
-
N. Y.
FAIRCHILD STEREO CUTTING SYSTEM
WITH HEAD, 100 hours' use plus unused
spare heads. List price $9,300. Price for immediate sale $6,500. Hamilton Audio Electronics, 45 West 45th Street, New York City.
CI 5 -3430
WANTED: Stephens 425H horn. Paul Montgomery, 40 NE Tenth Street, Oklahoma City,
Okla.
MAGNETIC TAPE, 4800' on broadcast 14'
reel. Used, excellent. Postpaid, $6.00. SueJoy
Productions, 45 Hartland ltd., Rochester 17,
N. Y.
WANTED : THORDARSON power transformer, model T- 15R05. Must be perfect. J. J.
Keane, 713 W. 47 St., Chicago 9, Ill.
LP RECORDS FROM YOUR TAPE. 40 minutes, $6.00, p.p. Write for quantity prices.
Quick service. Custom Recording, 923 pansas
Avenue, Kansas City, Kansas.
HARPSICHORD, $150, in kit form for easy
home workshop assembly. Write for brochure :
Zuckermann Harpsichords, Dept. R, 115 Christopher St., New York 14, N. 1.
WANTED : Three used James B. Lansing
537 -509 horns -lens assemblies. N. Metal, 1947
W. 7th Avenue, Vancouver 9, B. C.
SELL : Ampex 400 in portable case, $390,
Concertone 20/20 in portable cases, $245, both
in perfect condition. Don Warnock, 117 West
67 St., Kansas City, Mo.
WE RENT STEREO TAPES
:
both 2- and 4-
track; all labels. Over 2500 different. FREE
BROCHURE. strreo- Parti, 811Il Centinela
Ave., Inglewood. ',lifornia.
BOUND VOLUMES
Conclusion
ROBINS
Rates: 10c per word per insertion for noncommercial
advertisements; 25e per word for commercial advertisements. Rates are net. and no discounts will be
allowed. Copy must be accompanied by remittance In
full, and must reach the New York ornes by the
first of the month preceding the date of issue.
The transistors described and the circuits presented indicate that transistor
front ends are truly practical for FM
receivers. Sensitivities and quieting
levels equal to, or better than, tube receivers are possible. While transistors
have only just begun to enter the FM
field, indications are that they will continue to be used in increasing quantities
not only in portable receivers but in
many other applications.
Intermodulation is a major problem
which remains to be solved. At present,
the solutions are primarily of a circuit
nature. For most applications careful
circuit designs can solve most of the
problems. The improved reliability and
the possibility of portable FM receivers
provide two important advantages which
are possible with transistors.
1961
LIMITED NUMBER
AVAILABLE
$10.00 EACH POSTPAID
U. S. DELIVERY ONLY
Send Order
and Remittance Today
Book Division
Radio Magazines, Inc.
P.O. Box 629
Mineola, N. Y.
AUDIO
104
AmericanRadioHistory.Com
Issues
Audio Magazine
Order Now
AUGUST, 1962
ELECTRONIC WORLD
AUDIO EXCHANGE -New York area
"chain" of hi -li stores-celebrated its
eleventh anniversary on June 28. Ceremony was marked by presentation of a
framed proclamation from Jamaica (N. Y.)
Splice Free -Guaranteed 1st Quality
15-day Money Back Guarantee
60A
90M
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2.59
15 Per Reel Postage & llandl ing -1
Wt. permitted For 24+ price.
nr
KARG
9osciusinry /Vales .
HI -FI RECORDING TAPE
r
1.09
1.45
1.85
2.49
24+
rack model
Reels
FM Stereo Multiplex
Don't Buy Any HI -FI Components or Tape Recorders
until you get our Low. Low Return Mail quotation.
Generous Trade -In cm Old Equipment. WE GUARANTEE WE WILL NOT RE UNDERSOLD. Easy Pa9
l
Signal Generator
Nan Up to 24 moo. to pay.
CATALOG AND BEST BUY LIST FREE.
Produces the FCC specified
composite Stereo Multiplex
FAIR
ELECTRONIC York
28.
N.Y.
Dept. U--1797 1st Ave., New
Specializes in SAVING YOU MONEY
FACTORY FRESH
LOWEST
COMPONENTS
POSSIBLE QUOTATIONS
FAST DELIVERY
for most
We are FRANCHISED DEALERS
Altee Lansing Corporation, a subsidiary
Ling -Temco -Vought, Inc. appointed
Charles L. Range as Regional Sales Manager for the company's line of stereo consumer products, commercial and industrial sound system equipment, telephone,
microphone, and broadcast equipment in
the Mid- Atlantic states. William E.
Yeager was also promoted to the newly
created post of Engineering Information
Manager.
The R. T. Bosnk Manufacturing Compaqy, South Norwalk, Conn., recently increased total production facilities by doubling the size of their No. 2 furniture
plant, ensured uniformity of output 133
installing what is believed to be the industry's first complete climate control,
and further speeded production by a re
t:angement of the main plant layout.
of
Circle 105D
COMPONENTS, TAPE RECORDERS
Write for our low quotes on your choice of coniponents. Save more on "pkges." All factory sealed.
Send for "Monthly Specials" bulletin.
HI -FI RECORDING TAPE
Splice Free (except 2400') freq. rasp.
20- 20,000 cps. 15 day money back guarantee.
24
3-11
12-23
1200' 7" acetate
$ .99
$1.29
$1.17
1.40
1.83
2.4;
2.90
Reel
10g For 24 Lots
125 -N East 88 St., New York 28, N.
Y
r'///CARS-MN
ARTISAN ORGAN
"King of Kits"
ultimate in organ
A styling
dealer profits and
factory labor
The
tone
Skip
Pay
play
as
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as you build
&
technical
previous
skill required
The
original build
yourself organ
Choice of models from $1750 to $5500
No
it-
$2.50
each
CANADA
KARG LABORATORIES
162 ELY AVENUE, S. NORWALK, CONN.
Crcic
-
26 DUNDAS ST. WEST. TORONTO, CANADA
Circle 105G
HI
-FI!
ISOTONE
acoustical tone equalizing music system
AN ACOUSTICAL LANDMARK
AUDIO
ORDER NOW-send
check or money order
Listening to music with content is an indulgence of the genteel, an introspective pastime
that must be unimpeded in order, adequately,
to resolve the message conveyed in otherwise
flawless tonality. In high fidelity, especially,
distraction is barbarous. Quiet, Please! is an
insistence. "Quiet" is the Hall Mark of superior performance in a music system. "Quiet"
inheres in Isotone's long, continuously folded,
air -cushion design. Listen to Isotone's airmass-controlled bass! Ask your distributor
about us. Send for brochure.
Kt gold.
MAGAZINE FILE CO.
520 FIFTH AVENUE
ISOTONE ASSOCIATES
Satisfaction guaranteed
NEW YORK 36,
Each
file holds
Attractive and
practical for your
home or office
o
full year's copies.
Volfor every
Jesse Jones
ume
Files
publication.
3
for $7.00
6
Covered in durable
BRITISH EQUIPMENT from the United Kingdom
Hi -Fi Moil Order Specialists.
Send us details of your needs!
AMPLIFIERS
MOTORS TUNERS
PICK -UPS
SPEAKERS
leather like Kivar,
All
insured and
goods carefully packed,
shipped promptly at minimum cost.
(SALES)
LTD.
(Dept. A)
C.
GOODWIN
C.
7, The Bdwy., Wood Green, London, N.22., Eng.
Circle 105H
10511
SAVE YOUR
COPIES OF
and Accessories
E;LECOO10E
SOUND SYSTEMS
prepaid
order to
or money
Fidelity Shnw in October.
High Fidelity Equipment
Complete Service
Complete Lines
Hi -Fi Records
Components
AUDIO
For
L
shipment in U.S.A., send check
Itayrenth, Hamburg, Paris, and Edinburgh.
Winning dealer is MacDaniels HiFi, of Menlo
Park and salesman Ron Dorsey. Congratulations to all of them.
Alfred M. Zuckerman, formerly Chief
Engineer of David Bogen Company, and
Jules J. Rubin, professional musician,
audio merchandiser and marketer, joined
in formation of Royce Electronic Developments, Inc., with offices and plant at 60
Hancock Place, Valley Stream, N. Y. Line
will be shown to public at the N. Y. High
Circle 105F
TOPS
Send complete data and specs.
FLASH: Just in time for this issue, Herb
Horowitz, president of Empire Scientific Corporation announced the winner of Empire's 1st
Annual Round the World Music Festival.
Lucky man is Pat Nail, of Sunnyvale, California. Mr. and Mrs. Nail will make the three
week trip through Europe, visiting Athens,
Dubrovnik, Route. Bregenz, Salzburg, Munich,
Write today for details
4949 -A York Blvd., Los Angeles 42, Calif.
IN
SAVE $100. Build your own
Precision MX-1G Generator
-kit $150.
-
Circle 105E
I
Servicing and alignment
of Tuners and Adaptors.
Model MX-1G cabinet $250.
$255.
Model MX-1G rack
assistant secretary.
Hi -Fi
lines. Most orders SHIPPED PROMPTLY from
stock. RECORDING TAPE at LOWEST PRICES.
FREE 95 Page STEREO CATALOG.
190-A Lex. Ave., Cor. 32
St., New York 16, N. Y
139
1.59
1800' 7" acetate
1.95
1.85
1800' 7" mylar
2.59
2400' 7" mylar
2.69
2.99
2.95
2400' 7" U11311ized mylar
l'an Ice Assorted. Add 15C Postage Per
signal.
Production alignment and testing of Stereo Adaptors, Tuners
and Receivers.
Chamber of Commerce. Photo shows State
Senator Seymour R. Thaler (center) looking on as Jamaica C.C. official Hughes,
(left), makes presentation to William Colbert, Audio Exchange prexy.
William A. Harrison was elected treasurer of Allied Radio Corporation, relieving Arthur Davis, executive vice president and company director of the duties
as treasurer to devote full time to his
other managerial duties. Mr. Harrison
will continue to serve as controller and
Circle 1050
title embossed in
IFREE
16
UEP
for $13.00
N., Y.
3402 Third Avenue
New York 56
CRIPTIVE FOLDER
ON
R
E
Q
U
E
S
T
1
Circle 1056
105
AUGUST, 1962
AmericanRadioHistory.Com
Now you can enjoy the superlative reproduction and fidelity of prerecorded
tape at the price you'd expect to pay
for a record changer. Precision engineered, the RK -141 is equipped with
its own 6-transistor stereo preamplifiers
designed to play back 1/4 track and 1/2
track stereo plus 1/2 track and full track
monaural tape with true NARTB hi -fi
The New
Lafayette
2 Speed
Stereo
Playback
Tape Deck
Complete with
Built -in
6 Transistor
Dual Playback
Preamps
Magnificent
Fidelity
The
tape equalization. Its tape handling
mechanisms and heads are of a type
found in costlier units. Accepts all size
reels to 7 ". Measures 10%/%Dx14%Wx
5 "1-I. Complete with cables. Shpg. wt.,
17 lbs.
RK -141WX
Net 59.50
Furniture Grade Walnut Base. Wt.,
RK -148W
4 lbs.
Net
Portable Carrying Case. Wt.,
5
Net
SPECIFICATIONS
71/2
Gg 33/4
45
73, 74
Acoustic Research, Inc.
Allied Radio
Altec Lansing Corporation
Artisan Organs
Audio Devices, Inc.
Audio Exchange
Audio Fidelity Records
Audio Originals
Audio Unlimited
81
105
71
101
79
95
105
Bell Stereo Components
Benjamin Electronic Sound Corp.
Bozak Speakers
18
59
4
British
Industries Corporation
Burgess Battery Company
3.
IPS, 50- 15,000 CPS ±- 2.5db;
IPS, 50 -9,000 CPS 3- 2.5 db
Wow and Flutter:
0.15% Or 71/2 IPS, 0.2% @ 33/4 IPS
Cross Talk & Stereo
Channel Separation: 50db
Signal To Noise Ratio: 50db
Playback Output with
Built-In Stereo Playback
Preamplifiers: 0.5V
AC operation 110-120V, 60 cycles
105
Carston Studios
Classified
9.95
Dukane Corporation
Dynaco, Inc.
99
Eastman Kodak Company
EICO
Electronic Applications Inc.
53
104
67
13
93
Coy. IV
105
98
Fairchild Recording Equipment Corp.
Fidelitone
Finney Company
Fisher Radio Corporation
Foster Electric Co., Ltd.
101
14
9
92
3
Garrard Sales Corp.
105
Goodwin, C. C. (Sales) Ltd.
80
Gotham Audio Corp.
10
Grado Laboratories, Inc.
Grommes, Division of Precision Electron85
ics, Inc.
47, 61
Harman - Kardon
Hi Fidelity Center
International
rated
105
Electroacoustics
Incorpo84
International Electronic Sales Corp.
91
105
Isotone Associates
of
63
Jensen Manufacturing Co.
Jerrold Electronics Corp.
Stereo- Tape
Nothing Else To Buy!
Includes Stereo
Playback Preamps
102
86
Electro- Voice. Inc.
Electro -Voice Sound Systems
Frequency Response:
61
INDEX
6.95
lbs.
RK -147W
ADVERTISING
2
Karg Laboratories, Inc.
Key Electronics Company
KLpsch and Associates
105
Lafayette Radio
106
100
Lansing, James B., Sound, Inc.
55
Magnecord Division of Midwestern Instruments
3M
6
7
Newcomb Audio Products Co.
North American Philips Co., Inc.
89
Omega Electronics Corporation
97
5
103
Permoflux Corporation
Pickering G Company, Inc.
Pilot Radio Corporation
17
Pioneer
51
15
Reeves Soundcraft Corporation
65
Rider, John F., Publisher
Roberts Electronics, Inc.
Robins Industries Corp.
Royce Electronic Development, Inc.
98
.
57
104
103
77
Sarkes -Tarzian, Inc.
II
Scott, H. H., Inc.
Sherwood Electronic Laboratories, Inc. C.
83, 88
Shure Brothers, Inc.
100
Sonovox Co., Ltd.
96
Stackpole Carbon Co.
49
Inc.
Superscope,
1
AFAYETTM
R, A n I o
Dept. AH -2, P.O. Box 10, Syosset, L. I., N. Y.
Name
FREE
Address
Zone
City
Mail Order Sales Center
Syosset, Long
Island, N. Y.
State
Lafayette
Summer Catalog
Supplement
New York 13, N. Y. /Jamaica 33, N. Y. /Bronx, 58, N. Y.
Newark 2, N. J. /Paramus, N. J. /Plainfield, N. 1. /Boston 10, Mass.
Switchcraft, Inc.
99
Tannoy (America) Ltd.
Morons Division, Elpa Marketing Industries, Inc.
Tansvision Electronics, Inc
95
Ultra Electronics, Inc.
University Loudspeakers
94
Viking of Minneapolis
Ill
AmericanRadioHistory.Com
87
11
Coy.
Wharfedale
Wilder Engineering Products
AUDIO
106
69
102
97
AUGUST, 1962
TY2IC.4L INSTR,LATICP? Maybe yes, maybe
no, but with I, king Tape Compwents col
choose the per'ormance you need for the in-
stallation yoL hare planned. Write for full fasts!
a critical
look at
Quality
Tape
Equipment
The new Viking 86 Series Transport...
High ) erformance guaranteed from the laminated, metal -faced heads to
the reliable 2- motor, flutter- filt .ir drive. Available with a variety of stereo
a-d monc head configurations to meet individual needs. Playback
capability 20. 20,000 cps ± 2 db. Tape r.in -out switch; 33/4 and 7' ips;
head shift; tape lifters. Erase -Protek, of course. Priced from
$.32 00, varies with quantity and type cf heads.
The RP83 Recording /Iayback
Amplifier...
Styled to catch in appearance and performance with the 86 Series
Trar f. port 80 kc bias fregLency for full fidelity extended range recordings.
Ole -volt output (playback) to music system. Mixing controls on
Vka' aid "Hi- Level" inputs Large VU meters. operable in recording
and playback modes. Recordi.g indicator. Net Price $87.50
(twc -equired for stereo recorcing).
'
For complete technical literature, visit your
franchised Viking dealer or write to:
ng
:600 ALD'sICH
AmericanRadioHistory.Com
OF
MINNEAPOLIS, INC.
AV E. SO., M
I
V
N=APOLI S 20, MINNESOTA
1111111111111111
SETTING NEV/ STANDARDS IN SOuN
THE NEW ELECTRO-VOICE
MODEL 633 AND 634
UTILITY MICROPHONES
No
An cwiting nc ;In.\\CF to your most
demanding microphone needs! The ElectroVoice Model 633 and 634 utility microphones. Handsome new style wedded to
rugged, dependable performance. Looks
good anywhere...sounds great everywhere!
!
...TOUGH
as nails!
Specify the Model 633 for floor or desk
stand use in school sound systems, tape
recorders or industrial applications. Choose
the Model 634 for custom mounting on
boom or gooseneck in language laboratories,
paging systems or wherever semi -permanent
mounting is required.
Identical except for mounting, the 633 and
634 both feature a precision dynamic element
with remarkable E -V Acoustalloy' diaphragm for smooth, peak -free response and
unparalleled reliability despite high shock,
moisture or heat. The generous diameter
plus a high -energy magnetic structure offers
excellent sensitivity for every application.
The precision dynamic element is carefully
"packaged" in modern, unbreakable Cycolace plastic combined with a satin-chromium
finished, high -density die casting that soaks
up abuse yet stays attractive for years.
Handy on -off switch is included. Choice of
high- or balanced low- impedance models.
In every way these fresh new dynamics set
new standards of appearance and performance ... yet the price is surprisingly low!
The result of advanced engineering plus the
most modern and efficient production facilities in the industry! Make the Electro -Voice
Models 633 and 634 your new standards of
utility microphone excellence, today!
* T. M. Borg. Warner
Model 634
SPECIFICATIONS: Response
70.10.000 cos. Omnidirnctwnal.
Sensitiity .57 db (Hi -Z, ref. 0 dig=
1 voltldyne /cm7), Aallablr H1Z or
balancrd 150 ohms. 633. 5/8"-27 mounting.
6 -loot cable :. ilh connector at microphone.
$35.00 List. 634. 518 ".27 thread at back.
6.foot cable coaxial :. ith mounting thread.
glereracc:
ELECTRO -VOICE, INC.
Dept. 822A
crtgan
AmericanRadioHistory.Com
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