short wave - American Radio History

short wave - American Radio History
SHORT WAVE
VOL. XXXVIII
NOVEMBER 1980
NUMBER 9
LOWE ELECTRONICS
SO
FOR RECEIVERS HAND
ERE
MUCH
IS
CORE
TRIO R1000 The finest receiver on the market.
This price includes DC kit fitted and the peace of
mind that comes from buying Trio from an
approved dealer.
£285.20 inc VAT securicor carriage £4.50
2 METRE FM IS
THE SR9.
2m FM Tunable 144.146 MHz
12V operation plus
11
channel crystal control
£46 inc VAT carriage £1.50
LOWE SRX-30 The SRX30 is the most impressive
mid price receiver available to the keen DX -er.
500kHz-30MHz continuous coverage. Drift
cancelling system.
£158 inc VAT securicor carriage £4.50
And for the Air Band enthusiast we have
THE DIGITAL FLIGHT SCAN
£215 inc VAT securicor carriage £4.50
SEND 48p IN STAMPS FOR FULL CATALOGUE
LOWE ELECTRONICS Ltd.
CHESTERFIELD ROAD, MATLOCK, DERBYSHIRE. DE4 5LE
TEL. 0629 2430
THE SHORT WAVE MAGAZINE
Il
November, 1980
LOWE ELECTRONICS Ltd.
2 METRE FM
TRANSCEIVER
£268 inc VAT securicor carriage £4.50
The new TR7800 just has to be voted the best 2 metre FM transceiver
to appear on the world scene. Following detailed market research, Trio
have produced what we think is the perfect mobile/home station rig for
all users, incorporating all the features which were requested by
amateur radio operators worldwide.
What does it do?
Let's take the basic specification first, and say that the TR7800 is a fully
synthesised 2 metre FM transceiver having a minimum output power of
25 W on transmit (typically 30-36 W on random samples), and an
incredible receiver which is typically producing sensitivity measurements
of 0.12 microvolts for 12 dB Sinad. This is certainly the best FM
receiver of which we know. That's the basic story so let's go on to the
user features.
It's clear from the photograph that you have direct keyboard entry of
frequency actually from the front panel. From the keyboard, you can
also select simplex and repeater shift functions for use either on UK or
American repeaters. The digital readout tells you the operating
frequency including any selected shift so you are completely in touch
with your mode of operation.
So far so good - but what about the mysterious knob on the right hand
side of the panel? Well, that selects a bank of 15 (yes, 151 memories for
frequency storage and the smart part is that these are designated not
to 15 but 0-14. "So what?" sez you. "Aha" sez I, that means that if
you programme in all repeater channels from RO to R9 using memories
0 to 9, the memory channel display shows you the repeater channel
number whilst at the same time, the digital readout shows you your
transmit and receive frequencies. In addition to this, the memory
channels also store the repeater shift so that it's called up automatically
when you use the memory.
The remaining memories can be used to store any frequencies within
the band, but a further smart part is that memories 13 and 14 can store
completely separate transmit and receive frequencies for non standard
shifts etc. And memory 14 is also designated the priority channel so
that any frequency put into it can be constantly monitored at 5 second
intervals, whatever else the transceiver may be doing. And if you have
-
1
the volume turned down, a piezo bleeper alerts you if a signal has
appeared on the priority channel. You also have direct access to the
channel by simply pushing the "Priority operate" button.
Final features for repeater operation include a tone burst which can be
turned on or off as desired, and reverse repeater operation at the touch
of a button.
Now for more facilities pertaining to scanning. In keyboard operation,
you can scan the entire band in 25kHz or 5kHz intervals by simply
touching the SC button. In memory mode, you can scan all fifteen
memories using the same SC button. The scan system is (in my
opinion) the best yet offered in that the transceiver scans until a signal
is heard, stops on the frequency for about 5 seconds to allow you to
check what's on, then steps on automatically to find the next busy
frequency. If you want to stop the scan, simply press the PTT bar on
the microphone or touch the C (cancel) button on the keyboard. By
scanning this way, you eliminate the annoying locking up on busy
repeater channels that so often ruins your enjoyment of an otherwise
satisfactory scanning system.
In addition to scanning, the TR7800 can be stepped up and down the
band in 25 Khz or 5Khz steps using the UP/DOWN buttons on the hand
microphone. The microphone is supplied as a standard with the
TR7800. If either button is held down, the TR7800 tunes across the
band until the button is released.
The mic buttons also allow you to step up and down the memory
channels.
LED indicators show Simplex, +600 or -600 operation, a busy lamp on
occupied frequencies and "on air" indication. Signal strength and TX
output are indicated on an LED bar display.
Memory contents can be retained by installing four standard AA size
Nicad batteries inside the transceiver. The batteries are charged when
the TR7800 is switched on, and the memories are then retained for up
to five days on the batteries.
All in all, the TR7800 is an amazing transceiver and follows the Trio
design pattern for the 80s. Let's face it, Trio are now showing the way
to go and the others are truly a long way behind. Why not see the
TR7800 soon and test the truth in what I've been saying.
of
£ 198.95 inc
VAT
securicor carriage £4.50
The TR24O0 is a futuristic 2 metre FM handheld transceiver incorporating a large LCD frequency display, 400 channel operation from
144-146MHz, 10 memory channels and a host of frequency control
systems (including scanning) all designed around a microcomputer.
The sophisticated design makes the TR2400 the ideal handheld to
meet all repeater or simplex operation for the 2 metre man.
Don't forget, we stock almost everything that the keen DXer, short wave listener or
radio amateur could possibly need, including the complete range of J Beam aerials,
Microwave Modules equipment, feeder, clamps, insulators-in fact our catalogue makes
good reading for 48p and includes honest advice on aerial matters. For all that's good in
Amateur radio, contact Lowe Electronics at Matlock.
THE SHORT WAVE MAGAZINE
XXXVIII
Volume
533
LOWE ELECTRONICS Ltd.
Co)
HF SSB
TRANSCEIVER
£437 inc VAT
securicor carriage £4.50
The TS520SE standard specification includes CW wide/narrow switching
(using the optional 500 Hz filter), semi break-in keying with sidetone, PTT or
VOX operation, really effective noise blanker, switched AGC time constants,
5 function metering, switched RF attenuator, RIT, speech processing for
punchy transmit audio, fixed channel facilities, 25kHz calibrator, fan cooled
PA, internal loudspeaker, and of course the TS520SE will take all the wide
range of current matching accessories including the DG5 true frequency
digital readout, the VF0520S remote VFO unit, the SM220 station monitor
scope and panoramic display and so on.
When talking to prospective purchasers of the TS520SE, the question we are
most often asked is "how does it compare in price to its rivals?" and the
transceiver it is most compared with is the Yaesu FT1012 series. The price for
the FT101Z taken from March 1980 RadCom is £575 including VAT and you
also should add PA fan at £13.80 (the fan is standard on the TS520SE)
making a grand total of £588.80.
£437
THE TS520SE costs
including VAT.
Now tell me if that's not value for money.
of ever increasing complexity in amateur radio equipment, its
comforting to know that the TS520SE is still in volume production. Radio
amateurs all over the world (and dealers too) have voted the TS520SE "my
favourite transceiver" because of its astounding reputation for reliability,
high sensitivity receiver, and of course the unequalled Trio audio quality
coming from the transmitter. The TS520SE incorporates all of the features
demanded by today's amateur, and at an outstandingly low price. No
wonder it's top of the list in popularity, and comparison with other
transceivers will convince you that the TS520SE is the best value for money
In the face
on the market today.
Of course, the bare figures cannot tell you just how nice
the TS520SE feels in use, nor can they tell you the
pleasure of hearing other operators saying "never heard
better audio OM, what rig are you using?"
HF SSB TRANSCEIVER
£639.52 inc VAT
carriage by securicor £4.50
The new TS830S, the latest from TRIO. A high performance, very affordable
HF SSB/CW transceiver with every conceivable operating feature built in for
160 through 10 metres (including the new three bands). The TS830S
combines a high dynamic range with variable bandwidth tuning (VBT), IF
shift and an IF notch filter, as well as very sharp filters in the 455 kHz second
IF. Together with the optional VF0230 (remote digital display VFO) which
provides split frequency operation and 5 memories for frequency hold, the
amateur has available todays advanced technology linked to the proven
reliability and exceptional lineararity of a valve PA.
*
*
*
*
VBT variable bandwidth tuning
IF notch filter
IF
Shift
Various filter options
*
*
*
*
*
*
Built in digital display
6146B final with RF negative feed-back
Optional Digital VFO for increased flexibility
Innovative PLL system of frequency generation
RF speech processor
*
*
Adjustable noise blanker level
Adjustable audio tone
RF attenuator
*
RIT/XIT
SSB monitor circuit
Expanded frequency coverage
*
*
SEND 48p IN STAMPS FOR COMPLETE CATALOGUE AND ANTENNA BOOK
PLEASE SPECIFY ANY PARTICULAR INTEREST AND WE WILL SEND FULL INFORMATION
534
THE SHORT WAVE MAGAZINE
November, 1980
LÖWE ELECTRONICS Ltd
2 METRE
ALL MODE
TRANSCEIVER
£345 inc VAT securicor carriage £4.50
The 2 metre band, beacons, repeaters, FM simplex, FM repeaters, CW and
SSB. Single side band, a mode to conjure with, a decent location, either
fixed or portable, a beam antenna and a TR9000and the world, well given a
lift, Europe is at your fingertips.
Cast your eye over the front panel, Apart from the now conventional
RF/RIT, power/vol and high/low power controls, you will notice added
facilities.
There is the 5 channel memory which will store specific frequencies, one of
which will give a non standard repeater shift. Just the thing for net
channels and your local repeater.
On FM the rig will scan in 25Kc steps holding on each occupied channel. On
SSB the search facility can be used enabling 10Kc of the band to be rapidly
covered. Used in conjunction with the up/down shift switch on the
microphone the area of SSB search can be moved up and down the band in
10Kc steps thus enabling the entire side band frequencies to be looked at
quickly.
To enable quick reference to both FM and SSB sides of the band, that is 144
and 145MHz, two separate VFOs are provided thus for ease of operating
VFO A can be left around 145.00MHz and VFO Bon 144.00MHz.
So there we have it, a superb, simple to operate 2 metre multi mode rig that
can be used either in the car or at home as a base station. 10watts output
of high quality speech on SSB and FM, the hallmark of Trio signals on the
air.
LOWE FOR COMPUTERS
video genie
iyitem
The Video Genie system is a complete 16K computer, ready to
go, and ideal for all purposes.
It is programmed using the plain as English "BASIC" language,
and programs are stored on ordinary cassette tapes,
For £379,50 the Video Genie offers outstanding value for
money, just compare the price with equivalent cased kit
computers!
Also available from Lowe Electronics is a complete range of
software and computer peripherals.
16K User RAM
*
it
12K Microsoft BASIC
*
TRS-80 software compatible
Complete with internal cassette and PSU
*
VIDEO GENIE
£379.50 inc VAT
securicor carriage £4.50
*
Internal TV Modulator
* Fully expandable
* Powerful editor
* Huge range of software available
HEAD OFFICE AND SERVICE CENTRE
CHESTERFIELD ROAD, MATLOCK, DERBYS. TEL: 0629-2817 or 2430. TELEX 377482. OPEN 9.5.30 TUES -SAT. PHONE IN 9am-9pm
For personal attention on the South Coast contact John G3JYG, 16 Harvard Road, Ringmer, Lewes, Sussex. Ringmer 812071
For equally helpful attention in Scotland contact Sim, GM3SAN, 19 Ellismuir Road, Baillieston, Nr. Glasgow. 041-771 0364.
FOR ALL THAT'S BEST IN
HAM RADIO CONTACT US AT MATLOCK ANYTIME
Volume XXXVIII
THE SHORT WAVE MAGAZINE
535
AMATEUR ELECTRONICS UK
KEEP AHEAD WITH YAESU!
-
AS FACTORY APPOINTED DISTRIBUTORS WE OFFER YOU
WIDEST CHOICE, LARGEST STOCKS, PROMPTEST DEAL AND
FAST, SURE SERVICE RIGHT THROUGH
-
The exciting new FT -480R 2 METRE
MULTIMODE MOBILE represents the
very latest in state-of-the-art 2 metre
equipment. It incorporates features sadly
missing in 2 metre gear by other makers
and can be regarded as the definitive
model in its field. If you doubt that
statement all you have to do is to seek out
a proud owner!
359.00 Vat included.
f
YAESU FT -480
YAESU'S new FT -707 'WAYFARER' is an ultra compact HF solid state unit which has some of
the most advanced features available on HF gear
today and which includes the new band
allocation of 30. 17 and 12 metres. It has an
outstanding receiver performance and the noise
blanker makes mobile operating a delight.
Available also is the 12 memory channel VFO
FV-707DM and a rugged PSU for base station
operation. (Optional)
£500. 25 Vat included.
t"w= tti:25U.rJ.
da=r-.
# ##a#,%.
YAESU FT -707
SEE IT ALL
AEUK
AT LEICESTER ON STAND 38
- THE COMPLETE AMATEUR RADIO STORE
DON'T FORGET THAT WHEN YOU BUY FROM AMATEUR ELECTRONICS UK YOU ARE DEALING WITH ONE OF THE OLDEST
ESTABLISHED AMATEUR RADIO BUSINESSES IN THE COUNTRY
SEVEN OF OUR STAFF BEING FULLY LICENSED ACTIVE
OPERATORS. THE LATEST FULL TIME ADDITIONS TO OUR STRENGTH ARE JOE ROTHERY, G3RJR, WHO IS CHIEF SERVICE
ENGINEER AND WHO HAS A LIFETIME OF EXPERIENCE IN ELECTRONICS, AND FRED RENDELL, G4HXK, WHO YOU WILL FIND ON
OUR SALES FLOOR. BOTH JOE AND FRED, LIKE THE REST OF US, ARE VERY ACTIVE AND CAN BE HEARD REGULARLY ON THE
BANDS, THE POINT THAT WE ARE MAKING IS THAT AMATEUR ELECTRONICS UK IS AN ORGANISATION DEDICATED TO THE
AMATEUR RADIO HOBBY AND OFFERS YOU THE COMBINED EXPERIENCE OF LONG ESTABLISHED OPERATORS WHEN MAKING
THAT IMPORTANT AND FINAL CHOICE ON EQUIPMENT. REMEMBER ALSO, THAT YOU HAVE THE ADVANTAGE OF DEALING
WITH THE DIRECT IMPORTER WITH ALL THE BENEFITS THIS ENTAILS ON SPARES AND AFTER SALES SERVICE. IF YOU CANNOT
CALL IN FOR A FRIENDLY CHAT WITH US THEN WE GUARANTEE YOU THE FINEST MAIL ORDER SERVICE AVAILABLE ON THE UK
MARKET TODAY WITH OUR FREE SECURICOR DELIVERY FACILITIES. WHY NOT WRITE, 'PHONE OR CALL TODAY AND FIND OUT
EXACTLY WHY AMATEUR ELECTRONICS UK HAS THE FINEST REPUTATION IN THE BUSINESS?
-
NEW OFFICIAL YAESU PRICE LIST OVERLEAF!
508-514 ALUM ROCK ROAD
BIRMINGHAM
8
021-327 149.7
Telex 337045
6313
536
THE SHORT WAVE MAGAZINE
November, 1980
AE U K -- Your number one
AS FACTORY APPOINTED DISTRIBUTORS WE OFFER YOU NEW FACTORY APPROVED PRICES
E
Access or attractive
H.P. terms readily
available for on -the -
spot transactions.
Full demonstration
facilities.
Free
Securicor delivery.
'.{Irruss
AL.
F
HOW TO REACH US (EASY PRIVATE PARKING ON OUR 90ft. FORECOURT)
FROM SOUTH AND EAST. We are located approximately two miles from Junction 5of the M6from which follow signposts to Birmingham. Within V. mile turn
right at ClockGarage and proceed towards city. After one mile look for traffic lights at Fox Er Goose and immediately overthe lights take minor left fork into Alum
Rock Road. We are located one mile from this point.
FROM NORTH. Leave Meat Junction 6 (Spaghetti) and follow left fork down to traffic island beneath motorway complex. Take third turning off to Lichfield.
One mile further on follow A4040to the right and within t OOyds. veer again to the right, approximately one mile further on brings you to the Fox &Goose. Turn
right and see preceding directions.
FROM THE WEST AND SOUTH WEST. Follow M 6then Moto Spaghetti Junction lsee above) Alternatively, leave M5atjunctiort 4or 3and proceedto innerring
road. Turn South on ring road and leave on A47 (East). We are located three miles from this point.
.
Hours: 9.30-5.30 Continuous including Saturdays-Early closing Wednesday,
1
p.m.
Volume
XXXVIII
537
THE SHORT WAVE MAGAZINE
source for YAESU MUSEN
WE ARE PLEASED TO
ANNOUNCE A NEW PRICE
YAESU
STRUCTURE FOR YAESU
PRODUCTS WHICH GIVES
THE PURCHASER EVEN
BETTER VALUE FOR MONEY FOR AMATEUR
RADIO'S FINEST EQUIPMENT RANGE. NOW, FROM
THE WORLD'S NUMBER ONE MANUFACTURER
COMES THE OPPORTUNITY FOR EVERY OPERATOR
AND SWL TO OWN THE BEST ON THE MARKET AND
\v/
GONE IS THE
SECOND BEST.
NECESSITY FOR SETTLING FOR
H
£99.00 Vat incl.
FT -202. The ever -popular 2m FM hand-held. Superb value at
Every
Operator's
compare.
beyond
with
reputation
HF
Transceiver
a
Truly
the
B FT-901DM.
A
£799.25 Vat incl.
ultimate dream
C FT-225RD. No other 2 metre base -station can match the tried and proven FT-225RD Multimode
£499.00 Vat incl.
D FT -107M. YAESU'S pace-setting all solid state HF Transceiver. Now exceptional value
£690.00 Vat incl.
£887.80 Vat incl.
Complete with internal PSU and memory, only
E FRG -7. The finest value for money general coverage receiver available on the market today.
£ 199.00Vat incl.
Rugged and reliable and so many thousands in use
F FRG -7000. This the general coverage receiver for the man who insists on the best and only the
£299.00 Vat incl.
best
G FT -207R. The sophisticated 207 is still the best buy in synthesized 2 metre hand-helds at
£199.00 Vat incl.
H FT-101ZD. Don't settle for the rig with the add-on digital counter, settle for latest technology with
the world famous YAESU MUSEN FT-1OIZD HF Transceiver. Now superb value at£569.25 Vat incl.
STOP PRESS
- FRG -7700 NEW GENERAL COVERAGE RECEIVER NOW
IN STOCK!
-
for full details of all the new prices send today for
The above is only part of the story
the latest YAESU catalogue and leaflets. All you need to do to obtain all the latest
10-1
literature and our credit voucher value £3.60 is to send 36 pence in stamps
-a
winning offer.
AGENTS:
--
THANET ELECTRONICS LTD, GORDON, G3LEQ, KNUTSFORD. (0565) 4040.
NORTH WEST
ROSS CLARE, GW3NWS, 'GLENVIEW", NEWPORT ROAD, MAGOR, GWENT.
WALES Er WEST
(0633) 880146
EAST ANGLIA, Dr T. THIRSK (Tim) G4CTT,
AMATEUR ELECTRONICS UK
EAST ANGLIA
NORWICH. 06925 403.
NORTH EAST AMATEUR RADIO, DARLINGTON. 0325 55969.
NORTH EAST
COASTAL, CLIFTONVILLE, KENT.
AMATEUR ELECTRONICS, UK
SOUTH EAST
KEN McINNES, G3FTE, THANET. (0843) 291297, 9a.m.-10.30p.m.
-
508-514 ALUM ROCK ROAD
BIRMINGHAM
8
021-327
1497
Telex 337045
6 313
.v
538
THE SHORT WAVE MAGAZINE
WATERS &
STANTON
ELECTRONICS
18/20 MAIN ROAD, BOOKLET, ESSEX. Tel: 4X702)
20M1135
November, 1980
APPROVE.%
BUY WSE
IT MEANS A GOOD DEAL!
BE WISE
24 HOUR DELIVERY
FROM THE PEOPLE YOU CAN TRUST
1---
NEW TS13OS £491 Send for details
19.1.
TS120V £347
TS120S £432
CI
SOLID STATE RIG
RELIABLE. AT LAST
Up until now there has been a natural reluctance to accept solid state HF rigs as anything but a second
rig or mobile unit with dubious reliability of the PA devices. Now at last the new TS 120series gives you
8610 metre coverage at either 10 watts output or 1Q0 watts output. Digital readout and variable
selectivity are just two features that put them in a class above any other solid state rig we know of
lapart from the TS 1805)
even those costing nearly £ 1,000. The TS 120 will put to shame many of
the older valve PA designs and can confidently be regarded as a good reliable base or mobile station
and no tune-up means instant QSY from band to band at the flick of a switch.
-
-
TR7800
25W FM £268 Inc VAT
NEV
FM TRANS
We've looked at several FM transceivers in the f 250price bracket but really this
little unit beats them all. 5or 25W output, 15 memories, Auto -scan with lock -on
or pause, priority alarm call even when using another channel, led bar meter,
reverse repeater switch, dual rate tuning, remote microphone frequency
control, front panel key -board. Our units come complete with microphone,
mobile brackets, DC lead and manual, plus our usual 12 -month warranty.
eTRIQ
YOUNG
-
R1000RECEIVER
BUT VERY MATURE!
Every one is individually tested by us and
despatched by Securicor
f285 inc VAT
- NEW LOW PRICE!
WE STOCK EVERY MODEL
TEL: 0702 206835
FOR PRICES Et DELIVERY
eTRIO
2 METRE FM/SSB/CW
MOBILE OR BASE
TR2400 £ 198 inc VAT
ONLY
£345 Inc VAT
The new TR2400 really does eclipse all
other hand-helds in its sheer tech
nology. There's no other model that
can approach its performance. The
large LCD readout has low current drain
and the 1.5 watts output is a good
compromise between effective communication and reasonable battery
drain. 10 memories, automatic
scanning, instant reverse repeater
operation, 16 key touch-tone encoder,
144-148MHz etc etc ... all adds up to
the new leader in hand-helds
the
Trio TR2400. Get your Barclaycard or
Access cards ready for this one ... half
its fascination is operating it
the
other half is owning it,
...
-
£730
£491
The new Trio TR9000 heralds the beginning of a new era in 2 metre mobile or base Station operation.
A host of new features that makes its direct competitor look pretty expensive! FM has two tuning
rates either 25kHz or 12% kHz per step. On SSB the tuning rate is in 100Hz steps or with the search
button depressed, it will step in 1CkHz at the same time searching for signals within each 10kHz
segment. Dual VFO enables the operator to hold one frequency whilst searching for another. The
inclusion of five memory channels provides for the storage of your five favourite frequencies.
Built-in scan permits FM scanning 25 or 12%z kHz steps with momentary pauses on busy channels
whilst providing continuous scanning of SSB/C W over 2MHz. Positive or negative repeater shifts are
already programmed into the unit. For base station use, the PS20 AC supply can be used plus the
SP120 external speaker and the B0-9 system base plinth. An exciting rig at a very reasonable price.
Send today for details.
Volume XXXVIII
THE SHORT WAVE MAGAZINE
539
WATERS &
FDK VHF/UHF
FACTORY FRESH
STANTON
IMPORTED
ELECTRONICS
DIRECT BY US
18/20 MAIN ROAD, HOCKLEY, ESSEX. Tel: (0702) 206835
FDK MULTI-700EX
2m 25W OUTPUT
F D, K MULTI -750E
2m (Et 70cm) ALL -MODE
+ PRIORITY SCANNING
COMPARE THE PRICE
£ 199 inc VAT
Full coverage of the 144-146MHz band with facilities for 12. 5kHz steps
anywhere in the band.
Large four digit LED frequency display tuned in 40 x 25kHz steps in each
1MHz range.
A specially designed five stage helical -resonator assembly together with
the latest dual -gate MOSFET front end ensures excellent cross-modulation
characteristics.
Built-in crystal controlled automatic tone -burst with ±600kHz shift for
repeater operation and optional + 1 6MHz shift for use in conjunction with
FDK/MUV-430A UHF transverter.
Four additional priority channels -two diode matrix programmable in
12. 5kHz steps and two crystal controlled for any frequency between
144-146MHz.
Channel scanning of two chosen channels either synthesizer/matrix or
matrix/crystal.
Continuously variable RF output control from 1-25 watts.
Advanced PLL technology provides gpod stability with low spurious
output; integral power supply noise filter eliminates vehicle line noise and an
automatic protection circuit protects the RF output power module against
poor SWR, open or short circuit.
MOBILE SAFETY MICS
We have a shipment of safety mics due in by the time you read this
advert. The model 202S clips onto the lapel and comes with gear lever
control box at £20.95. Also coming is model 202H which has a neck
band and boom plus gear lever control box, incorporating up/down
frequency control and tx/rx switch, £29.95. These mics suit all
transceivers except the ICOM IC255.
AMAZING VALUE
£299 inc VAT
Simple and smooth VFO control gives either 1024iz or 5kHz stepson both
FM and SSB modes for optimum convenience.
The large green fluorescent display tube gives full frequency readout to
100Hz and provides safe and clear readout for both night and day operation.
Standard features include noise -blanker, RIT control with switch, RF
attenuator gain control, automatic crystal controlled tone -burst, high and
low power switching and remote up/down frequency control microphone.
unit.
Compare its compact size and light weight, its smart appearance and
comprehensive front panel controls. Simple and reliable operation is made
possible by employing advanced solid-state and logic techniques.
A dual VFO is employed for the selection of two independent frequencies
anywhere in the band. This also enables split frequency operation,
particularly useful when used in conjunction with the optional "UHF EXPANDER" transverter.
For normal repeater operation a pre-programmed shift is selected by front
panel selector.
M750 BUILDS INTO A 2m Et 70cm PACKAGE
(70cm module available late summer)
M750E
4--1-
UHF
EXPANDER
70cm
SP750
230V AC
FDK products are distributed by:
FDK UNITED KINGDOM, WARREN HOUSE, MAIN ROAD, HOCKLEY, ESSEX, ENGLAND.
THE SHORT WAVE MAGAZINE
540
WATERS &
STANTON
ELECTRONICS
REMEMBER -- WE CAN SUPPLY
MOST MAKES OF EQUIPMENT
CASH/CREDIT CARD OR
HP
AND WE DO HAVE A
FULLY STAFFED SERVICE
DEPT.
- -
TELEPHONE SALES (03704) 6835
11/20 MAIN ROAD, HOCKLEY, ESSEX. Tel: (0702) 206835
YAESU
- SALES PLUS
AFTER SALES SERVICE!
November, 1980
Den TronFACTORY
Il,
WE ARE SOLE
APPOINTED DISTRIBUTORS
(NEW FRG 7700 Receiver in stock)
FRG 7
RECEIVER
£ 189 inc. VAT
0. 5-30Mhz
IN STOCK NOW!
Den Tron
MLA 25006
160-10m 2kW PEP
£695 inc. VAT
and delivery
Free Securicor Delivery
Send 25p for complete
Den Tron HF Catalogue
FRG 7000
RECEIVER
SPECIAL PRICE!
Digital readout
0.2-30MHz
Securicor delivery £4.50 extra
NEW '6' VERSION NOW IN STOCK
FITTED HIGH/LOW POWER SWITCHING
* 1kW DC continuous
ALC circuit
3 speed cooling
*
*
*
*
*
*
Wattmeter (inc. p&p)
5'h" x 14" x 14"
Weight 471b.
Military specifications
Ideal for SSTV/RTTY
234v/117v AC
3rd order down 30dB+
2 of EIMAC 8875 tubes
* 40 watts drive for 1kW
160-10n ATU's also in stock
*
*
*
*
R.F.
Size
FT707 (10W) £472 inc.
FT707 (100W) £499vAT
12v DC transceiver
80-10 metres
plus New bands!
Free Securicor delivery
Den Tron
FT101Z £464 inc. VAT
FT101ZD £540 inc. VAT
160-10M transceiver
230v AC operation
Free Securicor delivery
"WELT" SUPER POWERISWR METERS
MT3000A
3kW ATU
Combines:
Antenna selector
RF power meter/VSWR
Dummy load (250W)
£275.00 ATU 160-10m
Matches anything to anything!
inc. VAT
(Includes coverage of new bands)
WHAT'S NEW IN HOCKLEY?
We always try to keep our stocks right up to date with all the latest models. If
you don't see it mentioned in our advert it may mean we just haven't got room
to mention it but with 4000square feet devoted to amateur radio the chances
are we have got it in stock. Remember we are only a telephone call away. And
here is just a few items coming into stock:YAESU FRG7700 Looks like being a real winner. 0.2-30mHz receiver with FM
and optional memory. 309 and £389.
FM MONITOR
Just stick it in the aerial lead of your FM transceiver and
monitor the demodulated audio. Completely self-powered. 15w max. £12.95.
BOOM
MICS.
Lapel clip version £20.95. Headband plus uprdown
SAFETY
frequency control £29.95.
Ideal for the short wave listener. Inverted
Glogal SHORT WAVE ANTENNAS
"L" type f9.95. Broad band dipole with coax 3-30mHz £29.95 Send for
catalogue.
DENTRON AT1-K 1kw 160.113n ATU/SWR Meter. Includes all new bands and
antenna switching. £99.
-
-
The new super Welz power/swr meters set a new standard. Each model has a
completely flat response within its range, and power sensitivity for full scale
deflection in swr mode of 2.5watts (yes even at 1.8mHzll Power readings are
really accurate and with a directional characteristic of over 30áb, the SWR
readings are spot on. Its not cheap but it does provide a reference standard to
at last you can find out the real
which all other models must be compared
truth about your swr and power output.
£49
MODEL SP2001.EmHz-160mHz20w(200wilkw.
£69
MODEL SP3001.8mHz-500mHz Z0w/200w/Ikw.
£49
MODELSP400130mHz-500mHz5w/20w/150w
-
-
-
-
Volume
XXXVIII
THE SHORT WAVE MAGAZINE
541
LARGEST STOCKS
WATERS &
IN THE SOUTH!
STANTON
THE HAM RADIO CENTRE
YOU CAN TRUST
ELECTRONICS
MAIL ORDER THROUGHOUT THE UK
IF ITS WORTH BUYING WE STOCK IT!
All goods despatched are covered by our own insurance
*
TRIO
£639.00
£437.0)
£17.25
£37.95
£82.80
£690.00
£679.00
£36.80
£95.46
-
AT200A.T.U.
R820 Receiver
TS1806 Transceiver
SP193 Speaker
AT180A.T.U.
TS1206 Transceiver
£43200
TS120 Transceiver
£347.00
£17.25
£28.75
£25.30
£89.70
£55.20
£44.85
£86.00
£128.80
£24.00
£13.8o
MB100 Mobile Mount
YK88C Filter
SP120 Speaker
VF0120 VFO
AT120A.T.U.
PS20 P.S.U.
PS30 P.S.U.
TL120Linear
MC50 Desk mic.
MC35S 50k mic
MC306 500ohm mic.
LF30A L.P. Filter
VHF/UHF
TS770E Transceiver
SP70 Speaker
TR9000 Transceiver
B09 Base plinth
TR7600
RM76
TR7800 Transceiver
TR2300 Portable
*
*
-
HOW TO ORDER
All prices on this page are carriage free for orders over £20unless otherwise indicated. For orders less
than this, please add £ 1 for carriage and insurance. Large items are sent Securicor, smaller items by
but if in doubt, please
post. Any item not listed can be supplied at normal advertised prices
telephone10702)2r
't.Orders may be placed by telephone on a credit card or sent by post in the form
of cheque or postal order. H.P. quotations can be given by telephone or letter and if you happen to
find our telephone lines engaged, don't despair, it's probably yet another customer who has decided
to buy from Waters and Stanton in the future.
-
-
YAESU Competitive prices
HF
FT -101Z Transceiver
£488.75
£569.25
£13.75
£8.60
£690.00
£101195
FTT-101ZDTransceiver
Fan
YE -7A Mic.
FT 107M Transceiver
FP-107E P.S.U.
£730.00
£18.40
£346.00
£3220
SC3 Carrying case
TR3200 Transceiver
MB1A Mobile mount
£499.00
£465.75
£109.25
FT -707 Transceiver
FT 7075
......... £268.00
TR 2400 Transceiver
ST1 Base stand
£1265
YM-35 Mic.
SPECIAL!
SPECIALI
£166.00
£49.00
£17.25
£6.90
£29.50
£ 198.00
£43.70
£11.50
£ 164.00
£9.20
,
*
-
£13.80
£18.40
VB2300 Amplifier
MB2 Mobile mount
RA1 Helical
PS1203 P.S.U.
`
-
We are located in the quiet village of Hockley
fresh country air, no parking problems and four miles
from the coast. We are situated between Rayleigh and Southend and are easily reached via A127 or A130.
All our prices include VAT -we consider retail advertising excluding VAT is deliberately misleading.
All servicing is carried out on the premises and we have full on-air demonstration facilities for HF or VHF on
our first floor.
Many products we sell are imported direct by us and we always have a range of new,
exciting products on show long before they reach other dealers shelves.
In six years we've become the
leading supplier of amateur radio equipment in the South if you want a good deal plus friendly after sales
service if something goes wrong, then call, write ortelephonefor latest pricesand delivery information. We
can supply virtually any make of equipment advertised in this magazine (except ICOM), usually from stock.
Over4,000aquarefeet of floorapace isstoc ked with all thetop names YAESU, TRIO, FDK, STANDARD,
DENTRON, JAYBEAM, MICROWAVE, MOSLEY, etc. Remember, if it's worth buying we stock it; so why
not come and see what we don't stock as well as what we do stock)
*
HF
TS830S Transceiver
TS520SE Transceiver
SP520 Speaker
YG3395C Filter
- no risk to the customer.
HINDS YOU SHOULD KNOW!
FP-707
BUYING AN FR7 OR
FRG7700 RECEIVER
We actually guarantee you the lowest price on
these two fines whilst present stocks last. If you
can find a genuine current offer below our prices
on new, fully guaranteed stock, send us a copy
of the competitors advertisement stating page
and date of publication together with your order.
Providing we receive your order within one
month of this journal's publication date, we'll
match it.
P.S.0
FT7B Transceiver
FP12 P.S.U.
FL-210CIZ Linear
FRG -7 Receiver
SPECIAL!
£78.20
£362.00
£M.00
FRG -7700 Receiver
£309.00
VHF/UHF
£359.00
£199.00
£149.50
£ 166.75
£201.25
FT480R FM/SSB
FT -2078
Hand-held
FT720
FT -720v
FT -720v
VHF MONITOR S
TM566 Amateur
TM 5613 Marine
SR9 Amateur
SR9 Marine
Bearcat 220 VHF/UHF
SX202 26'50oMHz Receiver ..
FX213 Aircraft
Sound VHF
Sound Hand-held
AP12 Aircraft
AR22 Amateur
.
£79.00
£79.00
£46.00
£46.00
£258.00
£240 00
£ 13.50
£69.00
£69.00
£109.00
£00.00
SUNDRIES
9502 Rotator
KR400 Rotator
AR4ORotator
Stolle 203) Rotator....
Stolle 2010 Rotator
MM202S Safety Mic
50ohm balun
Drake low pass filter
£43.50(2001
£105.8012001
£59.80 (1.501
£560011.501
£50.00(1.501
£20.95 (0.75)
£ 11.2510.501.
£18.4010.75)
DENTRON
'HF
MLA25008 21(w linear
Clipperton 'L' 2kw linear
GLA1WOB 1kw linear
MT3000A 3kw ATU
HF 200A Transceiver/PSU
Doublet Ant. 160-10m
470ohm Feeder 100ft. reels
1kw 1-66:10m ATU
£699.00
£459.00
£295.00
£27600
£399.00
£22.95
£11.50
£99.00
OUR REPUTATION IS YOUR GUARANTEE
ORDER WITH CONFIDENCE
Callers welcome. We are open 9-5.30 p.m. Monday - Saturday Ex. Wednesday 9-1.00 p.m.
Telephone orders - Simply phone in your Barclaycard or Access number and we will despatch goods within 24 hours.,
Mail orders - Send cheque or postal order for correct amount and print clearly name and address - we will do the rest!
Telex 995895 HDSG
WARREN HOUSE, 18-20MAIN ROAD, HOCKLEY, ESSEX.
Tel. 0702206835/204965.
542
November, 1980
THE SHORT WAVE MAGAZINE
Weitarn FOR HF TRANSCEIVERS ALL PRICES DOWN!
FT -707
0
Truly christened the "WAYFARER",
Yaes
solid-state transceiver
goes
or mobile, and
31cr
wc
"big rig" features together with
exceptional performance. 100WRF output; digital
readout; IF width control; LED 'S' and 'Power' meter
display; FULL band coverage, 9410 metres, including
3Qn, 17m and 12 m, this must be the transceiver all you
YAESU fans have been waiting fort
has all the desirable
YAESU
V
ONLY
Q
,I
µ
f
FP-707
AC PSU/Speaker
FC -707
Antenna Tuner
Scanning/Memory
Hand Microphone
Mobile Bracket
FV-707DM
YM-35
MMB-707
VFO
£99.00
E69.00
175.00
11.95
£12.50
-
-
:; TRIO
TS -120S
A very popular mobile or base station solid-state HF transceiver. Small in
size but big on features at a sensible price. This little gem from TRIOKENWOOD features digital readout, IF shift to beat the ORM, VOX and
break-in CW, 100W RF output on all bands 80-15 metres (slightly lower on
10m). Suberb value for an up-to-date HF rig.
+.%
'
do
y
PS-30
qe
MC -35S
SP -120
AC PSU
£79.00
Hand Microphone
£ 12.95
Matching external speaker£2250
£ 419
... OR IF YOU STILL PREFER 6146E3s IN THE FINAL ..
.
FT -101Z FROM YAESU MUSEN
TS-520SE FROM TRIO-KENWOOD
famous line, but what an improvement! Full band coverage, IF
width control for superior selectivity, excellent performance and
Yaesu's well-known quality. ZD model has digital readout built-in, both
models in excess of 100 watts RF out (lower on 1án1. Try our price for
It
Latest in
would be hard to find better value for an HF transceiver than the TS-520SE.
Covering all HF bands 160-10metres, it features 61468 in the PA; Wide/Narrow
CW switching (with optional filter); speech processor; high sensitivity and
dynamic range; RF attenuator and other features to make your operating a
pleasure. a first-class transceiver at a down-to-earth price!
a
size!
NOW DOWN -TO
w
479
£ 559 'ZD'
NOW DOWN TO
£ 415
d
-
z
z
o
...
THE
F-
Western ULTIMAST!
A NEW TELESCOPIC MAST FOR THE BUDGET -CONSCIOUS AMATEUR
Ever felt like having a tilt -over mast but thought you couldn't afford it?
Ever thought that the big lattice masts were too much when you only need support for your VHF/UHF antennas?
THE ALL-NEW 30ft'ULTIMAST' is the answer to your problems.
'Slim, unobtrusive appearance
*Telescopic and tilt -over
*One -winch operation
*Simple ground fixing
*Sell-supporting for large VHF antennas
*Inexpensive
'Can be guyed to increase loading capability
*Choice of head units (optional extra)
COME AND SEE IT AND ASK OUR ADVICE FOR YOUR MAST APPLICATION
ALL ADVERTISED PRICES INCLUDE VAT
3ICC
SEE YOU AT LEICESTER!
... AND NOW -
m
w
IN ADDITION TO THE'GOOD VALUE YOU SEE ON THESE PAGES,we will have plenty of EXHIBITION SPECIAL OFFERS at LEICESTER! Come early
or ask us about INSTANT HP. Also on
Bring your CREDITCFIARGE card
and avoid disappointment. Full credit facilities available on these offers
sale will be:
Masts and Towers
Antenna Switches
etc.
Power Meters
Plugs and sockets
VHF and UHF Antennas
Dummy Loads
etc.
Insulators
etc.
Headsets
HF Mobile Antennas
Microphones
etc.
HF Base Antennas
Dipole Centres
ALL THIS as well as TRIO and YAESU EQUIPMENT.
-
w
\
O
k-
- ACCESS/VISA ACCEPTED
(-\\1?IPRICE?
You'll not
O
eL
believe it!
Phone and
see how
low!
ow
2
o
ILi./ I-
Q
m
o
Volume
XXXVIII
THE SHORT WAVE MAGAZINE
543
Elecliorics (UK) ltd
GIVE YOUR ANTENNA A GOOD TURN WITH A
EMOTATOR
...
and the largest VHF/UHF arrays
Emoto 1103MXX As 1102MXX but slower rotation speed and
greater turning power
AND DON'T FORGET ...
The well known rotary mast bearing MB-300
---
£86.25
£125.35
-
-
-
£ 189.75
£ 29.95
£13.80
EXCLUSIVE! TWO NEW SCANNERS from
AT LEICESTER
Western
handle
0016
handle
0012
INTRODUCTORY
INTRODUCTORY
PRICE
PRICE
£199
£249
Two new VHF/UHF FM scanning receivers, manufactured to professional standards and available NOW, exclusively from WESTERN.
'Fully keyboard programmable for 8 or 16 channels
'Cover 68-88, 144-174 and 410-512MHz
*Full range scanning plus 16 channels (handle 0016) or 8 channel scanning (handlc 0012)
*AC and DC supply standard
*Channel lockout and memory backup
*Built-in telescopic antenna; external antenna jack
ALL PRICES INCLUDE VAT AND FREE DELIVERY
Western Electronics ono ltd
HEAD OFFICE (All Mail/Enquiries)
FAIRFIELD ESTATE
LOUTH, LINCS LN11 OJH
Tel: Louth 105071 604955
Telex: 56121 WEST G
-
-5
£194.35
SEE THEM
ROTOR
Due to high demand, our first consignment of these excellent rotors sold
out very quickly. We hope to have new stocks available in time for
Leicester. Specifications are:
Mast size
28-44 mm
Supply
220'240VAC 5CHz
Motor
24VAC
Max. antenna weight
50 kg
Rotation
0.25 mr
360° 1+5°, -0°)
Wind area (max.)
in 60 secs.
Braking torque
1000 kg -cm
Cable
-way
Silent control box, lower bracket included, good value at
CHOOSE 'EMOTO' FOR VALUE AND RELIABILITY .. .
WE ARE THE SOLE U.K. DISTRIBUTORS!
Models 103SAX and 502SAX (illustrated) now have 360° circular dial
presentation.
Emoto 103SAX For light HF and large VHF arrays
Emoto 502SAX For heavier HF beams plus VHF/UHF
Emoto 1102MXX The really big one for large HF monobanders
Mt»
Our Agents
Southern: Alan Paxton, G4BIZ, Southampton, Hants
(0703) 582182
Scotland: Jim Henderson, GM4HKW, Falkirk (0324) 25559
N. Ireland: Les Lyske, GI3CDF, Newtownards (02471 812449
Opening hours:
LOUTH: 9-12: 1-5pm Mon -Fri. By appointment Sat 9-12.
LEICESTER: May's Hi-Fi, Churchgate ITel: 0533-58662).
Mon -Sat 9.6pm; closed Thurs.
544
THE SHORT WAVE MAGAZINE
This
Thanet Electronics for ICOM
amateur's
the
professional friends
month
showing you:
we are
- Highly popular Amateur Band Transceiver
and GENERAL COVERAGE RECEIVER.
IC240 - The best value for money in synthesized rigs.
IC720
Thela 7000E
computer.
1
November, 1980
C202S
IC402
- An outstanding communications
-
IC2E
Probably the smallest made, extra sensitive
handy talkie.
IC251 E
Must be the best value in 2M base
stations.
IC255E
great value 25W mobile transceiver.
IC260E
The ideal choice for multimade mobile.
-
-A
-A pair of magnificent sideband portables.
-
On these, and all our other products:
we offer a full year's warranty on all parts and labour * All prices including V.A.T.
* Free delivery for all transceivers, using registered'first class post
H.P. and Part Exchange welcome
IC -720 The "Masterpiece"
112
in modern
communications
MEP=
-
err
.... Nora ta.yaecesrrs
Il2lat'
ac--iºc
aa tee m1a mla c, ail nee ism
wzea sin z:wa.:.sir
An exceptional 9 -band HF transceiver
for less than £700.INCL.
The "Masterpiece's" signal purity and superior receiver keeps you abreast of the
advancing technologies and incorporates features wanted by amateurs worldwide.
SPECI FICATION
General
Transmitter
FREQUENCY COVERAGE
RECEIVE:
0.1
30.0MHz
TRANSMIT:
1.8
1.999MHz
3.6 4.099M Hz
7.499MHz
6.9
10.0- 10.499MHz
13.9- 14.499MHz
17.9
18.499MHz
20.9 21.499MHz
24.8
26.000MHz
28.0 28.999MHz
29.0 29.999MHz
Temperature
-10°C +60°C
-10°C + 60°C
Limitation:
Antenne
50 ohm
Emission Mode:
Impedance:
Power
Requirement:
50 ohm
Microphone
Imp:
Current
Drain:
Min audio output 0.9A.
Max audio output 1,2A
TRANSMIT: SSB 16A, CW,
RTTY 20A, AM 14A
-
-
Output Power:
-
-
DIMENSIONS:
Modulation
System:
Spurious
Output and
Harmonic Output:
Carrier
S nptession:
U anted
Sideband:
-
13.8v DC, neg. ground,
-15%
111 (H) x 241 (WI x
311 (D) mm.
RECEIVER
CWIA1), RTTVIF11,
SSB)USB/LSBI, AM
100W Continuous
(AM 40W)
SSB, AM Balanced
Mod. CW, RTTY
reactance mod.
More than 60 dB
below peak power
output
More than 40 dB
below peak power
More than 50 dB
down at 1000Hz AF
Receiving System:
Receiving Mode:
Intermediate Freq.:
Sensitivity:
Spurious Response:
Rejection Ratio
Selectivity:
Output
1.3K Ohm, dynamic
with built in pre -amp.
Superhetrodyne,
with continuous band -width control.
Al, A3J (USB/LSB), A3, F1.
1. 39.731
MHz
2.
9.0115 MHz
3, 10.750 MHz
4.
9.0115 MHz
Less than 0.25 micro volts for 10dB S h N/N
Better than 60d9
SSB, CW, RTTY + 1.15kHz at -6dB
(Adjustable to '- 0.4kHz min)
_ 2.1kHz at -60d0
CW Narrow (option)1.250Hz at.6dB
_ 750Hz at -60d0
AM (without filter) +_ 3kHz at -6dB
_ 9khz at -6049
with filter + 2.6kHz at .6dB
6kHz at ú0d8
Audio Output:
More than 2 watts
Audio Impedance:
8 ohms
Due to the popularity of this model we apologise
if there is any delay in delivering
Also available from our shop in Herne Bay are:
* MICROWAVE MODULES ' * WESTERN
* ANTENNA SPECIALISTS
* J -BEAM
* G -WHIP
* YA ESU MUSEN
* RSGB PUBLICATIONS
* VIDEO GENIE COMPUTERS
* BEARCAT
* Come and visit us at The LEICESTER EXHIBITION, GRANBY HALLS,
6-8 NOVEMBER
STAND 17.
We will gladly show you any of the products and answer your problems!
-
IMPORTANT
would like you to phone, or write to us so that we can give
as much detailed information as possible on any particular
product. Use our 24 hour ansafone when calls are cheap.
We
you
Thanet for
ICOM
143 RECULVER RD.,
BELTINGE,
HERNE BAY, KENT.)
Tel: 02273/63859
fib
VISA
Volume XXXVIII
THE SHORT WAVE MAGAZINE
545
The IC -240 - The start of a revolution in 2 meters transceivers
SPECIFICATIONS
GENERAL:
Semiconductor Complement:
Transistors
34
PET
£
*
Easy channel selection
twiddling
*
9INCL.
Frequency Range (for
vl xent
33 to 128 depending
on channels
144-148MHz
13.8 VDC Negative Ground
TX
2.0AMP at lOW
RX
700MA at MAXte Audio
400MA Squelched
Semm (hs x 150mm (wl x 218mm (al
1.9 kilograms
ecif cation)
Current Consumption
with minimum knob
- yet with all the normal FM
channels available
feature.
*
13
Diodes
Sire
Weight
Antennas Impedance
Number of. Channels
- an all important safety
A fully automatic tone burst which operates
only in repeat mode with NO buttons to press
either on the front or on the back of the set.
Instant reverse repeat at the flick of a switch
without any re -tuning or memory programming.
A very sensitive receiver with a spurious
response performance far better than the
average and a very clean transmitter with
excellent clear, crisp modulation. (We measured
a sensitivity of 0.1 uy pd forlOdB sinad).
50 OHMS
22 channels selected from any of the 80
channels on 25KHz spacing.
Frequency Control
Stabilized Mesta, oscillator PLL
programmed by diode matrix.
TRANSMITTER:
Pourer Out
Deviation
Microphone Impedance
10 watts
SKHz
500 OHMS
Lover than -60d8 below carrier
Spurious Level
RECEIVER:
Modulation Acceptance
Typa
F3
Double Superher,
Receiver Sensitivity
1
;12,1i.
F. 10.
12zz,
d5kHz
300e of better
60dsB or better
80ò or rnore attenuation
Microvolt SvN/N
Spurious Response
Bendpees
Squelch Sensitivity
Hz/d6000
m
microvolt
OPUS
1
watts or more into BOHMS
Tono Theta 7000E
A great computer
on offer from Thanet
The new THETA 7000E means that every Amateur
can enjoy the visual display of CW, RTTY and
ASCII in both transmit and receive modes. Just
connect the TONO to any TV set via the antenna
terminals or to a page printer from the parallel
port provided. Bring up your CW speed in receiving
or sending by either watching receiver sent or
from recorded cassettes. Connection to the
transceiver is via the key, phone and mic sockets.
Some of the Outstanding Features
COMMUNICATIONS COMPUTER THETA 0-7000 E
0-7000E
UHF and Composite Video Output
Printer
interface * Wide range of transmitting and receiving
10CW speeds + BATTY a Built-in
speeds
demodulator for high performance for 170, 425
and 820 Hz shift
Crystal controlled modulator
for ASFK Hi or Lo tone Convenient ASCII
key arrangement * Large capacity display memory
-
-
'
'
IC -202S
£169i1NCL.
-2 pages 32chr
x 16 lines split screen for Rx &
Tx if required ° Automatic transmit/receive
switch
Anti -noise circuit a Battery backed -up
memory 7 channels of 64chrs Send function
Buffer memory 53 character type ahead, rub
out function * Simultaneous access of the memory
-
- 53 character type ah
* Word Wrap around function
Transmit/receive
in ASCII mode or RTTY
CW indentification
function * Mark and break (space and break)
system
Monitor circuit & CW practice function
'
'
Variable CW weights
Cross pattern checking
output terminal ' Log computer output provided
* Test message function (Ry and 08F),
LF (line feed) cancel function * Cursor control
function Word mode operation * Automatic
Phone or write for the price list of accessories for
CR/LF (72, 60 or 80 chrs per line)
Echo function this unit.
What a
tremendous
IC -402
£242'INCL.
pair
TheIC-202S is a very well designed 2m SSB portable. It
offers: 3W pep output on USB, LSB and CW. * Large Battery
capacity (HP1 type) or Nicads if you wish * A special VXO
circuit to provide smooth tuning and crystal stability needed
for SSB operation on 2m * Each of the four 200kHz band
positions allows operation anywhere in 2m. (Supplied with
144-144.2 and 144.2-144.4) * Top of the band Oscar xtals
available for "cross -pond working" * It has a DC socket
and S0239 sockets for mobile or base station working,
barefoot or as a prime mover a Mobile mounting brackets,
Nicad packs, chargers, cases all available options. You must
agree, a very versatile well proved rig.
Their versatility is well worth an enquiry.
1
Thanet for
ICOM
The 70cm twin of the
202S having very similar
features, covering the
frequency range of 432435.2 MHz.
VISA
November, 1980
THE SHORT WAVE MAGAZINE
546
The more you hold it
the more you enjoy it the
IC -2E Handy Talky
CHECK THE FEATURES
-
£1591NCL,
-
+5kHz SWITCH
adds 5kHz to the
indicated frequency.
DUPLEX SIMPLEX SWITCH gives
9V rechargeable battery pack as supplied
simplex or plus 600kHz or minus 600
kHz Transmit.
but lower or higher output available
HI -LOW SWITCH
reduces power outwith the optional 6V or 12V packs.
put from 1.5W to 150mW reducing
BNC ANTENNA OUTPUT SOCKET
50 ohms for connecting to another
battery drain.
antenna or use the Rubber Duck supplied. EXTERNAL MICROPHONE JACK
If you do not wish to use the built-in
supplied.
SEND/BATTERY INDICATOR Lights electret condenser mic an optional
microphone/speaker with PTT control
during transmit, but when battery power
can be used. Useful for pocket operation.
falls below 6V it doesn't light indicating
EXTERNAL SPEAKER JACK for
the need for a recharge.
speaker or earphone.
FREQUENCY SELECTION by
This little beauty is supplied ready to go
thumbwheel switches, indicating the
complete with nicad battery pack,
frequency.
charger, rubber duck.
FULLY SYNTHESIZED covering
144-145.995 in 400 5kHz steps.
POWER OUTPUT
1.5W with the
-
-
-
-
-
-
-
-
-
SPECIFICATIONS:
Transistors 4,
-
FETs 3, ICs 6 Diodes 21.
Frequency coverage 144-145.995 but will go to 147.995
Frequency Resolution 5kHz steps,
Frequency control by digital PLL synthesizer with
thumbwheel switches.
Frequency stability within
1,5kHz.
Useable temperature -10 degrees C to 60 degrees C.
Antenna Impedance 50 ohms.
Power supply requirements DC 8.4V; with attendant
battery pack DC 7.2 10.8V negative ground is acceptable
t
-
Current drain at 8.4V
Transmitting:
High 1.5W
Low 0,15W
Receiving at max audio output
Squelched
Approx
Approx
Approx
Approx
550 MA
220 MA
130 MA
20 MA
Transmitter output power High 1.5W, Low 0.15W at 8.4V.
Mode F3, variable reactance frequency modulation, + 5kHz,
Spurious Emissions more than 60dB below carrier.
Microphone built-in Electret condenser, Optional Speaker Mic
can be used.
Operating Mode, Simplex or Duplex + 600kHz from
receive frequency.
Receiver Double Conversion superheterodyne FM.
Intermediate Frequency 1st 10.695MHz; 2nd 455kHz,
Sensitivity Better than 0.3uV for 20d6 noise quieting.
less than 0.3uV.
Squelch sensitivity
Squrious response Rejection ratio more than 60dB,
Selectivity More than + 7.5kHz at -6dB point
Less than + 15.0kHz at -60dB point
Audio output More than 300mW8 ohms.
Tonecall Crystal controlled.
-
It will seduce you
in it's own way
the ICOM IC 251E
£4791NcL,
only
-
-
CONTINUOUS TUNING SYSTEM Icom's new continuous OUTSTANDING PERFORMANCE The RF ampliar and
tuning system features a luminescent display that follows the first mixer circuits using MOS FETº and other circuits
tuning knob movement and provides an extremely accurate
provide excellent Cross Modulation and Two-Signal selectivity
readout. Frequencies are displayed in 7 digits representing
characteristics. The IC251 E has excellent sensitivity demanded
100 Mhz to 100 Hz digits.
especially for mobile operation, high stability, and with
Automatic re -cycling restarts the tuning at the bottom of the Crystal Filters having high shape factors and exceptional
and vice versa. Quick tuning selectivity. The Transmitter uses a balanced mixer in a
MICROPROCESSOR CONTROL
CPU control with loom's band when the top is reached
at the bottom et the band when the top is reached
original programs provides various operating capabilities.
single conversion system, a band pass filter and a high
No backlast dial controlled by Icom's unique photo -chopper the SSB and CW modes, and 5 KHz steps and KHz steps in performance low-pass filter. The system provides distortionthe FM mode, is provided for trouble free use.
free signals with a minimum spurious radiation level.
circuit. Band edge detector and Endless System provides
The
EASIER OPERATION AND LIGHTER WEIGHT
out -of -bend protection. No variable capacitors or dial gear,
most compact, lightest weight all-mode 144 MHz transceiver.
giving problem -free use. The IC251 E provides FM, USB,
First to use a pulse power supply in communication equip
LSB, CW coverage in the 144146 MHz frequency range.
t, for lighter weight and cooler running. 50mm-diameter
Thus the IC251 E can be used for mobile, DX, local calls, and
large tuning control knob for smooth and easy tuning.
satellite work (easily extended to 148 MHz).
MULTI -PURPOSE SCANNING Memory Scan allows you Trouble-free controlling knobs for both receiving and
transmitting. LED indicator for transmit and receiving modes.
to monitor three different memory channels. Program Scan
MOST SUITABLE FOR BOTH FIXED AND PORTABLE
provides scanning between two programmed frequencies.
Adjustable scanning speed. Auto-stop stops scanning when a STATIONS Built in 240V AC and DC power supplies.
Convenient Dial Lock switch for mobile operation. Easy
signal is received in all modes.
carry handle. Effective Noise Blanker. IC-SMS high quality
DUAL V FO's Two separate V FO's can be used either
independently or together for simplex operation, and any
stand microphone is suitable for fixed station operation.
Powerful audio output 1.5 Watts at a ohm, for easy listening
desired frequency split in duplex operation. Automatic
600kUz shat available on switch -on.
even in noisy surroundings.
AFTER YEARS OF SUCCESS THE IC -211E HAS NOW
BEEN REPLACED BY THE IC -251E. NOT JUST A FACELIFT, BUT A NUMBER OF IMPORTANT DEVELOPMENTS HAVE BEEN INCORPORATED.
-
-
1
-
-
-
SEND FOR MORE DETAILS ON
TECHNICAL CHARACTERISTICS.
-
-
Thanet for
ICOM
Mann
Volume XXXVIII
THE SHORT WAVE MAGAZINE
547
IC -255E -
An experts mobile
choice
25 Watts
-5 Memories - Scanning - 600kHz
AND User Selectable Repeater Shift
*
*
*
Crystal controlled Tone Burst
Full band coverage extendable to 148MHz if required
Four digit LED display
25 Watts output or 1W low power
A superb receiver using grounded gate FET front end
Scanning over a user programmable range
Memory scan
Stop on empty or busy channels
Tuning in 25kHz or 5kHz steps
5 Memories
retained while the power is connected to the rig *
Built-in 600kHz Repeater Shift
-
-
- Full Coverage in 5kHz or 25kHz Steps.
Alternative programmable shift
Reverse Repeater facilities
RIT (± 3kHz for those off channel stations)
Scan control from the microphone (optional mic available)
Good loud audio
Optically coupled tuning between control knob and CPU
Multiway 24 pin socket on back for touchpad, computer, or external control
Rugged modular PA (Guaranteed of course!)
Mobile mount which can be padlocked
Up -down scanning microphone available
CAN YOU RESIST SUCH A TEMPTATION
EnjoyVHF mobile
at it's best -IC-260E
Replacing the IC -245E, the IC -260E offers such extras as
full frequency read out, upper and lower sideband, and
as well as FM and CW. Thus, it makes an ideal base
station, when used with a DC power supply, as well as a
mobile. The use of a microprocessor instead of an LSI chip
has enabled Icom to offer this at a lower price than the
IC -245E.
scanning
144MHz ALL-MODE TRANSCEIVER INCORPORATING A
CPU control with loom's original
MICRO -COMPUTER
programs provides various operating capabilities. No backlash
dial controlled by Icom's unique photo -chopper circuit.
Band edge detector and Endless System provides out -of -band
protection. No variable capacitors or dial gear, giving problem free use. The IC -260E provides FM, USB, LSB, CW coverage
in the 144-146MHz frequency range. Thus the IC -260E can
be used for mobile, DX, local calls and satellite work. Easily
extendable to 144-148.
MULTI PURPOSE SCANNING Memory scan allows you
to monitor three different memory channels. Program Scan
provides scanning between two programmed frequencies.
Adjustable scanning speed. Auto-stop stops scanning when
a signal is received, in all modes,
Two separate VFO's can be used either
DUAL VFO'S
independently or together for simplex operation, and any
desired frequency split in duplex operation,
'corn's new continuous
CONTINUOUS TUNING SYSTEM
tuning system features an LED display that follows the tuning
knob movement and provides an extremely accurate readout.
-
-
-
-
AGENTS (PHONE FIRST
Frequencies are displayed in 7 LED digits representing
100MHz to 100Hz digits. When in Duplex and using the
tuning -knob the two VFO's track together. Automatic
recycling restarts tuning at the top of the band, i.e. 145.999.9
MHz when the dial goes below 144.000,0MHz, Recycling
changes 145.999MHz to 144.000.0MHz as well. Quick tuning
in 1kHz steps is available, and fine tuning in 100Hz steps in
the FM mode, is provided for trouble -free OSO.
OUTSTANDING PERFORMANCE The RF amplifier and
first mixer circuits using MOS FET's and other circuits
provide excellent Cross Modulation and Two Signal
Selectivity characteristics. The IC -260E has excellent
sensitivity demanded especially for mobile operation, high
stability and with Crystal Filters having high shape factors
and exceptional selectivity. The transmitter uses a balanced
mixer in a single conversion system, a band pass filter and a
high performance low pass filter. This system provides
distortion free signals with a minimum spurious radiation
level for an output of 10W or more.
ADDITIONAL CIRCUITS The IC -260E has a built-in
Noise Blanker, CW Break-in CW Monitor, APC and many
other circuit9for your convenience. The IC -260E has everything you need to really enjoy VHF operation, in an
extremely compact rugged transceiver.
-
-
- All evenings and weekends only, except Barnsley and Burnley)
Scotland
Jack GMBGEC (031-665-24201
Wales
Tony GW3FKO (0874 2772)
Burnley
(0282 38481)
Midlands
North West
Yorkshire
Tony GBAVH (021-329 23051
Gordon G3LEQ (Knutsford 10565) 4040)
Peter G3TPX (022638 2517 Evenings) (0226 5031 Day)
548
THE SHORT WAVE MAGAZINE
November, 1980
FRG -7700
COMMUNICATIONS RECEIVER
IT IS RATHER UNUSUAL TO HAVE SO
MUCH SMALL PRINT IN AN ADVERTISEMENT LAUNCHING A NEW
RECEIVER BUT THEN THIS IS AN
UNUSUAL RECEIVER!
General Coverage
From 30MHz to 150KHz (and at
reduced spec down past 60KHz to
almost DC!) in 1MHz bands selected
by a 40 way rotary switch calibrated 0-29 plus 1, 3, 7, 10, 14, 18,
21, 24, 28 and 29 for easy amateur
band changes.
Ease of use
No preselectors! The use of the
latest up conversion circuits with a
48MHz first IF and professional
grade crystal filter plus dual PLL
system provides automatic selec-
tion of the input band-pass filter
direct from the band sector or
memory.
All Modes
SSB, (USB and LSB), CW, AM and
FM. The inclusion of a N.B.F.M.
detector and squelch opens new
horizons. On 10n FM Simplex plus
repeaters, and with a convertor,
Marine, P.M.R. Lab use, and of
course, the VHF/UHF amateur
bands, where the high quality noise
blanker will be found to be most
efficient.
Selectivity
4 filters fitted as standard! SSB,
2.7KHz and FM 15KHz. For AM, 3
positions! Narrow 2. 7KHz, Medium
64(Hz and Wide 12KHz, which with
the tone control, and switchab!e
AGC provides the operating flexibility demanded by discriminating
BCL's in today's crowded bands.
Sensitivity
Fraction of
microvolt sensitivity
provided by the latest 35K 73 mosfet
makes the best use of inefficient
aerials for those difficult locations.
A 2odB switchable attenuator and
a continuous RF attenuator on the
front panel minimises problems
with very powerful stations.
a
FRG7700 £309
Prices Include VAT 15%
The VFO has both
a
pleasing
bright, but dimmable digital
readout and a back illuminated
analogue scale. It is tuned by a
comfortable 13/4" knob with a 'fast
tune finger tip recess' through a
zero backlash slow motion drive.
The front panel is remarkably
uncluttered, clearly labled and the
controls in logical positions. The
illuminated meter is calibrated in
both conventional 'S' units (0-9
+20, +40 +60dB) and in SINPO
1-5 for broadcast station reporting.
Timer
An inbuilt quartz clock/timer is
featured. Time is displayed in 12
hour format (with AM/PM indicators) on the digital frequency
readout, ideal for accurate log
keeping. In the event of a mains
failure the clock will continue to run
(but does not of course, display) on
the memory back up cells. For use
with a tape recorder: - 3.5mm jack
provides 100mV of audio (irrespective of the position of AF gain
control) and relay contacts (15V
1A max) provide remote control.
t
FRG7700M £389
Free Securicor Delivery
This relay is switched by the timer
which may be programmed for
switch on/switch off (and snooze
allows up to 59 minutes of
listening after switch off.)
-
Memory (option)
12 frequencies anywhere within
the tuning range may be stored by
simply touching the M button and
then recalled by pressing the MR
button, no preselector adjustment,
no range switch adjustment. The
memory is tunable by ± 1KHz and is
kept alive year long by 3 'AA' dry
cells. The memory may be used for
storing all the frequencies of a
particular broadcast station, and
with a convertor, the common
marine channels, 2m FM channels
(switch between the VFO and
memory for repeater input/output)
etc.
World Wide Portability
Power:
Mains 240-220 VAC
-
easily adjustable 100-120V,
50/60Hz
supply.
Size:
-
Weight:
and 12V
13" x 5" x 9"
-
14lbs
DC
external
.
(with carrying
handle).
-
Speaker: Inbuilt 8 ohms, 1.5W of
AF. External 4-16 ohm unit. Y4"
phone jack for personal listening or
winkling out the weak ones.
Memory:
-
Going on a trip? Store
Radio 4 and all the BBC World
Services in the memory and keep in
touch with the news.
Memory Unit £83.95
2 Year Distributor Warranty
549
THE SHORT WAVE MAGAZINE
Volume XXXVIII
YAESU MUSEN
Transceiver, Mobile
Digital Readout
Power Supply
FF78
YC7B
FP12
Transceiver Analogue.... £425.00
£495.00
Transciever Digital
FT101ZD
£75.00
Readout Module
DIG101Z
£30.00
Invertor Kit
DCT101Z
£110.00
External V.F.O.
FV101Z
£205.00
V.F.O.
Synthesized
FV901DM
£17.50
Desk Microphone
YD148
£7.50
Hand Microphone
YE7A
£20.00
CW Filter 600Hz
XF89HC
£20.00
350-1z
Filter
CW
XF89HCN
£110.00
Antenna Tuner
FC901
£380.00
CW/RTTY Reader
YR901
100.00
CW/RTTY Keyboard
YK901
£8.50
Modulator
VHF TV
MODR901
£15.50
6QnA Loop Kit
60MAR901
£125.00
Video Monitor
YVM1
£235.00
Transvertor c/w 2m
FTV901(2)
£155.00
430V107V901 70cm Module
£60.00
50J10N901 6m Module
£75.00
4m Module
70V107V901
Monitorscope c/w Pan.... £270.00
Y0901P
£230.00
Monitorscope
Y0901
£45.00
Panadaptor Kit
PAN0901
£45.00
Speaker c/w Patch
SP901P
£25.00
Speaker External
SP901
£315.00
Linear Amplifier
FL21032
WIZ
f
Transceiver Digital
Extenal V.F.O.
FV107
Antenna Tuner
FC107
PSU/Speaker
FP107E
Internal 12V PSU
FP107
Transvertor Frame
FTV107
Transvertor c/w 2m
FTV107121
144V 107V901 2m Module
501107V901 6m Module
43 1107V901 70cm Module
Speaker c/w Patch
SP107P
External Speaker
SP107
AM Filter 19(Hz
XF89GA
CW Filter 600Hz
XF89HC
7
XF89HCN
YM34
YM35
YM36
YM37
DMST1O7
CW Filter 350Hz
Desk Microphone
Tuning Microphone
Noise Cancel Microphone
Fist Microphone
Digital Memory Module ..
f
.
.
12V Battery Eliminator
HD Leather Case
Xtals. Stock
"AA" Size 500mA
}207
FV901DM
FC902
MODR901
YVM1
FTV901(2)
430/901
5W107V901
70V107V901
Y0901P
Y0901
PAN0901
SP901P
SP901
FL21002
YK901
Headphones
Low Pass Filter
Quartz Time Clock
12A PSU
4A PSU
Mobile Speaker
YH55
FF501
QTR24D
FP12
FP4
FSP1
....
£18.00
Pair£435
Each £0.87
.. £ 173.04
£16.50
£34,50
£6.50
£14,50
£18.00
Fast Charger/Eliminator
Small Charger
Ni Cd Pack
HD. Leather Case
...
£225
Battery Charger/Adaptor
£14.50
12V Battery Eliminator
T.B.A.
Mobile
External Speaker/Microphone£ 14.50
FI-225R
FT225RD
Transceiver Deluxe
MEMT225
Transceiver
DIST225
£620.00
Transceiver
£24.00 FT227
FM Module
£2400 FT227RXS
Keyer Module
£75.00 FT227RBST
Memory Module
£30.00
Invertor Kit
£206.00 FT404R
Synthesized V.F.O.
f110.00-FTp
Antenna Tuner
'
£380.00 Xtals
CW/RTTY Reader
£15.50
60mA Mod Kit
£8.50
VHF Modulator
£125.00 Fr480
Video Monitor
£235.00 FT480R
Transvertor c/w 2m
£155.00 FP8Q4
70cm Module
£60.00
6m Module
£75.00 Fr720
4m Module
Monitorscope c/w Pan... £270.00 Fr7206
£230.00 S72
Monitorscope
£46.00 E724
Panadaptor Kit
£45.00 E72L
Speaker c/w Patch
£25.00 720RV
Speaker External
£315.00 720RVH
Linear Amplifier
£100.00 720RU
CW/RTTY Keyboard
MMB3
.... £390.00
.... £433.91
Tx/Rx Multimode 2m
Transceiver 2m Digital
Memory Module
Digital Display Module
£80.00
£50.00
Tx/Rx 2n c/w Scanner... £250.00
Tx/Rx 2n c/w Stepper.... £245.00
2.5W Handheld 70cros.... T.B.A.
pair £4.35
Stock
Accessories as FT207R
Tx/Rx 2m SSB/FM/CW
Power Supply
... £31217
T B.A.
£130.00
£48.00
£20.00
£23.65
£ 145.00
£ 150.00
£ 175.00
£4.35
Control Box
Switching Box
Extension Cable
Extension Cable
Deck 2m 1Wy
Deck 2n 25W
Deck 70cm 10W
Mounting Bracket
FRG7
6
£173.04 FT780R
£216.52 FT7
£4.35 FP804.00
Rx 0.5-30MHz
FRG7 + SMC Readout
£1200 FRG7D
£750 BHRG7
Battery Holder
Tx/Rx 70cm SSB/FM/CW
Power Supply
CPU2500
ACCESSORIES
Power Meter/Load
YP15O
.
£16.50
Handheld 12h KHz Snyth
Mains Charger
é
FT901
FT901DM
FT901D
FT901DE
FMVT901
KEYT901
MEMT901
DCT901
£600.00 60MAR901
£80.00
£86.00
£93.00
£85.00
£96.00
£180.00
86.00
£60.00
£155.00
£48.00
£24.00
£20.00
£20.00
£20.00
£18.50
£11.00
Handheld 1W. 6Ch 2m
£86.09
External Speaker/Microphone. £14.50
£16.50
Mains Charger
£405:00 M202R
24
£435.00
£95.00 NC1
FP707
£65.00
FC707
£ 155.00 FLC1
FV707DM
£13.00 Xtals
Rack Unit
MR7
£13.00 NiCDS
Mobile Bracket
MMB2
£ 19.00 FT2I17R
Switching Box
FRB707
£20.00
CW Filter 600Hz
XF89HC
XF89
CW Filter 350Hz
£2a00 NC1A
£18.50 NC2
Desk Microphone
YM34
£11.00 NC9
Tuning Microphone
YM35
yM36
£1200 NBpg
Noise Cancel Microphone
Fist
Microphone
YM37
zr
FLC2
Transvertor Frame
FTV107
£96'"' FBA1
£180.00 PA2
Transvertor c/w 2m
FTV107
£88.00 MMB10
144V 107V901 2m Module
£60.00 YM24
6m Module
50V107V901
£ 155.00
430C107V901 70cm Module
Transceiver 10W
Transceiver 1001.1Ú
Power Supply
Antenna Tuner
Digital V.F.O.
YR901
FT107
1
FT202R
£346.96 Fr707
£59.00 FT707S
£68.00 FT707
FT101
F -I
VHF EQUIPMENT
HF EQUIPMENT
HF EQUIPMENT
FRG7000
£55.00 FRG70c0
£9.00
£17.35
£21.70 FRG7700
£68.00 FRG7700
£36.00 FRG7700M
£8.65 MEMRE7700
FREE SECURICOR DELIVERY
Tx/Rx
Tx/Rx
Tx/Rx
Tx/Rx
Tx/Rx
£258.70.CPU2500RKSt Tx/Rx
£33826 CPU2500RKS Tx/Rx
£7300 CPU2500RKSStTx/Rx
CPU2500R
£269.00 CPU250oRSt
Rx Dig O.2b30MHz
CPU2500RS
CPU2500RSt
CPU2500RK
Rx 0.15-30MHz
FRG7700 c/w Memory.
12 Channel Memory
.
PRICES EXCLUDE VAT 15%
2m 25W
2m 25W c/w
2n 10W
2m 10NV c/w
2m 25W
2m 25W c/w
2m 1CW
2m 10N c/w
... T.B.A.
T.B.A.
£280.00
step .£327.00
£260.00
step £287.00
£307.00
step £316.00
£27300
step £300.00
2YEAR DISTRIBUTOR WARRANTY
LIMITED
SOUTH MIDLANDS COMMUNICATIONS
SO44DN, ENGLAND
OSBORNE ROAD, TOTTON, SOUTHAMPTON,
Telephone: Totton (0703) 867333
A
Access
Buy itwith Access
Telex: 477351 SMCOMM G
Telegram: "Aerial" Southampton
SMC (Jack Tweedy) LTD.
SMC (Jack Tweedy) LTD.
NORTHERN (Leeds) BRANCH
Roger Baines, G3YBO
79 Chatsworth Road,
Jack Tweedy, G3ZY
150 Horncastle Road,
Woodhall Spa, Lincs.
Colin Thomas, G3PSM
257 Otley Road,
Leeds 16, Yorkshire.
Tel.: Leeds (0532) 782326
9-5.30 Monday -Saturday.
Chesterfield, Derby.
Tel.: Chesterfield (0246) 34982
9-5 Tuesday -Saturday.
GW3TMP Pontybodkin 1035287) 846/324
GMBGEC Edinburgh 1031665) 2420
Tel.: Woodhall Spa (0526) 52793
9-5 Tuesday -Saturday 1+ appoint.).
AGENTS STOCK AND SALES
G3ZUL Stourbridge 1D
31 5917
BARCLAYCARD
VISA
107621 840656
GI3KDR Bangor (0247) 55162
GI3WWY Tandragee
550
THE SHORT WAVE MAGAZINE
i
%=
( /ii
\\\`
CDE
\
_
Accurate, silent selfcalibrating control box.
Dial up desired beam
heading, push knob;
motor rotates to that
position and then
switches off.
South Midlands
SMC FOR THE WIDEST CHOICE IN ROTATORS
CDE
STOLLE
STOLLE
Upper support bearing
for AR30, AR20, etc.
Upper support bearing
for all "offset" Stolle.
Automatic control box.
Takes 1%" stub and
1%" mast.
Takes 1%" stub and
2" mast.
and the rotator turns to
the position and stops.
Turning shaft (up to
1%") passes through
use.
per metre 26
,
£41.00
Post and Packing 85p
CD562
£6.75
-
poet and packing £1:00
RZ100
£10.00
CHANNEL MASTER
Upper mast support
bearing.
Takes 2" mast and
134" stub.
Automatic control box.
Dial direction secondary
Rotary bearing 3 -way
guying.
Takes 129/32" mast.
pointer gives position
during travel.
Takes 1-2" mast and
stub.
RC3W 3-core control cable
9502A (post and packing free)
RC5W 5-core control cable
2010 (post and packing free)
per metre ?7p
£48.00
Post and Packing £1.20
9523
£10.20
Accurate, silent selfcalibrating control box.
Automatic control box.
24V AC motor. Lightweight head.
Dial up desired beam
heading, push knob;
motor rotates to that
position and then
switches off.
To 2% sq. ft.
Takes 1N-1'4" tube.
For VHF use and light
HF use, c/w lower
casting.
per metre 26p
Post and packing 85p
9525
£11.30
£25.00
Automatic control box.
Dial direction secondary
pointer gives position
during travel. Stainless steel hardware.
Heaviest duty "offset
type". To 5sq. ft.
RC3W 3-core control cable
9508 (post and packingfree)
Large
meter gives read out of
antenna heading at all
times. Wedge solenoid
8Y, sq.
controls.
15 sq.
with lower mast fit
casting.
per metre 26p
£52.00
RC5W 5 -core control cable
BT1 (post and packing free)
£99.00
per metre 26p
£79.50
CDE
Large
illuminated
meter gives read out of
antenna heading at all
times. Wedge solenoid
brake mechanism.
Handles antennas to
per metre 39p
Handles
aerials up to 5sq. ft. of
wind area. Supplied
brake mechanism.
ft.
£57.00
CDE
illuminated
meter gives read out of
antenna heading at all
times. Armature brake
Low voltage meter.
Handles antennas to
per metre 0(
Four position preset
plus normal manual
CDE
illuminated
CD45)Securicor Delivery free)
i
RS5W 5-core control cable
AR401postand packing free)
CDE
RCBW 8-core rotor cable
£45.00
CHANNEL
MASTER
CDE
Large
per metre 26p
Takes 1-2" masts
and 1-2" stub.
STOLLE
RC5W core control cable
505 )p&p £ 1.65)
ta
For UHF and small VHF
CHANNEL
MASTER
1-11/4"
Dial desired direction
rotator.
For UHF and small VHF
use.
RC5W 5core control cable
AR30(post and packing free)
November, 1980
Handles antennas to
ft.
30sq. ft.
RC8W 8-core rotor cable
per metre 39p
HAM IV (Securicor Delivery free)
£ 145.00
RC8W 8 -way rotor cable
T2X (Securicor Delivery free)
per metre 39p
£199.00
PRICES DO NOT INCLUDE VAT (15%)
SOUTH MIDLANDS COMMUNICATIONS LIMITED
OSBORNE ROAD, TOTTON,
SOUTHAMPTON SO44DN
9-5.30 Mon -Fri 91.30 Sat.
Head Office Showrooms
Cables Aerial Southampton
Telex 477351 SMCOMM G
Tel: Totton (0703) 857333
AGENTS STOCK AND SALES,
G3ZUL
Brian
Stourbridge
G13KDR
John
Bangor
GMBGEC Jack
Edinburgh
GI3WWY Mervyn
Tandragee
GW3TMP Howarth
Pontvbodkin
GWEEBB Peter
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(fYMR43)
(0247)
(031665)
(0762)
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(0352871
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22254
551
THE SHORT WAVE MAGAZINE
Volume XXXVIII
I
Communications Ltd 4f/
YE5U
SMC FOR TWO METRE MOBILE EQUIPMENT
KDK 2025 2m SYNTHESIZED 25w TRANSCEIVER
* Custom designed microprocessor control
* 25kHz and 12. 5kHz synthesizer steps!!
* 'Instant QSY', 10 times rate button
* 25 Watts of reliable RF output
* Band scan between any 'easy set' limits
* 10 write-in non-volatile memory channels
* Memory scanning with hold facility
* Standard ± 600kHz or any repeater split
The KDK FM205E is a 12V dc two -metre Fns transceiver for mobile
or base station use. Although feature packed, operational ease is
assured by use of a "custom microprocessor."
Digital frequency synthesis provides full band coverage in
12 5kHz or 25kHz steps. "Single knob" frequency selection is by
an optically coupled encoder. A dialling speed switch (increases
tuning steps) facilitates rapid QSY's.
A 10 slot memory with Ni -Cad back-up, provides 10 duplex (plus
+ 600kHz shift) and/or 5 semi -duplex channels, making the 2025as
easy to use mobile as a crystal controlled transceiver. One memory
is semi -dedicated to"priority" and programmable when the 2025 is
dial controlled.
The 2025 embodies the best non -lockout scanner. It scans
occupied or empty channels and a flick switch enables immediate
transmission. The scanner works on the memories and across any
selected portion of the band (scan limits are defined by two of the
memories).
PRICE? £225.00 INC.
Dual gate UHF MOSFETS in the RF and mixer provide superior
intermodulation performance with high sensitivity maintained over
the band by auto-varicap tuning. A monolithic crystal filter in the
first IF and a 15 pole ceramic filter in the second provides excellent
selectivity,
The single conversion transmitter uses a balanced mixer and a
VCO on the signal frequency (directly modulated for superb FM) and
a hybrid power module for 25W (or 3W) RF. The PA is imperyious to
breakdowns under infinite VSWR.
Necessary control function instructions are programmed into the
microprocessor itself. But by re -arranging a diode matrix, the lower
frequency transceive limit, the high frequency receive limit and the
high frequency transmit limit may be altered to allow for changes of
band plan or location.
Switchable auto -tone -burst,
RF
attenuator, squelch,
microphone, microphone clip, power lead, mounting bracket,
handbook are, of course, part of the package.
VAT AND SECURICOR DELIVERY
MIRAGE 2 METRE AMPLIFIERS
Reliable 12VDC, 2 metre linear amplifiers with adjustable delay for
SSB, built in low noise moderate gain preamplifier, remote control
option, automatic RF sensing manual overide.
10W in 80W out. 11-2W in 15-30W out)
8106
5%" x 3" x8",[email protected]£105.00+ £120.75
10W in 160W out. (Drive 200mW to 15W)
B1016
5%" x 3" x 12" , 20-25A @ 13.8V £ 142.50 + f163.88
B3016
30W in 160W out. (Drive 15W to 45W)
5%" x 3" x 12", 7-22A @ 13.8V £ 165.00 + f189.75
£17.25
Remote control unit c/w 18' cable £15.00 +
RC1
e«:
Huy it with Acct's:
SMC (Jack Tweedy) LTD.
Roger Baines, G3YBO
79 Chatsworth Road,
Chesterfield, Derby.
Tel.: Chesterfield 102461 34982
9-5. Tuesday -Saturday.
NORTHERN (Leeds) BRANCH
Colin Thomas, G3PSM
257 Otley Road,
Leeds 16, Yorkshire
Tel.: Leeds 105321 782326
".9.5.30 Monday-Saturday.
r
¡
SMC (Jack Tweedy) LTD.
BARCLAYCARD
Jack Tweedy, G3ZY
150 Horncastle Road,
VISA
Woodhall Spa, Lincs.
Tel.: Woodhall Spa 105261 52793
9-5 Tuesday -Saturday I* appoint.)
552
THE SHORT WAVE MAGAZINE
November, 1980
R redhurs
electronics
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0444 400786
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Clock
Yaesu YH55 Headphones
Trio HS4 Headphones
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SWR 25(Twin Meter)
SWR T435 (70cm)
SWRSW11O)2n)
SWR CN 62012m/
SWR CN 630 (2m)
Dummy Load DL20
Dummy Load T80
Dummy Load Tt00
Dummy Load T150
Dummy Load T200
Dummy Load DL1000
Keyers HK 707 (up/down)
Keyers HK 704 (Squeeze)
Keyers EK 1501semi/fully
auto with monitor) 240'12r
Power Supplies PM 103
3-12v 'hA
Power Supplies SP 134
13.8v 4A
Power Supplies PH 5000
13.8v 5A cont (7A max)
Power Supplies EP2500
13.8v 25A cent
price carnage
£18.40 150.75)
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SHORT WAVE
MAGAZINE
ADVERTISER'S INDEX
Page
g
Aero & General Supplies ...
590
Amateur Electronics UK 535, 536, 537
Amateur Radio Exchange ...
554
Amcomm Services ...
... 591, 594
J. Birkett ...
...
...
596
Bredhurst Electronics ...
552
British National Radio and
602
Electronics School
...
Cambridge Kits
600
593
Catronics Ltd.
593
C. B. Electronics
...
599
Colomor Electronics Ltd....
601
Crayford Electronics
...
Datong Electronics Ltd. ...
589
596
Garex Electronics ...
597
Gemini Communications ...
601
G2DYM Aerials ...
G3HSC (Rhythm Morse
...
599
Courses) ...
...
597
Heathkit
...
597
D.P. Hobbs Ltd. ...
K.W. Communications Ltd.
595
...
592
Lee Electronics Ltd.
...
590
Lee Engineering Ltd
...
598
Leeds Amateur Radio
Lowe Electronics front cover, inside
front cover, 533, 534
Mérseyside Amateur Radio
...
...
592
Supplies ...
M.H. Electronics ...
601
Northern Communications
594
Partridge Electronics Ltd. back cover
586
P.M. Electronics Services ...
590
Quartslab Marketing Ltd....
... 584, 585
Radio Shack Ltd. ...
595
R.T.& I. Electronics Ltd
...
588
...
...
S.E.M
Small Advertisements 598, 599, 600, 601
South Midlands Communications
548,549,550,551
Ltd....
602
Spacemark Ltd.
...
... 582, 583
Stephen -James Ltd.
S.W.M. Publications
inside back cover, 599, 603, 604
Thanet Electronics Ltd.
544, 545, 546, 547
T.M.P. Electronics
...
Tuition
...
...
597
601
Uppington Tele/Radio
...
...
(Bristol) Ltd.
...
Reg Ward & Co. Ltd.
Waters & Stanton Electronics
602
602
538, 539, 540, 541
... t
600
...
Geoff Watts...
Western Communications
...
587
...
(Galway) Ltd.
Western Electronics (UK) Ltd. 542, 543
600
W. H. Westlake
(GB3SWM)
ISSN: 0037-4261
Vol. XXXVIII
NOVEMBER, 1980
No. 445
CONTENTS
Page
Communication and DX News, by E. P. Essery, G3KFE
Testing Transistors with a Multimeter,
by P. C. Cole, G3JFS, ex-VK6AI, 5Z4PQ
"SWL" -Listener Feature
An Introduction to QRP Operation,
by Christopher Page, G4BUE
The Yaesu-Musen FT -707 `Wayfarer' Transceiver
Equipment Review
Clubs Roundup, by "Club Secretary"
An Inexpensive, Lightweight Mast,
by D. J. Walters, G4DFV
VHF Bands, by N. A. S. Fitch, G3FPK
555
558
560
563
-
567
572
576
578
Editor: PAUL ESSERY, G3KFE/G3SWM
Advertising: Charles Forsyth
Published at 34 High Street, Welwyn, Herts. AL6 9EQ, on the last Friday of the
month, dated the month following.
Telephone: 04-38715206 & 5207
Annual Subscription:
Home: £6.50, 12 issues, post paid
Overseas: £6.50 ($13.00 U.S.), post free surface mail
Editorial Address: Short Wave Magazine,
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Prices shown in advertising in this issue do not necessarily constitute a contract
and may be subject to change.
AUTHORS' MSS
Articles submitted for Editorial consideration must be typed double-spaced with
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drawings and diagrams should also be shown separately, and tables of values
see any issue.
prepared in accordance with our normal setting convention
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copyright passes to the Short Wave Magazine, Ltd., on publication.
-
©Short Wave Magazine Ltd.
E. & O. E.
VAT Reg. No. 239 4864 25
553
November, 1980
THE SHORT WAVE MAGAZINE
554
AMATEUR RADIO EXCHANGE
'
7
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Receives in LSB, USE, AM and FM
Optional 12
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555
THE SHORT WAVE MAGAZINE
Volume XXXVIII
COMMUNICATION and DX NEWS
E. P. Essery, G3KFE
running a Hallicrafters HT -40
The Bands
PERHAPS very brief mention maybe
made here of your scribe's
current efforts to get on the bands,
homebrew-style.
The
QRP
transmitter is now going like the
dream,
aerial/
proverbial
switching
transmit/receive
likewise; and the first converter
design completed, tried, but found
no lack of sensitivity but
wanting
far too much response to unwanted
big signals, so that it runs more or
less all the time with 20 dB of
attenuation connected! This was
not entirely unexpected, in view of
the quite simple arrangement used
to bring the Top Band signals on to
7 MHz; but if it won't do, it won't do,
and redesign is required in order to
bring up the intercept point by at
least 20 dB, and preferably more. Of
course, having spent so much time
on the transmitter it occurred to the
writer that the Top Band signal
could have been derived from the
3.5 MHz output by a simple divide -
-
by -two circuit!
Next we turn to G3PKS (Wells)
who reckons activity on the band is
on the upswing, with some people
at least finding DX. Jack confined
himself to working sideband nets,
and in particular the early -evening
Somerset gathering on Mondays
which seems to be quite a thriving
affair.
G3PKS
Eighty
found the evenings
steadily getting better with good
signals and less QRM than on Forty.
On the two or three mornings when
Jack had a sniff round before
breakfast, little was heard in the
way of DX, but plenty in the way of
static; in fact it was a bit grim.
We had to go right to the last
page of the G3CED/G3VFA log to
George
find any QSOs on Eighty
had clearly been too interested in
real DX in the HF bands, but on two
days he gave it a going-over, raking
in DLOXX/DJ5PE, G4ITP, G4DPL,
ON6FZ, G3IFB, YO4WJ/MM; and
-
G4HQO/ex-G3REV
who
was
transmitter and an HRO receiver,
which brought memories flooding
he had one
back to G3CED
running continuously for seven
days and nights during the Dunkirk
evacuation in 1940. Here they are
still doing their stuff forty years (or
more, as they first appeared around
1936) further down the log. Indeed
so, and your scribe wouldn't raise
-
any objections to a good specimen
in the shack right now!
G2NJ (Peterborough) mentions
YO4AVR/MM, and G4FWC/P who
said "we are members of Tamworth
club here for the weekend" which
made an odd coincidence as he
worked G4HOM in Tamworth
running one watt on the previous
evening. Perhaps the best of the
QRP bunch was PAOGG, at
Heenstebe, with a half-watt putting
in a very good signal (admittedly
when conditions were good).
G3ZPF (Dudley) says he is
"poised for the winter season" but
so far the posture seems to have
had unsatisfactory results
-
nothing of DX heard or worked save
for one poor inoffensive UA9. As for
"you must be kiddin' " (a
SSB DX
phrase which defines David's age
pretty accurately!).
-
Forty
For G3PKS the local and EU
signals, at up to 20 over S9 during
the day, created what he describes
as bedlam; but on the other hand
found a fair amount of DX on the
band in the pre -breakfast period,
with K4KP and K5MA worked just to
keep the hand in, although EA and
VE were all around.
Albert, G4CQK (Walton -on -
Thames) has lashed out on a TenTec Argonaut 515 which can put five
watts p.e.p. input's worth of RF into
his end -fed inverted -V, 120 feet long
by 26 feet high, fed at the home end
through an L -match ATU. The
combination was used on 7-28 MHz
as will be shown; on 7 MHz, a
pleasant QSO was with EIOCF, a
fellow G-QRP Club member, and
QRP both ways.
G3CED/G3VFA's log shows
various changes from 50 watts to 2
watts and back again; on 7 MHz
YU3DEC, DJ3VK, G2IK, G3ORH,
DL8LK, G3HHT, G3WSJ, PAOUB,
G3IGU, all on 50 watts and the
Joystick set-up, were mingled with
the favourite two -watt level signals
sent to GJ5DQE (QRQ log -filling
contest in GJ5, says the log note!),
G3BPX, LAOCX, OR5AG/QRP,
F6ZSF, G4JFI, and GW5TW.
Nice
to
hear
again
from
G3ZGC/MM on the MV Sevonia; the
/MM permission this time took just
five days, which is considerably
better than the three weeks which is
the time the Home Office people
say the processing will take. Like
almost everyone else, Richard took
most of his operating on the HF
bands, but on Forty there was an
interesting one with ZL2BEM
worked while G3ZGC/MM was in the
Eastern Atlantic.
G4ITL (Harlow) came to the
- with common feederline
we suspect he was
conclusion
that his three
"assisted" to it!
dipoles
were a bit of an eyesore and
possible wind -traps for the autumn
-
down it all came in
favour of a half -sized G5RV, which
gave an extra band to play wireless
on. Forty was given a whirl, mainly
at lunch time; so far it is difficult to
come to any firm conclusions about
it, but if a SSB contact can be
found and worked on 7 MHz at
lunchtime with about three minutes
for the complete cycle, then it is
quite clearly getting out OK!
gales. So
Here and There
Turning now to the general
goings-on, we were rather surprised
to hear from G2LV up in Aberdeen
instead of in Devon, and in
Aberdeen Royal bandage -works at
that. Hopes are high that Aberdeen
will be able to solve a problem that
Exeter and Guy's had both declined
-
so much for these Southrons! Anyway,
Dick was quite happy about the
chance encounter that took him
away from salmon -fishing in just 24
hours flat! No doubt about it, these
556
fibre -optics are quite handy tools
for seeing into odd corners
hope
to hear you soon Dick, at first we
guess on CW, but then hopefully
back on Phone. Dick has a receiver
with him, and he is quite surprised
at the heavier traffic he is hearing as
-
compared
with
home
-
commercial CW and duplex Phone,
off-shore stuff and fishing, much of
the noise Norwegian, and quite a
dog's dinner at times.
G4BUE (Upper Beeding) writes
with some details of DX worked,
and adds some details nice and
early of the G-QRP Club Winter
Sports from December 26-31
inclusive, to promote QRP-to-QRP
activity. On each day the times and
frequencies are: 0900 on 14060 KHz,
1000-1100 on 21060 and/or 28060
KHz, 1100-1200 on 7030 KHz,
1200-1300 on 3560 KHz. 1300-1400
sees you back on Forty, 1400-1500
Eighty, 1500-1730 21/28 MHz,
1730-2000 on Twenty, 2000-2100
Forty, 2100-2200 Eighty; rounding
off, between 2200 and chucking-out
time, on Twenty. As for the weekly
Sunday activity periods 1100-1230,
and 1400-1530, on all the usual QRP
frequencies as noted above, and
with all times given in GMT. Next
month we will give the 1981 Special
Activity Week -Ends, due February
28 -March 1, and September 12/13.
We must turn now to the CQ WW
CW and Phone results, for '79.
Looking first at the CW leg, and to
the QRPp World Top Ten, where we
see G4BUE's call right at the top
number 1 QRP score, no less. We
need to remember it, because as we
go through the all -band, and the
multi -multi listings, and down the
one-band lists we don't see another
G until we get down to 7 MHz, where
GW3NYY made fifth, and Top Band
where G3SZA was top of the pack
with all but double the score of the
second placeman, K1PBW. We
noted, too, WIBB/1 placed third in
the W listing, where of course the
lead score Stateside was K1PBW.
To all these
our congratulations.
On the Phone contest, we have
G3FTQ placed seventh in the world
QRPp listings, G3FXB second in the
world single -op. all-band category.
Among the single band wallahs, 28
MHz saw G3MXJ at fourth place in a
very close top five
a couple more
QSOs and a multiplier could have
up -ended that list well and truly
-
-
-
-
THE SHORT WAVE MAGAZINE
November, 1980
with no other representation until
we get to Top Band, where GM3ZSP
was third and G3SZA placed fifth.
Incidentally under the rules about
holding trophies more than once in
three years G3FXB takes the World All Band Trophy.
Still with results, we have the 1979,
TOPS CW contest results. Out of some
180 entries there were twelve G stations,
of whom top of the bunch was GB2TAC
at HMS Belfast in what would have been
sixth place; however since he was scored
the bands to leave room for the rest of
us, and we can reciprocate by keeping as
far as possible out of their hair!
Looking at WI WY's Calendar just to
check we've forgotten nothing of
importance, the eye lights immediately
on November 29-30 for the CQ WW DX
CW contest, and over the weekend
December 6-8 the ARRL 160 CW
contest. Fans of these two will know the
game anyway, so we need say no more.
From contests we gravitate naturally
to DX-peditions, since so many are set
up to improve the chance of a winning
contest score.
A DX-pedition with a difference it
might be called; five amateurs were
among the group invited to Peking
between September 28 and October 8,
including our old friend W6AM. The
itinerary is Peking -Nanking-Shanghai.
Sad to say W2IYX, who was one of the
group invited, entered Huntingdon
Hospital for heart surgery on September
6
can but wish him well and
commiserate with him on missing what
should be an interesting visit indeed.
Still with BY we hear that VK2NDK,
who was operating /LH at the time of
writing and hopes to be at T3A during
December, has been enquiring about the
possibilities of BY operation, and has
received what he calls "encouraging"
replies.
If you're looking for a QSO with the
N. Cooks Is. it should be noted that by
the time this comes to print a ZL station
will be there; but he is a raw novice to our
bands, and so he will be slow at first.
Don't sweat too much though, as he is
stated to be there for some 6-7 months.
His actual spot will, it is understood, be
Penrhyn Atoll.
During the period at which this issue
reaches you, there is a possibility of
Sable Island operation, albeit there will
not be any special prefix so keep ears
flapping!
Finally, the matter of P29JS and
Norfolk Island. It sounds as though
things are falling into place, and P29JS
has been doing his homework on the
problems; the target is for a crew to be
there in January 1981 and at this
moment it all looks good.
Time and space run out apace on us,
so we must return to the reports.
but not entered, we must note
GW3KOR 7th, and G3ABG at 16th. At
the top was HASNP, SM3VE came
second, and DM2BTD third, G
representation was completely absent in
the multi -operator section.
For 1980, the TOPS CW contest
weekend will be 1800z December 6 to
1800z on December 7. Call CQ QMF,
and it all happens on 3.5-3.6 MHz, with
the low end of the band the place to look
for the DX. Contacts with own country
one point each, other countries in same
continent two points, contacts with
other continents five points. A QSO
with the HQ stations GW8WJ or
GW6AQ rates 25 points, as does a QSO
with GB3TAC if the latter can be on
again this year. Total score is QSO points
total times the sum of the prefixes
worked, and logs to go to Peter Lumb,
G3IRM, 14 Linton Gardens, Bury St.
Edmunds, Suffolk IP33 2DZ not later
than January 31, 1981. We assume that
means to arrive. G3IRM is of course a
QSL Bureau man, and we thank him for
his kindness in popping a few QSLs in
his letter.
On the contest front we have a couple
of good ones on the weekend of
November 15-16-17. MCC is of course
the one we are most interested in
details were on p. 494 of the October
issue
but we have an overlap of two
hours with the OE Top Band CW
contest, which is foci a bit of extra
flavour! For the record, the OE contest
scoring is one point for each QSO, plus
one point for each different country or
numeral prefix (two for OE prefixes),
with final score QSO points times
multiplier. Note the OEs are authorised
for 1823-1838,1854-1873 and 1879-1900
KHz, and their contest runs from 1900z
November 15, till 0600z the next
morning.
ARRL's Sweepstakes CW is
November 1-3, and Phone over MCC
weekend. Remember this is an American
contest, and that they have been
recommended to stick to certain parts of
-
-
-we
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Twenty
Undoubtedly where most of the
world's transcontinental amateur radio
traffic takes place, regardless of the
sunspot cycle; at the time of writing one
could rise at almost any time and hear
Volume XXXVIII
THE SHORT WAVE MAGAZINE
life on the band (and noise, too!).
G4BUE stuck to his QRP, where
incidentally he is at 2O7C worked, and
seven short of the 200 confirmed, those
last seven QSLs don't seem to want to
turn up! On Twenty he made just one
QSO, a CW one with PY7PO/0.
G3PKS says he rarely visited the
band, but found it in excellent shape for
all that; he worked 4Z4TL, K4IXD and
a brace of Europeans for aerial testing
purposes.
At G3NOF (Yeovil) the West Coast
Ws have been very strong at around
06002; as they have faded down so the
long -path VK/ZL have surfaced, and
around 0700 the Pacific stations have
shown. The good conditions on the
higher bands have kept Don from the
band, but he did work FK8DD,
FROFXP, FROEUT/G, H44SH,
HH2W, J3AH, HKOBKX, HKOFBF,
IMOMIE, KL7Y, P29JS, P29PNG,
T2XYL, T3AC, UA1PAL (Franz Josef
Land), VK2AGT/LH, VK7KH/M,
VK9NL, VKOKH, YJ8PD, ZK1AK,
ZLs, 5W1AU, 8RIRBF and 9N1AG.
`CDXN' deadlines for the next three
months
-
---
plus some radials worked quite
effectively. Even though Guinea-Bissau
is one of the few DXCC countries
Norman needs, he didn't need it badly
enough to apply for entry to the list for
J5KJ! Morukulien was worked using the
SJ9WL call, CZ6ACB in VE6-land,
PY7PO/0 from whom a QSL is hoped
for (the previous Fernando do Noronha
QSOs haven't resulted in a card),
4U1UN which Norman thinks is country
number 305, FO8GM, and a band new
one in VP2VGS; the XJ5YA heard on
CW turned out to be a VE5.
G3ZGC/MM found conditions on
Twenty a bit odd from the Med., with
weak signals to UK unless there was
some evening or night time around;
however once out West, the skeds with
G4GVF at 1715z seemed to pick up.
Surprisingly a very weak signal from
G3ZKL/M in Manchester was plenty
good enough for a thirty minute natter
with no QRM. An interesting one was
with G3ZHI who has swallowed the
anchor but was once /MM on the
Sevonia team
the present indeed
linking up with the past! All these were
-
SSB, but CW yielded ZL2VS,
ZL1BMH, ZL1AXM, ZL1BRB,
ZL1OG, and VK3AVA.
Now 21 MHz
December issue
November 6th
January issue December 4th
February issue
January'8th
QRP on this band with SSB yielded
G4BUE contacts with YJ8NPS,
Please be sure to note these dates.
VS5DD, YC1GJ, KP4KK/DU2,
YB2SV/9 and 9GIJX; CW accounted
G4CQK and his Argonaut 515
worked Phone with CNSCK, IMOMIE,
OZ7AMQ, with CW accounting for a
two-way QRP Club QSO with
SP5AGU.
Turning
to
the
log
of
G3CED/G3VFA we see, at 50 watts into
the development Joystick system,
UB5MJL, DJ4LO/P who has a mobile
aerial on the balcony driven by an
FT -101, UA6PAP, a long ragchew with
YU2REO, SMOLFK/0 (a YL); and on
his favourite two watts George keyed to
SM6HLN for a long ragchew after a CQ
call, UA1CRD, YO2IR, OK2PGA,
I4ZXH, OH5KP, HA7LM twice. Here
is yet another log indicating how the DX
is more to be found above 14 MHz these
days.
Next we have G3FPK (Purley) who
reckons that it has been a good month
for VHF or HF addicts
doubtless all
the VHF end is covered in his column
elsewhere in this issue. Twenty with the
FT -707 and half a TA33 driven -element
-
for 9M2KG, 4X6AG, FHODX. Chris
has 160 countries worked on QRP now
on this band.
G3PKS remarks that generally
speaking he heard DX a -plenty, with
one twenty -minute session producing
PY, Ws, VE, JAs, and VU, not to
mention Europeans and a UL7. So
one day Jack called CQ on a dead band,
to see if anything stirred, for nearly a
quarter-hour. The result of his efforts
was fine sharsh, plus a few weak signals
which were believed to include JA; later
on VE4SK was 599 both ways and
W8NOT also was hooked.
G3NOF says in general conditions on
21 MHz were rather the same as 28, with
the 0700 opening to VK/ZL/KL7 long
path, turning to short path around 0900.
JAs were about from 0700 till 1700, and
around 1700 the short path has been
good to HS, 9M, etc. Americans from
1000 right through till the early hours.
QSOs on SSB were made with A4XGR,
A4XHZ, DU1JB, FK8DD, FK8DH,
-
FO8FO,
FO8GX, FLOFLO/T,
FR7BP/T, EW8SC, G4COA/W0 (N.
557
Dakota), HS1AMI, HS1AMM,
HS4AMI, J3AH, JAs, KC6IN,
KH6CF, KL7D, KL7Y, KX6BU,
OHOAM, P29NRL, S83T, TA1KD,
UM8MAQ, VE7BRI, VK8DH,
VK8NE, VK9NL, VK9NW, VK9ZG,
VKOSJ, VP5KAQ, VP5TCI, VP8PP,
VS5RP, VS6CT, W6LKT/7 (Nevada),
(Arizona),
W7AO
W7RDO
(Wyoming),
WA4EHS/KH2,
WA1YIG/3B8,
WL7ACN,
XJ5AE/VE8, XP1AB, ZK2TW, ZLs,
ZS3LK, 4S7EA, 6Y5DA, 9M2CR,
9M2GZ
fair old collection!
G4CQK tangled with FOAHY/FC,
HV1CN, VEIAJJ, 9G1JX, plus four
Wls and three W2s; all SSB and all with
his QRP.
G3CED mentions CW with OX3AX,
-a
UA3VAD, JR3RNI, WB9JBF,
W9NFW, 12PYA, JA7HRF,
UA4WPX, AF9X/MMI who had a
regular wolf-pack on him, KIHBX
when that station was the only W
audible on the band, JAOAXV,
UA3WW, LASXX, and YO2BON.
G2NJ reports on another of those /M
expeditions with G5NX, where the latter
operates 144 MHz Phone and Nick sits
in the back with 21 MHz CW. This time
the first three, HA6KVD, YU3CNO and
YU1DGH all dished out 599 reports.
Lunch was at Uppingham, with the
G2NJ and G5NX QSLs left in the back
window; when they got to the car after
lunch they found a note under the wiper
arm from G3UOF (ex-ELON/MM)who
had noticed the cards while happening to
be passing.
At G3FPK not a lot of time was spent
on 21 MHz, but he did find LZ13C, to
celebrate 1300 years of the country's
existence.
The most unusual QSO for
G3ZGC/MM was with the one who
turned out to be ground -wave at all of
twelve miles away! VS5DD was worked
with a crystal about six times too big for
the holder, but it was good enough
despite that, since the rig is pre -tuned
and only about 5 watts of RF are
available.
Ten
Space crowds in on us, and time is
inexorably running out too, so we must
make haste. G3PKS found this an
enjoyable band save for his failure to
raise KG6RT. However he did collect
PY2GUL, W3GM, JISTEQ, K4UWH,.
W4QLL,
WB1HIH,
K2QFL,
WA9RDF, VE3BDO, (who gave Jack a
RST599 report to his surprise),
WB6GGL,
W6THN, VE3KPH,
558
THE SHORT WAVE MAGAZINE
W5UW, KV4AD, WA3CAU, K3IWZ
and WOIR; while, as he was writing at
0700, JAs filtering through.
G4HZW (Knutsford) sticks to his
last, Ten with a FT -75 and a two -element
Quad at 24 feet, a combination which
seems to work very well; a pity Tony
can't be on in the mornings which
reduces the VK/ZL count, but from his
list the underlined ones are noted here:
JI1DLZ, C6ADV, FM7AV, LU9DGW,
VKs, W7JVG, W7PEY, WOZV,
YJ8NPS, ZL4BO, 3BOLH, 8Q7BB,
9GIJX, 9K2EW and 9M2GZ.
Now we turn to G4CQK and his
Argonaut, which on 28 MHz connected
with CT2CQ, EA8LS, FPOFXP,
HM1QO, JAIJBY, JF1VUR, OX3CO,
PSBSN, PT7WA, SVOAW, U6JOK,
CX4BW,
The thought of Ten doesn't seem to
have crossed the G3CED mind until the
end of the period, when he put his two
watts over to KAOBHK, W2AFM and
UB5IMJ.
Ten, says G3FPK quite firmly, has
been open daily to North America; and
H44, VK and so forth, workable on the
indoor satellite crossed dipoles. Norman
fell over the SVOAW on Crete who was
asking for 4 IRCs or a `green stamp' for
a direct QSL card
G3FPK is
proposing to obtain a Green Shield
Stamp for the purpose! 9V1UH was a
scratchy affair, mixed SSB and CW;
FHODZ/MM on CW, FHORX on SSB,
3Z5OPZK was a Polish CW
commemorative effort, DF3NZ/ST2
for a band new one on SSB, and another
band new one on Ten was FRODZ/J.
FPOFJW,
9J2FC,
DF3NZ/ST2, W6EUF, CE9AF (King
George Island), W7LR (Montana),
WB7RFA (Oregon), JH7AQH,
N6BBH, XEILCM, TJ1CK, KH6IBA,
KAOAKU/M in Minnesota with two
watts, G4COA/P/WO (N. Dakota);
plus a few mornings yielding U18AEE,
RAOSFI, VS6CT, OX3AI, OX3CO,
JH6WNO, JIIILS, WA6PJJ and
W9VJX who was running two watts to a
three -element beam, not forgetting the
small fry like "ordinary" Ws, VEs and
so forth.
G3NOF likes his mornings best we
suspect; he reports SSB contacts with
FPOFJP, FPOFXP, FROEUT/G,
FROFLO, FRORX/J, K5LBU/STO,
K7ICN (Arizona), KL7JHD, KL7Y,
JAs, H44PD, HL9TW, P29DP, P29GC,
UK7PAL, UH8HAI, VE2FOU,
WB4KQP, W4LVM, KODOJ and
WBOUXB.
-
November, 1980
An unusual QSO was the CW one with
AIOM/M in Nebraska, drivinga 65 -foot
forty -ton lorry and two trailers, the key
strapped to his knee, and a TS 120S to a
Hustler antenna on the Wing mirror.
Finally just before posting, VU2AWL
rounded the month out.
Finally we have G3ZGC/MM, who
noted a slight opening to UK just as they
entered the Med. and also as they came
out again, Ws then until the Azores,
when they became sporadic; CE5CFR,
YBOADT, OE8MI/M, SNOATW and
5N3ALE, VP8SB, and on September 3
JT1AN was 58 at 0622z, and a very
startled VK2VUQ/M was a follow-up a
moment later. From September 8 the
band really opened up and every time
Richard put out a call he raised a wolfpack.
Finale
We must leave G3ZGC/MM at this
point, as space closes in; the deadlines
are in the `box', and we hope to see you
all at Leicester. Meantime, let's have all
your news, addressed as usual to
"CDXN", SHORT WAVE MAGAZINE, 34
HIGH STREET, WELWYN, HERTS.
AL6 9EQ.
TESTING TRANSISTORS WITH A
MIULTIMETER
A SIMPLE METHOD FOR THE RADIO AMATEUR
P. C. COLE, G3JFS, ex-VK6AI, 5Z4PQ
Fig, 'la NPN Transistor
TRANSISTORS operated within their published ratings
are generally so reliable that the cost of a proper tester is not
really justified for the average amateur workshop unless large
numbers of surplus transistors are used for experimenting.
However, failures do occur and where no tester is available
reliance is usually placed on forward and reverse resistance
measurements of the transistor junctions to identify a faulty
device, as shown in Fig. I. These tests are very useful but it is
possible also to make a much more informative test of a
transistor while still using only the resistance ranges of a simple
multimeter.
The Multimeter
On the resistance ranges most multimeters use a circuit
similar to that of Fig. 2, in which the internal battery causes the
BO
E
Fig. lb PNP
Tránsistor
For test purposes a transistor can be considered as two diodes or PN
junctions placed back to back. As an aid to fault-finding a
multimeter is often used to make forward and reverse resistance
measurements of these junctions.
Volume XXXVIII
THE SHORT WAVE MAGAZINE
559
Transistor
Type
Leakage
Test
"Resistance"
"Resistance"
2S018
>2M
>2M
>2M
>2M
50K
30K
RV
Positive
-ve
the O
tNegative
polarity
polarity
on 'Ohms'
Anode
on 'Ohms'
>I Cathode
2N697
2N706A
2N3055
2N4427
BC107
0070
10K
20K
20K
4K
7K
400K
>2M
50K
Fig. 2
The basic ohm -meter circuit as used in most multimeters. RV is used
to set the meter pointer to full scale with the terminals shorted
together; the mid -scale calibration point will then equal RV ohms.
A diode connected as shown will be forward biased by the battery
and will therefore indicate a low resistance.
Table 1. Leakage and test measurements for a variety of different
transistors made with an Avo Multiminor on x100 ohms range.
Although the actual resistance reading will vary for different types of
multimeter, a good transistor will produce a "test" reading that is
significantly lower than the leakage resistance.
polarity of the meter leads to be opposite to that of the terminal
markings. There are very few exceptions to this "polarity
reversal" on the resistance ranges of commonly used meters
but as the lead polarity is important for the test to be described,
this should be determined if it is not known. The simplest way
is to connect the meter to a diode to read the forward
resistance; then the lead going to the cathode of the diode will
be the one having a negative potential.
resistance allowing current flow from the collector supply into
the base circuit. If the transistor is a good one the collector
current will then increase and this will be registered as a large
decrease in the resistance reading. Of course, the actual
decrease will depend on finger-tip resistance and tightness of
grip, as well as transistor gain, but for a simple "go/no-go"
test this is relatively unimportant as, with practice, it will be
found easy to test and evaluate a transistor in seconds.
xl ohms range.
'Meter
I
+ve
x100 ohms
range.
RV
Leakage
Resistance
0-
Test Resistance
'R' is simulated by
moistened finger-tips
Fig.
50K
1K
7K
Table 2. Comparison of "resistance" readings for an 0070
transistor as measured on the xl ohms and the x100 ohms ranges of
an Avo Multiminor.
Meter
Transistor under test -ve
20K
Multimeter
Test Results
3
The equivalent circuit of the test set-up for an NPN transistor. To
test a PNP one the meter leads are reversed.
Test Procedure
The description below is for the testing of an NPN transistor
as shown in Fig. 3. To test a PNP one follows the same
procedure but with the meter leads reversed,
Consider then an NPN transistor. With the multimeter
switched to a high (x100) ohms range connect the positive lead
(this should be the one with negative polarity) to the emitter
and the negative lead to the collector of the transistor, taking
care that the base is open circuit. The meter reading is an
indication of leakage current and will range from several
megohms, i.e. very low leakage, for a silicon device down to
tens of kilohms for some of the older germanium ones. A very
low reading indicates a fault.
Now arrange the base and collector leads so that they are
close together but not touching, and grip them firmly between
a slightly moistened thumb and forefinger. The fingers act as a
The tables give "leakage" and "test" measurements for
several transistors as made with an Avo Multiminor. The actual
resistance reading is really quite meaningless as we are dealing
with non-linear elements and the "ohms" reading for a given
transistor will vary from meter to meter as well as for different
settings of the range switch. In reality we are making a rather
crude measurement of gain at a low operating current but in
spite of the shortcomings the method works extremely well.
There may sometimes be difficulty in assessing a transistor
which has high leakage current but this can usually be
overcome by switching to a lower resistance range on the
meter.
In Conclusion
From a servicing viewpoint this method is as reliable as any
tester and has been invaluable to the author whilst working as
an engineer in remote parts of the world where even a battered
Avo could be considered as a luxury. On the rare occasion that
a proper tester has been used it has been to select or match a
transistor rather than to test it.
...
...
560
THE SHORT WAVE MAGAZINE
S W1
November, 1980
SHORT
WAVE LISTENER
FEATURE
By Justin Cooper
THE discussions last time round about home-brew seem
to have stirred up opinion in both directions. Perhaps we
should clear up our meaning and design philosophy. First off,
let it be quite clear that as far as a commercial receiver goes, one
gets just what one pays for, bearing in mind that the design
team wants lots of sales in their particular segment of the
market; this means that the commercial receiver is almost
always a compromise to please some people most of the time.
On the other hand the home-brew merchant can sit down and
write a specification for his "dream" receiver which may be
unacceptable to every other receiver user in the world what
does he care if the receiver is for him alone? Also modern
receivers tend to look complicated as compared with those of
yesteryear, largely because today's transistor- at 15p is
compared with a valve which in 1939 cost, say fifteen shillings.
Clearly then in those older days, elegant, simple design was all,
whereas today the cost of the components is small enough for
the designer to use more of them and still be able to produce a
receiver within the price bracket. A third consideration is that
in general one normally buys components of better standard
than were available years ago, the old ones having disappeared
from the market for just this reason. Finally, most ICs look
awfully complex circuit-wise, but the cost of their mass production is not so much different from that of a single
transistor the mask and the package are the meat of the cost.
Now, of course we have the other major factor to take into
account, and that is the disappearance of AM from our bands.
Back in 1927, G. G. Blake was commenting that the homodyne
(= direct conversion) approach was not feasible (a) because
the oscillator couldn't be made stable enough and (b) because it
wouldn't cope with AM. Both objections are now gone. A
single -band homodyne can be made quite effective, and
converters will put it on other bands
converters like we
always used at VHF until the advent of FM. These are simple
items to make, and will compete well with a reasonably -priced
receiver quite handsomely if properly built and driven. Indeed
the dynamic range of the direct -conversion job may be better
than the commercial superhet.
On the other hand, neither type of receiver can pick up
signals below the inherent sensitivity level of around 0.1
microvolt, so one has to accept that a poor aerial or a poor site
poses a major limitation. Equally, even with relatively poor
aerials, one may find the dynamic range of the receiver is
exceeded by a strong out of band or unwanted signal, in which
case the only solution is to attenuate the aerial input until the
noise -level drops suddenly and signals pop up out of the mush.
Of course this solution implies that one has lost the weak ones
anyway, but better half a loaf than none. The weakness of the
cheaper superhet receiver, however, lies mainly in its lack of
selectivity in the IF strip; the drift characteristic is annoying but
no more. Thus, while there may be DX about as indicated by
the stuff you can hear being worked, it is inaudible under the
unwanted junk coming down an IF lacking a suitable filter.
The answer is to build in a suitable filter, or extract the IF signal
and feed it into an outboard selective arrangement, and them
either give the outboard unit a detector and audio amp., of
take the cleaned -up signal back into the receiver at the same
-
-
-
level as it was taken out (to avoid instability) and let the rest of
the receiver operate as normal. This last approach is tricky but
can be done, and of course a valve receiver will permit the
extraction and re-insertion to be done by the simple removal of
a valve and its replacement with a plug fitting the valve base.
Anyone can build an ATU, and anyone can build a tolerable
attenuator; getting these to work reasonably well gives heart to
tackle something a bit more complex. Eventually one comes to
be able to build anything one wishes
save for the cosmetics
of case and finish, where the problem is not electronic but
purely craftsmanship.
To change tack a little, we have a letter which says our HPX
ladder is too hard for a newcomer; all we can say to that is that
careful listening with a simple receiver and aerial, used
intelligently, should see the 200 prefixes up within 48 hours
total listening time
and over the years hundreds of SWLs
have proved it for themselves!
-
-
The New Ones
A welcome to several this month. First J. Inglis (Aloa) who
is hardly a newcomer insofar as we had some correspondence
about 14 years ago, which lapsed for one reason or another.
Jock is now retired and has an HA -350 receiver, which inhales
the stuff by way of a 132 -foot wire, dipoles on 14/21/28 MHz,
and a VHF converter which can either be fed from a Slim Jim
or a five-element array. As a long-time SWL, Jock has had a
lot of fun and made many friends in 34 years at the game.
Two out three receivers are noisy on Top Band and Eighty,
muses W. R. Smith (Barnstaple), so what's wrong with design?
He adds that the best he recalls was a marine -band Sailor 46TD
and next to that his own home-brew receiver; aerial is a vertical
with a loading coil
or rather was, until the upper bit broke
when the remains were fashioned into an inverted -V. In
essence, we reckon the problem is due to a good site (both the
present Editor and his illustrious predecessor have/had very
strong links with Barnstaple, Bideford and Appledore!)
coupled with inadequate dymanic range in the receiver. The
answer, as we have so often said, is to reduce the input by an
attenuator. It could also be that "noise" means static or
manmade electrical interference is high, although we doubt if
that is the problem. The small coasters at Bideford Quay only
use a short aerial usually, and load it as best they can, but of
course sitting on seawater is "a good site" with a vengeance,
so long as the site stays afloat!
A. Stevens (Crowthorne) just missed the bus last time, with a
query which we in effect answered
albeit for R. Baker of
North Walsham last time. Odd that this question has never
been raised before, and then turns up twice. That bit about AM
Phone is to indicate that all Phone prefixes, whether they be
AM, FM or SSB, are lumped together into a single list. If you
don't find or claim any AM or FM prefixes, fine.
An initial list for the Annual comes from J. A. Darby
(London) SE16) with no comments, so we don't know what
gear or aerials are in use.
P. J. Boyce (Coventry) runs a Trio JR -310 to dipoles in the
loft and has done much of his listening in the time between
-
-
-
Volume XXXVIII
THE SHORT WAVE MAGAZINE
HPX LADDER
(All -Time Post War)
PREFIXES
PHONE ONLY
K. Kyezor (Brandon)
2430
B. Hughes (Worcester)
2229
S. Foster (Lincoln)
1977
E. W. Robinson (Bury St. Edmunds)
SWL
1762
M. C. P. Bennett (Datchet)
1571
M. J. Quintin(Wotton-u-Edge)
1517
H. A. Londesborough (Swanland) 1450
H. M. Graham (Moulton)
1285
M. Ribton (Oxted)
1091
M. Law (Chesterfield)
1197
M. Rodgers (Harwood)
1182
M. Shaw (Huddersfield)
1038
P. Ford (Longlevens)
1006
R. Middleton (Bury St. Edmunds)
924
Mrs. R. Smith (Nuneaton)
938
D. C. Casson (Reading)
J. F. Hobson (Ely)
J. Doughty (Bloxwich)
L. Stockwell (Grays)
851
A. Twelves (Rhos -on -Sea)
B. A. Payne (Leeds 18)
D. J. S. Williams (Wednesbury)
F. C. D. Barnes (Cardiff)
756
700
692
669
627
D. J. F. Gordon (Chepstow)
B. Shepherd (Staines)
T. Anderson (Stroud)
B. L.
Henderson (Salisbury)
842
826
821
571
549
546
CW ONLY
H. A. Londesborough (Swanland)1247
D. W. Waddell (Herne Bay)
T. Grimbleby (Hull)
J. Goodrick (Bognor Regis)
A. Rowland (Mansfield)
1062
722
683
477
Minimum score for an entry:
200 for CW, 500 for Phone. Listings include only
recent claims and are in accordance with HPX Rules (see p.299 , July issue). A'Nil'
is allowable in order to hold a place.
return
0 -level exams
and the start of the A -level work.
G. Bentley (Sheen) questions whether many SWLs got into
the Ladder with first -try home-brew receivers. That, of course,
depends on what you call a receiver! We recall J. Fitzgerald
from Great Missenden for many moons using a transistor
portable as the main part of the receiver, with another one
alongside so tuned that its local oscillator provided the carrier
injection, the necessary amount required being adjusted by
moving one receiver relative to the other! This set-up found
him some 800 prefixes before he got around to a first
communication receiver. Gordon has an SB -313 and says after
ten years of SWL he still doesn't grasp the need for AF and RF
gain controls. Let's try and explain. The AF gain is just a
simple volume control. The RF gain, on the other hand adjusts
the sensitivity of the receiver, gradually de -sensitising it as RF
gain is reduced. For optimum reception of a given signal there
will be a suitable combination of AF and RF gain settings. If
the band is noisy, it will probably be found that winding up the
AF gain to near maximum, and cutting the volume down with
the RF gain will result in the noise dropping and signals
appearing. Of course, this won't help directly with the
bedsitter situation where much of the noise is local and manmade and the aerial is round the room; in such a case, it is quite
surprising how much an ATU built for the special needs of this
aerial will help by pulling the maximum energy into the receiver
(of both signal and static of the aerial -borne type) which can
then be dealt with at the receiver by correct operation. Gordon
reckons his receiver is an old `cheapie', but in fact it is as good
as most and better than some currently on the market at quite a
high price; we were sorry to see ours go!
W. Ashton (Bridgend) joins the pro -home-brew group;
everything in his station is home constructed, down to winding
his own coils. December sees him sitting down in front of an
RAE paper, and when the pass slip is obtained he will brew up
a transmitter with a couple of 807s, and get into the CW DX
sounds like a good idea!
the CW DX
sounds like a good idea!
"I've joined Margarets Millions" says B. Shepherd
(Staines) wryly as a good reason for more SWL activity. It is
hard that in 1980 Briant, like so many others, should be the
unfortunates to pay the penalty for the greed of so many since
-
-
561
the beginning of W.W.II; human nature was something
Keynes and his theories didn't think of! But at least he gets time
on the receiver at different hours.
Like most of us, J. Doughty (Bloxwich) didn't find much
August time for listening, but a late session at the end of July
netted a couple of new ones on 21 MHz, in 4S7 and 8Q7, while a.
few days before writing (i.e. early September) and early
morning foray on Twenty laid low VR6, KH4, 9Y4, and
VK9NL but John doubts whether he'll be able to keep it up
in the winter!
J. G. Worthing (Shrewsbury) suggests that we should give a
certificate to everyone who achieves the All -Time Table, in
view of the head start it gives them in their activity after the
RAE pass has been obtained and a licensed station is being
operated. It's a thought, for sure, but the problem is that we
would then have to set up some onerous conditions to avoid the
award being debased; frankly we'd rather see an operating
(SWL) test made to be part of the licence requirements.
B. L. Henderson has been in his Salisbury place now for the
thick end of the year and so the incidentals of moving are all
but done away with, and a temporary wire is strung out and
receiver attached. However, the new place is showing a
shortage of new prefixes. Brian wonders whether this is the
"500" barrier, or a bad location; we would add that most
probably it's neither, but a matter of lack of practice! Usually a
"poor" site, at least for HF, is more related to the nature of the
underlying strata than to height; and the presence of trees and
brick buildings may alter the polar diagram markedly but not
soak up too much signal but "metal framed, metal clad" so
much in favour with the modern architect is definitely a
barrier, albeit it does do some reflecting! Perhaps the most
important factor is to try and get some idea of the polar
diagram of the aerial, noting the big signals and plotting their
bearings on a Great Circle map. This may show you that most
of the second hop pick-up is non-existent because the major
lobes of the aerial are aimed at blank areas of sea! The answer is
a change of aerial type, and a bit of re -orienting to try and put
the major lobes on to the DX.
B. Goodrick (Bognor Regis) has three or four oddities he
wants to claim for HPX; LA9MI/P could have been on Jan
Mayen temporarily, but one would have thought he would
have been using the TX prefix; on balance we are inclined to say
he's OK until someone proves us wrong! The Ws in VS9 and
VO1 only count for these places, and so the two SMs signing
/9Q5 are one prefix if you want to count 'em as 9Q5 (and if you
look at the rules there's no other way!). The UPOL stations are
Russians who are floating research stations on icebergs and
things; they are officially given permission to work amateurs
on safety and recreational grounds so for all practical purposes
are amateur stations. For our purposes we will regard UPOL
-
-
ANNUAL HPX LADDER
Starting Date, January 1, 1980
SWL
PREFIXES
B. Musselwhite(Warminster)
335
R. Baker (North Walsham)
499
P. J. Boyce (Coventry)
208
J. Worthing(Shrewsbury)
499
J. A. Darby (London 5E16)
207
R. D. Newall (Bracknell)
493
M. Hill (Bedworth)
207
J. Weston (Borehamwood)
470
200 Prefixes must have been heard for an entry to be made, all since January 1, 1980,
and in accordance with HPX Rules (July, p. 299). Al a score of 500, transfer to the
All-Time list is automatic.
THE SHORT WAVE MAGAZINE
562
as one single prefix, and the LA9 can only count as such, since
he wasn't signing /JX.
R. Baker (North Walsham) has an SR9 FM receiver, and a
Binatone "Worldstar" portable with coverage to 174 MJ-Iz.
Using the latter as a BFO seems to have been the way to get the
SR9 to resolve SSB signals.
That article on planning permission ("The DX -ers Guide to
Planning Consent", S. W.M., July 1980) has put off P. Ford
(Longleven) from his proposed aerial farming. One feels the
article in question did not sufficiently stress the variable nature
of the situation in different places: Basildon is a "desert"
while, for example, Harlow is very reasonable: but
Chelmsford in the same county is another desert. It is certainly
very well worthwhile finding out just what the attitude of your
local council is before feeling that the battle will be too long
and hard.
D. J. S. Williams (Wednesbury) has a couple of moans, as
he calls them. Perhaps the most annoying is the case of the
early rising and the station so heard, from the Central African
Republic who was not identifying, so that although he was
audible and his callsign known, he couldn't be logged. The
other moan is more of a simple query, about the use of the
numbers 1, 2, or 3 after a /MM. In essence Region 1 covers
Europe and Africa, with the boundary around mid -Atlantic
and curved to go between Iceland and Greenland, plus that
part of the USSR outside Europe, territories to the North of
Russia, the Peoples Republic of Mongolia, and Turkey lying
outside the defined line, but minus Iran territory which may.
fall within the limits. Region 2 takes in Greenland, all America,
both North and South, the Caribbean and some Pacific
Islands. Region 3 covers the rest
that is most of Asia except
that already covered, Oceania and the rest of the Pacific. In
details the lines A, B and C define the limits. Line A takes in
Europe: coming down from the North Pole along the
longtitude 40°E to Iatitude 40°N, then by Great Circle path to
the crossing of 60°F and the Tropic of Cancer, and down 60°E
to the South Pole. Line B defines the other limit of Region 1:
again starting from the North Pole, along longitude 10°W to
72°N latitude, thence by Great Circle to latitude 10°S
longitude 20°W, and along longitude 20°W to the South Pole.
Between A and B lie the main parts of Region 1, saving those
already mentioned. Line C again starts from the North Pole by
Great Circle to the Behring Strait international boundary at
65°30'N; by Great Circle thence to latitude 50°N longitude
165°E, by Great Circle to latitude 10°N longitude 170°W,
along this latitude to longitude 120°w, thence along 120°W
down to the South Pole. Region 3 is between lines B and C.
Region 3 is between lines A and C except for those bits
mentioned.
J. F. Hobson (Ely) seems to have obtained much of his
entertainment on the bands from the Pacific Net. No doubt the
change of listening hours occasionally does make for a
welcome change in the signals heard!
-
November, 1980
E. W. Robinson (Bury St. Edmunds) seems to have had his
fair share of fun on the bands, and noted the first autumnal
opening on Ten on August 29.
S. Foster (Metheringham) offers a few new Prefixes, and
notes his Country score is 320 heard, with 316 of them
confirmed.
On we go now to F. C. D. Barnes (Cardiff) who notes K.
Kyezor has built a peak -and -notch filter and says he'd like to
see the circuit 'cos he reckons it is the accessory to complete his
home-brew receiver. What about it, both of you? The Gaffer
would appreciate an article, for sure.
One or two people wondered about the Y00000; B. F.
Hughes (Worcester) found it to be the vehicle following the
Olympic Torch, after some research.
Next Mrs. R. Smith (Nuneaton) seems to be headed directly
for a 'grand' on the Table, despite her son David, who owns
the AR88, being on leave and doubtless operating with his G
call.
D. Casson (Reading) is sitting the RAE in December to all
candidates for this our wishes for luck and says he will then
be immediately after the morse, as he doesn't really see himself
on the FM channels. We know the feeling!
H. M. Gordon (Moulton) says Ten is his favourite band and
since August it has produced him quite a lot of DX to the
Americas, and a VK4 at 1317z; however, he was on 21 MHz
more, especially when Ten was sulking a bit, again to find
plenty of DX. The remaining bands weren't ignored but
certainly they only produced additions to the list 'in passing',
at it were.
D. J. F. Gordon (Chepstow, Gwent) fills in the gaps in our
knowledge of his rig: FRG -7000D is fed from a Daiwa CL22
ATU, and a recent addition has been one of the Datong FLI
filters in the audio. For VHF a Standard C8800 can be tacked
either to a dipole or a five -element Yagi; five elements are also
in use on 430 MHz, with a Discone, either of these aerials can
be fed into the SX-200 down in the shack. Quite a lot of
machinery! Incidentally, the HF aerial is an end -fed wire.
-
-
Others
Thanks for lists and notes from A. Twelves (Rhos -on -Sea),
K. Kyezor (Brandon), M. C. P. Bennett (Datchet), R.
Middleton (Bury St. Edmunds), GM4EL V (Arrochar), M.
Law (Wotton-u-Edge), H. A. Londesborough (Swanland), T.
Davis (Bridgend), R. Pearce (Aylesbury) and J. Weston
(Borehamwood).
Deadline
The next two are November 20, and January 22, 1980. The
address is "SWL", SHORT WAVE MAGAZINE, 34 High
Street, Welwyn, Herts. AL6 9EQ. So till we meet again, au
'voir!
-
"A Word in Edgeways", the new monthly feature of readers' letters, begins
in the February issue: deadline for your letters to arrive is January 2nd. All
letters for publication should be addressed to "A Word in Edgeways" (or
A.W.E. for short), Short Wave Magazine, 34 High Street, Welwyn, Herts.
AL6 9EQ.
Volume XXXVIII
THE SHORT WAVE MAGAZINE
AN INTRODUCTION TO QRP
OPERATION
CHRISTOPHER PAGE, G4BUE
THE purpose of this article is to introduce QRP to those
radio amateurs who never consider using less than the
maximum power permitted by their licence, (150 watts DC
input in the case of the United Kingdom), and to attempt to
convince them that it is possible to maintain QSOs with
considerably less power. To those radio amateurs already
convinced of this, the article is an attempt to indicate some
different approaches and aspects of using QRP.
If we examine the Q Code meaning of QRP we find that it
states "Shall I decrease transmitter power? Decrease
transmitter power". In practice present day radio amateurs
use the expression QRP to indicate that they are a low power
operator (hence the term QRP-er) or that they are using low
power equipment; it is very rarely used as a question or a
request as indicated in the Q Code.
For the purpose of this article, QRP is defined as DC input
power not exceeding five watts. This is the definition most
widely used by radio amateurs in Europe, whilst in the USA
QRP is often referred to as any power up to 100 watts DC (!),
and the expression QRPp being used to indicate power levels of
five watts or less. Hence QRPp in the USA is the same as QRP
in Europe. Occasionally radio amateurs use power as a
standard of measurement, and there is some disagreement at
present as to which it is better to use: some argue that it is easier
to measure input power of a PA by simply using Ohms Law,
whereas output power can be said to be the true amount of RF
used to establish the QSO. It is hoped that in the near future all
radio amateurs will adopt one or the other as a standard of
measurement for QRP.
Let us examine the theoretical implications of using QRP.
Imagine two radio amateurs in QSO on a quiet part of the 80
metre band, both using 150 watts DC input, and that signals
are 599 both ways. If one of the stations reduces power to five
watts DC input, that is a decrease in power by a factor of 30, or
in other words 15dB, which is equal to two and a half 'S'
points, assuming that 6dB are equal to one 'S' point. The signal
strength of the station would then drop from 599 to 56/79,
more than sufficient to maintain the QSO, assuming a clear
frequency and no abnormal QRM. No doubt there are some
critics who would say that what happens in theory does not
always happen in practice! It is admitted of course that on
occasions reducing power from 150 to five watts means losing
the QSO altogether, but this is usually due to factors other than
the drop in signal strength; for instance, there may be a certain
amount of QRM or QSB which is not noticeable at 599, but
would be at 56/79.
Five Watts Input
Having accepted that given the correct band conditions a
reduction from 150 to five watts enables a QSO to continue, let
us examine the different methods used by QRP-ers to obtain
five watts input. Basically there are three methods, the building
of a transmitter or outboard PA to be used with an existing
transmitter, the purchase of a QRP transmitter, or the
reduction of the drive control of an existing QRO rig.
563
Probably half of United Kingdom QRP operators are using
equipment which is home-made, and varies from a completely
home-made receiver and transmitter to an outboard PA which
is driven from a commercial transmitter. (I do not intend
setting out designs for QRP PA's or transmitters as reference
to radio books or magazines will reveal many varying designs).
The majority of the remaining United Kingdom QRP
operators use a commercial QRP rig. The Heathkit HW-8
(which superseded the HW-7) is a CW-only transceiver from
3.5 MHz to 21 MHz and varies from 2 to 3.5 watts input
depending on which band is selected. The HW-8 is a large
improvement over the HW-7 which only covered 21, 14 and 7
MHz. Probably the most popular QRP transceiver, apart
from the Heathkit models, is the Ten-Tec `Argonaut' from the
USA, both the original Model 505 and the later 509. Both
models cover all bands from 3.5 MHz to 28 MHz with five
watts input on both CW and SSB; the transceiver has full
break-in on CW and the receiver section is first class. Trio is
represented by the Model 120V, which covers all bands from
3.5 MHz to 28 MHz with 20 watts input on both CW and SSB.
Yaesu have the FT -7B which, although primarily intended for
mobile use, makes an excellent QRP rig with 20 watts input on
all bands 3.5 HMz to 28 MHz on both CW and SSB. Until
recently Yaesu also produced the FT -3015, which was a basestation transceiver covering all bands from 1.8 MHz to 28
HMz, all modes, with 20 watts input. The most recent model is
the Atlas 110-S which is basically a receiver (the Atlas
RX-110-S unit) with the addition of the TX -110 QRP module
delivering five watts output on 3.5 MHz to 28 MHz on both
CW and SSB. In addition to commercial equipment there is a
good selection of government surplus equipment available
which can often be modified for QRP use on some to the
amateur bands.
The photograph of the author's shack shows the Ten-Tec
509 `Argonaut' bottom left with its PSU above the rotator
meter on the shelf above. Resting on top of the `Argonaut' is a
Datong model FL -1 audio filter, together with the `Argonaut'
CW filter both of which greatly assist in copying weak QRP
CW signals. On the shelf above the `Argonaut' on the extreme
left is located a Datong RFC speech clipper, with two cabinets
above housing a voltmeter and three milliammeters which will
be described later. To the right of the clipper is the SWR bridge
and variable PSU which is used for the PA of the `Argonaut'
only, and will also be described later. The FR -101 next to the
`Argonaut' is part of the QRO line.
A small percentage of QRP operators use a QRO
transmitter with the drive control reduced. The disadvantage
of doing this is that by drastically reducing the current to the
PA from that which it was originally intended to operate,
inefficiency of the PA results; if one is using output power as a
standard it does not really matter, but if input power is being
used it is very important. It is often very surprising to discover
the small amount of RF passing into the transmission line to
the antenna when the output power is measured accurately.
one method in which this inefficiency of the PA can be rectified
is for the voltage to the PA to be altered in ratio to the current,
thereby keeping the output impedance of the PA in the usual
50 to 75 ohms.
-
Getting Results
Assuming that one of the above methods has been adopted
to obtain an input of five watts, w at is the best way to use this
power on the HF bands? One h s to accept that you cannot
expect to go onto 21 MHz, call ` CQ DX" and have stations
564
THE SHORT WAVE MAGAZINE
from the other side of the world answer your call (although this
does happen on occasions). A completely different approach
to amateur radio has to be adopted. Unless one is attempting to
QSO with other QRP stations, it is usually best to tune through
the bands and find a station calling CQ: preferable the station
should have at least a 599 signal, remembering that if you are
599 with him with 150 watts, you will still be 56/79 with five
watts and he should hear you.
QRP stations are often heard signing with their call and then
using QRP as a suffix, i.e. G4GUE/QRP. This is quite illegal
under the conditions of our licence as QRP is not part of our
officially issued call sign. On the other hand there is nothing
wrong in signing "G4BUE QRP". The purpose of sending
`QRP' is an attempt to let the other station know that you are
using low power, as the majority of amateurs will make an
extra effort to hear you once they realise this; it also indicates
to other QRP stations who may be listening on the frequency
that you are using low power. I have often found when calling
DX stations, even in pile ups, that a simple "W1ABC DE
G4BUE G4BUE QRP" results in the DX station returning
with "QRZ QRP", the `QRP' being the only part of the call
signs of the other stations calling him that he was able to copy.
Tail -ending is another procedure that can be used to advantage
by the QRP operator, again ensuring that `QRP' is included
with your call.
Generally if an amateur wants to work DX with QRP it is
better to use the highest HF band which is open. This is
especially true when 28 MHz is open, where all QRP operators
agree that it is easier to work DX on this band with low power
and simple antennas than on any of the others. Whatever band
is used there are periods in the day when a particular path is at
its optimum, and the QRP operator has to know and take
advantage of this. For instance if there is a pile up on a DX
station it is pointless the QRP operator joining in if the DX
station is answering calls from East Europe with only the
occasional G station being worked; on the other hand if the
DX station is only working stations from the United Kingdom
and the extreme West of Europe, that is the time for the QRP
operator to join in. Monitoring the frequency for a while will
determine which way the propagation is going by listening to
the stations being worked by the DX station. You can then
decide whether it is worth waiting on the frequency or if it is too
late.
I have found that one of the best times to work DX,
especially on 21 and 28 MHz, is to catch the band just as it is
opening. As the MUF rises to, say, 21 MHz and causes the
in the first hour, which I have not been able to repeat after that
even with increased power, yet the USA station has been
received at the same or even a stronger signal. Other QRP
operators swear by using the reverse, i.e. catching the band just
before it closes, when the MUF is on its way down. Whichever
method one finds best, the point is that by knowing about
propagation there are times during the day when it is much
easier to work DX with low power.
In addition to selecting the correct band and optimum path
opening, the QRP operator must send absolutely perfect CW,
whether he be sending at eight or 30 words per minute: speed
does not matter, but accuracy does. A study of the European
stations regularly working DX on 1.8 MHz will reveal that CW
is usually sent slower than normal, but very accurately, and the
same tactics have to be employed by the QRP operator. With a
weaker signal, the QRP operator cannot afford to make a
mistake with his call sign or signal report; if he does it's certain
that the only part of the transmission received by the DX
November, 1980
station will be the part containing the mistake(s)!
When using SSB it is equally important that clear phonetics
are used and all pronounciation is equally clear. Some QRP
operators use speech processing to advantage, but, the usual
warning of having the output advanced too high is more
important when using low power.
The many HF contests held throughout the year are an
excellent method for the QRP operator to assess the
capabilities of his low power transmitter and antennas. Many
DX stations stay on one frequency for several hours working
stations, and time can be spent calling them at different power
levels, until a contact is established. One side -result from this is
that it is interesting to compare the power levels required to
work different stations from the same area which have the
same signal strength, i.e. differentiating those stations which
obtain their loud signal strength from good antennas and those
which obtain it from high power. It is unusual for the large
multi -multi operator contest stations not to hear other stations
calling them, even weak QRP stations. They are after all the
points they can get and will often make a special effort to pull a
weak QRP signal through! This is especially true on the second
day of the contest, when they are often running out of stations
calling them.
The newcomer to QRP will quickly realise that a completely
different approach in operating technique has to be made if
successful DX QRP contacts are going to be made. One has to
find new ammunition to take the place of power when
competing with QRO stations in pile-ups, contests, etc. We
have already mentioned that knowledge of propagation and
accurate CW are two requirements, but in addition the QRP
operator must have a great deal of patience, cunning and skill:
when one is giving away at last 2 % 'S' points an attempt has to
be made to make up for it. The successful QRP DX -er has a
very ambitious approach and attitude to amateur radio. He
considerthat his extra cunning and skill more than make up for
the deficiency of 2 V2 'S' points compared to QRO colleagues,
and as a result will often attempt to call stations in
circumstances that other operators may describe as
impossible. The last thing he considers is that he will not be
successful because he is a QRP station! This ambitious
attitude, combined with patience, is the main reason for QRP
DX success.
Experience is a great thing and trial and error will quickly
teach the newcomer to QRP: how and when to call DX stations
successfully, and score over his QRO colleagues. The
experience the QRP operator acquires, often without realising
it, gradually results in him becoming a more skilful operator.
After all anyone using kilowatts can obtain a reply from a DX
station.
The vast majority of QRP contacts are made with CW and it
is with this mode that almost all two-way QRP contacts are
made: two-way QRP is the real test of an operators skill and
patience as, in addition to ensuring that his signal is copied by
the other station, he has to ensure that he is able to receive the
other stations QRP signal. I believe the most important factor
in successful two-way QRP is the ability to receive and copy
weak CW signals. A good receiver is therefore desirable, but
whatever receiver is used it is most important that it is aligned
and adjusted for maximum performance. In addition, some
form of filter should be regarded 'as a necessity as this will
greatly improve the reception of CW signals on even the best
receiver; preferably the filter should have a variable
bandwidth. There are many designs available for simple audio
filters which can be added after the audio amplifier state. As
Volume XXXVIII
565
THE SHORT WAVE MAGAZINE
adjusted it is a good idea to remove all unnecessary accessories
between the transmitter and transmission line, i.e. SWR
bridge, antenna switches, LP filter, etc. Anything placed in the
transmission line is going to have an insertion loss to some
degree. The low-pass filter should not be necessary at QRP
levels, whereas the SWR bridge can be removed once the
antenna has been adjusted. It would be better for the antennas
to be designed in such a manner that they are changed
physically by changing the coax to the transmitter rather than
have some fancy switching system which by its insertion into
the line causes some of the precious RF to be lost.
When 5 Watts is QRO
So far I have been referring to QRP as being in the region of
five watts input, but it should be said that some amateurs
would regard five watts as QRO. These amateurs are those
who use input power levels usually measured in milliwatts or
even microwatts. When using these very low power levels the
The station at G4BUE: see text for details.
well as getting rid of unwanted QRM, they can be used to
amplify the signal by incorporating an amplifier with the filter.
A noise blanker is another desirable accessory to combat the
many forms of QRM on the HF bands.
Whatever accessories are added to a receiver, they will all be
wasted if the operator does not make the effort himself to copy
weak CW signals. This requires a great deal of practice,
initially in the reception of CW to ensure that a good standard
is attained, and then on the bands amongst the QRM and other
forms of interference. There is no doubt that practice helps
make perfection, and it is frustrating to listen on the bands
during QRP contests at the number QSO's being missed
because other amateurs have not got the receiver or ability (or
both) to hear stations calling them.
Antennas
The antennas used by QRP operators are as varied as those
used by QRO operators. One thing they all have in common is
that whatever antenna they use it has to be used in the most
efficient manner possible. This means the antenna has to be
perfectly tuned for that part of the band or bands where it is
desired to operate, usually the QRP calling frequencies. In
addition the transmission line has to be perfectly matched to
the antenna and transmitter, and the SWR as near unity as it is
possible to obtain. When one is only generating a few watts of
RF it is essential that all of it reaches the antenna and is
radiated, even a slight mis -match could cause a slight reduction
in the amount of RF being radiated, and although this may not
be noticeable when using 150 watts, it would be noticeable
when using five watts. Ideally the feed point to the antenna
should be located as close to the transmitter as possible thereby
keeping the transmission line as short as possible.
After the antenna and transmission line have been finally
attention to efficiency of the PA, transmission lines, and
antenna adjustments become even more important.
If it is intended to operate a five watt QRP rig at milliwatt
levels it is no good merely reducing the drive control. This was
recently demonstrated to the author with his `Argonaut' when
he attempted to use an input of only 10mW. After reducing the
voltage to the PA from 12 volts to one volt, the drive was
adjusted for a current of IOmA: this resulted in only 576
microwatts output for an input of 10 milliwatts, an efficiency
of only 4.6%. One has to experiment with different voltage
and current combinations to find the most efficient method of
running the PA; in the case of an input of 10mW this proved to
be with 0.5 volt on the PA and a current of 20mA. A similiar
example is reducing the input of the `Argonaut' to one watt:
initially I retained the 12 volts on the PA and just reduced the
drive to approximately 83mA. As a result of experimenting, I
found the most efficient method of running the PA at one watt
input was with a voltage 4.25 volts and a current on 235mA
quite a difference!
The two cabinets referred to when describing the author's
QRP equipment house a voltmeter, and milliammeters with 1
amp, IOOmA and 25mA full scale deflection. These are inserted
in the voltage line to the PA of the `Argonaut' which is fed
from the variable PSU on top of the SWR bridge. In this
manner an accurate measurement of input power can be made
when using the `Argonaut' at different power levels, since in its
standard form it has no means by which input power can be
measured.
-
TVI
One of the advantages of using QRP is the virtual guarantee
to the absence of any form of television or audio interference
complaints. It is disturbing to hear of the number of radio
amateurs who do not operate during television hours because
of interference problems. If only those amateurs would
consider the use of QRP, it would enable them to obtain so
much more satisfaction from their hobby, whilst at the same
time preserve the friendship of their neighbours. In my own
case it is impossible for me to operate with 150 watts whilst my
next door neighbour has his television switched on. Without
going into all the details, both the Post Office and the
television manufacturer agree tha it is "an impossible case".
Legally I am entitled to carry on d operate with my 150 watts
despite the interference as my ow station has been cleared of
being the cause, but that is n t in the best interest of
566
THE SHORT WAVE MAGAZINE
neighbour/amateur relations, and so I use QRP during
television hours. It has been surprising how little this has
restricted my operating. Given reasonable band conditions I
am still able to enjoy QSO's with USA stations on 21 MHz
CW, and a weekly sked with a W6 station on 28 MHz is usually
made with QRP.
Recently G4FJF was in QSO with a West German station,
when the German amateur told Mike that he had to go QRT as
television was about to commence. Mike pursuaded the
German amateur to stay on the air, but to reduce his power to
five watts, which he did. The QSO was continued and there
was no complaint of television interence. Yet another amateur
shown the benefits of QRP operating! I therefore commend to
anyone who has interference problems to consider reducing
power and joining the ranks of QRP-ers.
Frequencies
To encourage two-way QRP contacts, international QRP
calling frequencies have been adopted on a world wide basis.
They are set out below and are used extensively by QRP
operators, especially at week-ends:
-
CW
SSB
3690
7090
14285
3560
7030
14060
21060
28060
21285
28885
These frequencies (kHz) have been very widely publicised
during the last few years and it is hoped that in time they will
become even more well known and QRO stations will avoid
them.
QRP Activity Periods are held to enable QRP operators to
meet on the air. The G-QRP Club hold weekly activity periods
on Sundays, as follows:
-
1100
1130
1400
1600
-
1230
1230
1500
1700
(GMT) on
(GMT) on
(GMT) on
(GMT) on
7030kHz
14060 kHz
3560 kHz
7090 kHz (SSB)
in addition the ARCI-QRP Club of the USA hold monthly
activity periods on the first Sunday of each month between
1500 and 0300 GMT on all the above frequencies.
Contests and Clubs
During the year there are a number of contests which are
held specifically for QRP operators. On the third week-end of
January and the third week-end of July the AGCW-DL hold
their Winter and Summer QRP Tests. There are four classes
determined by different power levels, and the contests are very
well supported. RSGB organise an annual Low Power Contest
which is held in April on 7 and 3.5 MHz. The scoring is again
determined by the power used.
Recently due to the increased interest and activity of QRP
operators some of the major world wide contests have included
QRP sections. The CQ WW Contests held over the last weekend of October (SSB) and the last week-end of November
(CW), and also CQ WPX Contests held in March (SSB) and
May (CW) all have QRP Sections defined as power not
exceeding five watts output. Stations in these QRP Sections only
compete against each other but a comparison with some of the
November, 1980
scores of QRO stations, show they achieve some remarkable
scores. In 1979 the RSGB included QRP section in their new 21
MHz CW Contest, which is now to be an annual event. The
ARRL in completely altering the format of their CW and SSB
DX Contests held in March, have now included a QRP
Section.
In addition to the contests mentioned above for QRP
operators, several week-ends throughout the year are set aside
for QRP Activity Week-ends organised by the G-QRP Club
and the AGCW-DL. All QRP operators are very welcome to
join in all the QRP activity periods, whether or not they are
members of the organising clubs.
There are several clubs which cater for the interests of the
QRP operator, and these have been briefly mentioned already.
By far the best of the QRP clubs is the G-QRP Club, which was
formed in 1974. Despite its name, membership is open to all
radio amateurs world-wide having an interest in QRP and at
present the membership is around 900 from 30 different
countries. The secretary of the club is Rev. George Dobbs,
G3RJV, who was responsible for its incorporation, but I don't
think he really envisaged just how quickly it would grow when
he started it back in 1974. A very professional club magazine is
produced four times annually containing everything of interest
to QRP operators. In addition they promote a very extensive
awards programme for QRP achievements, culminating in a
QRP Masters Award which is a plaque retained by the
recipient.
In the USA, the ARCI-QRP caters for the QRP operator,
although they define QRP as not exceeding 100 watts! They
promote certificates for Worked All States with Five Watts,
and the famous Thousand Miles Per Watt award. This
certificate is awarded to any amateur having achieved a QSO
whereby the miles per watt distance between the two stations is
in excess of one thousnd miles; the exact figure is quoted on the
certificate and endorsements in excess of one million miles
have been issued.
The Benelux QRP Group have just over one hundred
members from the Benelux countries, and have weekly activity
periods on the QRP frequencies. The majority of West
German QRP operators are members of AGCW-DL, which
although being primarily a CW club, promote the annual
Winter and Summer QRP Tests.
Probably the most difficult awards open to the QRP
operator, are those offered by Ade Weiss, K8EEG/O on
behalf of CQ magazine. The QRPp DXCC Trophy is awarded
for confirmation of QSO's with one hundred DXCC countries
whilst using a power not exceeding five watts output, and the
Milliwatt DXCC Trophy awarded for confirmation with one
hundred DXCC countries whilst using a power not exceeding
one watt output. Both trophies stand twenty-four inches high
and are intended to illustrate the high degree of skill and
dedication necessary to qualify for the awards. To date very
few (less than ten) of both trophies have been awarded.
Conclusion
hope this article will be read with interest by all radio
amateurs. To those already using QRP, I look forward to
having QSO's with you. To those amateurs using QRO, if you
decide not to try QRP, please try and avoid the international
QRP calling frequencies
thank you.
I
-
G4BUE is a regular contributor to "Communication and DX
News."
Volume XXXVIII
THE SHORT WAVE MAGAZINE
EQUIPMENT REVIEW
THE YAESU-MUSEN FT -707
`WAYFARER' TRANSCEIVER
RACK in the 1950s, long before the U.K. authorities would
ave anything to do with reciprocal licensing, the reviewer
operated from the Principality of Monaco. "Separates" were
used on the HF bands with their bulky, external power
supplies, interconnecting leads, relays and so on. A whole car
bootful of spares, test gear and soldering irons, as well as hefty
stepdown transformers was taken: all that for 50 watts of CW
and AM. By contrast, today's DX-peditioner or holidaymaker
can pack a complete high power, high performance, SSB/CW
station into a suitcase. The Yaesu Musen FT -707 "Wayfarer"
Transceiver is of this ilk.
Packaging and Accessories
The equipment for this review was supplied by Messrs.
S.M.C. Limited, the well known distributors of Yaesu Musen
products, and comprised the FT -707 transceiver, the FP -707
AC power supply, the FV-707DM digital VFO and the YM-35
scanning microphone. The first three items were separately
double -boxed, the equipment nestling safely and securely in
the usual bespoke expanded polystyrene supports. Included
with the transceiver was the DC power lead for mobile use,
with in -line, 20A, fuse, but there were no plugs for the
microphone and aerial sockets. Delivery was by Securicor Ltd.
The Manuals
The FT -707 Instruction Manual runs to 48 pages. It includes
a description, technical specification with semiconductor
complement, illustrations and descriptions of all the controls
and sockets, installation details and full operating
instructions. The circuit description is very well presented and
includes a complete block diagram, several separate circuit
diagrams of the main sections of the transceiver, plus a loose
leaf sheet showing how the many units are interconnected. The
Maintenance and Alignment section comprises nine pages,
amply illustrated by photographs, with all the necessary
"tweakable" components identified. The final section is an
eleven page parts list. This manual contains the circuit diagram
of the power supply.
The Instruction Manual for the FV-707DM Digital VFO is a
slimmer volume of twelve pages. It follows the same format as
that for the FT -707 except that there are no maintenance and
alignment sections. The circuit diagrams are on two, loose
sheets.
Descriptions
The FT -707 must be one of the smallest, multiband
transceivers available. The basic case measures 240mm. wide
by 93mm. high by 235mm. deep. The high power version
reviewed here has the 100 watts PA unit bolted on the rear and
this is 60mm. deep. The main tuning knob projects 32mm. A
retractable foot is provided so that the case can be tilted up at
about 7º for table top use.
567
The front panel layout can be seen in Figures 1, 2 and 3. The
dual concentric controls at the top left are for carrier level and
microphone gain. The eight -pin microphone socket is at the
bottom left with the eight ohms headphone, standard jack
socket in between. The power on/off switch is next to the
latter. From left to right, the seven push buttons are: manual
changeover, slow/fast AGC, 25 kHz calibrator, ALC on/off,
fixed channel selector, noise blanker on/off and clarifier. The
four controls at the bottom, from left to right, are: mode
switch, AF gain/RF gain, clarifier and variable bandwidth
tuning, and band selector.
On the large VFO tuning knob there is a skirt marked in 100
one kilohertz divisions which can be adjusted to coincide with
the digital frequency readout. The two tiny knobs below the
VFO knob are VOX gain to the left, and VOX delay to the
right. Signal strength, ALC voltage and relative power output
are displayed by ten bar LEDs, five green, three yellow and two
red ones. Receive and transmit frequencies are shown by six,
7.5mm. orange LEDs enabling the nearest 100 Hz to be read.
Other LEDs above the VFO knob indicate when the calibrator
is on, when the internal or external VFO is controlling the
frequency and when the fixed channel is in use. To remind the
operator when the clarifier is on, a small red LED lights up
next to the "CLAR" legend.
There are ten sockets at the back for: 13.5 volts DC power,
aerial, earth, morse key, external loudspeaker, low level RF
output for a transverter, eight volts DC output for pilot lamps
in the optional aerial coupler, accessories and external VFO. In
the bottom panel of the case, a small loudspeaker is provided.
The FP -707 AC Power Supply is in the same basic size case
as the transceiver and contains a four ohms impedance,
elliptical loudspeaker. A 700mm. long trailing lead with four
pin female plug is provided, together with a lead and miniature
jack plug for power and loudspeaker connexions to the
FT -707. On the rear, there are two posts to enable the FP -707
to be used to power other equipment requiring a regulated 13.5
volts DC at up to 20 Amps. on a 50% duty cycle, when not
being used with the "Wayfarer". The mains transformer has
two 117 volts primaries which are tapped, enabling AC inputs
of 100 to 234 volts to be used. The correct tappings are very
clearly indicated in both the FT -707 manual and the leaflet
with the FP -707. They have to be selected and soldered on the
actual transformer. There are two 16.5 volts secondaries
connected in parallel to a full wave bridge rectifier, followed by
99,000 µF of reservoir capacity. Three hefty, parallel connected pass transistors on generous heat sinks are used in
the regulator circuit.
The FV-707DM Digital VFO is the same size as the
transceiver but only 27mm. high. Two flying leads from the
back are terminated in plugs to mate with the Accessory and
Control sockets on the FT -707.
Band
metres
Table 1. This shows the signal
required in microvolts on each
band to give an S9 -plus -30 d6
indication.
10
12
15
17
20
30
40
80
µV for
S9+30 dB.
725
410
540
410
380
380
410
410
568
THE SHORT WAVE MAGAZINE
Circuit Descriptions
The FT -707 covers the present five HF amateur bands 80,
40, 20, 15 and 10 metres, the last in four 500 kHz sections, plus
the three new bands, 12, 17 and 30m. which will become
available later this decade. No 160m. coverage is provided.
The received signal is routed through a double, m -derived,
pi-section high pass filter with a cut off frequency of 1.7 MHz,
thence through a 9 MHz IF trap to the individual aerial coils
for each band. The single RF stage uses a 3SK73CR, dual gate
MOSFET which is bandpass coupled to the Schottky barrier
diode ring mixer type ND487C2-3R. The VFO, which tunes
5.5-5.0 MHz, is a modified Colpitts circuit. The buffered
output passes through a low pass filter to a pre -mixer, where it
is mixed with a crystal controlled oscillator signal. The
difference frequency is routed through bandpass filters,
amplifiers and buffers to the ring mixer, the output frequency
being the IF of 8.9875 MHz.
A 20 kHz crystal roofing filter is used ahead of the main
SSB and/or CW filters to provide sufficient bandwidth and
delay time for proper functioning of the noise blanker. The
variable bandwidth is achieved by mixing the 8.9875 MHz IF
signal with the output from a VXO operating around 19.7475
MHz, the resulting 10.76 MHz IF signal being fed through the
2.8 kHz crystal filter shown in Fig. 2. This signal is then fed
Fig. 1. Top view of the Yaesu FT-707
"Wayfarer" transceiver. The main board,
occupying the left hand two-thirds, is the
RF unit. The single line of eight cans at the
rear are the coils ahead of the RF
amplifier. The sixteen at the left form the
eight pairs of coupling transformers to the
ring mixer stage and the sixteen behind the
front panel are the premix bandpass
filters. The board at the right with the
40 -pin IC is the LSI counter unit.
November, 1980
back to another mixer where it is mixed with the same 19.7475
MHz VXO-ed frequency, thus reverting to the original IF. The
SSB or CW signal is demodulated in a diode ring circuit by the
carrier oscillator. An IC is used in a transformerless circuit
providing three watts of audio for the loudspeaker. The audio
circuit has an active low pass filter with a 2.7 kHz cut off and 12
dB/octave roll off.
The transmitter circuit is fairly conventional and makes
common use of the carrier oscillator, SSB filter and
VFO/premix circuits described in the receiver notes above. On
CW, the ring modulator is unbalanced. Two low power RF
stages are keyed by keying transistors and a sidetone oscillator
is incorporated, the level of which in the loudspeaker can be
adjusted by an internal preset control. AM is generated by
modulation of one of the three carrier oscillator stages and is
double sideband the SSB filter being bypassed.
Much thought has gone into the problem of protecting the
100 watts, broadband final stage against high SWRs. The lineup is a 2SC 1589 driving a pair of 2SC2395s in push-pull, into a
push-pull pair of 2SC2290s. A directional coupler senses any
high SWR and generates a control voltage which reduces the
gains of the AF, IF and RF stages. In the case of overdrive, the
ALC controls these stages. Excessive PA transistor
temperature is sensed by a thermistor and a control voltage is
Volume XXXVIII
THE SHORT WAVE MAGAZINE
569
Hg. 2. Top view with the RF board
partially lifted up to reveal the 1F unit. The
FT-707 Is supplied with one 2.4 kHz (- 6
dB.) crystal filter for SSB, partly visible
under the corner of the RF board. The
filter at the top left is a 2.8 kHz one
operating at 10.76 MHz in the variable
bandwidth circuit. The empty space
adjacent to it is for the optional, narrow
CW filter.
developed in a comparator which causes a cooling fan to be
switched on and the ALC line to reduce the gains of earlier
stages.
Between the broadband PA stage and the coupler, a low
pass filter circuit is included. Five separate double m -derived
pi -section filters are use, switched by five pairs of relays. They
cover the 80, 40, 30/20, 17/15 and 12/10 metre bands.
The calibrator, or marker generator, uses a 3.2 MHz crystal
oscillator and the signal is divided down in an F4024 binary
counter to 25 kHz multiples.
The FV-707DM Digital VFO is a digitally synthesized
oscillator employing a dual loop PLL system. Twelve
frequencies may be stored in the memories in the basic VFO
range and these can be recalled for receive or transmit or
transceive operation. The memorized frequencies can be
varied over the entire 500 kHz by pushing the "Clarifier"
button on receive and the "Shift" button on transmit. This
scanning can be controlled directly from the. Up and Down
buttons on the FV-707DM or from duplicate buttons on the
YM-35 Scanning Microphone. The normal scan rate is 1
kHz/second but the Fast button enables this rate to be altered
to 10 kHz/second.
Performance
Firstly the receiver function. The FT -707 was used almost
exclusively as a base station with a tri -band ground plane aerial
for 10/15/20 metres. In addition, crossed dipoles in theioft for
satellite reception were available on 10m. It is likely that the
majority of amateurs operating on the 10-80m. bands would
use some kind of multiband aerial system, such as a trapped
dipole and/or Yagi beam, so it was thought the system
mentioned would provide a fair test. The maximum VSWR of
these aerials was 2:1.
The "Wayfarer" proved to be very sensitive which is
desirable when mobile operation with inefficient aerials is
contemplated. It was difficult to make accurate sensitivity
measurements in the absence of an analog signal strength
meter. According to the figures above the bar LEDs, one lit up
is Sl; 3 is S5; 5 is S9; 7 is S9 -plus -20 dB; 9 is S9-plus -40 dB. and
all ten is S9 -plus -60 dB. To compare the sensitivity band -byband, the Heath IG-42 signal generator was used to supply a
signal sufficient to light up 8 LEDs, presumably equivalent to
S9 -plus -30 dB. The microvolts necessary to achieve this are
shown in Table 1. The centre of each band was used; e.g. 3.75,
10.25, 28.85 MHz. As far as could be deduced, S9 was
achieved with a 4-10µV signal.
The VFO tuning was beautifully smooth with complete
absence of backlash. The analog dial was set at "200" exactly
to coincide with 200 kHz on the digital readout. The maximum
errors were +2.0 kHz at "350" and -1.0 kHz at "250" and
"450", but this is of little consequence. It took about thirty
revolutions of the knob to cover the full 500 kHz, averaging
about 17 kHz per turn which made it quite easy to tune to the
desired 100 Hz.
VFO stability was excellent apart from an odd, jumping
effect which manifested itself occasionally whereby the
frequency lurched about randomly by one or two kilohertz.
Gently tapping the case could continue this phenomenon and it
created a sound in the loudspeaker akin to that of a
microphonic valve in an audio amplifier. Naturally it was
impossible to read signals when this effect happened and it was
probably a bit of suspect earthing internally.
The noise blanker was very effective on most noises of an
impulsive type. The FT -707 was used briefly in the writer's
Citroen car, one ignition lead of which is not of the proper,
resistive type. The noise blanker coped very impressively with
this situation. The next door neighbour, now in his eleventh
year of. D-I -Y drilling, hammering and general nuisance
creation, has a daunting collection of fiendish electric tools,
several poorly suppressed. Using the noise blanker, many
signals which were otherwise wiped out by the racket were
quite readable. It seemed to choti off some 30 dB of the
November, 1980
THE SHORT WAVE MAGAZINE
570
interference. As with most diode type noise blankers, when in
circuit, strong adjacent signals did cause slight distortion of the
wanted signal. Another effect noticed was that when it was
switched in, other adjacent signals became audible as if the
bandwidth had been widened.
The Clarifier control covered 6.4 kHz actually 3.5 kHz up
and the variable bandwidh control was
and 2.9 kHz down
found to be especially useful on CW.
At first, it was thought that the Digital VFO was a bit of an
expensive gimmick. However, it proved to be a useful
accessory as will be covered later.
The most searching test for any receiver is how it performs
on the 40 metre band where little amateur signals have to do
battle with the megawatts of what G6F0 used to call "The
Voice of Saudi Banana!" The FT -707 came through this test
with flying colours and it was possible to copy weak signals
right alongside the most powerful stations, thanks to the
sixteen poles of IF filtering. From the selectivity standpoint,
this was one of the best receivers yet used.
Unfortunately the performance on 10m and 15m using the
multiband ground plane left a lotto be desired. For example on
10m, when the band was devoid of amateur signals in the early
hours of the morning, the band was, nevertheless, full of
spurious signals. Some of these appeared to be coastal radio
stations such as "FUF" which tuned in on 28.141 MHz;
"UXN" on 28.120; "WCC" on 28.164; "IAR" on 28.336,
and a U.S. station on '28.407 giving aircraft weather
information on voice for the Bangor, Maine, and Pittsburgh
areas, etc. These signals were not present when using the 10m
dipoles.
Tuning across 15m, there seemed to be many heterodyne
whistles. Again there were occasions when the band was all but
closed yet there were dozens of pairs of stations tunable,
evidence of intermodulation distortion. Also, around 2200
GMT, a standard frequency transmission was tunable on
21.061, 21.071, 21.086, 21.096 MHz., and so on. These
shortcomings were taken up with Messrs. S.M.C. Limited
who inferred that diode switching of the RF circuits was the
cause of this problem. They suggested replacing ten resistors
by ones of a different value in the RF unit and a couple of
capacitors in the high pass filter unit. The calculated effect of
this latter idea would be to alter the cut off frequency from 1.7
MHz to around 6 MHz and this would undoubtedly adversely
affect the performance of the receiver on 80m. In any case, this
reviewer does not expect to have to make these kinds of circuit
alterations to improve the performance of equipment being
-
-
tested.
During these tests on 10m and 15m, the aerials were switched
frequently to the main station Hallicrafters SX-146 receiver.
These spurious signals were just not there on the SX-146, the
only non -amateur ones which were, were harmonics from
lower frequency broadcast stations and their attendant
jammers. It is worth mentioning that, despite its vintage, the
SX-146 also uses a 5.5-5.0 MHz VFO, a premixer system and a
9 MHz IF.
Secondly, the transmitter function. The "Wayfarer" was
connected to a large, 50 ohms dummy load incorporating a
2.5A. f.s.d. RF ammeter.The alignment instructions
recommend setting the maximum power output to 110 watts,
DC, at which level, seven LEDs should light up. The measured
maximum power output on each band is shown in Table 2
along with the number of LEDs illuminated.
The power input on CW is claimed to be 240 watts DC which
is well in excess of the 150 watts permitted by the Home Office
for U.K. amateurs. However, there is no provision for
measuring the input power as the bar LEDs indicate neither
final collector voltage, nor current.
The keying waveform was examined on the station monitor
scope and found to be excellent. Checks with other London
stations were carried out and the keying confirmed as very
clean, T9, and free of clicks. Semi -break-in operation is
possible by using the sidetone oscillator to activate the VOX
circuit and this was very convenient. The delay control is used
to set the "hang" time to the desired length.
On SSB, some lengthy tests were undertaken to establish a
firm conclusion about the speech quality using the Yaesu
YM-35 microphone. The final conclusions was not too
favourable in that the speech sounded lifeless, lacking the
essential crispness for maximum intelligibility on today's
crowded bands. As the received quality was quite satisfactory,
it was assumed that the microphone was the weak link. Two
were supplied and both were tried with identical results. These
600 ohms impedance microphones seemed to be rather
insensitive, it being necessary to talk quite loudly and closely
with the microphone gain fully up to achieve any worthwhile
power output.
The microphone plug is a non-standard, eight pin type and,
since no spare was supplied, it was impractical to try a better
microphone with a rising response, such as the Shure 444,
although that would have needed a matching transformer.
The ALC system worked very well and it was virtually
impossible to generate a flat-topped signal. However, the
'scope pattern verified low average speech power when
operated in accordance with the manual. VOX operation was
very effective and easy to set up and it was not necessary to
adjust the anti -trip control, which is inside the transceiver.
Reference was made earlier to the use of the Digital VFO.
During the period of use, several DX-peditions were going the
rounds, most working split frequency. The FV-707DM was
invaluable here, allowing the transmit frequency to be
generated by the external VFO while listening to the DX on the
internal VFO. By putting the "five up" or whatever frequency
in the memory and pushing the "TX Select" button, the
transmitted signal was automatically shifted.
the digitally
10m. for example
On certain bands
displayed memorized frequency went mad as soon as the key
was pressed or the microphone used, with numbers changing at
random. It was impossible to know what frequency one was
transmitting on. It was assumed that some unwanted RF was
-
-
Frequency
MHz
DC output
watts
No. of LEDs
illuminated
3.65
7.05
10.125
92
8
8
14.175
18.118
21.225
24.940
28.250
28.750
29.250
29.600
88
90
92
8
98
108
8
200!
120
116
113
8
7
7
113
7
8
7
7
Table 2. This shows the measured DC ouput in the centre of each
existing and proposed new band and the number of LEDs illuminated
indicating relative power output.
Volume XXXVIII
THE SHORT WAVE MAGAZINE
571
Fig. 3. Bottom view. The screened box at
the right contains the VFO circuitry. The
rest is the AF unit comprising the SSB
generation, VOX, CW sidetone and AF
circuits. The empty sockets in front of the
eleven cans are for crystals for fixed
frequency operation. The perforated,
screened compartment at the rear houses
the low and high-pass filters, with the 100
watt PA unit bringing up the rear.
upsetting the operation. This may have been due to the
proximity of the aerial to the equipment or perhaps an
inefficient earth. The manual recommends an earth lead less
than 10 feet in length, though how this can be achieved from a
first floor room is not explained.
"
Use with a VHF Transverter
As an enthusiastic VHF operator, the reviewer was very
keen to try the FT -707 with the two metre transverter.
However, this cannot be done without the use of an external
relay connected to the transceiver 's aerial socket wired to route
the RF to a dummy load on transmit and to the transverter's
28-30 MHz output on receive. A low level RF output, phonotype socket is provided to drive a transverter. The output is 220
mV. across 50 ohms, equivalent to a paltry milliwatt of power.
As the writer's transverter, in common with many others,
needs 200 milliwatts of drive, it would have meant building a 23
dB. gain stage to enable the "Wayfarer" to be used with the
"Europa" transverter.
The FT-707 was, however, used as a tunable IF and proved
to be a virtually "bomb -proof" combination. With such a
sensitive receiver, though, attention must be paid to the overall
gain distribution and it is not necessary or desirable to employ
much converter gain ahead of the FT -707.
Conclusions
The Yaesu Musen FT -707 and FV-707DM are
unquestionably very advanced pieces of engineering and a far
cry from the bulky and inefficient valve-type transceivers of
the 1960s. The quality of the components and workmanship
are high, all the components being clearly identified on the
p.c.b's making servicing simple. On reflection, it is quite
astonishing to realise that an eight band, CW/SSB/AM, 240
watts transceiver can be accommodated in such a small case. It
is a pity that 160 metre coverage was not included in this ideal
mobile transceiver, in view of the outcome of WARC 1979, but
no doubt, it would be difficult to make a broadband PA
covering four octaves.
For home station use, it would seem essential to use an aerial
tuning unit, particularly on the higher frequency bands if a
multiband aerial system is contemplated, in order to overcome
the intermodulation problems referred to earlier. The FC-707
aerial coupler forms part of this "line" but was not tested.
There is little doubt that the Yaesu microphones are not
worth buying as they do no justice to the rest of the equipment;
spoiling the ship for the proverbial ha'porth of tar! In any case,
the YM-35 scanning microphone is only necessary if one has
the FV -707 DM VFO, since there is no scanning circuitry in the
FT -707 on its own. The writer is convinced that a decent
microphone with a rising response would transform the
transmitted speech quality from itnediocre to excellent.
Finally, a word of thanks to John Nelson, G4FRX, with
whom lengthy tests were carried out on ten metres. As a
professional broadcaster, his critical appraisal of the signal
from the Yaesu station was invaluable.
N.A.S.F.
572
THE SHORT WAVE MAGAZINE
CLUBS ROUNDUP
By "Club
the painstaking ones "just checking" because they've
misunderstood something on the local natter -net, or because
they've forgotten where to look! Seriously it's a good one
we always read it from cover to cover. Now it tells us that at
Trinity Church, Ifield, on November 26, they will have both the
RSGB's RR, G3MDO, and the AR, G3JMB to explain all
about RSGB.
Cray Valley's base is at Christ Church Centre, High Street,
Eltham on the first Thursday in each month. This is November
4. We were saddened to see two obituaries on the back page of
the current newsletter, and we offer sympathy to the relatives,
and the club.
-
Secretory"
ACTON, Brentford & Chiswick have their place in Chiswick
Town Hall, High Road, Chiswick, on Tuesday, November
18, when G3IGM will be talking about Grid Dip Oscillators.
If you operate your rig in the /M style, and a lot of us do,
then you should consider the idea of joining A.R.M.S. All the
details can be obtained from the Hon. Sec. -see Panel.
The George Hotel in Axminister is, we understand, the new
home of the Axe Vale gang, on the first Wednesday of each
month. However, since their letter was written before the
meetings there could commence, and we've heard no more,
perhaps it would be a good thing to check with the Hon. Sec. at
the address shown against the club in the Panel.
Every evening of the week there is something going on at the
Hq of the Barking lot in Westbury School, Westbury
Recreation Centre, Ripple Road, Barking. The "proper" club
night is on Thursdays, and the Morse class takes the Tuesday
evenings; the rest, it seems, are open dates.
B.A.T.C. caters for the interests of the amateur television
fraternity, and we note also a developing interest in the
application of home computers to ATV stations. Details from
the Hon. Sec. see Panel, and note the new address.
At Bishops Stortford the group foregather in the British
Legion Club, at the top of Wind Hill. Wind Hill runs out of the
town to the west, heading for Much Hadham. It has always
been a matter of the third Monday in the month, and there is
usually something arranged to interest. Generally, arrival a
few moments before 8 p.m. and straight into the bar will result
in your hearing the familiar jargon of amateur radio over
towards the window, until the Hon. Sec. begins to prise them
out and upstairs to the Committee Room, where the meeting
proper starts.
Bournemouth have their base at the Dolphin Hotel,
Holdenhurst Road, Bournemouth, where they are set up for
the first and third Fridays in each month, 7.30 for 8 p.m.
Between the date of their newsletter and your reading this, they
have an AGM, and thus the new committee will be getting busy
on the new programme.
On we go now to Bury where the venue is the Mosses
Community Centre, Cecil Street, on Tuesdays, with the main
date on the second Tuesday each month. Thus we see
November 11 down for a Surplus Equipment Sale. It is
pleasing to note from their letter that they have been regaining
old members and recruiting some new ones of late someone
is putting some effort in, which can't be bad!
At Cornish, the October date was at a different venue with
seating for 170 we wonder they don't try always for that as
the usual SWEB Clubroom, Pool, Camborne is always
bulging on meeting nights! November 6 is down for a Surplus
Equipment Sale, just right for those who have brought goodies
back from Leicester and have to get rid of something quick to
placate the XYL!
Crawley's newsletter editors sound somewhat disillusioned
about their efforts, largely due to the number of folk who ring
them up to ask what's on at the next meeting; from which they
deduce no one reads their effort. Not so, we think. Probably
-
-
November, 1980
MCC! MCC! Get your gear together, gird your best
operators, put up the best aerials ever, and prepare to
do battle! Dates and Rules were given in full on p. 494
in last month's issue. All good clean fun, no butting or
low blows. Roll up and beat the champs! If you can't
beat the champs, at least you can beat that other mob
down the road
so get them to make an entry as well
to prove it!
-
Appeal
In the Cray Valley newsletter we have a transcript of letters
passing between G2BVN and the club, with the trigger a letter
from AMSAT-DL. In essence it says that the replacement of
the lost Oscar is "on" given only the needful funds, for a 1982
launch. All the team's key people are staying on, money is the
holding factor. One pound (two pints of beer or thirty fags!),
from every amateur in the UK will virtually guarantee
success in the appeal from the UK angle. Have a whip round at
the next club meeting, or a raffle or something similar, and
send the proceeds to AMSAT-UK, c/o 94 Herongate Road,
Wanstead Park, London E12. Mark the outside of the
envelope "AMSAT Project OSCAR"
and as for you chaps
who don't belong to clubs, send your contributions direct.
-
Back to Work!
It's not very often we stop in the middle of "Clubs" for an
appeal, but we couldn't let that one pass!
Crystal Palace now, and they have some more Silent Keys to
report
G2VB, G2FOZ and G3ADL, all of whom had
something to do with the build-up of club life in the area, and
all will be missed. To turn to the November meeting, the group
will be at Emmanuel Church Hall, Barry Road, London SE23;
on November 15 (a Saturday evening) to hear a talk on
Generating Electricity from G4AVV and G8GJO.
If you are interested in D/F, then Dartford Heath D/F are,
so far as we know, the only club having this as a prime interest.
On the other hand they do have a lot of other activities and a
very good newsletter. They have just seen their tenth
anniversary and it was good to hear that Maureen, G3XVC,
who was one of the founding group was out hunting again.
Details from the Hon. Sec. -see Panel; meetings generally are
at the Scout House, Broomhill Road, Dartford, Kent.
At Derby the club have a place of their own at 119 Green
-
Lane, on the top floor. Every Wednesday there is something
set up: November 5, Bring and Buy Sale; on 12th a visit by J.
Birkett of Lincoln; 19th a talk on Practical Computing, and
26th on Aircraft Safety. The one on 19th, by the way will be
illustrated by several different varieties of home computer.
Volume XXXVIII
THE SHORT WAVE MAGAZINE
573
Name and Addresses of Club Secretaries reporting in this issue:
ACTON, BRENTFORD & CHISWICK: W. G. Dyer,
Gunnersbury Avenue, Acton, London W3 8LB.
G3GEH,
188
A.R.M.S.: N. A. S. Fitch, G3FPK, 40 Eskdale Gardens, Purley, Surrey
CR2 IEZ.
AXE VALE: Mr. & Mrs. Retter, G4JBG, 48 Fairway Rise, Chard,
Somerset TA20 INT. (Chard 4163).
BARKING: A. Sammons, G8IZN, 80 Lyndhurst Gardens, Barking,
Essex IGII 5BZ. (0/-5942471)
2 Holmes Lane, Bottesford, Scunthorpe.
BISHOPS STORTFORD: T. E. White, G8LXB, 79 Elmbridge, Old Harlow,
B.A.T.C.: M. Cox, G8HUA,
Essex.
BOURNEMOUTH: G.
R. Freeth,
G4HFQ,
Hants. BH25 6EY. (New Milton 618092)
BURY: M. Bainbridge, G4GSY,
7
(061-761 5083)
9
South Avenue, New Milton,
Rothbury Close, Bury, Lanes. BL8 2TT.
CORNISH: S. T. S. Evans, G3VGO, "Glengormley", Carnon Downs. Truro.
Cornwall. (Devoran 864255)
CRA WLEY: D. L. Hill, G4IQM, 6 Reigate Close, Pound Hill, Crawley, West
Sussex RH I03TZ. (Crawley 882641)
P. J. Clark, G4FUG, 42 Shooters
CRAY VALLEY:
(01-858 3703)
Hill Road, London SE3.
CRYSTAL PALACE: G. M. C. Stone, G3FZL, II Liphook Crescent,
London SE23 3BN. (01-699 6940)
DARTFORD HEATH D/F: A. R. Burchmore, G4BWV, 49 School Lane,
Horton Kirby, Dartford, Kent DA4 9DQ.
DERBY: Mrs. J. Shardlow, G4EYM, 19 Portreath Drive, Darley Abbey,
Derby DE3 2BJ. (0332 556875)
DOUGLAS VALLEY: H. Hughes, G4HSC, Brockley House, Warrington
Road, Goose Green, Wigan. (Wigan 41670)
DOVER: P. Chamberlain, G8EGT, 59 Lapel Street, Capet -le-Ferne,
Folkestone, Kent CT18 7LY. (Folkestone 42387)
DUMFRIES & GALLOWAY: C. Rodgers, GM8TKA, 5 Elder Avenue, Lfneluden, Dumfries DG2 ONL.
EAST LONDON RSGB: R. Holmes, G3PKQ, 92 Dunedin Road, Leyton,
London EIO 5NJ. (01-558 2928)
EDGWARE: D. L. Lisney, G3MNO,
119
Draycott Avenue, Kenton, Harrow
HA3 ODA. (01-907 1237)
EDINBURGH: A. Nadauld, GM3RFQ, 171 Causewayside (2F/1),
Edinburgh EH9 1QF. (031-668 1749)
EXETER: G. Draper, Canyon Close, Heavitree, Exeter EX1 3AZ. (Exeter
1
37170)
EX -G Radio Club: F. W. Fletcher, G2FUX, 53 St. Ives Park, Ringwood,
Hants. BH24 2JX. (Ringwood 3561)
G-QRP: G. C. Dobbs, G3RJ V, 17 Aspen Drive, Chelmsley Wood,
Birmingham B37. (021-770 5918)
GUILDFORD: L. Bright, G4BHQ, 4 Dagley Farm, Shalford, Guildford,
Surrey. (Guildford 76375)
HEREFORD: S. Jesson, G4CNY,
181
Kings Acre Road, Hereford. (Hereford
3237)
IPSWICH: J. Tootill, G4IFF, 76 Fircroft Road, Ipswich. (Ipswich 44047)
I.R.T.S. (Region 1): G. Gervin, EIBCC, 185 Elton Court, Leixlip, Co. Kildare.
ISLE OF WIGHT: T. Fallick, G4FYI, "Harmony", Main Road, Chillerton,
Newport 1.o. W. (Chil/erton 328)
Douglas Valley newsletter has a map of the club location on
its front cover. For details of the club programme either
contact the Hon. Sec., see Panel, or toddle along to
Shevington Conservative Club on Thursday evenings, except
the second one in each month, and they are in the upstairs
room.
At Dover we find ourselves in a bit of a quandary as to the
clubs "proper" title. Anyway, they are at the YMCA,
Godwyne Road, Dover. November 5 is a natter-nite, on 12th
G8HNZ will talk about "Technical Aids for the Blind" (how
about making a tape -and -slide one of this?). November 19 is
down for a session on Project De -bugging, and on 26th
Contest Preparation forms the subject. There is talk -in
available from G3YMD on S20, or GB3KR, for any visitors.
Dumfries and Galloway are based on the Cargenholm
Hotel, Newabbey Road, on the first and third Mondays of
each month. November 3 is to be a social evening at
Cargenholm Hotel and on 17th there will be a lecture demonstration on "Satellite Picture Techniques" by
GM8FRD.
At the time of writing East London RSGB will have begun
activity after the summer lay-off. They are at Wanstead
House, 21 The Green, Wanstead, El I. November 16 at 3 p.m.
sees G8DPB giving a talk and demonstration on 10 GHz
-
JERSEY: S. Smith, GJ8EZA, 19 Parade Road, St. Helier, Jersey, C.I.
,(Jersey 23249)
KIDDERMINSTER: R. Manton, G4ILQ, 7 Osborne Close, Offmore Farm
Estate, Kidderminster. (Kidderminster 4930)
MELTON MOWBRAY: R. Winters, G3NVK, 32 Redwood Avenue, Melton
Mowbray LE13 1TZ. (Melton Mowbray 3369)
MEXBOROUGH: I. Abel, G3ZHI, 9 Grove Terrace, Maltby, Rotherham,
Yorks. (0709 814911)
MILTON KEYNES: W. Backhouse, G4HZI, 46 Tattenhoe Lane, Bletchley,
Bucks. (Milton Keynes 77479)
NORTHERN HEIGHTS: M. Topham, G8NUC, 1200 Gt. Horton Road,
Bradford. (Bradford 73271)
NOTTINGHAM: M. C. Shaw, G4EKW, 50 White Road, Nottingham
NG5 IJR.
R.A.I.B.C.: Mrs.
F.
Woolley, G3LWY,
9
Surbiton KT6 4TE.
Rannoch Court, Adelaide Road,
REIGATE: Dr. J. S. Roberts, G8FDJ, 15 Bakehouse Road, off Horley Row,
Horley, Surrey.
ROLLS-ROYCE (Bat noldswick): L. Metcalfe, G4IEX, I Park Avenue,
Saltforth, by Colne, Lancs. (Barnoldswick 813433)
ROYAL NAVY: M. Puttick, G3LIK, 21 Sandyfield Crescent, Cowplain,
Portsmouth P08 8SQ. (Waterloovi/le 55880)
ST. NEOTS: P. Herod, G8TQI, 49 Luke Street, Eynesbury, St. Neots, Cambs.
(Huntingdon 74642)
SOUTH DORSET: R. Cridland, G3ZGP, 13 Clarendon House, Redlands,
Weymouth. (Upwey 812893)
SOUTHGATE: J. Fitch, G8EWG, 16 Kent Drive, Cockfosters EN4 OAP.
(01-440 7353)
STEVENAGE: E. Godfrey,
94
Common View, Letchworth. (Letchworth
72184)
STOURBRIDGE: C. Williamson, G4IEB,
(Stourbridge 2006)
SURREY: R. Howells, G4FFY,
7
14
Lawn Street, Stourbridge.
Betchworth Close, Sutton, Surrey SMI 4NR.
(01-642 9871)
TYNESIDE: J. Dingwell, G4ILW,
& Wear NE9 6TN.
VERULAM: A. Clarke, G8MAE,
IO
Loweswater Road, Gateshead, Tyne
24
Kiln Ground, Hemd Hempstead
HP3 8EZ. (Hemel Hempstead 64751)
WACRAL: L. Colley, G3AGX, Micasa,
13
HU7 5XU.
WATERSIDE: C. Saunders,
G4KCM,
Ferry Road, Wawne, Nr. Hull
Forest Edge Estate, Fawley,
Southampton SO4 1FN. (Fawley 893200)
WEST KENT: B. P. Castle, G4DYF, 6 Pinewood Avenue, Sevenoaks, Kent
TN l4 5AF. (0732 56708)
WIRRAL: G. O'Keefe-Wilson, O8VPE, 20 South Drive, Upton, Wirral.
(051-677 1531)
WORCESTER: M. Tittensor, G4EKG, 16 Dursett Road, Evesham, Worcs.
W R t l 6EQ. (0386 41105)
YEOVIL: D. L. McLean, G3NOF, 9 Cedar Grove, Yeovil.
35
YORK: K. R. Cass, G3WVO, 4 Heworth Village, York.
1ST RAINWORTH SCOUTS RADIO CLUB: J. M. Coates, G4GYU,
30 Abbott Road, Mansfield, Notts.
away from all the squeakers and jammers!
It's nice to hear a club secretary saying his programme is
firm until the end of the year
Edgware are in that happy
state. November 13 is set aside for G3BNL to talk about
Microwaves, and November 27 is the informal, both meetings
being at Watling Community Centre, 145 Orange Hill Road,
Burnt Oak, Edgware.
On we go to Edinburgh where we are told the group still have
their place at Carlton Hill Observatory, each Tuesday saving
for Christmas and the New Year. Details on the doings can be
obtained from the Hon. Sec.
see Panel.
Exeter have had a shift -round in their November
programme which now reads November 3 "Any Questions",
in which a lecturer from the local college will attempt to answer
the sort of questions which may crop up in RAE; and on
November 10 there will be a Surplus Sale. Hq is at the
Community Centre, St. Davids Hill in Exeter.
The Ex -G Club is for those who were born in UK or whose
parents were born or naturalised in UK but who are domiciled
abroad. Details from the UK Hon. Sec., at the address in the
Panel.
Now we come to a club which is also very much international
in membership, namely the G-QRP Club, which now has
almost 900 members, an increasing proportion of whom come
-
-
574
November, 1980
THE SHORT WAVE MAGAZINE
from overseas. Every issue of the club magazine, Sprat, has
lots of interesting stuff in the way of QRP gear articles, and
talk of interest to the members.
At Guildford the venue is at the Hq of Guildford Model
Engineers Society, in Stoke Park, on the second and fourth
Fridays. November 14 is down for an Equipment Sale, and on
28th there is the Construction Contest.
It's the month for getting rid of the junk and getting
silverware for the sideboard (if you do things right, that is!) at
Hereford. November 7 is down for the Grand Junk and
Equipment Sale, and on 21st comes the Construction Contest
for which a big entry is hoped this year. The Hq address is
County Control, Civil Defence Hq, Gaol Street, Hereford.
On to Ipswich where the long timetable they sent earlier in
the year has now run out (hint!). So
we must refer you to
their keen Hon. Sec. at the address in the Secretaries' Panel.
I.R.T.S. usually send over their newsletter, but it hasn't
turned up at the time of writing, so for details on any of the
activities in Eire we refer you to the Hon. Sec.
doubtless he
will be able to point you in the right direction! His name and
address appear in the Panel.
Isle of Wight have forgotten to tell us when they foregather,
although they did quote the venue. Luckily we have a card index for such eventualities and we can say look for them on
Friday evenings at Unity Hall, Wootton Bridge, I.o.W.
In Jersey the venue is the Communicare Centre,
Quennevais, St. Brelade, on the second Wednesday evening in
each month. At the time of their newsletter writing the
November 12 date was an Open evening.
At Kidderminster they have an excellent newsletter which
tells us that on November 11 they have a film show, at
Aggborough Centre, Hoo Road, Kidderminster.
One thing we can always guarantee and that is the notice of
the AGM from Melton Mowbray; a pity it's dated for
September 19 and we are writing the November piece!
However, this doesn't alter the fact that the group are and have
been steadily operating at St. John Ambulance Hall, Asfordby
Hill, Melton Mowbray for more years than your conductor
has been writing this piece. Details from the Hon. Sec. -see
Panel for his address.
Every Friday evening is the time for the Mexborough lot, at
Dolcliff Hall, Dolcliff Road, Mexborough, with the early
starting time of 7 p.m.
November 10 at the Lovat Hall, Newport Pagnell is the date
and venue for the Milton Keynes group who will be hearing
about Rocket Propulsion.
Now we are off up North, to Northern Heightsand their Hq
at the Bradshaw Tavern; we don't have the latest gen, but a call
to the Hon. Sec. will no doubt get it for you or just turn up
on a Wednesday evening. Halifax bus routes 3 and 26 pass the
door.
Nottingham have their place at Sherwood Community
-
R.A.I.B.C. is the club with the interest in the blind and
disabled in our hobby; the full member is helped to become an
SWL by way of a receiver, and then encouraged to head after
the RAE pass and Morse test for a full licence
all this of
course being done by the help of a class of members known as
`supporters' and `representatives'. Funds of course are always
needed how about your club doing something about it?
Pressing on to Reigate we see they have a meeting on
November 18, but we have no details. They foregather in the
-
-
Upstairs Meeting Room of the Constitutional and
Conservative Centre, Warwick Road, Redhill.
Barnoldswick is near Colne, Lancs., and it is here the RollsRoyce club have a place in the R -R Sports and Social Centre.
There is a shack for their exclusive use and the use of a
comfortable lounge seating up to 70 people for their main
meetings on the first Wednesday in each month. Details from
the Hon. Sec.
see Panel.
-
-
-
Association, Woodthorpe House, Mansfield Road,
Nottingham. November 6 is the monthly Forum, and on 13th
there is a talk on High Definition Television. Activity Night is
on 20th, and on 27th they have a demonstration by Lowe
Electronics.
Deadlines for "Clubs" for the next three months
-
---
(December issue October 31st)
January issue November 28th
February issue
January 2nd
March issue
January 30th
Please be sure to note these dates!
The Royal Navy newsletter is always looked forward to,
being full of news and interesting articles. Any ex -RN types
would find a subscription well worth while. Details from the
Hon. Sec. see Panel.
At St. Neots they have a place at Ernulf Community
Association, where they are to be found on alternate Monday
evenings. More details from the Hon. Sec. at the address in the
-
Panel.
Back down south again, this time to South Dorset; they have
a change of venue in the offing and so we feel it would be best
to contact the Hon. Sec. for the details his address is in the
appropriate place in the Panel.
November in Southgate sees the G6QM Trophy being
competed for, by all the best home -constructed equipment
experts in the club. That is on November 13 nearly 23 years
ago your scribe had an entry in that same contest for the same
-
-
trophy!
On the first and third Thursdays in each month, the
Stevenage crowd foregather in the Senior Staff canteen at
British Aerospace Dynamics group, Gunnels Wood Road.
November 6 is down for a talk on the Royal Observer Corps,
and on November 20 a talk by G8KMG on popular music
"Short Wave Magazine" is the only freely available periodical in the U.K. published
exclusively for the radio amateur, licensed or SWL.
Volume XXXVIII
THE SHORT WAVE MAGAZINE
through the ages. A special -event station/stand will be
operated at Davids Book Fair at Letchworth on Saturday 29th.
Our next is a camel -train visit to Stourbridge where
Longlands School, Brook Street is the the venue. November 3
is down for Construction, and on November 17 comes the
Annual Surplus Sale.
Surrey get together at T.S. Terra Nova, 34 The Waldrons,
South Croydon. The routine is `first and third Wednesdays',
but we do not have the current details for November; doubtless
the Hon. Sec.. would be pleased to tell you
see Panel
or
why not just pay them a visit.
Up to Tyneside now, and Vine Street Community Centre,
Wallsend, on Monday evenings. It sounds as though they are
really go-ahead and enthusiastic.
Verulam have, as we have indicated in recent pieces, moved
out to the Charles Morris Memorial Hall, Tyttenhanger
Green, Tyttenhanger, near St. Albans. The informais in the
winter are at the RAFA Hq in St. Albans. For all the latest
details contact the Hon. Sec. see Panel. (We could add that
it's a long time since we've not had a duplicate updating, and
even longer since they had a meeting with nothing organised!).
WACRAL is a world-wide group of committed Christian
radio amateurs regardless of denomination. Details can be
obtained from the Hon. Sec.
see Panel.
Over now to Waterside, a name which hides a club covering
the area of Hythe, Fawley and New Forest. The Hq is at
Blackfield Community Centre, 1900 clock on the fourth
Tuesday of each month, and the set-up is usually to start with a
talk or similar, followed by an informal discussion. More
details from the Hon. Sec. at the address in the Panel.
No doubt about it, the West Kent newsletter is eye-catching,
and interesting. Having photography as a second hobby, the
writer was more than a little interested in G4DYF's chemical
balance, and there is now something rather similar in "Club
Secretary's" shack. November 7 sees them getting on the new
bands without a new rig, courtesy G3R00, and on November
21st, some hints on good HF operating are dispensed by
G6TQ, and on VHF by G8KPZ. The Adult Education Centre,
Monson Road, Tunbridge Wells is the Hq.
Up to Wirral where they are based on the Sports Centre,
Grange Road West, Birkenhead, on the first and third
Wednesdays in each month. However the newsletter we have
here indicates no meeting on November 5
we bet there'll be
fireworks among the members about that! Details on what
goes on can be had from the Hon. Sec.
see Panel.
Worcester have November 3, the venue being the Old
Pheasant in New Street; we understand there is to be a talk on
radio control of models.
Every Thursday evening a 7.30 you will see people going into
Building 101 at Houndstone Camp, Yeovil; the last meeting of
each month is a natter session, but the earlier ones are all
"organised" with a talk or films or whatever.
When one talks about encouraging visitors, York must be
one of the best
recently they have had as many as seven at
one meeting, including ON7TH and family. They enjoyed
themselves, and so would you if you went to a York meeting at
the United Services Club, 61 Micklegate, York, on every
Friday save the third one in each month.
Our final letter comes from the 1st Rainworth Scouts Radio
Club, to say they would be on in J -O-T -A for the Mansfield
Scout Council. However, there is still time for us to note they
have GB4RHC as their call -sign and will be at Robin Hood
Camp. Details from G4GYU see Panel. We could comment
that this is one of the few clubs which are part and parcel of a
-
-
575
scout troop; and why not indeed? There should be more, but of
course the ACF and ATC tend to be reaching out after all the
technical talent around and so the scouts get left behind. A
pity.
Deadline
-
Will be as given in the 'box' in the body of the piece the
bold one's the MCC reminder! See you at Leicester and on
the air during MCC?
For your club details, please let us have 'em here on or
before the due date; the address is "Club Secretary", SHORT
WAVE MAGAZINE, 34 HIGH STREET, WELWYN, HERTS.
AL6 9EQ,
-
-
-
-
-
We don't think Ferdinand Wolf, DF3PU, is really trying with this
rather poorly equipped mobile station. After all, having fitted his
Mercedes with an IC-701 with outboard VFO, and IC -211E (both rigs
with computerised remote control), electronic keyer and RF
processor, Trio 70cm. FM transceiver, HAL RTTY system with
keyboard and video display which can also copy conventional Morse
onto the screen, SSTV and ATV receivers (both kinds of TV could be
transmitted if the authorities would give permission), an oscilloscope
and SWR meters, Swan 5 -band HF vertical, 5 -element Yogi for two
metres (vertical or horizontal polarization), an 1B9CV for 70cm, and
various whips for two metres, the very least he could do is fit an
autopilot, head -up display and weather radar .. .
576
THE SHORT WAVE MAGAZINE
AN INEXPENSIVE, LIGHTWEIGHT
MAST
November, 19$0
3" SQUARE
21/8"SQUARE
13/4"
D. J. WALTERS, G4DFV
3/g"
4 Holes
1/4"dia
EN the author moved QTH recently, the new location
offered a more substantial area of land on which to begin
the construction of the proverbial "Aerial Farm", albeit on a
much smaller scale than that at some lucky amateur stations
where the operator may have access to an acre or more of
ground. The new QTH had a larger garden space than that of
the previous location, where the only antenna was a vertical
due to lack of garden. The new garden measured 20 yards long
by 6 yards wide, and it was envisaged that a longwire type of
antenna system would fit comfortably within the boundaries
of this area, inclusive of the necessary support provided by a
suitable mast.
It was decided that a height of 30 feet would be sufficient to
afford a reasonable height for the mast, whilst the distance
from the base of the mast to the guy anchoring points would
still be within the width of the garden, thus providing the
maximum stability.
'Bottom' end of one
12ft bamboo
Steel rod
(or similar).
1/4"
1/8" Steel rod
(or similar) -one
each side.
Outer rods covered
with pvc tape
1
2 Holes
Hole
3/16'dia
5/16'dia
Fig. 2
GUY PLATE DETAIL.
(16swg Aluminium).
The choice of material for the mast was decided upon by the
factors of weight, strength and durability, as well as the cost of
materials. Bamboo was chosen as a suitable material, as the
author already had a stock of 12 foot lengths which had been
acquired from a local carpet warehouse. These cost 25 pence
each, and were originally purchased with the idea of making a
cubical quad antenna, but it was thought that they might make
a simple yet sturdy mast which could be especially useful to the
young SWL or newly -licensed teenaged amateur who might
not be too well flushed financially to afford one of the more
expensive commercial masts.
Construction
Constructing the mast was found to present little difficulty,
and was basically straightforward, once the idea ofjointing the
bamboo was decided upon.
The initial consideration was the preparation of the three
lengths of bamboo. Each was approximately 12 feet long, and
about 1 %2 inches in diameter at the widest point, and tapering
to about inch at the other end. It was noticed that the tapering
was only apparent within the last two feet of the length of the
poles, so the lengths of the poles were shortened to 10'feet each.
The problem of joining them was solved by utilising lengths
of 1/4 -inch mild steel rod, inserted through the inside `walls' of
the bamboo at the ends of the poles at the points of joining.
Guy plates were then sandwiched between the joints, and
lengths of 1/4 -inch mild steel rod were also threaded through
the guy plates and fastened to the poles at each side of the joint
to prevent the guy plate from spinning round. The lengths of
1/4 -inch rod depended upon the distance between the walls
1
16swg Aluminium
guy plate
1/4" Rod
inserted
through first wall
Table i
Nylon Guys
'Top' end of one
12 ft bamboo
Fig.1
SECTIONAL VIEW THROUGH JOINT IN MAST
Top Set = four 40 -ft. lengths
Middle Set = four 35 -ft. lengths
Bottom Set = four 23 -ft. lengths
Lanyard = one 50-ft. lenth
Material required: 150-yds. nylon cords; three 12 -ft. bamboo poles; two
2-ft. by 1/4 -in. mild steel rods; four 1 -ft. by 1/4 -in. mild steel rods (or piano
wire); two 3 -in. square 16 s.w.g. aluminium sheets; pulley unit; nylon
aerial insulator; PVC insulating tape and aluminium paint.
Volume XXXVIII
THE SHORT WAVE MAGAZINE
577
inside the bamboo at the area of joining. It was decided that the
rods could be knocked through the first wall nearest the end of
the poles, but could rest on the second wall inside. This
technique produced a fairly substantial joint, as is shown in
Fig. 1. Both joints were accomplished in this manner; the guy
plates were fashioned from 16 s.w.g. aluminium sheet, three
inches square. The drilling details appear in Fig. 2.
The top set of guys were attached to the mast at a distance of
one foot from the top, and was achieved by drilling four holes
through the sides of the bamboo. After the guys had been
secured, these holes were sealed with several layers of PVC
adhesive tape.
At the top of the mast, a pulley unit was fixed by means of
steel galvanised wire, which was wrapped around the top of the
mast and through the pulley unit several times before
tightening and trimming the loose ends off; several layers of
tape were then applied. The open end of the top bamboo
section was also sealed with tape to restrict the ingress of
rainwater.
The whole length of mast was then fitted together and given
two liberal coats of aluminium paint to stave off the 'effects of
adverse weather. (One possibility here would have been to have
wrapped the entire length of the mast with wide PVC tape).
Whilst the paint was drying, the preparation of the guys was
undertaken; these were made from strong nylon cord which
was obtained for five pence per yard from a local supplier of
camping material. The lengths for each set of guys is given in
Table 1. A lanyard was also made from the same cord, and this
passed through the pulley at the top of the mast; a nylon aerial
insulator was then fastened to it, and the two ends of the
lanyard were tied together to form an endless loop.
Erecting the Mast
The completed mast, with all guys fitted and suitably tied to
the sides of the bamboo to prevent tangling, was then taken to
the site where it was to be erected. A piece of scrap timber,
about ten feet in length and some few inches square, was sunk
(Piece
of
timber used
to hold mast vertical
whilst guys are
i
tied off (later removed).
//iii/////1 //////
.l
Fig.4
GENERAL VIEW OF MAST
-
Pulley unit
Long wire
.,-Top
of
mast sealed
.,,,Pulley unit bound
and sealed
Top set of guys
through holes
in mast and sealed
/fixed
Lanyard`
Fig.3
TOP GUYS PULLEY UNIT & LANYARD DETAILS
into the ground at this point, to a depth of around four feet
this was to assist in holding the mast in the vertical position
whilst the guys were tied off. Four pieces of wood about four
feet long were hammered into the ground at distances of seven
feet from the base of this post; these were the guy anchoring
points and could have been made from metal, of course.
The base of the aerial mast was placed against the bottom of
the upright post, and starting at the pulley end of the mast, it
was lifted and gradually "walked up", whilst ensuring that
none of the guys got snagged on any objects. It was found to be
quite easily raised into the vertical position, and whilst holding
the mast to the post with one hand, two lengths of nylon cord
were wrapped around the post and mast at top and bottom to
hold the mast in position whilst the guys were secured. The top
set of guys were temporarily tied off, then the middle set
followed by the bottom set.
Lastly, the guys were tensioned up properly to keep the mast
in a vertical position, the post supporting it was removed and
the ends of the guys were wrapped up into neat bundles. The
longwire was then passed through the nylon insulator attached
to the lanyard, and hoisted into position.
December issue due to appear on Friday, November 28th.
578
THE SHORT WAVE MAGAZINE
VHF
150 squares, his confirmed tally now
standing at 154. His cards show a nice
BANDS
NORMAN FITCH, G3FPK
Awards News
TWO more
2m. VHF Century Club
certificates have been awarded this
month. No. 326 goes to Ernie
Phillipson, G3NVE from Goole, North
Humberside. He was first licensed in
1959 starting off on 160m. CW working
his way up to 70cm., although his
interest in radio goes back to schooldays
in 1934. Most of Ernie's 100 QSLs
confirm AM contacts in the late sixties,
early seventies, well before the FM and
SSB era. His Tx then was a home made
one using a QQV03-10 PA at 10 watts.
To keep in touch now, a Uniden 2030 is
used on FM mode, the aerial being an
8 -ele. Yagi in the vertical plane. Ernie
also operates on 70cm. using a home
made BAY 96 Varactor Tripler from
2m. An 18-ele. Parabeam at 40ft. is the
aerial while the Rx is a modified TV and
VHF/UHF tuner, used mainly for
receiving amateur TV signals.
Flemming Jul -Christensen, G8RMA,
from Eastbourne, E. Sussex, receives
certificate no. 327. He hails from
Denmark where his call is OZIEVA, but
has lived over here for 15 years. His
British call was issued in October 1978
since when he has been very active,
sending out about 1,500 cards. In
commón with many others, he finds the
QSL return rate appalling so has
resorted to the expensive method of
direct QSL-ing for new countries and
squares. All G8RMA's cards were for
non-U.K. contacts. The station
comprises a Trio TS -700S with Sentinel
PA giving 58 watts output, the aerial
being a Tonna crossed 9 -ele. Yagi. A
transverter 144/432 MHz enables 70cm.
to be used, the aerial being a crossed
19-ele. from Tonna. All the gear is
powered from a 25 Amp. regulated
P.S.U. Hemming is learning morse so
that he can get on the HF bands to works
some old friends.
On the QTH Squares Century Club
scene, Mike Lee, G3VYF, holder of
certificate no. 7, has got his sticker for
mixture of SSB and CW modes, and
Tropo., MS and E's contacts.
Frequent requests are received for
details of the Magazine's two
-
VHF/UHF awards the VHFCC and
QTHCC. An s.a.e. will bring full
details.
Oscar Topics
Following the loss of A-0-9, AMSAT
is now constructing two more Phase 3
satellites, labelled "B" and "C".
AMSAT-UK Secretary Ron Broadbent,
G3AAJ, met Dr. Karl Meinzer, DJ4ZC,
in London recently and learned that two
transponders are planned, one
operating in the 24cm. band. At the
Geneva Conference last year, the band
1.24-1.26 GHz was agreed for amateur
satellite services, but Ron was unaware
of whether an uplink or downlink is
planned for Phase 3B and 3C.
The next issue of Oscar News is at the
printers as this is being written and
should be in the mail to AMSAT
members as you read this. In response to
many requests, AMSAT-UK has
published a booklet entitled, The Best of
Oscar News, which is a self-explanatory
description of its contents. The colt is
£1.50 post included and it contains
essential reading for all newcomers to
satellite communication, as well as being
a most useful reference book for the old
hands. For full details of the activities,
publications and supplies of AMSATUK, drop a line to G3AAJ at 94
Herongate Road, London, E12 5EQ
enclosing an s.a.e.
Contest News
Brass pounders will be at it on 2m. on
Nov. 2 for the six hour CW contest
which starts at 1000GMT. This is a two
section affair for either single or multi operator stations with radial ring points
scoring. The Cray Valley RS has the 2m.
leg of its three activity contests on Nov.
16 from 1000 to 1300GMT. This event is
open to all amateur and s. w.l. 's and is an
all -mode contest. Usual RS(T) and serial
number exchanges plus administrative,
as distinct from postal, Aounties. Cray
Valley members will identify by the
letters "CV" and for working the club
stations G3RCV and G8FCV you can
claim 10 points. 3 pts. for working
members and 2 pts. for members
working each other; all other QSOs are
worth one point. Final score to be points
multiplied by total of counties plus
November, 1980
countries. CVRS members' logs to
G4DFI, 28 Garden Avenue,
Bexleyheath, Kent, DA7 4LF. Nonmembers' entries to Bob Treacher, 79
Granby Road, London, SE9 1EH, by
Dec. 14.
The 2m, Fixed contest is scheduled for
Dec. 7 from 0900-1700GMT. This is
another single or multi -operator one.
There are four sessions in the 432 and
1,296 MHz Cumulatives in November
on the 3rd, 11th, 19th and 27th. The
70cm. periods are 1900-2100 and the
23cm. ones, 2100-2300GMT. Scoring at
one point per kilometre from the best
three of the total of seven periods.
Repeater Notes
A new VHF
relay has been
commissioned, GB3WR on the Mendip
Hills, near Wells in Somerset. It is on
channel RO, which is 145.000MHz input
and 145.600MHz output, for the
uninitiated. Last month's comments on
illegal operation brought a long letter
from a reader giving details of the people
using the three cells mentioned. One of
them has now obtained an amateur
licence. Hopefully other pirates will
follow this lead.
VHF Convention
At long last, the RSGB has booked
what promises to be an ideal venue for
the popular, annual VHF Convention.
The 1981 event will be held at the
Sandown Park Racecourse, just north
of the A3 in Esher in Surrey. This is now
a fine, modern complex with some
10,000 square feet of exhibition area.
Consequently, there will be no need to
exclude the showing of VHF and UHF
complete transceivers, etc. Naturally,
being a racecourse, there is very ample
parking space. The date is the later one
of April 11, the weekend prior to Easter.
Gigahertz Bands
One of the best tropospheric lifts for
years occurred on October 3 and it is
certain that many "firsts" and new
records will have been established when
the final picture emerges. The ridge of
high pressure responsible produced
some excellent propagation from parts
of the U.K. into central and eastern
Europe. For example, the GB2RS News
Bulletin on Oct. 12 mentioned a new
record 13cib. band QSO between
stations in YK and HK QTH squares.
Dave Sellars, G3PBV, (Devon) did
not spend much time on 23cm. since it is
difficult for him to change over at
present. Consequently he missed out on
Volume XXXVIII
THE SHORT WAVE MAGAZINE
the Oct. 3 event but mentions that Bob
Short, G3GNR, (XK20g) and G3AUS
both worked into OK -land. On Sept. 26,
Dave gave Jack Readings, GU3KFT, his
first QSO on the band. Mike Hearsey,
G8ATK, (Surrey) has a home brewed
transverter on 23cm. being an amalgam
of designs and ideas from several
sources. It gives one watt output.
Between 2307 and 2343 on Oct. 3 he was
copying HB9AEN/P (DG13b); DK6AS
(FM44d); DD3KF (DK21b) and DC51V
(E103j) but could not raise any of them.
He mentions the appalling QSL return
from 23cm. portable stations.
Ray Cox, G8FMK, (Oxen.) has a very
respectable total of 25 counties and 3
countries on 23cm. and in his letter,
mentions the UHF contest on Oct. 4/5.
He found northern station workable
only with difficulty on the 4th and
inaudible on the 5th, but better, if
unstable, conditions to the south to east.
Best DX on 23cm. were G8SDS/P
(Dorset) and G3XDY/P (AM67f) in
Suffolk.
Tony Collett, G8GXE, (Bucks.) likes
the idea of a four band annual table with
23cms. added; more on this later. In the
Oct. 3 affair, he had only managed to
hear PAOEZ for about 30 seconds until
0012, when Tony worked OKIKIR/P at
S7 each way for the first QSO outside the
country. During the contest, 23 contacts
were made on the band, the best DX
being G8SDS/P at 157 km. Only 8
portables were worked. Pete Connors,
G8LEF, (Huddersfield) has finally
abandoned his aerial tower planning
appeal and has taken the other option
move! A new QTH still in ZN21d, has
been bought, 1,150ft. a.s.l. with half acre field attached. As the area already
has a few 100-200ft. masts, he does not
expect trouble this time.
Welcome to David Coupe, G8LZM,
who writes from Co. Cleveland,
pointing out that UHF activity is not
quite lacking there. John Thompson,
G3NWU, (Co. Durham) is QRV on
3cm. and 23cm. although work
commitments curtail his activity.
David's best DX on 23cm. so far is
SM6HYG at 827 km. which resulted in
RSGB Microwave Distance Award no.
20. His UHF set-up starts on 2m. with an
Icom IC -211E, feeding a SOTA
transverter giving 2 watts through lossy
UR67coax, to a 15 -over-15 Yagi at 30ft.
He has a pre -amp. at the mast head.
Another new correspondent is Pam
Rose, G8VRJ, (Lincs.) who operates on
2m. and 70cm. and hopes to get onto
23cm. next year.
-
579
THREE BAND ANNUAL VHF TABLE
January to December 1980
FOUR METRES.
Station
G4CMV
GD2HDZ
G4HNS
G8GXE
GJ4ICD
G3PBV
G8OPR
G3BW
G8TFI
GBVLQ
G8FMK
G4BYP
G8IFT
GBMFJ
G3FIJ
G8HHI
G4BWG
G4DEZ
GSKAX
C
G8VR
G4ARI
G3FPK
G3CO
G8KGF
G4ERX
G4FKI
GW3CBY
GM8TSI
G3KPU
G8RWG
G4HGT
G3EKP
G8TIN
G8VJJ
G8JJR
G8RZA
G8VFV
G8JGK
GM8MNG
GW3MHW
70 CENTIMETRES
TWO METRES
TOTAL
Counties
Countries
Counties
Countries
Counties
Countries
Points
50
6
54
38
43
12
214
6
72
60
59
65
64
56
65
72
59
67
62
49
20
45
41
7
9
170
169
53
14
151
42
42
17
51
8
149
148
147
7
141
11
132
132
128
128
122
119
118
115
104
-
-----
15
36
-----5
4
5
14
12
19
26
15
23
25
20
10
37
42
38
43
23
17
14
11
11
10
9
4
17
10
30
9
8
6
64
44
55
16
3
11
40
3
56
17
69
43
29
-
1
53
------
-
48
68
36
48
30
20
30
23
12
21
40
5
39
13
5
27
22
15
36
20
22
4
-----3
2
5
5
5
Hank Berg, SM6CEN, from Billdal,
used to operate from the famous, UHF
orientated, Chalmers Technical College
club station, SK6AB, but now writes
that he is only QRV from home. He says
that UHF activity is good on the west
coast with all squares, except GS, active.
On 13cm. the most active stations are
SM6FHZ (GQ); SM6ESG (GR) and
SM6HYG (FS). Hank tells of a beacon,
SK6UHG, on 1,296.925 MHz which
was commissioned on Aug. 1. The
output is 10 watts to a Big Wheel aerial.
Initially, this beacon was to operate
from the city of Gothenburg (FR30j)
then, after any problems have been
cured, it will be moved to a site in. the
Gothenburg Archipelago (FR28/29)
affording the possibility of sea ducting
to the U.K.
Claus Neie, DL7QY, who moved
from Berlin to Rudolfsberg in Bavaria
some while ago, is now up to 42 squares
worked on 23cm. from FJ61e. During
the tropo. opening of Sept. 2, when no
beacons were audible, he worked
G3PBV (YK32b); G4KBC (AL34a).
61
9
63
18
9
6
51
13
13
7
10
5
-28
8
19
11
8
35
13
-
-
6
1
.
98
8
93
1
91
91
4
6
9
17
18
6
9
14
39
--
8
14
10
58
6
31
11
13
5
9
--
9
11
53
33
50
28
43
45
41
8
7
5
2
6
---5
1
1
89
85
85
83
83
79
73
72
72
72
64
64
63
55
54
53
48
47
45
Seventy Centimeters
Brian Bower, G3COJ, (Bucks.) has
now got his 70cm. aerial up again in time
to work some new squares
BH, CH,
DG and YH in the Oct. 3 lift. G3PBV
found an opening on Sept. 29 when
some German, French and Dutch
stations were raised, all at good
strength. The next day, HB9F beacon,
(DG40c) on 432.984 MHz., was
pounding in. His contacts included
F1FNY (DG) who was very strong, and
HB9BPQ (G8BGQ) in Geneva. On Oct.
3, Dave's QSO5 included OK1KIR/P at
1,171 km., DL7QY (FJ); DC3ID/A
(EJ) and DF8FJ/P (FH). OK1AIY/P
(HK) and OE2CAL (GH) were coming
in well but he could not crack the pileup. The contest weekend was a bit of an
anit-climax, by contrast.
Mike Lee, G3VYF, (Essex) now leads
the square table on 70cm. and this
thanks to the Oct. 3 affair, his tally
including;
OE2CAL; DF3RU (FJ);
DKONA (FK); DL7HR (FI);
OK1KIR/P (;5K) and G3GNR (XK).
On Oct. 5, F9ZG/P (ZI) and F1AUB/P
-
-
-
580
(BD) were added. Clive Morton's,
G4CMV, (W. Yorks.) letter covers his
doings in September when, during the
contest weekend of the 6th and 7th, he
worked FIBYM (ZE). On the 26th.,
FICPX (AH) and F6CFJ (ZH) were
added. Ray Elliott, G4ERX, (Essex) has
not had much time to operate recently
but added DL7QY in FJ for square no.
45 on Oct. 3.
Dave Thorpe's, G4FKI, (Essex) 10
watts of SSB raised OKIKIR/P on Oct.
3 to boost his countries total on the
band. From St. Austell, (XK56by
Martin Blythe, G4HFO, now has a
Microwave Modules 50 watts PA unit
which, together with its receive pre -amp,
has greatly improved his capability on
the band. On Sept. 2, he contacted
LXIDB (DJ); HB9QQ (EH); HB9BPQ
(DG) and DL7QY. A welcome QSO
with GW8VHI (YL32f) gave Martin his
9th country.
G8ATK lists F, PA and DL QSOs on
Sept. 2 between 1755 and 2152, the best
being F1BUT (AD) and DKONA (FK).
The fine condition on Oct. 3 brought a
further criip of DX including DF8FJ/P
(FH); OE2CAL; DL7QY; DF3RU (FJ);
LXIDB and OKIKIR/P. A surprise
contact during the Sept. 6/7 contest was
with EI2DJ/P (WN) for G8FMK, while
the Oct. 3 affair saw QSOs with F1CYB
(BH) and F1BCS (BJ). In the UHF
contest on Oct. 4/5, Ray's best effort
was DL9GS (DL).
G8GXE also worked EI2DJ/P in
Dublin and later GM4BVE/P
(Dumfries & Galloway) in the Region 1
event. Tony noticed the very selective
ducting on Oct. 3. He spent most of the
time on 70cm. working DLs in DK, DJ
FH squares, OE2CAL,
OKIKIR/P, ON5FF and HB9AEN/P
and
(DG) who was S9 -plus -20 dB. at 2359.
LXIDB was a gotaway, unfortunately.
During the contest in the next couple of
days, he made 80 QSOs with assorted
DL, F, ON, PA and British stations.
John Hill, G8HUY, (Hayling Is.)
netted 11 countries and 34 squares
during 12 hours on Oct. 3. Best DX was
OE2CAL at 1520 whom he called again
later, at 1817, with GW8GKFin tow, for
the latter to work the 0E. John was
running just 6 watts output to a home
made 27 -ele. Q -L -Y at 15m. He
mentions that beacon
HB9F was
audible for four days before the lift but
there was no activity in that direction.
He reports that G8HND in Portsmouth
worked a Polish station in JM square
that evening.
Paul Broadhurst, G8LGL, (Avon)
THE SHORT WAVE MAGAZINE
QTH LOCATOR SQUARES TABLE
Station
03 POI
-- -- ----- -- --
cm. 70 cm.
23
DK3UZ
-
14EAT
G3IMV
G3CHN
G3VYF
EA3LL
25
82
G3SEK
G14ICD
9H1CD
G4ERG
G3FPK
9H1BT
GM4CXP
G8H VY
G4BWG
G4DEZ
G8GML
G8LGL
GJ8KNV
260
78
74
67
63
191
58
12
-
26
25
12
73
32
74
25
54
70
56
2
G8ATK
081X0
G4AWU
G3JXN
G8HHI
-
5
39
22
-
G8LHT
7
G8KG F
G2AXI
2
G8TFI
G4ERX
G3KPU
-
5
G6UW
-
00
98
20
95
93
93
92
54
43
45
25
91
141
166
139
185
105
144
115
149
136
142
116
90
94
12
89
87
87
84
84
41
83
136
40
83
82
123
82
7
79
79
86
86
78
76
87
78
76
74
74
71
76
116
102
117
GD2HDZ
G4HYD
-
-
7
9
G8KAX
GJ2RAX
02
01
5
8
-
02
39
3
51
G8TGM
161
128
207
146
175
205
172
07
07
06
05
04
1
G8JJR
G8KSP
215
81
7
G4GHA
G8JAG
II
161
132
227
148
106
128
-
G4JZF
II
174
160
159
157
227
166
169
111
G8KPL
G8VR
G8GXE
GM8NCM
12
21
19
167
10
23
33
55
36
62
1
59
57
56
54
40
36
30
29
28
22
190
22
-
4
9
60
182
11
40
1
G8LFJ
G8MFJ
G3OHC
G3PBV
G8OPR
G8LEF
G4FBK
268
200
80
3
24
96
86
13
13
G3CO1
298
252
263
230
196
80
11
298
252
238
230
85
82
I1
G3KEQ
0413E
G4CM V
GM4COK
G3BW
Total
15
16
G41GO
2. m.
2
90
143
96
10
40
27
36
114
14
G3FtJ
-
46
30
68
G81FT
68
27
68
25
67
62
29
28
61
112
95
92
62
95
88
67
80
57
116
57
50
33
2
I
G3SPJ
G4HFO
G18EWM
GBJGK
G4AEZ
5
G4GEE
-
G8RMA
G8VLQ
G4GxT
G8FMK
G4GSA
G8Rw'G
G8VFV
-13
Starting [late January
QSOs.
'Band of
7
22
49
58
56
54
6
51
1
.
60
60
--
50
33
1975. No satellite or repeater
the Month" 2m.
1,
caught FIDYD (XH) on Aug. 9 and on
Sept. 2, F2TU (DI) and DL7QY. Oct. 1
saw another new square from F1 FNY/P
in DG. On the 3rd, the afternoon period
produced F9NL (AD); F1CYB (BH)
and DFIVW (DJ) but OE2CAL could
not be raised. Some midnight oil
burning netted DC5IV (EI); DL7QY;
ON5FF and HB9AEN/P. G8LZM's
November, 1980
1980 tally is 41 counties, 11 countries
and 30 squares, David now has a very
sharp 88 -ele. Multibeam at 33ft. and
runs 50 watts to it from a Microwave
Modules 144 to 432 MHz transverter.
G8TFI (Middx.) is another 70cm.
operator using the 88 -ele. aerial. Chris's
station consists of an Icom IC -201, MM
tranverter and home made, 200 watts
amplifier. The period Sept. 30 to Oct. 4
produced some fine DX, the best on the
3rd including UF8FJ/P (FH); DL7QY;
OE2CAL and HB9AEN/P. Bob Lane,':
GSVLQ, (S. Yorks.) is another reader
who is now into double figures in
countries worked this year. In the late
evening of Sept. 26/27, he found a
restricted opening to France when he
worked FICPX (AH43d). On the 29th,
Bob at last worked fellow Yorkshireman
GJ4ICD. The RSGB Region contest
weekend gave him 4 new squares and a
couple of countries, plus two contacts in
poor radio directions.
Ken Willis, G8VR, (Kent) has made a
few contacts on the band using an MM
transverter driven from a Yaesu FT -200,
but at present there is no room on the
mast for a decent antenna. Reg
Woolley, GW8VHI, (W. Glam.) has a
Trio TS -770E and MM 50 watts
amplifier with a crossed 12 -ele. Yagi. He
is one of our younger contributors, aged
18, but has already worked some nice
distances, viz;
FIBUU (ZE); F6ETI
(YH) and EI9Q (WM).
From Jersey, Geoff Brown, GJ4ICD,
says the GJ8KNV QSO with SM7 on
Sept. 2, mentioned last month, was a
first. He also claims other firsts from the
Channel Islands, such as GU8FBO to
OE2CAL; GJ4ICD to the same station
and to OKIKIR/P; GJ4JWA to GI.
Geoff has provided a copy of his
complete entry for the UHF contest on
Oct. 4/5 when he operated as a single op. station on 70cm. only. It provided
the 17th country on the band, a
remarkable achievement. He completed
106 QSOs for a claimed score of 33,345
points, with EA3AIR/P (BC44c) the
best DX at 836 km. Conditions were
very poor to the north, but very good to
the south through east which accounts
for the average DX per QSO of 314 km.
The output power was 390 watts PEP
measured on a Bird Digital PEP Meter,
the aerial being a single, 21 -ele. F9FT
Yagi at 35ft. An NEC 64535 masthead
pre -amp. was used ahead of the TS -770.
Ina letter to Geoff, PEICIO tells that
he hopes to be QRV from XH, XI, YG
and YH squares on 70cm. in November,
with PEOJOK. DL7QY now has one
1
-
Volume XXXVIII
kilowatt of RF into four, 21 -ele. Yagis
and, up to Sept. 11, had worked 89
squares from FJ Claus lists 16 U.K. and
Channel Is. stations worked on Sept. 2.
SM6CEN writes that towards the end
of the 1970s, some Scandinavian radio
amateurs became very active on 70cm.
during Aurorae with most activity
around 432.050 MHz. Hank mentions
that Doppler shift is greater than on 2m.
so one should tune around for replies.
He reckons a Tx output of 50 watts to a
good, gainy aerial is necessary but adds
that, from SK6AB, they have worked
stations up to 650 km. distance with 10
watts. Although QRBs of 400 to 600 km.
are common, those over 1,000 km. are
rare. From his FR40b QTH, during the
Ar of July 26/27, at around midnight
GMT, Hank copied DF3XU (FN);
SK6AB (FR); SMODYE (JT), OH3TH
(LV) and DF6NA/OHO (JU). It would
seem to your scribe, however, that one
would need much more e.r.p. and a very
sensitive, low noise Rx to achieve much
success on 70cm. Ar from the more
southerly latitudes in the U.K., although
it has been done, of course.
Two Metres
In the space left, it is impossible to
provide detailed, individual coverage of
the tremendous amount of DX worked
by so many readers. From Devon, Roger
Thorn, G3CHN, did very well on Sept.
30, working 10 DLs, 15 Fs, 15 HB9s and
5 Italians
IW1AHH (DF); I2AV,
I4BXN and I2DAT (all EF) and I2PAG
(FF64d). In the Oct. 3 fun, 59 DLs, 5
Y2s, 9 Fs, 2 HBs, 7 OZs, 9 PAs, 7 OKs
and I and OE were worked. Only
G3COJ mentions the Ar on Oct. 4 from
1640, resulting in QSOs with SM4GGC
(FT80c) QTF 340° and GM3ZXE (YQ)
with several GMs heard at 0° QTF.
G3PBV did well in the Sept. 6/7
contest making 111 QSOs. Best DX were
-
EA3JA/P (BC) and FOGBY/P
(G8DDW) in BC. Dave worked 3 EAs
and 50 Fs. Pick of the bunch from
G3VYF on Oct. 3 were OK1QI/P
(IK77h); OK2BFH/P (JJ33g);
OK2UAS (II55e); OK2LE (II24b) and
HG1KYY (IH53a). G4CHV made
several long haul QSOs in the "Trophy"
contest such as F6EVA/P (AC);
EA2HO (ZD); F1BUT (AD) and
DF8FA/P (FH). G4ERX has added 17
new squares from Sept. 6 with EA, F,
OK and Y2 stations listed.
G4FKI reports an SM/Aeronautical
Mobile en route from GJ to SM on FM
channel S20, causing an enormous pileup. G4HFO's best efforts on Oct. 3 were
THE SHORT WAVE MAGAZINE
OE2CAL and OE5XPL. Ken Osborne,
G41GO, (Bristol) aptly sums up the
period Sept. 2 to Oct. 4 in that overworked adjective, "fantastic!" He
reckons the Oct. 3 affair to have been the
best lift ever heard in that 25 squares
were worked. His long list includes, 0E,
OZ, OK, Y2/3 and many DLs.
Graham Taylor is now G4JZF and is
doing well from his 650ft. a.s.l.
Cannock (Staffs.) QTH. He runs an
Icom IC-245E/Mirageamplifier/16-ele.
Tonna at 36ft. set-up and is ex-G8SZF.
He lists some fine DX worked on Sept.
2, 6/7 and Oct. 2 and 3. G8ATK is
another well -sited station who did very
well in the Sept. 2 event with 8 HB9s, a
couple of Y2s and many DLs worked,
plus HBOLL mentioned last time. Mike
describes the Sept. 6/7 contest as, "..
full of crud!" but he did work EA2EI/P
and EA2HO, both in ZD, on the 7th.
The tally on Oct. 3 includes 6 OEs, 4
HB9s and more DLs.
G8FMK finally worked HB9QQ
(EH) when Peter sensibly decided to
operate split frequency. This idea is
worthy of serious consideration when a
DX station is being called by perhaps
hundreds of anxious operators. The
Sept. contests gave Ray his first EA QSO
with EA2EI/P and that station was
worked, too, by G8GXE, along with
assorted, distant HB9s, Fs and DLs. On
Oct. 3, little time was spent on the band,
with just OE and OK added.
Chris Baker, G8JGK, (Essex) found it
difficult to work any real DX on Sept. 2
as the ducting was over his head
apparently. He had 74 QSOs in the Sept.
6/7 contest including 2 HB9s. On Oct. 3,
Y24TN (GK); OK1MBS (HK);
OK1KIR/P and DD1SA (EI). DD3PF
(EJ) was another new square. Jon Stow,
G8LFJ, is another Essex chap who lists
many DX stations worked on Sept. 2,
6/7 and Oct. 3 including SM7, HB9,
EA, OE and OZ, plus the usual DLs and
Fs.
The following stations also participated in some or all of the previously
mentioned openings and are thanked for
their reports:- John Cleaton, G4GHA,
(Dorset); John Wilkinson, G4HGT,
(Leeds); Paul Broadhurst, G8LGL,
(Avon); George Gullis, G8MFJ (Wilts.);
Andy Markham, G8RZA, (Essex);
Chris, G8TFI, (Middx.); Roger
Gregory, G8TIN, (Oxon.); Neil Clarke,
G8VFV, (W. Yorks.); Bob Lane,
G8VLQ, (S. Yorks.); Ken Willis,
G8VR, (Kent); Arthur Breese,
GD2HDZ, and Richard Pope,
GW8TVX, (W. Glam.).
581
Geoff Brown, GJ4ICD, participated
"Trophy" contest on Sept.
6/7 and made 648 QSOs which he thinks
might be a record for a single -op.
station. His final points-per-km. total
was 242,022, or 9600-plus on the radial
ring system. A notable catch in the Oct.
3 affair was Y22SA in the rare GN
square.
Mick Allmark, (Leeds) has continued
his s.w.l. activities and heard some
interesting DX on Sept. 2. He was out
with G3XNO/P for the Sept. 6/7 event
and on Oct. 3, G8MJD and G4HGT
operated -/A from his QTH, working a
lot of the DX.
in the RSGB
Four Metres
G8VR is erecting a new 4m. aerial to
replace the temporary indoor dipole.
His gear comprises a "Nostalgia Four"
home brewed Tx, using three 6AJ5
valves in a local oscillator chain, an
832A mixer, driving a 6146 PA. A 3 -ele.
aerial at 25ft. is contemplated but, if he
gets really hooked, Ken may launch a
4 -over-4 by next spring.
John Baker, GW3MHW, (Dyfed) has
mentioned a calisign error in the
September piece; the Austrian station's
call should have been OE8NTK. On the
80m. net
3,718 kHz
GM3WOJ
says he has donated his SSB transverter
and PSU to ZB2BL. It is in the custody
of the RSGB awaiting a suitable
opportunity for it to be taken to
-
-
Gibraltar. John wonders if anyone
would be prepared to donate a QQV0640A valve as a spare for the PA? There is
talk of a 4m. beacon for Scotland. It
seems the Tx is available but some
decent feeder, an aerial and site are now
sought. The latter at GB3ANG? John
advises that G3LZN (Warwick) is back
on 4m. after 20 years and, via G8VN,
that G3NRW is testing on the band.
Deadlines
Another most rewarding period.
Your reports are all read with keen
interest, particularly those that are
thoughtfully broken down into bands
rather than a chronological account
jumping from band -to -band. Your
ideas about a four band annual table for
1981, including 23cm., would be
appreciated. e.g. participants to choose
any three enabling the G8s to avoid the
present handicap. All your news for the
December issue by Nov. 5, and for the
January one by Dec. 3rd. Everything to:
"VHF Bands,"
SHORT
WAVE
High Street, Welwyn,
Herts., AL6 9EQ. 73 de G3FPK.
MAGAZINE, 34
582
THE SHORT WAVE MAGAZINE
November, 1980
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TR9000
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1
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XXXVIII
CABLE
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UR43
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£6.55
£0.75
£11.50
Basemount standard
Ball type Basemount
Coils for Flexiwhip
Base thread adaptor USA/G Whip
Extendarod 40"
(299.00
£199.00
R517 Hand Held Tunable 11 s 144MHz
plus Crystal Control on three Fixed
Frequencies.
UNDER £50inc. VAT
455kHz FM DISCRIMINATOR AMPLIFIER. Limiting
threshold 100uV. Amplitude modulation rejection
40d8. Audio output voltage at 1 kHz 20-300mV
Price £5.00'
frequency deviation ± 3 kHz
SECONDHAND EQUIPMENT
We have a very rapid change over of secondhand
equipment, especially in receivers. Our lists are
updated each day, please send SAE for latest or
telephone. Here are a few of the items from our range.
All prices include VAT.
DRAKÉ
£ 1035.00
TR7 Digital Transceiver
PS7 Power supply
RV7 Remote VFO
MS7 Speaker
R7 Digital Receiver
Filters for TR7
FA7 Fan for TR7
MN 7 ATU/RF Meter 250 Watts
£207.00
£138.00
£29.90
£989.00
£39.10
£20.70
£124.20
£207.00
MN2700ATU 2KW
DL300 Dummy Load 300watts
Drake TR4C HF Transceiver MS4S Speaker/
£395.00
power supply
£450.00.
Swan 100MX Transceiver + AC PSU..
Drake TR4CW Transceiver No4SpeakerPSU £466.00
£500.00
Trio R820 Receiver
£ 165.00
KW 202 Receiver
£1,500.00
Racal RA 1218 Receiver
£400.00
Drake R4C + CW Filter
£190.00
FR50B RX-FL506 TX-VFO
£575.00
Trio TS1805 Transceiver
£20.70
£37.95
£18.40
DL1000Dummy Load 1 KW
TV3300 Low Pass Filter
AK75, Doublett Antenna 132' top with 470
£23.00
ohm Feeder
-
MICROWAVE MODULES
F.D.K.
Price £50.00
88 MHz
118 - 136 MHz
144 - 148 MHz
148 - 174 MHz
420 - 450 MHz
Diawa 144 Mhz and 70 cros Antennas in stock
Multi-76CE Transceiver
Multi-700EX Transceiver
AR20. 12 channel FM receiver 144-146 MHz. Input
impedance 50-75 ohm. AM -FM modes. Sensitivity
0.2uV AF output 3 watts. 12v DC operation
BEARCAT 220 FB
£8.50
£8.00
£ 13.00
£3.50
£3.15
MMT1296/144 1296 MHz
Lin/Transverter
M MT70/ 144 4m Lin/Transverter
MMA 1296 Receiver pre -amp
MML144/4040 watt Linear Amplifier
MMA144V 2m RF Switched preamplifier
MM L432/20 Lin Amp and Pre -amp
MMT 144/ 28 2m Transverter
MMT432/28S 70cm Transverter
MMT432/ 144R 70cm Transverter
MMT70/ 144 4m Transverter
MML144/25 2m 25 watt Linear
MML144/ 1002m 100watt Linear
MMC70/28 4m Converter
MMC144/28L0 2m Converter
MMC432/28S 70cm Converter
MMC 1296/ 144 23cm Converter
MM D050/500 500 MHz freq. conter ...
.
ANTENNA RANGE
HG5 Vertical 10-80rn
HFR Ground Plane Kit
GDX-2 Discone 50-480MHz
-
£ 18400
£115.00
£29.90
£69.00
f29.90
SOLID STATE STABILISED POWER SUPPLIES
Maximum ratings quoted. Prices include postage.
Model 122 12.6V 2.5A
Model 12510-15V 5amp
Model. 156S4 -15V Eamp Twin Meter
Model 1210S 4-20V 10 amp Twin Meter
Model 1210/t 1Cemp 13v
Model 1220/1 13.5V 20 amp
Model 1220/2 13.5V 12 amp
Telephone (0942) 676790
-
LEICESTER EXHIBITION
£40.00
£85.00
feisty
£90.00
£80.00
£89.00
£99.00
£ 136.85
£173.65
£ 115.00
£4830
£14260
£2490
£26.90
£29.90
£32.20
£69.00
£48.50
£28.00
39.50
Mod. 1210 S
STEPHENS-JAMES
ROAD, LEIGH, LANCS. WN7 3EA
47 WARRINGTON
£15.55
£29.50
- November 6 -7-8th,
LTD
5ARClA1CARD
e221
November, 1980
THE SHORT WAVE MAGAZINE
584
RADIO SHACK LTD fo
R.L. DRAKE PRODUCTS
inc. vat
TR-7/DR-7
PS -7
PS -75
RV -7
MS-7
R-7/DR-7
SI -300.
SL -503
SI -1800
SL -4000
SI -6000
AUX-7
RRM-7
RTM-7
Transceiver/Gen. coy. Receiver. Digital
Power Supply 120/240v for TR -7
Sideband Duty P.S.U. for TR -71201240v
Remote V.F.O. for TR -7
Matching Speaker for TR -7 and R-7
Digital Receiver 030 MHz
CW Filter for TR -7 and R-7(300Hz)
CW Filter for TR-7and R-7(500 Hz)
SSB/RTTY Filter for TR -71R-7 (1800 Hz)
AM Filter for R-7 Receiver14000Hz)
AM FilterforTR-7 and R-716000Hzl
Range Prog. board and 1 Receiver module
Range receiver modules for Aux -7150010-1z) .
Rangetcve. modules for Aux-71500KHzl....
1035.(X)
NB -7
NB -7A
FA -7
Noise Blanker for TR -7
Noise Blanker for R-7 Receiver
Fan for TR -7 and PS -7
Mobile mounting kit for TR -7
ATU/RF Wattmeter. 160-10m (250w)
ATU/RF Wattmeter 160.10w (2 kw)
RF Wattmeter/VSWR Bridge (HE)
Service Manual for TR -7
Service Manual for R-7
TR -7 Service Kit
Linear Amp. 2kw. 10m -160n. Without Tubes.
66.24
66.24
20.70
34.50
124.20
-
MMK-7
MN-7
MN-2703
WH -7
385-0004
385-005
7037
L -7E
Tubes forL-7E12 x 3-50021
Transceiver AM/SSB/CW with R T.
120/240v Power Supply for TR-4CW
Plug-in Noise Blanker for TR-4CW
DC Power Supply for TR-4CW
Remote V.F.O. for TR-4CW
Crystal Control for TR-4CW
Speaker for TR-4CW; R-4C; SPR-4
Low Pass Filter 100w
Low Pass Filter 2kw
Hand Microphone for TR -7
Desk Microphone forTR-7
Dummy Load. 300w
Dummy Load. 1000w
Remote control ant. switch. 5 way (4linel
Remote control ant. switch. 5way (7linel
Balun for MN -7 and MN -2700. 4:1
Encoder Microphone
2m Amplifier. 1w in -10w output
.RF Wattmeter 20-203 MHz
Programmeable gen. purpose Receiver
DC Power Cord for SPR-4
For R -4C. .25/.5/1.5/4.0/60 kHz. each
Spare Operating Manuals
Accessory Crystals for R -4C and SPR-4
R-7/TR-7 connecting cable
Multiband Antenna
Antenna Insulator Kit
Receiver Projector
TR-4CWIRIT)
AC-4
34-PNB
DC-4
RV -4C
MS -4
TV-42LP
TV -33001-P
7073
7077
DL-300
DL-1000
RCS -4
CS -7
8-1000
1525 -EM
AA -10
WV -4
SPR-4
DC-PC
FL Filters
Manuals
Crystals
Interface
AK-75
AA -75
RP-700
SP-76
Speech Processor
13225
29.90
989.00
39.10
39.10
39.10
39.10
39.10
32.20
5.75
575
0.50
0.50
a 50
0.50
1.03
0.50
0.50
1.00
1.00
2.03
200
138.00
109.25
39.10
29.50
2.00
20700
59.80
18.50
18.50
37.95
759.00
136.00
109.25
73.60
1035
18.40
18.40
29.90
....
....
can.
5.00
5.00
5.00
2.00
2.03
5.00
0.50
5.03
5.03
2.00
2.00
2.03
1.03
10.00
5.03
5.03
5.03
1.03
5.03
5.00
1.03
496.60
I
FF.1
207.00
138.00
20.70
37.95
8280
11500
20.70
3680
46.00
69.00
460.00
4.60
39.10
6.00
1.00
1.50
1.03
2.00
1.00
2.03
5.00
5.00
1.00
1.00
1.03
2.00
503
0.50
0.50
1.00
644
0.50
20.70
23.00
2.30
69.00
79.35
1.03
2.00
0.50
1.03
2.00
Keyer Paddle (Black base)
Keyer Paddle (Chrome base)
Keyer Paddle (Gold plated)
Balun 3.5 30 MHz for dipoles
Balun 1430 MHz for beam antennas
ZA-1
ZA-2
2875
13.80
2.00
2.00
2.00
1.00
1.03
1897.50
10.03
124.20
500
86.25
2.00
1.00
1.03
1.03
1.03
37.75
9200
12.65
Optional Morse for DS -2000
KSR version 3.X
KSR version 2.X
ASR super deluxe
Demod./Keyer/Scope
Demod./Keyer
V.D.U. Baudot
Demod. keyboard with memory
ST -6000
ST.5000
RVD-1005
DKB-2010
Amateur HF Transceiver
KWM-380OPTIONS
AC-3801
Noise Blanker
AC-3802
Speech Processor
AC-3803
Control Interface
AC-3810.
CW Filter. 500 HZ
AC -3811
CW Filter. 250 HZ
AC-3812
RTTY Filter. 1.7 kHZ
AM Filter. 6.0 kHZ
AC-3813
-
6210
6210
62.10
62.10
KWM-350 ACCESSORIES
AC-2801
AC-2808
AC -2821
MM -280
MM -281
SM-280
SM -281
AC-2827
AC -2828
AC -2829
AC -2830
-
Rack Mount
Blower Kit
DC Standby Power Cable
Handheld Microphone
Handheld Noise cancelling Mic
Desk Top Microphone
Desk Top Noise cancelling Mic
CW Key
Microphone Foot Switch
Headphones
Lightweight Headphones
KWM-380 BOOKS
Owners Manual
NTN
Service Manual
NTN
86.25
12420
34.50
23.00
28.75
4830
54.0.5
18.40
23.00
41.40
23.00
ZOO
2.03
2.03
203
2.00
2.00
2.00
2.03
2.00
2.03
2.00
400
1.0D
2.00
500
5,00
500
5.00
5.00
Argonaut. 5w. SSB/CW. 3.530MHz
Triton IV 200w, SSB/CW. 3.5-30 MHz
Triton IV as above with Digital readout
Omni -A. Analog. Series B.SSB/CW. 1.8-30MHz
Omni -D. Dig. Series B. SSB/CW. 1.8-30MHz
Century 21. CW only. 3.5-29MHz
Century 21. Dig. 70w. CW. 35-29MHz
Delta Digital. 200w. SSB/CW. 9Bands
276.00
437.03
115/230 vac. 13vdc. 1A. for Argonaut
115/230 vac. 13vdc. 18A. for Omni
230vac. 13vdc. 18A. deluxe with VOX (Triton)
230vac. for Delta tcvr.
27.60
89.70
101.20
203
92.00
5.00
1986
5.75
5.75
2.00
2.03
0.50
0.50
2.00
1,00
1.03
2.03
1.03
5.00
5.00
5.03
2.03
2.03
1.00
1.00
1.03
2.00
1.00
1.00
5520
2.03
.
570E
574E
58)
546.25.
598.00
701.50
230.00
299.00
552.00
5.03
5.00
5.00
5.00
5.00
5,03
500
5.00
POWER SUPPLIES
210/E
252M0/E
262M/E
280
.......
.
5.00
500
ACCESSORIES
2064
208A
212
213
215P
217
218
240
241
242
243
244
245
247
248
249
276
277
1140
1170
KEYERS
645
670
KR -5A
KR -50
Crystal Calibrator
CW Filter for Argonaut
29.029.5 Crystal for Models 5401544
29.56.30 MHz Crystal for models 540/544.
Microphone, ceramic, with plug
500Hz 8pole Ladder Filter
1.8 KHz 8 pole Ladder Filter
160rn Converter for Models 540'544..
...
2990
3.45
3.45
18.40
36.80
3680
.
Crystal Oscillator for Models 540/544
Remote V.F.O. for Models 540/544
Remote V.F.O. for Models 545/546
Dig. Display/Counter for Models 540/544..
CW Filter for Models 540/544
Antenna Tuner
Noise Blanker for Models 545/548.........
Noise Blanker for Models 540/544
Crystal Calibrator for Model 570E
Ant. tuner/VSWR Bridge for Century 21
DC Circuit Breaker for 540/5441545/546
DC Circuit Breaker for Century 21
.........
Ultramatic, dual paddle for 545/546
Single-paddle keyer for 570/574
Single-paddle keyer. 6-14 vdc
Ultramatic, dual paddle. 117 vac/614 vdc
69.00
23.00
11270
87.40
124.20
17.25
43.70
32.30
18.40
1686
57.50
18.86
...
25.30
69.00
203
200
2.00
AVANTI ANTENNAS
AH1503H
AH450-50
AH450-3G
AH2695
AV -200
AV -241
2m on-glass mount antenna
2m magnetic mount antenna 13d61
/Um on -glass mount antenna
1978
70cm on -glass mount antenna 13d61
1On dual polarity base antenna
27 MHz on -glass mount antenna
27 MHz magnetic mount antenna
19.78
79.35
5.00
5.00
17.25
2.03
5.00
89.70
2.00
2.00
24,95
21.85
2530
500
5W
5.03
VIBROPLEX
Presentation
Original
Original
Lightning
Lightning
Champion
Vibro-Keyer
Vibro-Keyer
Super deluxe
Deluxe
Standard
Deluxe
Standard
5980
46.00
59.80
4800
43.70
Deluxe
59.80
Standard
48.00
2.1X1
200
2.00
2.03
2.00
2.00
BEARCAT SCANNING RECEIVERS
BC -210
BC -220
BC -250
184.00
25875
258.75
5.03
5.00
5.03
TELEX COMMUNICATIONS INC.
HFC-91
HMC-2
HTC-2
Underchin headphones
Underchin headphones
Twin Receiver headphones
CM -610
CM -1210
CM-1320
3.2-20 ohms. high impedance
32-20 ohms. high impedance mic.
3.2-20 ohms. high impedance mic,
CM-13206
20.00
can.
5.00
5.03
5.00
5.03
TEN -TEC EQUIPMENT
TRANSCEIVERS
515
540
544
545
546
COLLINS EQUIPMENT
KWM-380
inc. vat
322,00
98.90
920.90
875.00
1536.40
414.00
207.00
230.00
253.03
KSR
DS -3000
OS -3000
DS -3100
AH151-30
BENCHER PRODUCTS
BY -1
BY -2
BY -3
HAL COMMUNICATIONS
DS-2000
6.21
-
9.20
14.72
1.00
1.00
1.03
BOOM MICROPHONE HEADSETS
mic...........
3.2-20 ohms. Single headphone
DUAL MUFF HEADPHONES
C-610
Dual Receiver magnetic
29.90
39.10
36,80
2.00
2.00
2.00
2.00
6.90
2.03
4830
Volume
XXXVIII
THE SHORT WAVE MAGAZINE
585
RADIO SHACK LTD for Rockwell -Collins
£ 1897.50 inc. VAT
Pro-MarkTM KWM-380 transceiver
Rockwell-Collins-a tradition of excellence
SPECIFICATIONS
FREQUENCY RANGE: Tunable in 10Hz
steps.
RECEIVE MODE: 1.6-30.0 MHz, 0.5 to
1.6 MHz at reduced sensitivity.
TRANSMIT MODE: SSB or CW 160-thru
10 metre amateur bands.
* HF -380 1.6 to 30MHz.
MODE: SSB (voice and RTTY, either
sideband selectable), CW, or AM
(receive only).
POWER REQUIREMENTS: 105, 115,
125, 210, 220, 230, 240, 250, ±5% Vac
(Internal strapping option) 50-60 Hz
12 V to 15V dc (Connector strapping).
120W input in receive max; 600W input
in transmit max.
FREQUENCYACCURACY: Accurate to
within ±5 Hz when the 39.6 MHz
oscillator and the 455.0MHz oscillator
are set within ±3 Hz. Warm-up time is
10 min.
FREQUENCY STABILITY: Stability is
within ±150 Hz over the temperature
range of 0-50°C.
*HF-380 is within ±20 Hz over the
temperature range.
TRANSMIT PERFORMANCE:
OUTPUT IMPEDANCE: 50 ohms
nominal.
POWER OUTPUT: 100W PEP nominal
from 1.6-30MHz. In CW or RTTY, there
is
10 seconds, 50% duty cycle, key down
15 minutes max.
With the optional blower kit, power is
100W average, 50% duty cycle, key
down 1 hour max at 25°C, Yz hour max.
at 50°C for all modes.
UNWANTED SIGNAL SUPPRESSION:
(minimum values below output)
Carrier suppression
50dB
Undesired sideband, 1 kHz ref
55dB
Harmonics (all)
40dB
Mixer products
55dB
THIRD ORDER DISTORTION: 25 dB
below each tone of a two tone test.
AUDIO INPUTS: Microphone-low
impedance type, internal strap for HI-Z.
Line 600 ohm input unbalanced
impedance; level of 40 mV sufficient to
produce full output.
AUDIO FREQUENCY RESPONSE: Not
more than 5 dB variation from 300 to
2400 Hz.
RECEIVER RESPONSE:
ANTENNA IMPEDANCE: 50 ohms.
SENSITIVITY: Not more than 0.5 uV for
10 dB
S+N
at antenna input for SSB
N
and CW, 2.Oto 30MHz. Broadcast band
attenuation is a nominal 30 dB.
automatic turndown to 50W after
SELECTIVITY: In operating modes of
USB, LSB, CW, and AM.
BW
at-3dB
BW at-60dB
max)
Imin)
2.1 kHz
"1.7kHz
"360 Hz
' 140Hz
"6.0kHz
8kHz
4.4kHz
3.4 kHz
1.25 kHz
6C0Hz
25 kHz
50 kHz
"optional
IF AND IMAGE REJECTION: Greater
than 60dB.
AUDIO OUTPUT: Not less than 3.5W
into 4 ohm load at 1 kHz, at not more
than 10% total harmonic distortion. Line
audio output, -10 dBm nominal into
600 ohms.
AUDIO FREQUENCY RESPONSE: Not
more than 5 dB variation from 300 to
2400 Hz.
AGC: Audio output variance not more
than 8 dB as the RF input varies from 2.0
uV to 100 mV open circuit.
INTERMODULATION DISTORTION:
Two signals spaced 20 kHz at a level of
-10 dBm each will produce IMD down
50dB min.
SIZE: 15.50" (39.4 cm) W, 6.5" 116.5
cm) H (w/o feet), 7.5" (19.1 cm) H
(w/feet), 18.00" (45.7 cm) D.
WEIGHT: 501bs (22.7 kg).
Specifications subject to change
without notice.
20p stamps for details please
ACCESS
ANIL
DRAKE
*
SALES
*
BARCLAYCARD
SERVICE
RADO
SHACK LTD.
188 BROIDHURST GARDENS, LONDON NW6 3AY
Giro Account No. 588 7151
Telephone: 01-624 7174
Cables: Radio Shack, NW 6
Telex: 23718
586
THE SHORT WAVE MAGAZINE
Rlvl .
PROFESSIONAL
ELECTRONIC
COMPLETE CRYSTAL SERVICE
SERVICES
AMATEUR
Prices shown exclude VAT - UK Customers please add 15%.
70 CM CRYSTALS
TWO METRE CRYSTALS
Due to the much higher multiplication involved (3 times that on 2m) all our
stock 70cm crystals are to much higher tolerances than our standard range.
We are stocking the following channels: RBO 1434.6)'433.00), RB2
(434.65433.05), RB4 (434.70'433.101, RB6 (434.75/433.151, SU8 (433.201,
RB10 (434.85/433.25), RB11 (434.875/433.2751, 8913 (434.925/433.325),
RB14 (434,95/433.35), SU18 (433.45), SU20 (433.501
TX 8 RX for use
with: PYE UHF Westminster (W 15U). UHF. Cambridge (U 10B), Pocketf one
(PF1) AND UHF PF70 Range, and STORNO CQUCQM 662 as at £232 For
the U450L Base Stn we have the TX crystals for the above channels. The RX
crystals for the U451í Base Stn together with TX and RX crystals for any
other 70cm channel (eg RB/SU12 (434.9)'433.32 RTTY, SU16 (43340,
SU22 (433.55) etc.) for most UHF equipments are available at E4.48 for
crystals up to 63MHz, and £5.16 for 63to 105MHz to amateur spec or £5.26
for up to 133MHz and £606 for 63 to 105MHz to the same closer spec as our
-
-
stock items. Delivery approx. 5/6 weeks.
CRYSTAL
FREQUENCY
RANGE
USE (Tx or Rx)
and HOLDER
OUTPUT
FREQUENCY
144.4 (433.21
144.480
144.800
145.g00/ROT
14
25/R1T
145.050/R2T
145.075/R3T
145.100/R4T
145.125/R5T
145.150/R6T
145.175/R7T
145.200/R8T
.
CRYSTALS MANUFACTURED TO ORDER
Prices shown are for one off, to our amateur spec., closer tolerances
are
available, please send us details of your requirements.
A Low frequency fundamentals In HC13/U or HCSIU
Adj. tol. s50ppm. Temp.tot.±100ppmOto + 70°C.
B High
£28,12 60to99.999kHz
£17.74 100to 159,99kHz
£12.40 160to499,99kHz
500to 799.99kHz
£10.06
£9.25
£6.19
£7.30
frequency fundamentals/overtones Yt HCB/U, HC18fU or HC25/U
Adj. tul. -_2Cppm. Temp. toi. 330ppm loto 60°C.
-
8Wto9W.9kHz(fund)..
1.Oto1.499MHz(fuid)
'{1.5to2599MHz(fund)
'j2.6to20.99MHz(fund)
$3.4to3.999MHz(fund)
$4.Oto 5.999MHz (fund)
6.Oto20.99MHz(fund)
.
.
.
.
.
.
£9.75 '21to24,99MHz(fund)
£10.36 25to 30MHz
£493
£448
£6.21
£4,93
£4.48
15to8299MHz(3OMT)
60to105MHz)5O/T)
105to125MHz(50/T1
125to 190MHz (0/T)
180to25MHz(O/T)
.
...
,
..
.
£6.73
£8.28
£4.48
£6.16
£7.76
£7.60
£12.49
Delivery Normally 5/6 weeks (express available), all other frequencies 7/8
weeks. Holders: Low frequencies HC 13/U or HC 6/U dependent on
frequency. High frequencies are available in HC 6/U, NC 18/U or HC 25/U
unless marked f only available in HC 6/U or only available
in HC 18/U and HC
$
25/U, NC 17/U (replacement for FT 2431 and HC 33/U (wire end HC
6/U)
available as per HC 6/U above at 30p extra on NC 6/U price. Unless otherwise
specified, fundamentals will be supplied to 30pf circuit conditions and
overtones to series resonance.
CRYSTALS FOR PROFESSIONAL USE
We can supply crystals to most commercial and MIL specifications, with an
express service for that urgent order. Also for commercial use, eg TV or
computer crystals, etc, we can supply at very competitive prices. Please
send S.A.E. for details or telephone between 4.307pm and ask for Mr.
Norcliffe.
EXPRESS SERVICES
Many types made to order crystals are available on our EXPRESS
SERVICE with a delivery of three days on our class "A" service.
Telephone or Telex for details.
TERMS: CASH WITH ORDER -MAIL ORDER ONLY-S.A.E. WITH ALL
ENQUIRIES -PRICES INCLUDE P.&P. (BRITISH ISLES) EXCEPT WHERE
STATED -OVERSEAS CHARGED AT COST.
z
v
145.300/S12
145.350/S14
145.400/516
145.425/S17
145,450/518
145.475/S19
145.500/S20
145.525/$21
145.550/S22
145.575/S23
145.800/ROR
145.625/R1R
145.650/R2R
145.675/R3R
145.700/R4R
145,725/R5R
145.750/R6R
145.775/R7R
145.800/R8R
145.9501S38
7 >
a 3
3
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Ú Ú Ú
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e
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c
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e
b
e
e
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e
e
e
ce
ce
ce
b
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e
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14.50
6.0to19.999kHz
20to 39.999kHz
40to 79.999kHz
November, 1980
e
X
S
N
b
b
b
C
c
e
e
e
e
e
e
e
e
:b
e
e
e
e
e
e
e
e
b
b
b
c
c
c
c
c
e
e
e
e
e
e
e
'c
e
'
c
c
c
c
c
e
c
c
c
c
c
c
c
a
b
b
e
e
e
e
e
e
b
b
b
b
b
b
b
b
b
a
e
e
e
e
e
e
e
b
b
b
e
b
b
b
.
b
b
b
b
e
PRICES: (e) E1.96: (b) £232: (c £2.B e) £4,48.
AVAILABILITY: (a), (b),1c) stock items, normally available by return (we have
over 5003 items in stock). (e) 4/6 weeks normally but it is quite possible we
could be able to supply from stock.
N.B. Frequencies as listed above but in alternative holders and/or non stock
loads are available as per code (e).
ORDERING. When ordering please quote (11 Channel; (21 Crystal frequency;
(31 Holder; (41 Circuit conditions (load in pf). If you cannot give these, please
give make and model of equipment and channel or output frequency required
and we will advise if we have details.
4M. CRYSTALS FOR 70.26 MHz-HC6/U
TX 8.7825 MHz and RX 6.7466 MHz or 29.780 MHz £2.32.
10.246 MHz 'ALTERNATIVE" IF CRYSTALS £2.32. For use in Rye and
other equipment with 10.7 MHz and 455 kHz IF's to get rid of the "birdy"
just able 145.0 MHz in HC6/U, HC18/U and HC25/U.
CRYSTAL SOCKETS-HC6/U. HC13/U and HC25/U (Low loss) 16p each
CONVERTER/TRANSVERTERCRYSTALS-HC18/U
All at £3.00, 38.6666 MHz (144/28), 42 MHz (70/28), 58 MHz (144/28),
70 MHz (144/4), 71 MHz (144/2), 95 MHz (342/52), 96 MHz
(1,296/432/144), 101 MHz (432/28), 101.50 MHz (434/281, 105.6666
MHz (1,296/28) and 116 MHz 1144/281.
TEST EQUIPMENT FREQUENCY STANDARD CRYSTALS
200 KHz and 455 KHz in HC6/U £3.50
100 KHz in HC13/U end 1 MHz in HCS'U £2.95
5 MHz in HC6/U and 10 MHz + 10.7 MHz in HC6/U + HC25/U £280
CRYSTALS FOR MICROPROCESSOR USE
Please let us know your requirements eg 4 MHz NC 18/U 1
100 off £ 1.10, 1003 off 90p, 25,000 off 50p.
off £2.00,
ANZAC MD,108 DOUBLE BALANCED MIXER
5600 MHz supplied with full details for only £6.95,
2ALEXANDER DRIVE, HESWALL, WIRRAL, MERSEYSIDE L616í CT. Tel: 051-342 4443.
Volume
XXXVIII
THE SHORT WAVE MAGAZINE
587
WESTERN COMMUNICATIONS
(Galway) LTD.
KILCOLGAN, GALWAY, IRELAND
Tel. Within the State: 091-86206or 22567.
Telex: 8933MHTC El
UK Callers: 0009-86206or 22567.
RL DRAKE COMMUNICATIONS PRICE LIST
Model No. Drake M.
1242
DSR-2
1240
R7/DR7
1241
R7
Description
VLF-HF Synthesized Comm. Lab. Rec.
0.30 MHz, Gen Cover, Synthesized
Digital
Amateur Band, Analog Readout Rec.
I16Ú101
Professional Marine Ships Transceivers
TR77
Marine Transceiver
R77
Marine Receiver
MN77
Matching Network
MR3
Ships Main Receiver
Retail Price
UMK3
1340
UV3
£ 1118.50
£864.00
£2864.00
£1886.00
£216.80
£1907.00
Professional & Dedicated Amateur Communications Equipment
1336
TR7/DR)
105-30 MHz Continuous Tx/Rx Tcvr.
+ 0-1.5. + spot freq. operate if regd. . £ 1170..90
1338
RV7
Remote VFO
£149.50
1536
Aux7
Programme Board
only if 0-1.5 or
fixed freq.regd
£36.50
1537
NB7
Noise Blanker Module
if operating
mobile
£74.91
1529
FA7
Fan
MUST when operating RTTY or
SSTV
£23.41
7021
SL303
CW Filter fitted for the Professional
R.O.
£44.25
7022
SL500
CW Filter fitted for the Dedicated CW
Man
£44.25
7023
SL1800
SSB/RTTYFilter
£44.25
7024
SL6000
AM for Broadcast Reception Voice ..
£44.25
7026
SL4000
AM for Broadcast Reception Music +
Voice
£44.25
RTM Range Programme Modules
£6.25
1335
MMK7
Mobile Mounting Kit, incl. Cabinet +
Cables
£38.96
-
1333
£2686.00
-
-
...
NOTE above prices include 25% VAT. Overseas Buyers see below.
As exports are not subject to VAT deduct 20% for pre -VAT price and e
further 10% if payment made in Starting.
Rates also quoted for any Euro currency on request.
-
1343
1344
1346
1339
UV3
UV3
UV3
1339
Mobile Mounting Kit UV3-UHF/VHF
Tcvr.
Synthesized 144 FM Tcvr. (performance VHF at its best)
Synthesized 144-220FM Tcvr.
Synthesized 144/432 FM Tcvr.
Synthesized 144220-432 FM Tcvr.
Remote Head for UV3 System
£430.00
£ 572.00
£ 572.00
£716.00
£70.00
120/240V AC PSU for UV3
120/240V AC PSU for TR7
f 234.00
.
£53.39
Power Supplies
1504
1502
PS3
PS7
Major Accessories
£85.00
..
1528
1538
1539
1510
L7E
Linear Export 10-80M incl. WARC
MN7
MN2700
Antenna Network Match 2601V
Antenna Network Match 2KW
1531
MS7
WH7
Matching Speaker
1525EM
7073
7077
Encoding Mic. for UV3
Service/Extender Board Kit for TR7.
Desk ASTATIC Mic. for TR7
LOADS
DL300
DL 1000
TV75-HP
TV -42-LP
FILTERS
MANUALS
Dummy Load 300Watt
Dummy Load 1000Watt
HPFTVFilter mount on TV Set
100W cont. rate LPF: it works'
1000íV cont. rate LPF
Service Manual Comprehensive
.
Service Manual Comprehensive
1514
1525
7073
7077
1550
1551
1610
1605
1608
385-0002
385-0004
B-1000
TV -MM-LP
UV3
TR7
.
4:1 Balun, use with MN 7/2700
HF WattMeter/SWR 1.8-30MHz
-
£858.00
£ 134.00
£224.00
£ 19.00
...
...
...
.
£33.93
£70.00
£39.00
£44.00
£34.50
.
£23.50
£42.92
£11.00
£11,70
£20.81
£ 19.00
£ 22.90
Overseas Customers deduct 20% for Nett Export Price + a further
10% if payment in Sterling Rates also quoted for any EuroCurrency on
request.
Yachtsmen: Note where permitted, we can set up TR7for Marine semi
duplex use and retain all other functions.
Your nearest AGENT
West, Midlands and South for:
YAESU MUSEN; DRAKE; BEARCAT; H.M.P.; ANTENNAE; G. WHIP; STY; J. BEAM; CUSHCRAFT;
DANCOM Landmobile; QUARTZ Crystals; M. MODULES; DATONG; LUNAR; SPECTRUM; STANDARD;
DANCOM Marine; SAXTON Cable.
-
-
Importers
Exporters Factors
Distributors of Telecommunication Equipment
November, 1980
THE SHORT WAVE MAGAZINE
588
P.O. BOX 6, CASTLETOWN, ISLE OF
SE M
Tel: MAROWN (0624)
851277
3
) --
S.E.tvt. EZITUNE
S.E.M.
AN Sf:SQNA
tAMe1G
FE!klNS.
KF;YEH
1sD
lI
fisit
i
0.n
'..>.,":?.4N
,.áY:
_
r Mº^:
NEW! SENTINEL L.F. CONVERTER
10 kHz
2 MHz. I.F. 28
30 MHz. B.C., Beacons,
Time Sigs., Marine, etc. £20.80 Ex stock.
S.E.M IAMBIC KEYER
Undoubtedly the best keyer circuit. It uses the CURTIS
custom designed CMOS L51 chip. Sidetone, tune, etc.
As users say "I've never been able to use one before".
£ 34.50. Ex stock.
NEW! The World's first CMOS Twin Paddle Morse Key.
Gold plated touch contact paddles with CMOS
technology and no mechanical adjustments for only
£ 15.00. Ex stock. No supply is required when used with
the S.E.M. Keyer.
SENTINEL 2 METRE and 70 CM PRE -AMPLIFIERS
Ultimate performance pre -amps using for 2 metres a
selected J FET in a neutralised circuit giving a 1 dB N.F.
and 18dß gain. Makes the difference between solid
copy and just noise.
We have four models to choose from:
1. SENTINEL AUTO 2 METRE PRE -AMPLIFIER
From the inventors of r.f. switched pre -amplifiers. For
connection straight into the aerial lead and the r.f.
-
-
-
switch changes over automatically between transmit
and receive on any mode. See above for more detail.
12V nominal. Size: 1 " x 2f"" x 4". Price: £20.00* ex.
stock. 70 cm version £23.00* ex. stock.
2. PA5 AUTOMATIC 2 METRE PRE -AMPLIFIER
Same as the Sentinel Auto but for 240V mains
operation. Size: Front panel 3%" x 6'/4", 2Y4" deep.
SO239 sockets. Price: 28.75.
f
3. SENTINEL STANDARD 2 METRE PRE -AMPLIFIER
Same performance as the Sentinel Auto but no r.f.
switching. Price: £13.22*. 70 cms version £16.00*
Ex. stock.
4. PA3 DUAL GATE MOSFET 2 METRE PREAMPLIFIER
Mini 2 metre pre -amp. Size 1 cubic inch to fit inside
transceivers. N.F. 2dB gain 18dB. 9-15V. £8.00. 70
cm version £10.00. Both ex stock.
THREE SENTINEL 2 METRE POWER/PRE-AMPLIFIERS
All are linear, ALL MODES. Switch straight THROUGH
when switched OFF. R.F. switching switches at .1
watt. Latest SWR protected power transistors.
Receive J FET selected for 1dB N.F. 18dB gain, same
circuit as Sentinel V.H.F. pre -amp, see above. S0239
sockets. Nominal 12V supply.
SENTINEL 30
Ten times power gain, e.g. 3W in 30W
out up to 5 watts input. £50.00.
SENTINEL 40
Four times power gain, e.g. 10W in
40W out up to 16 watts drive. £66.70.
-
-
\e*
L.>.
TUNE:
TUNE
F..
M.
CASTLETOWN
t)
-
Ten times power gain, e.g. 10W in l7
SENTINEL 100
100W out up to 16W input. £126.50. All in stock.
All available without Pre -Amp. £8 less.
NOW
For the 100s who have asked. Mains power supplies for
our power amplifiers. 6amps for the 30and 50. £34.50.
12 amps for our SENTINEL 100. £45.00. Both Ex stock.
SENTINEL H.F. WIDEBAND PRE-AMPLIFIERS
2-40 MHz, 15dB gain. Ideal units for pepping up
receivers on 15 and 10, for OSCAR reception and as an
ACTIVE AERIAL. 9-12V supply. Size: 21" x 1+" x 3".
We make the following two versions:
1. SENTINEL STANDARD H.F. PRE -AMPLIFIERS
Performance as above £10.00* Ex. stock.
2. SENTINEL AUTO H.F. PRE -AMPLIFIERS
Same performance as above with a change over relay,
r.f. operated by your transceiver for direct connection
in your aerial co -ax. £16.93* Ex stock.
S.E.M. Z MATCH NOW COVERS 160- 10 METRES
This circuit is generally accepted as being the most
VERSATILE transmatch system.
It will match aerials of 15-5000 Ohms, to your
equipment. BALANCED or UNBALANCED at 1kW at
50 ohms. SO 239 and 4 mm terminals for co -ax or wire
aerials, both end fed and open wire. Price: £50.00. Ex
stock. Or incorporating EZITUNE £69.50.
S.E.M. FORWARD/REFLECTED POWER METER
£29.17 Ex stock.
-
S.E.M. EZITUNE
Makes SWR Bridges obsolete. Noise generator Et 50
ohm SWR Bridge Et R.F. Switch combine to allow you to
tune up your transmatch etc without transmitting.
Saves your P.A. Stops Q.R.M.
S.E.M. EUROPA C 2 METRE TRANSVERTER
£126.50. Repeater shift £15.00.
SENTINEL DUAL GATE MOSFET CONVERTERS
SENTINEL 2 metre converters: IFs, 28-30MHz,
4-6MHz, 2-4MHz. 2dB N.F. 30dB gain. £23.00 Ex
stock.
same as above with
- £26.50-Ex stock.
BAND CONVERTER - £20.80
SENTINEL X 2 metre converters
internal mains supply
SENTINEL TOP
stock.
Ex
Prices include VAT and delivery. *Belling Lee sockets X
standard, S0239s £1.73 extra. 12 months guarantee.
To order: C.W.O. or credit card. Phone your credit card
number for same day service. Belling Lee Plugs 25p.
PL259 plug and reducer 75p.
Need more info? Ring or write.
./..I.IC/.ïlJ.l./.Y'''./.Yl./J'../C%'J'l'./'l'./rI'.l''1'l./''llllJl./lYl./lll1J./'.
Volume
XXXVIII
THE SHORT WAVE MAGAZINE
DATDNG
ELECTRONICS
LIMITED
3 MAJOR NEW PRODUCTS
GENERAL COVERAGE CONVERTER MODEL PC -1
Parametric mixer plus LSI synthesiser give superb performance in
new general coverage adaptor for two -metre receivers.
Model PC -1 represents yet another contribution to the state-of-the-art from Datong. Combining a remarkable parametric
mixer with LSI synthesiser Model
PC -1 transforms any two -metre all -mode receiver or transceiver into a superb communications receiver covering 10
kHz to 30 MHz in thirty segments each
covering one megahertz.
Simply connects in two metre receiver's antenna lead Gives full coverage from 30
MHz right down to below 20 kHz Ultra simple controls - simply select the MHz band
required on Model PC -1 and tune the kHz on your two metre receiver. Correct input
filters automatically selected by internal logic High input intercept (10dbm) means
that PC -1 will not overload first Negligible internal noise generation Fully digital LSI
synthesiser design for long term reliability Attractive green LED illuminated dials
Compact attractive stying blends with all modern transceivers.
Our new parametric mixer completely eliminates conventional transistors or FET's from
the signal path and replaces them by varactor diodes. The result is superb strong signal
handling performance (input intercept 10 dbm) with negligible noise generation.
The combination of Model PC -1 with your good quality two -metre receiver will give
performance comparable to that of really top class general coverage receivers and far
superior to that of common general coverage receivers.
And the beauty is that you probably already own the expensive bit! In effect for just over £100 you get a general coverage receiver
of truly superb performance.
In operation Model PC -1 is delightfully simple. No manual preselector tuning is required. Instead internal
decoding logic selects
filters as the two decade "MHz" selector switches are operated. For operation at VLF (below 500 kHz) a panel push-button selectsone of six bandpass input
a 500 kHz low-pass filter.
This broadband technique gives almost constant high sensitivity over the full tuning range (even to 20 kHz!) and the
parametric high-level mixer avoids the
spurious signals which are often an undesired by-product of broad -band systems.
Model PC -1 requires a non-critical external power source of 12 volts at 100 mA. Our Model MPU is suitable (Price £6.90 including
VAT)
Price: £105.00 + VAT (Total: £120.75)
OUTDOOR ACTIVE DIPOLE ANTENNA MODEL AD370
Sensitive broadband receiving antenna for outdoor mounting, covering 200 kHz
to 30 MHz.
Model AD370 is a new active dipole antenna especially suitable for outdoor mounting and represents an addition to our existing active antenna
system (Model AD170).
FEATURES
Weather resistant construction for outdoor use Excellent sensitivity from 200 kHz to well over 30 MHz Strong
signal performance to professional standards Overall length only 104 inches. Uses two taper-ground stainless steel
whips 50 inches long
Fitted with 8 metres of coaxial down lead (easily extended if necessary) Good rejection of
interference picked up by the feeder due to excellent balance.
Model AD370 makes an ideal outdoor (or indoor) antenna for use with good general coverage communications
receivers.
Mounted outdoors, for example, screwed to a gable-end or window frame, the antenna is quite unobtrusive and can be
used where normal antennas would be impracticable.
The two 50 inch tapered steel whips supplied with AD370 give excellent pick-up sensitivity thanks to specially designed
circuitry. From below 200 kHz to well over 30 MHz Model AD370 gives performance virtually equivalent to very much
larger conventional antennas. Moreover compared with unbalanced antennas Model AD370 shows good rejection of
interference picked up by the feeder.
The active circuitry is housed in a substantial wetër resistant polycarbonate case with gasket seal. Eight metres of
coaxial cable are fitted as standard.
Model AD370 can be supplied either as an alternative head unit (complete with whips and feeder) for use with an
existing AD170 installation, or complete with interface unit for new installations. Model AD170 is of course still available.
as normal for indoor installations.
Prices:
Complete antenna system (comprising Model AD370 head unit with eight metre cable and interface unit type 1B5, requiring 12 volts at 140mA):
£45.00 + VAT, total £51.75
Special package price complete with MPU or MPU/1 mains power unit: £49.00 4- VAT, total £56.35
Model AD370 head unit with 8 metre cable (for use with an existing AD170 antenna system: £33.00 + VAT, total £37.95
VERY LOW FREQUENCY CONVERTER MODEL VLF
Converts
signals in the DC to 500 kHz range to the range 28.000 to 28.5000 MHz.
Model VLF adds the "missing band" to existing communications receivers. Most receivers do not cover the region below several hundred kiloherz. Model VLF
plugs the gap and gives high sensitivity in this neglected region.
FEATURES
Adds the VLF band to "general coverage" receivers. Simply connects in series with the antenna
Picks up Omega, time signals, beacons etc, plus
longwave broadcasts, with sub -microvolt sensitivity Used with an amateur -bands -only HF receiver Model VLF gives you quick access to LW and MW
broadcast stations (with reduced but usable sensitivity above 500 kHz) Quality construction in diecast box: S0239 connectors, crystal controlled, LED
indication, on/off switch Operates from built-in 9 volt battery (PP3) or external power supply (5-15 volts DC at 5 mA) Antenna connects straight through
when unit is switched off (for reception only).
Price: £22.00 + VAT, total £25.30
DATONG ELECTRONICS LIMITED
Spence Mills Mill Lane Bramley Leeds LS133HE. England Tel (0532) 552461
589
590
THE SHORT WAVE MAGAZINE
L
LIM
QSL leads the field in supplying crystals world wide to major communications companies, broadcasting
authorities and posts and telecommunications administrations. As a result we can supply the amateur with a
high quality, competitively priced product over a frequency range from 10 kHz to 225 MHz. Get the power of the
professionals in crystal supply behind you!
2 METRE STOCK CRYSTALS. Price £1. 83 for one crystal. £1.74/crystal
when two or more purchased.
RO
R1
R2
R3
R4
R5
R6
R7
S8
S9
S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
HC6/U
HC6/U
30pF TX
4.0277
4.0284
4.0291
4.0298
4.0305
4.0312
4.0319
4,0326
---
HC25/U
20pF and
30pF RX
HC25/U
25pF and
20pF TX
HC6 &
25/U
30pF TX
HC25/U
30pF and
40pF TX
8.0555
8.0569
8.0583
8.0597
12.0833
12.0854
12.0875
12.0895
18.1250
44.9666
44.9750
44.9833
44.9916
45.0000
45.0083
45.0166
45.0250
8.0611
12.0916
8.0625
8.0638
8.0652
12.0937
12.0958
12.0979
12.1000
12.1020
14.9888
14.9916
14.9944
14.9972
15.0000
15.0027
15.0055
15.0083
14.9444
14.9472
12.1041
12.1062
12.1083
12.1104
12.1125
12.1145
12.1167
12.1187
12.1208
12.1229
14.9500
14.9527
14.9555
14.9583
14.9611
14.9638
14.9667
14.9694
14.9722
14.9750
8.0833
8.0847
12.1250
12.1270
14.9777
14.9805
8.0861
12.1291
8.0875
12.1312
14.9833
14.9861
-
-
-4.0416
4.0423
4.0430
4.0437
18.1281
18.1312
18.1343
18.1375
18.1406
18.1437
18.1468
18.1500
44.8333"
44.8416"
44.8500"
44.8583"
44.8666*
44.8750*
44.8833"
44.8916*
44.9000"
44.9083*
44.9166*
44.9250"
18.1875 44.9333
18.1906 44.9416
18.1531
18.1562
18.1593
18.1625
18.1656
18.1687
18.1718
18.1750
18.1781
18.1812
18.1843
18.1937 44.9500
18.1968 44.9583
*HC25 only
Also in stock: RO to R7 for FT221 RO to R7 and S8 to S23 for
following: Belcom FS1007, FDK TM56, Multi 11 Quartz 16 and Multi 7,
Icom IC2F, 21, 22A and 215, Trio Kenwood 2200, 7200. Uniden 2030 and
Yaesu FT2FB, FT2 Auto, FT224, FT223 and FT202.
Also in stock 4 and 8 MHz TX in HC6/U for 145.8 MHz. loom crystals
TX for 145.6 MHz IRROI. 44 MHz RX crystals in HC6 for 145 (RAQ). All
at above price.
4 METRE CRYSTALS for 70.26 MHz in HC6/U at £2.25. TX 8.78250 MHz.
RX 6.7466 or 29.78 MHz in stock.
70cm CRYSTALS in stock 8.0222 and 12.0333 in HC6 £1.85. Aye
Pocketfone PF1, PF2, PF70 and Wood and Douglas £4.50 a pair or TX
£2.25, RX £2.50, SU8 1433.21 RBO, RB2, RB4, RB6, R810, RB1 1, RB13and
RB14.
CONVERTER CRYSTALS in HC18/U at £2.85. In stock 38.666. 42.000,
70.000, 96.000, 101.000, 101.500, 105.666 and 116.000 MHz.
TONE BURST AND I.F. CRYSTALS in HC 18/U at £2.25 in stock. 7.168 MHz
for 1750 kHz and 10.245 MHz for 10.7 MHz IF's.
FREQUENCY STANDARDS in stock £2.75, HC6 200 kHz, 455 kHz,
1000 kHz, 5.000 MHz and 10.000 MHz. HC13 100 kHz, HC18 1000 kHz,
7.000 MHz, 10.700 MHz, 48.000 MHz and 100.00 MHz.
PRICES ARE EX VAT. PLEASE ADD 15%.
uartSLab
MADE TO ORDER CRYSTALS SINGLE UNIT PRICING
Adjustment
Price
Group
SR RX
SR -.Series Resonance
I
November, 1980
MARKETING LTD
P.O. Box 73
Summit House
London SE183LR
Telephone: 01-690 4889 24 hr. Ansafone: Erith 1032241 30830
Telex: 912881 CWUKTX-G (Attention QUARTSLAB)
Cables: QUARTSLAB London SE18
Fundamentals
Tolerance
ppm
2001total
2001total
200 (total)
200 (total)
50
1
2
3
4
5
6
10
10
10
10
10
10
10
10
7
8
9
10
3rd OVT
5th OVT
11
5th, 7th &
9th OVT
14
12
13
20
20
15
Price and
Delivery
A
B
Frequency
Ranges
I
I
10 to 19.999
20 to 29.999
30 to 99.999
100 to 999.999
kHz
kHz
kHz
kHz
t.00to
1.499Mhz £9.00
1.50 to
1.999 MHz £4.75
2.00 to
2.599 MHz £4.75
2.60 to
3.999 MHz £4.55
4.00 to 20.999 MHz £4.55
21.00 to 24.000 MHz £6.00
21.00 to 59.999 MHz £4.55
60.00 to 99.999 MHz £5.00
100.00 to 124.999 MHz £6.15
125.00 to 149.999 MHz
150.00 to 225.00 MHz
-
£23.00
£16.50
£ 10.50
£6.00
£6.00
£4.20
£4.00
£3.70
£3.60
£5.40
£3.60
£4.00
£5.20
£6.00
£7.50
Unless otherwise requested fundamentals will be supplied with 30pF load
capacity and overtones for series resonance operation.
HOLDERS
Please specify when ordering
10 to 200 kHz HC13/U,
170 kHz to 170 MHz HC6 or HC33/U, 4 to 225 MHz, HC18 and HC25.
-
-
Please note that it is not always possible to provide the A delivery
service but a telephone call will confirm its availability.
Any orders received for A delivery when it is not available will
automatically be placed on B delivery and a credit note issued for the
difference in price.
DISCOUNTS. 5% mixed frequency discount for 5 or more crystals at B
delivery. Price on application for 10 or more crystals to same frequency
specification. Special rates for bulk purchase schemes including FREE
supply of crystals used in UK repeaters.
EMERGENCY SERVICE SURCHARGES Ito be added to A delivery
prices(. 4 working days £f2, 6 working days £7, 8 working days £5, 13
working days £3 (maximum of 5 crystals on 4 day delivery(.
CRYSTAL SOCKETS HC6/U and HC25/U 16p.
MINIMUM ORDER CHARGE £1.50.
COMMERCIAL USERS. Crystals can be supplied for MPU, industrial
control, etc. in the range 4-21 MHz fundamental and 3rd OVT 18 to
60 MHz at £1.15 for 100 off. This is only a limited example of our
capabilities. Please enquire about other quantities, frequency ranges,
watch and sub -carrier crystals. We can supply crystals for marine 'and
land mobile radio telephone use. Send for details.
TERMS. Cash with order, cheques and postal orders payable to QSL
Ltd. All prices include postage to UK and Irish addresses. Please note
Southern Irish cheques and postal orders are no longer acceptable.
Please send bank draft in pounds Sterling.
OVERSEAS DISTRIBUTORS
West Germany, Austria and Benelux countries
SSB Electronic, Karl
Arnold Str. 23, 5860 Iserlohn, West Germany.
Denmark Asbjorn Jorgensen, Aabrinken 1, Tapdrup, DK800, Viborg,
Denmark. Portugal
Sorubal SARL, Rua General Pimenta de Castro,
15-81, Lisboa 5, Portugal..
(Enquiries invited from companies in other countries.)
-
-
-
ROBOT '800' SUPER TERMINAL
McKAY DYMEK AM RECEIVERS
Their low price and international repute makes available a cost
effective option suitable for high level 'hams'. It is also suitable for AM
Hi-fi use.
All models have a frequency range SQcHz to 29.7MHz continuously
tuned by quartz crystal phase locked loop digital synthesiser.
Reception modes: AM, Upper Sideband, Lower Sideband, CW, RTTY.
Crystal, ceramic and mechanical filters used in IF stages.
High level RF front end using double balanced first mixer gives
freedom from intermodulation interference and overload.
Sensitivity 10dß IS + NI/N: max 0.35 NV at 29.7MHz
(max 0.75FV Model DR22).
Model DR22 illustrated.
European Agents:- Lee Engineering Ltd., Napier House, Bridge
Street, Walton -on -Thames, Surrey, KT12 1AP.
Tel. Walton -on -Thames 43124.
THE FIRST
INTEGRATED
RTTY, ASCII,
MORSE,
SSTV,
TERMINAL
The Super Terminal has everything you need for speciality mode operation
built in, with far too many broad capabilities and features to list here. Please
send 12 NP stamp for complete description and full details of this exciting
unit. £646 including VAT. H.P. available if required.
AERO AND GENERAL SUPPLIES
Building 33, East Midlands Airport,
Castle Donington, Derby DE7 2SA
Tel: (Yí92 812446 or 0602 397588
Volume XXXVIII
THE SHORT WAVE MAGAZINE
MAIL ORDER
FROM
MORSE KEYS
HK 707 Straight Up/Down keyer
BK 100 Semi -automatic mechanical
SHURE MICS
bug
MK 702 Up/Down keyer on marble
base
MK 702 Manipulator
MK 704 Squeeze paddle
MK 705 Squeeze paddle on marble
base
EKM 1A Morse code practice oscillator
MK 1024 Automatic memory keyer
EK 150
Semi/Automatic keyer
itreb-.
591
£10.06
201
£17.88
202
£22.43
£22.43
£14.38
401A
£22.43
£8.63
£135.13
£74.75
Minim
144MHz 10W input/80W
output with 9dB preamp
2M25 -150P 144MHz 25W input/150W
output with 9dB preamp
2M10 -150F 144MHz 10W input/150W
output with 9dB preamp
2M3 -150P
144MHz 3W input/150W
output with 9dB preamp
2M10 -80P
G.
MMT 432/144R
MMT 28/144
MMT 144/28
MMC 28/136
MMC 28/156
MMC 28/144
MMC 144/any IF
MMC 14428L0
MMC 70/any IF
MMC 432/28S
MMC 432/144S
MMC 1296/any IF
MMD 050/500
MMA 28 preamp
MMA 144 preamp
MMV 129623cm tripler
MML 144/1001inamp
Extenarod
£173.65
£90.85
£90.85
£24.90
£24.90
£24.90
£24.90
£24.15
£24,90
£29.90
£29.90
£32.20
£69.00
£14.95
£14.95
£34.50
£142.60
£228.85
£48.30
£113.85
£169.00
MML432/100linamp
MML 144/25 linamp
MML 432/50 linamp
MM 2000
SCANNING RECEIVERS
BEARCAT 220FB
BEARCAT 210
PUMA 20 900 channels
Programmable
STANDARD c800 10th +
power transmit CH
AR 22 Pokcer Receiver
144-150 MHz
ROTATORS
Stolle 2010
KR 400
AR40
KR 9502A
Rotor Bearing
£240.00
£220.00
£99.00
1
low
£79.00
£91.50
£47.50
£150.00
£59.00
£50.00
£12.00
UNADILLAIREYCO
Antenna Traps -
Precision moulded coil forms stainless - hardware - Aluminium tube
irridit finish - Coated aluminium wire.
Fully waterproofed.
Available 7/14/21 MHz
Doublets, Quads etc.
£9.99
STANDARD
C8800 2m Tcvr
C7800 70cms Tcvr
£252.00
£275.00
-
T-150
£209.88
£209.88
DENTRON
GLA 1000 Linear Amp
10/801Kw
£295.00
MLA 2500 Linear Amp
10/1602Kw
£699.00
MT 3000 3Kw Tuner/SWR/Dummy
Load
£275.00
UHF HAND HELD
New AR 740 Synthesised with
repeater split 2000 channels £219.00
SWRIRF POWER METERS
SWR 253.5/170 MHz
£12.94
LEADER LPM 885 -HF 1 Kw
£58.00
HANSON 3.5/150MHz 200w £28.75
REECE UHF 74 144/432
HANSON FS 500H
1.8/60MHz 2Kw
OSKAR SWR 200
3.30 MHz 2Kw
£67.85
All items over £100
available on easy terms
at List Price
£16.56
£32.43
£39.33
£32.78
£21.27
£22.42
£13.80
£8.52
£8.52
£16.67
£8.62
£21.27
£14.66
YE 7
YM 24
YM,37
YM 34
YM 35
ADONIS MICS
AM802G Compressor -3 outputs
AM502G Compressor -1 output
FP
FC
FT
FT
FT
FV
FDK MuIt700EX £199.00
FDK MuIt750E
£6.33
£22.94
YD 148
YD 844A
YM 21
YD 846
FV 901
FTV 901
SP 901
YO 901
FT 707
£299.00
707
707
78
101ZD
101Z
1012
FT
FT
FT
FV
FC
FP
£59 95
£39.95
225RD
720
107M
107
107
107
PLEASE PHONE FOR DETAILS
Send 30p for our
bumper bundle
literature
No Quibble Guarantee
Same Day Despatch
All Items Advertised
Choose your AMTECH here
Amtech 100 Mobile Match
Amtech 200 Random Wire ATY 10-160m
Amtech 300 Random and Coax Fed ATU
£16.95
£25.95
Amtech CW 250 -The most outstanding CW filter available
Amtech Channelguard
plug in device to eliminate those
unwanted stations
Decoder
Sender
Amtech FM7: FM Demodulator for FRG 7
£39.95
£24.90
£15.25
£7.25
£11.90
ANTENNAS
Wide range in stock including JAYBEAM
ASP TELECON - HOKUSHIN etc.
Special -Rubber Duckie ''4W BNC or 259
r10 POSTAGE REQUIRED
-
HYGAIN
-
CUSHCART
-
£6.50
CEI
AMCOMM SERVICES,
FREEPOST,
HARROW HA2 OBR.
£16.28
£40.00
£16.56
YAESU MICS
-A
194 NORTHOLT ROAD, SOUTH HARROW, MIDDX
Telephone: 01-864 1166, 01-422 9585
Opposite South Harrow Tube Station on Piccadilly Line
Tuesday to Saturday 9 5.30
Sunday by Appointment
connector
80W DC -500 MHz with
S0239 connector
150W DC-500MHz with
S0239 connector
Telephone for Prices and Literature
W2AU BALUN
3.5/30 MHz 2.5 Kw with Lightning
Arrestor - Suitable Vees, Yagis,
£15.18
30W DC-150MHz with PL259
T-80
YAESU PRODUCTS
FT 901DM
£9.99
AMCOMM SERVICES
Showroom Opening Hours
526T
£184.00
£24.73
£6.56
£3.34
£28.75
£6.56
£3.34
£17.25
£6.56
£4.49
£5.75
£11.50
Base Heavy Duty
MICROWAVE MODULES
MMT 432/28S
£136.85
444
DL20
£138.00
WHIP Mobile Antennas
Tribander 10-20 Slide
L.F. Coil 40/80/160 MTS
L.F. Whip Telescopic
Multimobile 10-20 Auto
M/Mobile Coil 40/80/160
M/Mobile Whip Telescopic
Flexiwhip 10M Mast
F/Whip Coils 40/80/160
Base Standard
by two way
FREEPOST
401B
£14.49
DUMMY LOADS
LINEAR AMPLIFIERS
AMCOMM
Hand ceramic omnidirectional
high impedance
Hand ceramic noise
reducing high impedance
Hand controlled magnetic
high impedance
Hand controlled meg. low
impedance (200 ohms)
Desk adjustable height
controlled magnetic
Desk controlled response
transistor preamp
Please send me
at
enclosed cheque/P.O. for
or charge my VISA/ ACCESS
N r.
Name
Address
Post Code
THE SHORT WAVE MAGAZINE
592
November, 1980
LEE
LEE
This is the new
FRG 7700
Look at these
features:
-
*
*
*
*
Full Coverage 150KHz to 29.999MHz
High Stability DUAL PLL System
Automatic Band Pass Filter Selection
3 Filters for AM Reception
PRICE £309 inc VAT
-
*
*
*
*
Fast/Slow AGC Steps
Narrow Band FM Reception Capability
Timer Facility
Optional 12 Channel Memory Unit
(with internal battery back-up)
Memory Unit £83.95 inc VAT
Memory Unit Fitted £389 inc VAT
-
BARCLAYCARD
400 EDGWARE ROAD
LONDON W2
01-723 5521 Tlx: 2.96765
YAESU
TRIO
MERSEYSIDE AMATEUR RADIO SUPPLIES
MARS WOULD LIKE TO THANK THE FOLLOWING PEOPLE FOR THEIR KIND HELP AND
INVALUABLE ASSISTANCE
G. F. COBB, G8TBY, G4DIT, G8TBK, G8TSE, GBIIS AND
MANY MORE-THANK YOU!
IF YOU WOULD LIKE TO BROWSE AND TAKE TEA WHILE CHOOSING A RIG. COME ALONG
AND SEE US AT WATERLOO. YOU ARE WELCOME TO SIT DOWN AND TRY OUT THE
EQUIPMENT ON DISPLAY
WE DONT GET NASTY IF YOU DONT WANT TO BUY
SOMETHING RIGHT THERE AND THEN. WE TRY TO SUPPLY MOST MAKES OF EQUIPMENT
TO ORDER. ALSO WE CAN ARRANGE TO HAVE ANTENNAS AND PSUs MADE TO YOUR
EXACT REQUIREMENTS.
IN STOCK NOW ARE A RANGE OF STATION ACCESSORIES FROM
MICROWAVE
MODULES, inc MM 2000 RTTV TO TV CONVERTER (ON DISPLAY), SEM, IAMBIC KEYER,
ZMATCH, EZITUNE. ALSO PRODUCTS FROM: REVCO, EAGLE, TAL, ROSS, EMOTO,
THANDAR and SCOPEX. THE STOCK OF SECONDHAND RIGS IS CHANGING DAILY AND
WE COULD ALWAYS USE MORE, SO, IF YOU CANT GET DOWN TO SEE US, PHONE OR
MAIL YOUR REQUIREMENTS.
...
-
-
TO
ACCESS
MERSEYSIDE AMATEUR RADIO SUPPLIES
BARCLAYCARD 117 OXFORD ROAD, WATERLOO, LIVERPOOL L22
B.
TEL: 051-920 7483
MON - SAT
09.00- 18.00
Volume
XXXVIII
THE SHORT WAVE MAGAZINE
593
70cm SYNTHESISED TRANSCEIVER
PH ILI PS FM321
**
**
*
**
*
*
SIMPLY YEARS AHEAD
Just look at its Star Packed features:
Full 40 channel coverage RBO to SU39. Direct LED display of channel number
Electronic Channel change up or down from front panel
Remote Control channel change on microphone
3 position squelch control for ease of operation
"Nominated Repeater Position" may be pre-programmed to your local Repeater
channel for instant access
Crystal controlled Toneburst operates in Repeater Mode
Receiver sensitivity 0.3p for 12dB SINAD
Transmitter output power 5W minimum, gives typically 25W e.r.p. with Jaybeam
U5 mobile antenna
Supplied complete with mobile mounting bracket, microphone with P.T.T. and
channel change, operating manual etc.
NOW EVEN BETTER t+
VALUE
AT ONLY
-
226 50
£2 50
Add £2.50
Carr. ft Pack:
f
Philips renouned FM321 has already proved to be the STAR of the '80s. It is availabie\from: Lowe
Electronics Ltd., Matlock; Stephens -James Ltd., Leigh; Booth Holdings, Bath; Waters Stanton,
Hockley.
Buy from your dealer or DIRECT FROM SOLE IMPORTERS: CATRONICS LTD. OF WALLINGTON.
CATRONICS are 300 yards from Wallington Railway Station (London Bridge or Victoria). Frequent
buses from Croydon and Sutton. Three large car parks within 100 yards. Hire purchase facilities
available on all equipment. Credit Cards accepted. Mail orders normally dealt with on day of receipt.
BARCLAYCARD
-
C atronics
VISA
MIME
LTD., Dept Si 1, Communications House, 20 Wallington Square, Wallington, Surrey SM6 8RG
Tel: 01-669 6700
Shop!Showroom open Mon to Fri 9am to 5130pm. Closed for lunch 12.45 to 14
b
Sat 9am to
1
pm.
C.B. ELECTRONICS
UNIT 3, 771 ORMSKIRK ROAD, PEMBERTON, WIGAN, WN5 8AT
Telephone: Wigan (0942) 216567
THE BEST IN THE NORTH-WEST
-
HOW TO FIND US
From M6 junction 26 follow signs for Wigan A577 at first traffic lights (T junction) turn right
towards Wigan. At next traffic lights you are there, BUTturn left and 10 yards further turn right by telephone kiosk.
Premises are slightly to your right. Plenty of parking space. Mileage from motorway 1/2 mile. From Wigan follow the
A577 Skelmersdale to traffic lights at Fleet Street, Pemberton (Ye Olde White Swan on your left). Turn right then 10
yards right again. By Co-op. Mileage from Wigan 21/2 miles.
YAESU
FT901DM
FT101Z
FT101ZD
FL2100Z
FT7B
FC902
FRG7
FL110
FT225RD
FT227RB
FT202
FT207R
FT107M
FT707
FP707
FC707
FC107
Charger
QTR24
YP150
£799.25
Morse keys
Standard
£488.75
£569.25
£362.25
£399.00
£126.50
£199.00
£149.50
Nye King
Nye King heavy duty
£499.00..
Palmsizer
Palm IV
£263.35
£99.00
£199.00
£680.00
F.D.K.
Multi 750E
Muti Uil
TM566
Multi 700EX
Emotator
£3.15
103LBX
£9800
£1200
502CXX
£145.12
£239.00
£13.50
£299.00
£249.00
£159.00
£159.00
£104.00
£199.00
£500.255
£109.25
£74,75
£97.75
£18.87
£18.40
£67.27
CDR Rotators
AR30
AR40
CD44
CD45
Ham IV
£47.15
£59.00
£109.25
£113.85
£166.75
1102
ASP Antennas
20095/8 wave
201 1/4 wave
397 Low Band
E462 UHF
677 5/8 wave
462 5/8 wave
Magnetic Base
Boot mount
High Pass Filter
-
HF Antennas
HQI mini beam
Cushcraft Verticals
£11.38
£4,31
£7.13
£6.75
£14.95
£7.56
£10.50
£3.50
£a00
Headphones
PTT mics
£5.20
£4.50
STANDARD
C8800
C7800
£25246
£275.45
ATV3
ATV4
£43.00
£76.00
ATVS
£79.00
Hi Gain
12AVQ
14AVQ
18AVQ
TH3MK3
2mColinear
Ringo Ranger
GPVS
TERMS: ACCESS, C.W.O. (CARRIAGE AND POST EXTRA AT COST)
BUSINESS HOURS
Mon, Tues, Thurs, Fri 9.30-5.30
Sat 9.30-4.30
Closed Wednesday
S.A.E. ALL ENQUIRIES
£96.50
£43.00
£60.37
£89.70
£186.00
£22.00
£22.00
594
THE SHORT WAVE MAGAZINE
November, 1980
NORTHERN COMMUNICATIONS
*
*
AMATEUR
COMMERCIAL
MARINE
YAESU, FDK, ATLAS, DENTRON, STANDARD, JAYBEAM
NAG, ASP, SWAN, G WHIP, MM, CDE, SEM
vavi,
CUSHCRAFT Power and Performance
ANTENNAS
-- Vertical
Vertical 10/15/20
80/10m
A144/7- 7element 1á1b Vagi 144Mhz
A144/11 element 11.3db Vagi 144Mhz
2148 - Junior Boomer 14 element 15db Vagi 144Mhz
A3219 - 19 element "Boomer"16.5db long Yagi
144Mhz
ARX2 - Ringo ranger 6db Vertical 144Mhz
AR10ATV3
ATV5
(a)
(b)
(a)
(a)
(c)
11
A10/3ATB34
£24.95
£27.85
£45.00
£64.00
£26.50
£22.00
£52.00
£72.00
(cl £139.75
(') £235.75
(c)
(a)
(a)
(b)
(b)
Ringo Ranger Vertical 10metres
3element Vagi
10 metres
- 3element Yagi 7.6db
7.6db 15metres
A20/3-3
A15/3
£35.40
£76.00
element Yagi 7.6db20metres
-3 Band HFYagi 7.5db 10/15/20 metres
NEW!
- WIDEBAND
ANTENNA NORCONE
The new "NORCONE DISC 512" is a wideband, unity gain
antenna, specially developed for coverage of 66 Mhz to 512 Mhz.
An ideal partner for the BEARCAT and other scanning monitor
receivers. It may also be used for transmission. Full coverage of
70, 144, 432 Mhz Amateur bands, Aircraft, Marine and Public
Services
la) £24.95
SWAN 100MX HF TRANSCEIVER
Now at a Price You Can Afford
-
80-10 metre Solid State, compact HF rig for mobile and fixed
operation. 235 watts input. Send for details of this amazing rig!,
Including VAT
FDK
£420.00
- MULTI 700EX & 750EX
Mains PSU also available.
Prices include VAT, 'carriage extra. (a) £1.50; (b) £2.50; (c) £3.50
In
M700E £199.60
watts) and M750EX (2m Multimode Mobile SSB/FM) are here
to offer you the very best in 2 metre operating at economic
M750 £299.00
OR our very own 2 metre 12 element ZL SPECIAL
ZL-12 13db gain from a 10ft bin long boom
....
(a)
£28.75
NEW Portable, Compact 8 element ZL SPECIAL
ZL-8
9.5dbg2inonlysttOnlongsplitboom....
(a)
the very best traditions of FDK the new M700EX (2m FM25
prices.
If you liked the Multi 700E then you'll love the EX version! The
new M750EX makes it possible to work the SSB DX, without
breaking the bank! Contact us for details.
'
117.25
303CLAREMOUNT ROAD,, HALIFAX HX36AW, West Yorkshire
VISIT OUR SHOWROOM Tues -Sat inc. 9.45a.m. - 5.30p.m.
Tel: (042Z 40792 and 24 -hour answering service
G3UGF
-
Buyit wth Access
BARCLAYCARD
VISA
MOM
SOUND ADVICE -- SOUND VALUE
-
A GOOD START is essential to short wave listening and expert advice is important in achieving this
So here's some
If you've made
up your mind to buy a receiver you should be aware it will perform only as well as the antenna it sees. The old adage regarding
wire
antennas "As long and as high as you can" is still good, but at best is only good for PEAK PERFORMANCE on one or two frequencies,
at
worst none.
Whichever frequency you tune your receiver to, for PEAK PERFORMANCE on all frequencies you need good matching between your
Receiver and Antenna to hear the best from it. If you plan to listen on the high frequency bands up to 30MHz then you know you
can't
have an antenna for every frequency! Or can you?
Wet, not quite! BUT we can offer you MUCH IMPROVED PERFORMANCEfrom
your receiver by using an antenna tuning unit, that will electrically change the length of your antenna to match the frequency you select
In other words
MATCH AT ALL FREQUENCIES.
You'll see many antennas being advertised under gimmicky names, but when it comes down to it they're only random wires or odd
configurations. At the end of the day, if you're expecting the performance the manufacturers specified, then you'll still have to buy an
antenna tuning unit.
Tell you what we'll do
we'll prove it to you
we'll give you one ABSOLUTELY FREE when you
your FRG 7 or FRG 7000 and
we'll give you complete advice on an antenna to suit your available space, which should only cost buy
you a couple of pounds!
So let's put the offer in big print for you!
-
-
-A
-
-
Yaesu FRG 7 + Amtech 200
Yaesu FRG 7000 + Amtech 200
Trio R1000 + Amtech 200
Yaesu FRG 77009 + Amtech 300
£ 199.00
£299.00
£299.00
£309.00
Yaesu FRG 77009 with 2 metres
Yaesu FRG 7700M + Amtech 300
Yaesu FRG 7700M with 2 metres
VAT included
Carriage £3.00
£315.00
£389.00
£ 399.00
What's the difference between the Amtech 200 and Amtech 300? Well both will tune any random length
of wire but the Amtech 300
will do a little extra it will also tune co -axial fed antennas
Their normal selling price? The Amtech 300 £39.95
The Amtech 200
£25.95
What can you lose?
So get cracking MAKE A GOOD START! HAVE PEAK PERFORMANCE
-
-
,o
Wage
isle
AMCOMM
e
V//rier/
JAYBEAM - HYGAIN - BANTEX - AMTECH - CUSHCRAFT - SWAN - ATLAS
and 50 other majòr lines - all
FROM THE OFF.
ex stock
AMCOMM SERVICES
194A NORTHOLT ROAD, SOUTH HARROW, MIDDX.
Tels: 01-864 1166 & 01-422 9585
Opening hours: Tues -Sat 9.00-5.30, Sundays by appointment. Closed Monday.
47/
Volume XXXVIII
THE SHORT WAVE MAGAZINE
W1I4A
.. ..a.
DECCA-KW107 SUPERMATCH
Antenna
Tuning System Incorporates E -ZEE
Match, SWR/RF power meter; Dummy Load :
Antenna switch.
DECCA-KW 109 SU PERMATC H
A high power version of the KW 107
DECCA-KW
E-ZEE
595
is
available.
DECCA-KW`W
ANTENNA
SWITCH.
Select*
up to 3 Antennas.
Low -insertion loas
up to 200 MHz. !kW
p.e.p. rating.
DECCA -KW FALUN
Mk. II
I
The Decca-KW Balun is broadband -3 to 30 MHz,
rated up to 2 KW p.e.p. I I Ratio 50 ohms
"unbalanced" feed to balanced" output. Waterproof moulded case. Suitable Mr Dipole and Beam
MATCH
Antenna Tuner 10-80 metres, matches 50175
ohm input to to -ax fed antenna's, also Fwin
feeder and single wire systems.
Other KW Favourites -Decca KW Dummy Load. KW Traps
(original and the best); KW Trap Dipoles ; Stockist for HY-Gain
beams and Verticals ; CDR Rotators ; Shure Microphones, etc Write or phone for catalogue..
Antenna.
Amateur Radio Products,
DECCA COMMUNICATIONS LTD.
Crampton Rd., Otford, Sevenoaks, Kent TN I4 SEA
Tel.: Sevenoaks (0732) 50911
SERVING RADIO AMATEURS WORLD-WIDE
&
I. ELECTRONICS LTD.
where equipment is fully overhauled
R. T.
EDDYSTONE.EC 10Mk.1. Receiver...
£131.10
£ 165.60
£ 109.25
£236.90
£236.90
£466.90
...
EDDYSTONEEC10Mk.2. Receiver...
EDDYSTONE 8400. Receiver
EDDYSTONE 940. Receiver ...
...
...
EDDYSTONE EA 12. Amateur B.S. Receiver
EDDYSTONE 830/7. Receiver
EDDYSTONE 9906.23087CMHz. AM/FM
DRAKE. SPR4Receiver
...
...
...
TRIO 9R59DS. Receiver
...
...
...
TRIO JR310Amateur B.S. Receiver
P.O.A.
£405.75
£91.60
£131.10
We are MAIN DISTRIBUTORS for AVO, MEGGER, TAYLOR and
SULLIVAN INSTRUMENTS
THE LATEST AVO AND TAYLOR METERS IN STOCK
AVO Digital Multimeter Model DA211
AVO Digital Multimeter Model DA212
AVO Digital Multimeter Model DA 116
AVO Digital Multimeter Model DA 117
Taylor Analogue Multimeter Model 131
Taylor Analogue Multimeter Model 132
£51.75
£74.75
£122.93
£155.25
£ 14.37
£20.70
Cases for AVO, TAYLOR & MEGGER instruments in stock.
Send for Details
We also repair all types of instruments
Trade and Educational enquiries invited
S. G. BROWN'S HEADPHONES. Type "F" 120 ohm, 2000 ohm, 4000
ohm, £18.05; Rubber Earpads for same, £2.87 per pr.; StandardJack
plugs, 50p.
ALL PRICES INCLUDE VAT AND CARRIAGE. Terms:
C.W.O., Approved Monthly Accounts, Hire Purchase and
Part Exchange. Special facilities for export.
R. T.
SINCLAIR EQUIPMENT
DM235 Digital Multimeter
Carrying Case for DM235
Mains Adaptor for DM235
PDM35 Pocket Digital Multimeter
PFM200 Pocket Digital Frequency Meter
YAESU MUSEN FRG -7 Receiver
YAESU MUSEN FRG -7000 Receiver
At
*
R.
£58.99
£10.92
£5.17
£35.59
£58.42
£204.75
£344.75
T.&I.
We have full H.P. facilities.
Part exchanges are a pleasure.
We purchase for cash.
We offer a first-class overhaul service for your electronic equipment, whether
you are an amateur or professional user.
We have EASY PARKING facilities.
We welcome your enquiries for specific items which although not advertised,
may very well he in stock.
PARTRIDGE "JOYSTICK". New improved VFA, £29.00. JOYMATCH 1118,
£22.55. LO -Z500, £28.62. JOYMATCH A.T.U. Kit, £10.50. A.T.U. Kit
assembled, £12.75. Artificial earth and bandswitch, £10.50.
*
*
*
*
*
TRIO EQUIPMENT.
New Trio R-300 Receiver, in stock, £193.89
All Bands with xtal calibrator.
526,T £35.42; 4.44, £29.21; 401A, £14.95; 202,
£13.80; 201, £13.11; 414A, £22.43; 4148, £22.43. Full details on request.
SHURE MICROPHONES,
SCOPEX OSCILLOSCOPES IN STOCK.
VALVES. Please state your requirements.
TMK METERS: Model TP1OS, £18.05.
Model 500TU-B, £33.23. Model
TW2OCB, £39.56. Model TP5SN, £21.27. Model 700, £68.42. Also in stock
Leather cases for above.
Model 7006, £72.16. Model 3020E (Digital) £115.00. Full details on request.
In present conditions we regret that all prices are subject to alteration without
notice.
& I. ELECTRONICS LTD.
Ashville Old Hall, Ashville Road, London El1 4DX Tel. 01-539 4986
NEAREST STATION: LEYTONSTONE (Central Line)
HOURS-9.30am - 5.30 pm MON.-FRI. CLOSED SATURDAYS
THE SHORT WAVE MAGAZINE
596
November, 1980
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SX200
32,000
CHANNELS
Et FM BANDS
WIDER COVERAGE: 26-58, 58-88, 108-180, 380-514
MHz; includes 10m, 4m, 2m, Et 70cm Amateur
bands.
5kHz Et 12'/zkHz FREQUENCY INCREMENTS
16 MEMORY CHANNELS WITH DIRECT ACCESS
SELECTIVE PRIORITY CHANNELS WITH LOCKOUT
2 SPEED SCAN; SCAN DELAY CONTROL
2 SPEED SEARCH UP AND DOWN
SEARCH BETWEEN PRESET LIMITS UP AND DOWN
3 SQUELCH MODES inc. CARRIER Et AUDIO
Dx Et LOCAL CONTROL
RELAY OUTPUT FOR Aux. CONTROL
EXTERNAL SPEAKER Et TAPE OUTPUTS
LARGE GREEN DIGITRON DISPLAY BRIGHT/DIM
AM -PM CLOCK DISPLAY
12v DC, 23W AC OPERATION
AM
See us on Stand 27 at the ARRA Exhibition at the
Granby Halls, Leicester.
8th, 7th
Et
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THE ULTIMATE SCANNER
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£241.50 INC. VAT Delivered
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8th November.
Access
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MAIN SERVICE
U.K. IMPORTERS Et DISTRIBUTORS:
Et SALES AGENTS:
GAREX ELECTRONICS
7 NORVIC ROAD
MARSWORTH, TRING
HERTS. HP23 4LS
Tel: Cheddington (0296) 668684
REVCO ELECTRONICS LTD.
POUNDWELL STREET
MODBURY, DEVON, PL21 ORQ
Tel: Modbury (0548) 830665
Dealer enquiries invited
Buy it weh.Acrecs
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BARCLAYCARD
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Radio Component Suppliers
J.
B I25R KSTRAIT
E T TLINCOLN
TH_ E
Telephone: 20767
WOOD AND DOUGLAS KITS available For Callers.
EDDYSTONE TRANSMITTING VARIABLE 30+ 30pf (6)0) @ £2.20.
HF -VHF POWER TRANSISTOR S181 Outline FM or SSB 27 to 70MHz,
40 Watt, 2 Watt Drive, 24 Volt Type 57CBLY at £4.50.
4500PIV 2AMP SILICON DIODES @ £1.50 each.
VHF -UHF TRANSISTORS 2N 918 @ 25p, AF 239 @ 50p, BFY [email protected]
50p, 2N 5179 @ 50p, 2N 5180 @ 50p.
POWER TRANSISTORS BU 127 @ 50p, BU 128 @ 55p.
MULLARD 808 TRIMMERS 4pf, 1Ctaf, 200, 600 @ 15p each.
BUTTERFLY PRE-SET VARIABLES Spindles easily extend 25x 25pf, @
50p, 38 x 38pf @ 60p. 38x 380 Wide Spaced @ 65p.
MINIATURE CERAMIC TAG STRIPS 12 way @ 15p, 21 Way @ 20p.
3/16" COIL FORMERS with core at 6 for 25p.
MINIATURE AIRSPACED 10p1 TRIMMERS @ 22p each.
SOLDER-IN FEED THRU's 1pf, 6.80, 27pf, 300pf, 10030. All at 20p doz.
FERRITE BEADS FX 1115 @ 15p doz. '/" Long Type @ 6 for 10p.
MULLARD SUB -MINIATURE 1000pí 63v.w. DISCS @ 25p doz.
VARIABLE CAPACITORS AIR SPACED 10+ 10+ 10pí for 75p.
UNMARKED GOOD 2N 3866 @ 3 for 75p.
UNMARKED GOOD 2N [email protected] 3for £1.10.
T03 FINNED HEAT SINKS For Mounting On P.C. Boards @ 30p.
ELECTRET MICROPHONE INSERTS with Fet Pre -Amp @ £1.85.
X BAND GUNN DIODES with data @ £1.65.
LN2 1JF
FERRITE RINGS Orange Ext. Dia. 7/8' Int. Dia. 3'8" @ 35p.
HP HOT CARRIER DIODES 58002800 @ 40p each.
VHF FETS BF 256C @ 4 for 75p, 8304 @ 30p, 4 for £ 1.
SUB -MINIATURE VHF CERAMIC TUBULAR TRIMMERS 0.5To 3pf @
15p.
SOLID SILVER WIRE ENDED TRANSMIT RECEIVE AERIAL SWITCHING
PIN DIODES with Circuits. Packs of 10 untested for £ 1.50.
BLY55 175MHz 4 WATT 13 VOLT 400 mW DRIVE with data @ £250
BLY9717'3MHz 4 WATT 24 VOLT 140mW DRIVE with data @ £3.
BFR64 470MHz 12-24 VOLT 4 WATT with data @ £4.
35pf, 10
CERAMIC TRIMMERS 25 To 60, 3To 1Cpf, 4.5 To 20pf, 6
To 4Cpf, 10 To 60pf, All at 15p each.
T
UHF MODULES
POWER MODULE 420 To 470MHz, 12 Volt Min Power Out 1.2 Watt for
20nW Input Type BGY 21 @ f12
POWER MODULE 380 To 512 MHz Min Power Out 2.5 Watt For 50nW
Drive Type BGY 22C @ £1250.
POWER MODULE 420-480 MHz Min Power Out 7 Watt for 2.5 Watt
Drive 12.5 Volt Type BGY 23 @ £15.
X BAND DETECTOR DIODES UKE SIM 2 @15p, 1N23 @ 25p.
X BAND TUNING VARACTOR DIODES 1 To 20 or 2 To 4pf. Both
£1.66.
POWER FETS VNIOKM @ 40p each.
WIRE ENDED VHF R.F. CHOKES 10 U.H., 30 U.H., 330 U.H. All at
7p each.
MAINS TRANSFORMER 250 Volt Input, Out 43 Volt 50mA, 11 Volt
2.5 Amp, 22-0-22 Volt 50mA, 16 Volt 120mA, 15 Volt 1,5 Amp,
20 Volt 275 mA @ £3.90 (P&P E1.20).
HFC600
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£ 123
Please add 20p for post and packing, unless otherwise stated.
Volume
XXXVIII
G4DSG
THE SHORT WAVE MAGAZINE
D. P. HOBBS LTD.
NEW FROM
RE ATHKIT
G3HEO
THE RADIO COMPONENT SPECIALISTS
FDK 700EX 144146 MHz 12% 8 25 Khz steps, scan., etc
FDK 750E Multimode FM/SSB/CW. TCVR.
R517Aircraft Band Monitor Rec., VFO + 3fixed channels
DAIWA SR9 2mtr Monitor Rec., VFO + 11 fixed channels
YAESU FRG7 PLL communications rec., 5-30MHz
LOWE SRX30PLL communications rec., 5-30MHz
DM35050k P.T.T. hand mic
£4.83 +
£ 199.00
£299.00
£49.75
£46.00
£199.00
£158.00
From the finest range of electronic kits in the world: two
new top quality kits you can build easily.
2 Metre FM Digital Scanning Transceiver
Fully synthesised with digital readout, it scans 2 metres
complete, monitors selected frequency before scan and
provides Simplex and Repeater operation.
An AC power supply is also available.
2 Metre 80 Watt Mobile Amplifier
This is suitable for all models and available for Base
Station use with AC supply models.
Full information of these and all Heathkit Amateur Radio
Kits is available in the Heathkit catalogue.
Send for your copy today.
30p pep
30p pep
DL20 Dummy Loads 15watt 30watt peak. PL259
£6.04+
SEIF 13.8v 4amp power supplies
£22.95 + £1.20p&p
HANSEN FS601MH peak reading (SSW watt meter S.W.R. bridge..£46.00
HANSEN FS500H 20/200/2 KW peak reading watt meter S.W.R. bridge
£67.85
REACE UH74 144/432 MHz watt meter S.W.R. bridge with remote head
£17.00
MICROWAVE Modules 2 mtr, 70cM, 23cM, converters. MMT 144/28,
MMT 432/28S.
MMT 432/144R transverters. MML 144/25 watt linear amps.
ELECTROLYTICS 400mfd 400v 700mfd 350v.... £ 1.20 + 30p pep each.
70p
Double sided Fibreglass P.C. Board approx 6" x 4"
Universal Test Lead Kit. Screw in Probes, Croc Clips, Spades Banana
Needle Point Tips
£2.10 + 30p pep
Ascot, Bantex Et Jaybeam Aerials.
Veroboard, Veroboxes, Ally a Plastic Boxes, Resistors, Capacitors, ICs
etc. Bernards a R.S.G.B. Books.
Transformers as last month's ad.
All Mail Orders to Luton.
Prices include VAT.
11
Open 9 am
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To: I leach Electronics (UK) Limited. Dept (SWII). Bristol Road.
Gloucester GL2 6E.E. Please send mea copy of the leathkit catalogue.
I
1
enclose 25p m stamps.
N-1mo
Address
Access Barclaycard.
Kings Street, Luton, Beds. Tel. 20907
5.30pm Mon - Sat. closed all day Wednesday
NB: If you are already on the I lcathkit mailing list you will
automatically receive a copy of the latest Heathkit catalogue
without having to use this coupon. When you receive your
catalogue you will get details of this free offer.
Soldering
Iron otter
FREE
Also visit D. P. HOBBS NORWICH LTD.
13 St. Benedict's St., Norwich. Tel. 615786
597
-
Closed all day Thursday
T- HHErmv
NA
YOUR
YAESU MUSEN
SOMMERKAMP
IMPORTER
GEMINI
1
FT -101Z
FT-101ZD
FRG -7
FT225RD
CPU -2500R
FT207R
FT107
FT -901
FRG -7000
COMMUNICATIONS
FT227R6
FT -7B
FT707
Railway Road, Blackburn, Lanes, Telephone: 51842.
(Telephone Evenings: Bolton 592929 G4GHE)
FT -101Z
All ex -stock and FREE SECURICOR DELIVERY
APPOINTED JAYBEAM DISTRIBUTOR FOR NORTH WALES
ASP MOBILE ANTENNAS. SEM PRODUCTS STOCKED
FULL RANGE OF AMIDON TOROIDAL CORES IN STOCK
SOMMERKAMP TS280FM 40WATT/10WATTS
80 Channel 50 watt 2 metre Transceiver. Rapid channel switching with
digital read-out. Tone burst 10 watts low power output switch. Complete
with mobile mount a mic for £ 199
Low power version 10 watt/1 watt £159
SOMMERKAMP TS802
Hand held 80channel 2watt 2 metre Transceiver. Electric scanning, digital
readout, tone burst. Complete with carry case, flexible aerial and a battery
charger for £159. FT480multimode £349. FT720 £315.
SOMMERKAMP
FRG7
£188. FT207RE
£195. FT227RAE
£225. FT3071=FT107
with extras)
£914. FT277ZD FT101ZD = FT277ZD
£949. FT901
with £90 worth of extras at £639 = FT101ZD with extras)
£661 and the new FT767) = FT707with C. W. filter a scanning mic at £539.
ROTATORS. ANTENNAS, GENUINE SOMMERKAMP SWR BRIDGES
AND 12 VOLT POWER SUPPLIES.
All prices include VAT. Barclaycard and Access welcome.
H.P. terms available. Part Exchange S.A.E. for details
-
-
-
-
-
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STANDARD 8800 2m FM MOBILE
STANDARD 7800 70cm FM MOBILE
KDK 2025 2m FM MOBILE
FDK MULTI 700EX 2m FM MOBILE
FDK MULTI 7502m SSB/CW/FM
FDK PALMSIZER 2M FM
FDK PALM 2 2m FM
FDK PALM 4 70cm FM
BELCOM HC14002m FM MOBILE
BEARCAT 220 FB
SR9 2m MONITOR RECEIVER
5X200 SCANNING RECEIVER
*
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£252
£275
£250
£225
£299
£149
£99
£159
£199
£258
£46
£240
*
SPECIAL OFFER: Swan 100 MX Tranceivers
£384. Normally £418. Limited stocks.
*
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TMP ELECTRONIC SUPPLIES
Britannia Stores, Leeswood, Mold,
Clwyd CH74SD
Tel: Pontybodkin 846 (035287)
Shop hours: Mon, Wed, Thurs, Fri, 9.345 pm; Tues
Er
Sat, 9.331 pm
THE SHORT WAVE MAGAZINE
598
November, 1980
("SITUATIONS" AND "TRADE")
THE SHORT WAVE WIZARDS
20p per word, minimum charge £2.40. No series discount. All charges
payable with order. Insertions of radio interest only accepted. Add 50 per
cent for Bold Face (Heavy Type). No responsibility accepted for
transcription errors. Box Numbers 40p extra. Replies to Box Number
should be addressed to the Short Wave Magazine, Ltd., 34 High Street,
Welwyn, Herts., AL6 9EQ.
TRADE
Trio R1000 PLL C£tL
SWL
Communications
Receiver 200 KHZ to
30 MHZ.£297.00
-
Tonna (F9FT) antennas for 2m., 70cm. and 23cm. Send 30p
for full catalogue.
Randam Electronics (S), 12 Conduit
Road, Abingdon, Oxon. OX14 1DB.
Racal RA -117 in mint condition, as new; Eddystone 680X;
G.E.C. BRT -400; Army R. 107; Marconi CR-100; BC -221;
Codar PR -30X; Joymatch. All overhauled and checked in
good condition!! Large stock (15,000) of new crystals from £1
each, 100 kHz to 111MHz. Please send s.a.e.
Birkett, The
Moorings, Halvarras Road, Playing Place, Truro, Cornwall.
-
TRIO EQUIPMENT
R 820The
ultimate S.W.L. Receiver
£690.00
£37.95
£21.85
£10.35
SP 82OMatching Extension Speaker
HS 5Communications Headphones
HS 4Communications Headphones
Full Range of Trio Transceivers in Stock.
(Tel: 0872-862575).
Frome, Somerset.
COMMUNICATIONS RECEIVERS
Lowe SRX30 Still the Best Value
YAESU FRG 7 General Coverage
YAESU FRG 7000 Digital Readout
All YAESU Transceivers available.
£158.03
£ 199.00
£359.00
-
UK aircraft frequencies list, £1. UK marine frequencieslist, £1.
Including HF, VHF.
PLH Electronics, 20 Vallis Road,
SX-200 scanning receiver covers most bands from 26-512
MHz, AM/FM, £208.00 + VAT. Send s.a.e. for data.
W.
H. Westlake, Clawton, Holsworthy, Devon.
-
Bearcai 220FB as advertised, two available at £214.75
including VAT and carriage each.
N.V.R. Communications
Division. Telephone 0670-827480.
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ICOM AMATEUR EQUIPMENT
LAR are Yorkshire's largest stockists of the full
ICOM range of transceivers.
V.H.F. AMATEUR RECEIVERS
Search SR9 V.F.O. or crystal control 2M F.M. 144146 MHZ .
(Marine 156 to 162 MHZ also available)
AMR 21788 2M F.M. Scanner 144146 MHZ. Fitted 8crystals
battery/mains. The best and most popular 2m. monitor
Extra crystals for the above receiver
.
TUNERS, SWITCHES AND SHACK CLOCKS
K x 2 SWL Antenna Tuner 500KHZ to 30MHZ
LAR OMNI Match IHF VHF Mobile & Linear. Send 20p for details)
Cx/3SWL 3wayantenna switch
LAR KW P.E.P. Feeder Switch (Switch to Quality)
COPAL 24 hour Digital clock mains operated
£46.00
£120.00
£2.50
£29.90
£5.60
£
1
16.95
£12.95
AIR BAND RECEIVERS
Sharp FX 213AU Hand held portable
SKY ACER 517 VFO and crystal control
16.00
£49.50
December issue: Due to appear November 28th. Single copies
at 60p post paid will be sent by first class mail for orders
received by Wednesday, November 26th, as available.
Circulation Dept., Short Wave Magazine Ltd., 34 High Street,
Welwyn, Herts. AL6 9EQ.
-
-
QSL cards. Sample pack and price list forwarded on receipt of
20p stamp.
Derwent Press, 69 Langstone Drive, Exmouth,
Devon EX8 4HZ.
-
Good second-hand equipment always wanted. Come to
AMATEUR RADIO EXCHANGE for the best deal.
2
Northfield Road, Ealing, London W13 9SY. (Tel: 01-579
5311.)
£
SIGNAL R 512Scanner Fitted SChannels
Crystals for R 517or R 512
Regency Digital flight scan (no crystals required)
BEARCAT 220FB. Scanner 66to 512 MHZ
£ 138.03
£2.80
£230.03
£258.75
(All prices include VAT. Securicor delivery arranged on request)
Buy by post or phone your Barclaycard, Access, or LAR Creditcard
number. Alternatively, call in for a chat. The shop is just 10 minutes from
Leeds City Station, and there's easy parking if you travel by car * Instant
HP for licensed Amateurs * Extended Credit Terms Available
Send 50p
for Catalogue and Price List.
*
Leeds Amateur Radio
27 Cookridge Street, Leeds, LS? 3AG.
Tel: 782224
TRIO DISTRIBUTOR. LAR are area distributors for Jay Beams, Antenna
Specialists, Hilomast, Icom, Microwave Modules and Ascot Products.
Radio Amateur Examination City and Guilds. Pass this
important Examination and obtain your G8 Licence with an
RRC Home -Study Course. For details of this and other
courses (GCE, professional examinations etc.) write or phone:
THE RAPID RESULTS COLLEGE, Dept. JV1, Tuition
House, London SW 19 4DS. Careers Advisory Service, 01-947
7272 or ring 01-946 1102 for Prospectus (24 -hr. Recordacall.)
-
QSL cards. Quality printing to your design, or ours. 12p stamp
only for folder showing actual samples.
Express Printing
Services, 28 Payne Avenue, Hove, Sussex.
READER'S ADVERTISEMENTS
lop per word, minimum charge £1.50 payable with order. Add 25 per
cent for Bold Face (Heavy Type). Please write clearly, using full
punctuation and recognised abbreviations. No responsibility accepted
for transcription errors. Box Numbers 40p extra. Replies to Box Number
should be addressed to the Short Wave Magazine, Ltd., 34 High Street,
Welwyn, Herts., AL6 9EQ.
Volume
XXXVIII
THE SHORT WAVE MAGAZINE
READERS
CALL BOOKS
For Sale: Trio QR-666 receiver, mint condition, with
instruction book, £100 or near offer.
Ring Foley,
02406-2264.
-
INTERNATIONAL:
RADIO AMATEUR CALL BOOKS (1980)
"DX Listings"
£9.65
£10.15
£3.80
"U.S. Listings"
U.K. Call book, 1980 Edn, (RSGB)
Selling: ARAC-102 28/144 MHz FM/AM/SSB receiver, £75.
Yaesu FL -110 linear, £95. Avanti 28 MHz quad, £55. All
unused and in original cartons. Wanted: Eddystone R.216 or
similar.
Ring Adkins, G3SEV, 0702-585548 (Essex).
-
MAPS
-
Eddystone EC -10 Mk .I receiver, good condition, £70.
Ring Mitchell, G8XKZ, 01-361 1666.
Sale:
"SHORT WAVE MAGAZINE" DX ZONE
MAP (GREAT CIRCLE)
In colour, New 9th Edition/
f3.35
AMATEUR RADIO MAP OF WORLD
Mercator Projection
Much DX Information
in colour. Second Edition
£1.10
RADIO AMATEUR MAP OF THE U.S.A.
AND NORTH AMERICA
State Boundaries and Prefixes, size 24" x 30",
-
-
599
paper
-
Selling: Marc (Lloytron) NR-52F1 de -luxe 12 -band portable,
Ring Varney, Menai Bridge
714759, evenings.
AM/FM, one month old, £120.
-
Wanted: For collection: German military radio equipment of
W.W.II vintage.
Box No. 5725, Short Wave Magazine
Ltd., 34 High Street, Welwyn, Herts. AL6 9EQ.
95p.
-
Wanted: "SWL Antenna Construction Projects" by E. M.
Noll.
Lissok, rue M. Poedts 9, B-1160 Brussels, Belgium.
RADIO AMATEUR'S WORLD ATLAS
In booklet form, Mercator projection, for
desk use. Gives Zones and Prefixes
(Latest 10th Edition)
£1.65
LOG BOOKS
Amateur Radio Logbook
Receiving Station Log
£2.60
£1.70
£1.10
Mobile Logbook
(The above prices include postage and packing)
-
Wanted: Sony CRF-220 or 320 receiver, cash waiting by
Ring Smith, 01-834 3007.
private buyer.
Sale: FRG -7, excellent condition, with SSB filter, £130.
Ring Brooks, Tunbridge Wells (0892) 824371.
-
-
Wanted: Information on the Eddystone Type 3873A receiver.
Davis, 69 Lexington Drive, Pickering Road, Hull.
Available from:
Short Wave Magazine
Publications Dept.,
34 High Street, Welwyn, Herts. AL6 9EQ
For Sale: FRG -7 receiver, mint condition, £150. Magnum 144
MHz transverter, £60.
Ring Poulter, G3WHK, 01-330
-
5795.
Sale: Collins
51J-4 receiver, 0.5-30 MHz,
with
3
kHz
mechanical filter, excellent condition, £275. Collins
R.388/URR with 51J-4 mod. 6 kHz filter, £150. LM -7
Tel: Welwyn (043871) 5206/7
(Counter Service, 9.30-5.15 Mon. to Fri.)
(Giro A/c No. 547 6151)
-
frequency meter (similar to BC -221), no PSU, £15.
Zagorski, 7 Reid Road, Invergordon, Ross -shire, Scotland.
Advance OS -1000A dual -trace oscilloscope, in
original packing, manual, little used, £290.
Ring
Basingstoke 3715.
Selling:
MORSE CO BY THE RHYTHM METHOD!
FACT NOT FICTIONS
No expensive equipment required on/ye turntable
If you start RIGHT you will be reading amateur and commercial Morse within a
month. (Most students take about three weeks). That's why after 25 YEARS
we still use three scientifically prepared special records with which you cannot
fail to learn the MORSE RHYTHM automatically. Its as easy as learning a tune.
18 w. p.m. in 4 weeks guaranteed. Complete course comprising 2 x 12" + 1 x
7" multi -speed records + books. £5.50 plus (U.K. p.p. + 75p. Overseas,
sufficient for 750 grms,) Despatch by return from:- S. Bennett, G3HSC,
(Box 14), 45 Green Lane, Purley, Surrey CR23P0.
01-660 2896
ALL
Call or phone for a
most courteous quotation
VALVES
01-749 3934
& TRANSISTORS We are
one of the largest
stockists of valves etc.
COLOMOR ELECTRONICS LTD.
-
Wanted very urgently: Hammarlund SP-600JX Rx.
Maidstone 54193 evenings.
Sale: Yaesu FRG -7 receiver, excellent condition, £ 135.
Shippey, 0532-684439.
-
Ring
Ring
Wanted: By A.T.C. squadron: LG -300 transmitter, HRO
receiver, and coil units for No. 46 Set.
Ring Rowlandson,
Warwick (0926) 497330.
-
-
For Sale: As new TS -820S, SP820 and MC -50, £550 secures.
Ring for details.
Nick, 0270-627937 (Nantwich, Cheshire)
after 7 p.m.
in the U.K.
170 GOLDHAWKROAD
LONDON W12
-
Selling: Yaesu FRG -7 communications RX, new, unwanted
gift £170.
Ring Whalley, Southampton (0703) 863944.
600
November, 1980
THE SHORT WAVE MAGAZINE
TIME EXACT?
-
never gains or
MSF CLOCK is ALWAYS CORRECT
loses, self setting at switch -on, 6 digits show Date,
Hours, Minutes and Seconds, larger digit Hours and
Minutes for easy QUICK -GLANCE time, also parallel
BCD output and audio to record and show time on
playback, receives Rugby 60KHz atomic time
signals, built-in antenna, 100Km range,
ACCURACY, £54.80.
LOSING DX? ANTENNA FAULT? Check it FAST with
an Antenna Noise Bridge, MEASURE resonance
1-150MHz and radiation resistance 2-1000ohms, no
confusion with harmonics, MORE DX, £11.80.
RARE DX UNDER QRM? DIG it OUT with a Tunable
Audio Notch Filter, between your rx and speaker,
BOOST your DX/QRM ratio, 40dB notch, £ 10.90.
V.L.F.? EXPLORE 10-150KHz, Receiver £13.70.
MISSING DX? Make them HEAR YOU with a Speech
Compressor, between your microphone and
transmitter, BOOST your POWER up to 4 times,
£9.90.
SIG. GEN. 10Hz-200KHz, logic and variable sine and
square wave outputs, harmonics for it, rf, £12.80.
NO RADIO 4? 200KHz Converter, get ALL the NEWS,
suits any medium wave receiver, £14.40.
Each fun -to -build kit includes all parts, printed circuit,
case, postage, etc, instructions, money back
assurance so GET one NOW.
CAMBRIDGE KITS
45 (SL) Old School Lane, Milton, Cambridge.
CO-AXIAL CABLES
UR43 50 ohms. The most popular standard Coax. 5mm dia. 20p per Metre
(post 2hp)
ÚR76 50 ohms. About the same spec as ÚR43 end the same size but a
stranded inner conductor. 22p per Mette (2ysp)
UR95 50 ohms. Miniature. Polythene & Nylon 2.3 dia. 25p per Metre (1p)
UR67. The thick low loss 50 ohm Y." die. Coax. 60p per Metre (4',4p)
UR7075ohm standard Coax. Stranded Sam die. Stranded inner conductor
20p per Metre (21/20
UR39. Low Loss 75 ohm about 35" dia. 35p per Metre (3p)
CX4007 75 ohm. Low loss UHF TV Feeder, good quality. Price lap per
Metre 121/2p)
300 Ohms. Twin ribbon feeder PVC Polarity coded. -A very popular line @
lip per Metre (11/2 pi
Mains. 3 core White PVC Mains to carry about 3-5e @ below trade price.
14p per Metre (3p)
Mains. Twin Mains 3-5 amp flat. Bp per Metre (2p1
Mains. Twin transparent. Light twisted @ 4p per Metre (1Y. p)
Multicore Screened: 8 core screened in up to 10m coils @ 15p per Metre
(3p); 20core screened in up to 1Qn coils @ 26p per Metre (5p).
SAE for Full Lists.
W. H. WESTLAKE, Clawton, Holsworthy, Devon.
-
5 -NB noise blanker for Drake RR -2 receiver. Details
and price please.
G. Lofqvist, Majorsgat 5A, 71308
Goteborg, Sweden.
Wanted:
-
Sale: Heathkit IG -18 sine square audio generator, as new, with
manual, £58.
Ring Basingstoke 3715.
Sale: FT -401B, FV -401, with spare valves (6KD6, 6GK6, 7360,
-
all Toshiba), in immaculate condition, any trial, £300 or near
Turnbull, G4ESA, 26
offer. Genuine reason for sale.
Livingstone Road, Southsea, Hants. PO5 IRL. (Tel:
Portsmouth 28688).
-
Selling: Sommerkamp FL -200B HF transmitter, with mic.,
manual and spare Toshiba PA's, £100.
Ring G4IPW,
061-764 4511.
-
Wanted: To buy or copy, circuit for Hammarlund HQ -180A
Rx. (Herts).
Box No. 5726, Short Wave Magazine Ltd., 34
High Street, Welwyn, Herts. AL6 9EQ.
-
Sale: FT -7, £260. Ultra Cubs, £20. FM -118, £20. HRO, all
coils but dial faulty, £20.
Ring Keyser, G3ROO, Dover
821588.
-
Wanted: Yaesu FT -101, Trio TS-520SE, or similar transceiver.
Must be in good condition. Details and price please.
Ring
Davis, South Shields 566658.
-
For Sale: HAL DKB-2010 keyboard (RTTY-Morse), 128K
memory, RVD-1005 VDU, as new (cost £670), £400.
Barry,
G3UFU, l0A Henbury Close, Torquay, Devon.
-
Sale: FRG -7, Joystick VFA, 11B ATU, boxed, hardly used,
also selection of radio books, £180 or near offer.
Ring
Charlton, Oxford 44239.
-
Selling: Heathkit ID -28 capacitor/resistance tester, as new,
with manual, £38.
Ring Basingstoke 3715.
December issue: due to appear November 28th. Single copies
at 60p post paid will be sent by first-class mail for orders
received by Wednesday, November 26th, as available.
Circulation Dept., Short Wave Magazine Ltd., 34 High Street,
Welwyn, Herts. AL6 9E0.
-
RADIO AMATEUR PREFIX-COUNTRY -ZONE LIST
published by GEOFF WATTS
Editor of "DX News -Sheet" since 1962
The List you have always needed, the list that gives you everything, and
all. on one linel For each country:
a. its DXCC "status"
e. the continent
b. the normal prefix
f. the "CO" Zone No.
c. the special prefixes
g. the ITU Zone No.
d. the ITU callsign block allocation
Full information on Antarctic stations, USSR Klub -stations, obsolete
prefixes used during the past 5 years, and much more, and the List can
be kept always up-to-date because ample space has'been provided for
adding every new prefix, each new (TU allocation, etc.
Everything arranged alphabetically and numerically in order of prefix.
Ideal for Contest operators and SWL's.
Tell your Club -members about it. Order an extra copy for that overseas
friend. 15 pages. Price 50p(UK),Fovveerrssearair mail) 32.00 or 6 IRCs.
-
-
For Sale: FRG -7D, hardly used, condition immaculate, with
60 -ft. wire aerial, £200.
Ring Barker, 01-651 2925.
-
62 BELMORE
ROAGGD,
NORWICH NR7 OPU, ENGLAND
Selling: BC -221 and power pack, £35. TS-174U and power
pack 20-250 MHz, £45. Racal RA -218 SSB converter, £75.
UHF receiver, tunable, £50. VCR -I39 3 -in. CRT, £5.
Transistor/diode tester, £25. FM tuner and PSU, £15. VHF
receiver and PSU, £30. Carriage extra, s.a.e. with enquiries.
Hayward, Sunnyfields, Lighthouse Road, St. Margaret's Bay,
-
Dover, Kent.
-
Selling: Jaybeam 10-element Parabeam, £15. Carriage extra.
Ring Williams, 0376-23604.
Volume XXXVIII
THE SHORT WAVE MAGAZINE
Pye Vanguard AM -25B, 2m. FM, with VXO, £32.
G8AEV-type 2m. converter, 4-6 MHz, £5.
Ring Liston Brown, G8GSL, 021-353 4759.
-
Sale:
Clearance: TA-33Jr Tribander, £40. Daiwa DR -7500 heavy
rotator and controller, boxed, as new, £70. ETM-2B keyer,
£20. AR-40 rotator and controller, £25. 8Y2M antenna, £7.
-
Woodings, G4HKE, 119 Hoo Marina, Hoo, Rochester, Kent.
ME3 9LE.
-
For Sale: Eddystone 640 receiver, £42. Eddystone 750 receiver,
£75. Buyers inspect and collect.
Nunn, Thartslock View,
Lower Basildon, Reading, Berks.
601
MORSE CODE
RECEIVING AND SENDING
Receiving: C-90 Cassettes
CASSETTE A For Amateur Radio examination preparation. Speed
slowly increasing from 1-12 w.p.m.
CASSETTE S For Professional examination preparation.
Computer produced morse from 12-24 w.p.m. Including
international procedure signs and symbols and their
incorporation into messages.
Sending:
Morse Key and Buzzer Unit for sending practice and own tape
preparation. Phone output.
Prices: each cassette, including booklets, £4.75.
Morse key and buzzer unit, £4.75.
Overseas Airmail £ 1. 5O extra
Prices include postage, etc.
-
M H ELECTRONICS (DEPT. 3)
12 LONGSHORE WAY, MILTON,
PORTSMOUTH PO4 BLS_
-
Selling: Volumes of "Short Wave Magazine" in Easibinders,
1958 to 1972 inclusive, £4 per volume plus carriage.
Ring
Jones, Porthcawl 5500 evenings.
CRAYFORD ELECTRONICS
G81WX
G8AYN
FLEXIBLE HELICAL AERIALS FOR HAND PORTABLES
Selling: Trio R-1000,
-
brand new, boxed, superb, best offer
secures. Send s.a.e. please.
London N22 4QX.
Peckett,
135
Palmerston Road,
For Sale: Collins R.390A Rx, 0.5-32 MHz, mechanical filters,
extremely stable, just about the best valve receiver ever made
Ring Langer, Warrington 572332.
and rare in UK, £600.
-
-
FRG -7 receiver, with SSB filter, manual, superb
condition, £150 or near offer.
Ring Thomas, High
Wycombe 35373.
Sale:
Selling: Sommerkamp FT-277ZD (same as Yaesu FT-101ZD),
10-160 metres, as new condition, 6 months old, bargain £475
or very near offer.
Ring Webster, 01-399 4949 (Surbiton).
-
Wanted: BC -221 wavemeter with charts and mains PSU.
Wray, 39 Blenheim Road, Basing, Basingstoke, Hants.
-
-
Selling: CW keyboard, 15 w.p.m. to unreadable, £65.
Box No. 5727, Short Wave Magazine Ltd., 34
(Norfolk).
High Street, Welwyn, Herts. AL6 9EQ.
condition, with circuit, £115.
KW -77 receiver, very good condition, with circuit, £50. (Herts)
Wave
Magazine Ltd., 34 High Street,
Box No. 5728, Short
Welwyn, Herts. AL6 9EQ.
Sale: KW -600 linear, excellent
-
For Sale: Grundig 'Satellit' 3400 communications receiver,
mains/battery, mint condition, 10 months old (cost £350),
Ring Hudspith, North
accept £220. Securicor delivery.
Shields 578828.
-
VHF-UHF
Frequency
70MHz (4m)
145MHz (2m)
Connector/Fitting
Price
£6.00
2BA, BNC, PL259
2BA, BNC, PL259, Pye PF70, 2200GX,
2300, IC215, IC202S
Right angle BNC, PL259, TNC
Storno 500, Pye Bantam
£4.20
£5.35
£5.00
£2.65
433MHz (70cm) 4BA (use on PFI)
BNC, min BNC, Pye PF70, 3200, Storno
£3.35
500
Prices inclusive of VAT and carriage, most items ex -stock. Many others
available, including commercial, marine etc.
BARCLAYCARD
ACCESS
SAE all enquiries
6 LOVELACE CLOSE, WEST KINGSDOWN,
SEVENOAKS, KENT TN156DJ
24hr Answer Service 047485 2577
R.A.E.
**
TUITION
**
R.A.E.
A five day course, leading from basic principles to
preparation for the Radio Amateurs Examination, is
available in the Georgian City of Bath. The tuition is
given by G3UWJ lecturer and private tutor in Amateur
Radio who, for ten years, has prepared numerous
students from the ages of 15 to 70+ who are now
licensed amateurs. The classes are essentially small so
that each student receives the required amount of
personal tuition to ensure that the syllabus is completed
in five days.
For further details please write, enclosing a S.A.E., to:
-
PETER BUBB
tuition
58 Greenacres, Bath, Avon, BA1 4NR.
ANTI-TVI TRAP DIPOLES
1980 Range:
Indoor models
Outdoor models
Tx-inel models
Shortwave Listener
£14.50 & £27.50.
£30.00 & £36.00.
£42.50, £52.50 &
£59.75.
HF receiver, CW filter, excellent condition,
£195 or near offer; or swap for micro -computer, or W -H -Y?
Ring Grabban, G4ENV, 01-205 9172.
Sale: FR -101S
-
-
For Sale: R.C.A. AR88 communications receiver, coverage
Ring
200 kHz to 30 MHz, with manual, £60 or near offer.
Barnes, Moretonhampstead (Devon) 06474-229.
Lists 10 x 8in 17p SAE. Aerial Guide 50p.
New Publication "Indoor and Invisible
Aerials for S.W.L.s"
£3.50.
G2DYM, UPLOWMIAN, TIVERTON, DEVON
602
November, 1980
THE SHORT WAVE MAGAZINE
Wehéword.
Enrol in TUTORCOURSE and well take you step by step
towards a full Amateur Radio Operator's Licence.
Clip the coupon and discover the world.
SAMSON ETM-3C
C-MOS KEYER
1µA battery drain
- Why switch off?
Can be used
Self -completing dots/dashes/spaces
either as normal electronic keyer or as an iambic mode
squeeze keyer 8-50 wpm Constant 3:1 dash -dot ratio
Plug-in PCB
Long
6 C-MOS ICs and 4 transistors
Built-in
battery life
typically 1 µA drain when idling
battery holder for 4x 1.5 v. batteries (but will work over
PCB has both a reed relay (250 v., 0.5
3-10 v. range)
amp., 25 w. max.) and a switching transistor (300 v., 30
Has the
mA max.)
either keying method can be used
well-known fully -adjustable Samson precision twin keying
Sidetone
lever assembly
Operate/Tune button
oscillator Grey case 4" x 2" x 6". ETM-3C, £65.30.
ETM-4C MEMORY KEYER: Has ETM-3C features plus 4 memories of
-
-
-
22 characters each (or 2 of 441. Erase/Rewrite memories as needed
Send CO's etc. by pressing button. (122.46.
BUILT FOR DEPENDABLE MARINE AND COMMERCIAL SERVICE
ZUTORCOURSE
Amateur Radio Operator
Pleasè rush me details of your.
AMATEUR RADIO COURSE
JUNKER PRECISION HAND KEY: A superbly engineered straight key
used for many years by professionals afloat and ashore. With this key
no screwing
you can't help but send good morse. Free-standing
fully adjustable gaps/tension. Key down. Front and back contacts
-
-
click filter. Hinged grey cover, £37.89.
Name
BAUER KEYING PADDLE: Single -paddle unit on 1%" s 2" base for
home -built El-bugs. Adjustable gaps/tensions, £13.85.
Address
88 mH TOROIDS: For CW, RTTY, SSTV and other filters, £1.15 each.
All prices post paid UK and include 15% VAT
Please send stamp with enquiries
SPACEMARK LTD.
Block Caps. Please
Post now, without obligation. to:
THORNFIELD HOUSE, DELAMER ROAD
ALTRINCHAM, CHESHIRE
(Tel: 061-928 8458)
SWT/l1
British National Radio
& Electronics School.
P.O.Box
I
Sb, Jersey, Channel Isles
G2BAR HAM BAND AERIALS
Price
inc. VAT
2 metre Folded Dipole YAGI
£7.48
5/FD. 5 element square section boom
£10.35
S'FO. 8 element reinforced boom
2metre'J' Pole
1/JP. Yo wave matching sections, enclosed connectors
£6.90
with half wave radiator, 15mm square elements
2 metre Stacked Colinear
£16.10
Vertical 'J' matching section, enclosed connectors
70ems. Folded Dipole YAGI'e
£ 6.90
6/FD. 6 element square section boom
£10.93
11/FD. 11 element reinforced boom
HF. Y. wave Mono Band Verticals with insulator and
ground post sections
10/HFV. 10 metre vertical, 3 sections of telescoping
£9.78
tubing dia. 1" to %"
15/HFV. metre vertical. 4 sections of telescoping
£11.20
aluminium dia. 1" to %"
20/HFV. metre vertical. 6 sections of telescoping
£13.23
aluminium tube dia. 1%" toY"
HF Band Dipole. Reflector Director Elements Only
10 metre Mark Y. wave element 7 sections of
(9.78
aluminium telescoping tube dia. 1" to %"
15 metre Mark I1 Y. wave element 9 sections of
£12.08
aluminium telescoping tube dia. 11/4" to %z"
20 metre Mark 11 Yr wave element 7 sections of larger dia./
£14.65
lengths of telescoping tubing 1Y." to %"
2 element YAGI Beams
Driven and Director elements. Boom to element clamps
Tubular Gamma Match tuning unit supplied.
£31.68
10 metre
element array
£39.80
element array
15 metre
£49.45
20metre-2 element array
Well designed and constructed
£460
Boom to Mast. bracket plate. 4U Bolts
Trapped Vertical Y. wave 300 watt
metres.
Tuned
Traps
10- 15 and 20
Slim Line
£28.18
Telescoping Aluminium Elements for easy adjustments
metre
15
Double 'J' Pole Vertical for 10
-
15mm
square
section
-20
- aluminium
tubing
FTG010M
FTGO1D
£800.00
£710.00
£585.00
FT225R
CPU2500RK
FT227RB(St)
FT207R
FT202R
£1.15
£1.15
FT301D
FP301D
FT1012D
FT1012
FT707
FT7B
£1.15
FR101S
FRG7000
£600.00
£395.00
£327.00
FRG 7D
£235.00.
FP12
FP4
SP901
SP101
FRG7
£185.00
£130.00
£169.50
YD148
YD844
Y0846
£1.15
£3.45
£1.15
FT2006/FP200
FP10100
FL110
£14219
£575.00
£500.00
YC500J
£455.00
£375.00
£346.96
YC601
YP150
FP707
£455.00
£308.00
£247.83
£173.05
£1013.48
£166.50
£110.00
£55.00
£95.00
£67.00
£35.00
£24.00
£19.00
£18.50
£18.00
£7.50
£1.15
Y0101
£1.15
SWAN UK APPOINTED DEALERS FOR THE
SOUTH-WEST
£1.15
£2.30
ASTRO 1028X
ASTRO 150
100MX
£400
£4.00
£400
£1.15
£4.00
£20.70 £400
Individual Y. waves. Single 50ohm feed
Now even better value please send .3(k. stomps for literature and news
UPPINGTON TELE -RADIO (BRISTOL) LTD.
12-14Pennywell Road, Bristol BS5OTJ. Telephone: 0272 557732.
-
YAESU
£1.15
£1.15
11
-2
-2
REG WARD £t CO. LTD G2BSW
P.P.
£693.91
£533.04
£363.48
PSU 6 (for 102)
PSU S (for 150/1001
ST3 ATU
£ 123.48
£117.39
£106.09
KDK FM202SE £217.39
Valves: Most types available. Ali valves for Yeasu and KW equipment
stocked. We also stock: Shure microphones, Hy-Gain, Jaybeam, Ascot,
Cushcraft. Agents for G2DYM Antennas. SEM equipment. Rotators and
Rotator control cable. Co -ax and Twin Feeders. 'Co-ax' and Antex
Antenna Switches. Aerial Wire and Hardware.
HP Available. Carriage extra. Add 15% VAT to all prices. Please check
prices and availability before ordering.
ACCESS/BARCLAY CARD/TRUSTCARD.
GEORGE STREET, AXMINISTER, DEVON. EX13 5DP.
Telephone: 33163 (Std 0297).
603
THE SHORT WAVE MAGAZINE
Volume XXXVIII
CREATE YOUR OWN
REFERENCE LIBRARY
The "EASIBINDER" is designed to bind
12 copies of the Magazine as you
receive them month by month,
eventually providing a handsomely
bound volume for the bookshelf.
No need to wait until twelve copies are
assembled. As each copy is received, it
is quickly and simply inserted into the
binder. Whether partially or completely
filled, the binder is equally effective,
giving the appearance of a book, with
each page opening flat.
Strongly made with stiff covers and
attractively bound in maroon Rexalon
and Milskin, the binders have only the
title gold -blocked on the spine and the
date frame.
Price £
2.70
(incl. P&P)
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SHORT WAVE MAGAZINE
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Subscription rate to Short Wave Magazine is f6.60
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BETTER
SHORT WAVE
RECEPTION
Orr W6SAI and Stuart D. Cowan W2LX
4th Edition
In the latest edition of this excellent work for all those
who own (or intend to own) a radio receiver, these two
well-known and respected writers have produced
chapters covering: the radio spectrum and what you can
actually hear world-wide; the tuning of a shortwave
receiver; the business of buying a receiver, both new and
secondhand; a description of the SW Rx in non -technical
terms, together with receiver adjustment and alignment;
DX-ing above 30 MHz; a description of the VHF receiver;
building and adjusting efficient aerials; reception
techniques.
Thoroughly readable and "digestible", this book is
without doubt a very valuable addition to the bookshelf
of any SWL.
inc. post
160 pages
by William
I.
f 3.00
SIMPLE, LOW-COST
WIRE ANTENNAS
by William Orr, W6SA1
This excellent and thoroughly recommended handbook
is the publication on the practical approach to building
aerials. After starting with aerial fundamentals there are
discussions and descriptions of ground -plane, end -fed,
DX dipole, vertical and wire beam antennas, plus
coverage on a universal HF antenna system and working
DX with an "invisible aerial"; the SWR meter and coaxial
cable also have chapters to themselves.
The whole book is presented in an authoritative,
immensely clear, readable and enjoyable manner with
to the
the emphasis on the practical throughout
extent that even the chap who can hardly strip a piece of
co -ax need not feel at all left out! Just as practical for the
SWL, too!
inc. post
192 pages
-
£
a 95
Order from
Publications Dept.
Order from
Publications Dept.
Short Wave MagazineAL6Ltd.
9EQ
34 High Street, Welwyn, Herts.
Short Wave Magazine Ltd.
34 High Street, Welwyn, Herts. AL6 9EQ
THE SHORT WAVE MAGAZINE
604
gre
e, O,e,O,etie,,....,O-,O,e,O,.... ,,er,er.,e' .e,0,o,,e,,e,0,e,0,e,0... t0,...,0,e,ee, O,e,01e,0,e,''
Have you got all- these ARRL titles
on your shelf? .. .
£5.00
£3.25
£3.60
£3.65
£2.80
£3.20
£7.65
£2.75
£2.85
£2.85
£2.95
£3.30
£1.70
£2.15
£2.20
£3.25
£3.35
Solid State Design for the Radio Amateur
Electronics Data Book
Antenna Book, 13th edition
Understanding Amateur Radio
A Course in Radio Fundamentals
FM and Repeaters for the Radio Amateur
The Radio Amateur's Handbook 1980 (soft cover)
i
it
i
ijj
Antenna Anthology
Specialised Communications Techniques for the Radio Amateur
e
Hints and Kinks
Single Sideband for the Radio Amateur
VHF Manual
Learning to Work with Integrated Circuits
Weekend Projects for the Radio Amateur
Radio Frequency Interference
$
0
I
1
a
j
Satellite Communications
Solid State Basics for the Radio Amateur
(all prices include post/packing)
Available from SHORT WAVE MAGAZINE
Publications
34 HIGH STREET, WELWYN, HERTS. AL6 9EQ. Telephone: Welwyn 5206/7.
i
s
I
November, 1980
a
DX ZONE MAP
New 9th Edition!
-11
four colours, on durable paper for walls
mounting, 33% in. wide by 24'1/2 in. deep. Giving
essential DX information bearing and distance
,of all parts of the world relative to the U.K., the;
Zone areas into which the world is divided for
Amateur Radio purposes, with major prefixes'
I. listed separately. Distance scale in miles and®
Time scale in GMT. Marking of;
NI kilometres.
KLat./Long. close enough for accurate plotting.L
Hundreds of place names, mainly the unusual.
ones, and most of the rare islands.
corrected to August 1980
s,,e,.
CALLBOOK
1980
In
h.
-
DX Listings £ 9.65
U.S. Listings £ 10.15
.
4tPrefixes
1
k
Price £3.35
The above prices include postage and packing
including postage and special packing in
postal tube to avoid damage in transit.
Publications Dept.
Short Wave Magazine
Short Wave Magazine Ltd.,
34 High Street, Welwyn, Herts. AL6 9EQ
34 High Street, Welwyn, Herts. AL6 9EQ.
Tel: Welwyn (043871) 5206/7
'eIAI/ IAIAVAT4IVAIA0II
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Dept.,ii
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I//IIr///IAIArAr
"SW
.
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Publications Dept.,
Tel: Welwyn (043871) 5206/7
j
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1
THE SHORT WAVE MAGAZINE
Volume XXXVIII
ll!
and Manuals
Technical Books
AND AMERICAN)
(ENGLISH
AERIAL INFORMATION
£4.10
£7.00
£3.15
£3.15
£3.95
£4.00
£4.00
£3.60
£2.75
£4.35
Antenna Handbook (Orr and Cowan)
Practical Aerial Handbook, 2nd Edition (King)
Beam Antenna Handbook
Cubical Quad Antennae. 2nd Edition
Simple Low Cost Wire Antennas, by Orr
73 Vertical Beam and Triangle Antennas (E. M. Noll)
73 Dipole and Long -Wire Antennas (E. M. NoII)
Antenna Book (ARRL) 13th Edition
The ARRL Antenna Anthology
Two -metre Antenna Handbook, F. C. Judd G2BCX
BOOKS FOR THE BEGINNER
Questions and Answers on Amateur Radio, by
Judd G2BCX
F. C.
Elements of Electronics, Book i
Elements of Electronics, Book 2
Elements of Electronics, Book 3
Solid State Short Wave Receivers for Beginners
(R. A. Penf old)
Beginners Guide to Radio 18th Edition)
Beginners Guide to Electronics
Beginners Guide to Microprocessors and Computing
Course in Radio Fundamentals, ARRL
Guide to Amateur Radio (new 18th Edition) (RSGB)
Ham Radio (A Beginners Guide) by R. H. Warring ...
Morse Code for the Radio Amateur (RSGB)
Understanding Amateur Radio (ARRL)
Radio Amateur's Examination Manual, 8th Edition
.
(newsyllabus) RSGB
£2.05
£2.50
£2.50
£2.50
£ 1.50
£3.70
£3.35
£2.05
£2.80
£2.95
£3.95
£1.20
£3.65
£2.70
GENERAL
How to Build your own Solid State Oscilloscope
(Rayer)
Projects in Radio and Electronics (Newnes)
How to Make Walkie Talkies (Rayer)
How to Build Advanced Short Wave Receivers
(Penfold)
Better Short Wave Reception, 4th Edition
FM & Repeaters for the Radio Amateur (ARRL)
Easibinder Ito hold 12 copies of "Short Wave
Magazine" together)
Amateur Radio Satellites
Oscar
World Radio & T.V. Handbook 1980 Edition
-
World DX Guide
Guide to Broadcasting Stations (new 18th Edition)
Radio Stations Guide
Long Distance Television Reception (TV -DX) for
£1.40
£3.00
£3.20
£2.70
£4.30
£9.40
£5.40
£3.40
£1.75
O/P
the Enthusiast
Solid State Basics for the Radio Amateur (ARRL) ...
Counter Driver and Numeral Display Projects, Rayer
Weekend Projects for the Radio Amateur, ARRL ...
£1.75
£2.60
£1.50
.
.
.
£3.35
£2.05
£2.15
Electronic Test Equipment Construction (Bayer)
Power Supply Projects (Penfold)
.
.
£2.05
£2.05
HANDBOOKS AND MANUALS
Radio Communication Handbook, Vol
1
(5th
£9.75
Edition) (RSGB)
Radio Communication Handbook Vol. II (5th
£8.40
Edition) (RSGB)
£1.60
TVI Manual (2nd Edn.) (RSGB)
Radio and Electronic Laboratory Handbook by
£ 19.05
Scroggie-Johnstone, 1980 (9th) Ed
£3.55
RTTY Handbook) 73 Magazine)
£3.55
Slow Scan Television Handbook I 73Magazine)
Specialized Communications Techniques for the
£2.85
Radio Amateur (ARRL)
Working with the Oscilloscope
The Radio Amateur's Handbook 1980 (ARRL) soft
cover
The Radio Amateur's Handbook 1980 (ARRL) hard
cover
Shortwave Listener's Handbook
Learning to Work with Integrated Circuits (ARRL) ..
Weather Satellite Handbook
Single Sideband for the Radio Amateur (ARRL)
Test Equipment for the Radio Amateur (RSGB)
Amateur Radio Operating Manual (RSGB)
Satellite Communications (ARRL)
USEFUL REFERENCE BOOKS
Solid State Design for the Radio Amateur (ARRL)...
Foundations of Wireless and Electronics, 9th
Edition (Scroggie)
Amateur Radio Techniques, 6th Edition (RSGB)
U.K. Call Book 1980 (RSGB)
Hints and Kinks (ARRL)
Radio Data Reference Book (RSGB)
Electronics Data Book (ARRL)
Radio Frequency Interference (ARRL)
Amateur Radio Awards, RSGB
VALVE AND TRANSISTOR MANUALS
Towers' International Transistor Selector
Edition (Up -Date No. 2)
Radio Valve and Semiconductor
Edition)
Data
£4.05
OIS
OIS
£3.30
£1.70
£2.90
£2.95
£4.50
£4.80
£3.25
£5.00
£5.40
£4.00
£3.80
£2.85
£3.65
£3.25
£2.20
£3.40
1980
£10.40
110th
£4.35
VHF PUBLICATIONS
VHF Handbook, Wm. 1 Orr
VHF Manual (ARRL)
VHF/UHF Manual (RSGB) 3rd Edition
O/P (Out of print)
THE ABOVE PRICES INCLUDE POSTAGE AND PACKING
O/S (Out of stock)
Many of these titles are American in origin
£4.00
£3.30
£7.20
(Terms C.W.O.)
Prices are subject to alteration without notice.
Available from
SHORT WAVE MAGAZINE
Publications Dept.
34 High Street, Welwyn, Herts. AL6 9EQ
(Counter Service. 9.30-5.00 Mon. to Fri.)
-
Welwyn (043871) 5206/7
(GIRO A/C No. 5476151)
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TRANSCEIVERS ETC.
..
We reckon we're offering the
e5
LOWEST YAESU PRICES
c.e
r
etssee
our
BARGAIN
Shopping List!
Try phoning us for your personalised quote with or
without Partridge antennas.
For example:
- only £795.00 FT101ZD - only
FT7B - only £395.00
£559.00
FT901DM
If you
take
Partridge products as
part of
a
"Package" deal you'll save even more!
ANTENNAS
THE JOYSTICK VFA
The MICROSCOPIC 230Cm GIANT Joystick VFA
Simple, rapid erection
(Variable Frequency Antenna)
not only 6-band but CONTINUOUS 0.5-30MHz. incl BC
Substantially Harmonic FREE
Omni -directional
Poor QTH's
million miles per watt, world record!
QUOTE from RADIO ZS (South Africa) "A
enhanced!
remarkable antenna with great possibilities. Its physical size
makes confined space operation a practical proposition."
Includes matching ATU
VHF BUSINESS
RADIO
We can help! Just phone or send stamp.
1
SYSTEM
"A"
For the SWL or 160 m. Tx,.
£40O .55
Access
Buy it with Access
NEW JOYMASTER SYSTEMS
Amateur Bands 3.5-30MHz
System "J" has been
superseded by our IMPROVED JOYMASTER SYSTEM
SYSTEM "JM3" is a NEW DEVELOPMENT for
"JM2"
THE HIGH-RISE
the PRISONER OF CIRCUMSTANCE!
BLOCK DWELLER'S DREAM!
Can be co -ax fed at a
distance.
SYSTEM
Includes matching ATU
SYSTEM
Includes matching ATU
"JM2"
JM3
*Does not include
500.v.p.e.p.
£69.00
£90.00*
50 ohm coax cable where required to
feed remotely located JOYSTICK VFA.
JUST TELEPHONE
YOUR CARD NUMBER
0843 62535 (Ext. 4) (62839 after office
hours) or send 12p for FREE literature. Prices
correct as at press. NOTE our prices are always
INCLUSIVE OF VAT, carriage. Prompt service
too, goods usually despatched WITHIN 48
HOURS!
V""
TR/OL
.YFXI
ROgO5INlA5 KENT
ENGLANO
F/l6[/70AOSTN/RS
LECT/ION/C
RECEIVERS
FRG7
COMPLETE
FRG7000
RECEIVING
STATIONS
-
ASSEMBLED IN SECONDS!
FRG7 + free wire aerial ONLY £187.00
7000 + free wire aerial ONLY £299.00.
FRG
Package "R.1." (FRG7 + ATU + World Record
Package
VFA and FREE HEADPHONES) £218
"R.2." (FRG7000 + ATU + World Record VFA and
FREE HEADPHONES) £331.00.
4 Partridge House, Prospect Road,
Broadstairs, Kent CT10 1LD
(Callers by appointment)
G3CED
G3VFA
-
Wave
Printed by K&SC (Printers) Ltd., Tunbridge Wells, for the Proprietors and Publishers, The Short Wave Magazine Ltd., 34 High Street, Welwyn, Herts AL69EQ. The Short
Gordon &
Magazine is obtainable through the following: Continental Publishers & Distributors Ltd.,.William Dawson & Son Ltd.; AUSTRALIA AND NEW ZEALAND
1980.
November
International News Company, 131 Varick Street, NEW YORK. Registered for transmission to Canada by Magazine Post.
Gotch Ltd.; AMERICA
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