DRAKE TR5 Instruction Manual

 TRS
H. F. TRANSCEIVER
INSTRUCTION
MANUAL
SECTION |
1-1;
1-2.
1-3.
SECTION II
2-1.
2-2.
2-3.
2-4,
SECTION III
3-1,
3-2.
3-3.
3-4.
3-5.
3-6.
3-7.
3-8.
3-9.
SECTION IV
4-1.
4-2.
4-3,
4-4,
SECTION V
5-1.
5-2.
5-3.
5-4.
5-5.
2-6.
Of,
5-8.
TABLE OF CONTENTS
PAGE
PRG RE TE A eae 1-1
DOOR usa a A EA AR ARS 1-1
SOCIO ia A a RE 1-2
A A a aie ИЕ 1-3
АЕ очен a 2-1
a анна 2-1
О IA a 2-1
НЕ OO 2-1
Pio OA MON een 2-3
A o RR AT REISTE 3-1
Front Panel Controls and Conmections ............oooe.oo.oomooomoonrsarsros 3-1
Rear Panel Controls and Connections ...........» «===». orooionoroos.oss 3-2
Internal Controls and Adjustments .......<.oo. o. .o=oo.ooomeorerransn..o 3-3
Accessory Filter Installation <<" een sr ra 3-3
General Operating INTOMEON ...... «<=. secarconnanrr e 3-6
O CI a nn m RE Re 3-6
CIO ana m ana a ara Eee 3-7
Operation Near Band EM. a or ra 3-7
Operation with a Linser Amphfier .,.,..... ss ssesssssreausessesauanena 3-7
THECOAT OF OPERATION. a 4-1
CO its eur auto ne Mn Nina ed ue eo eh 4-1
Injection and Counter Circunty ss cere a 4-1
ОЕ БН ааа ера 4-1
о re ie wie coc eich ce eeu A A AA 4-2
Se a Oa eee oe A era ea 5-1
O = ae. Te sn een nan ae ALE 5-1
Top Cover Hemoval ....,.......,...,.,,..4.. oe ee id RATES 5-1
Bottom Cover Removal ............ ss ssssssesosseses PS tt sem 5-1
THEMEN rr A AAA AAA Eee eS 5-1
То ЕЛИ еее nenne nenn ees Paes 5-1
ANO PUDO nee ARA OA 5-1
PE INI aig icin E ele Hl 5-3
Alignment: On CANS HARDOS ¿ci a a a 5-4
Figure 1-1
Figure 2-1
Figure 2-2
Figure 2-3
Figure 2-4
Figure 2-5
Figure 2-6
Figure 3-1
Figure 3-2
Figure 3-3
Figure 3-4
Figure 4-1
Figure 5-1
Figure 5-2
Figure 5-3
LIST OF ILLUSTRATIONS
PAGE
TAS EL IEC cado ds 1-1
ТРОЕ СВАО aaa een 2-2
TRS Psat Pare GAC a eee ee ieee see ess: 2-2
TRS Mictophöne COnnseloh essen nn ar bee ees 2-3
Connecting the PS75 Power Supply and MS7 Speaker ..........«..«. «o. ..... 2-4
Connecting the AV75 Remote VFO and a Linear Amplifier .................... 2-4
E A лнаи 2-5
Front Panel Controls and Connections .......-0000.ccc0 renee eres wee ene nnes 3-1
Rear Panel Controls and Connections ......,..,...ssssesssssssesssrssrm 3-2
Adiusting TRS Sidetone Frequency ++ += nene ннны я 3-4
Relative Power Adjustment and Crystal Filter Installation ,.............,,..... 3-6
FRS OC CERN Re ree ee er uen estime A 4-5
ТРЕЕ ОР АИ a aaa adas 5-8
TRS DOME оса chee ee риа 5-9
TRS Scnemmnc CAROD En an
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ЗЕСТЮМ |
INTRODUCTION
Figure 1-1
1-1. DESCRIPTION
The TR5 is a solid-state, broadband, 85SB/CW trans-
ceiver which covers all amateur bands from 160
through 10 meters, including the new 12, 17 and 30
meter bands. The TR5 offers excellent sensitivity
and selectivity, high dynamic range, digital fre-
quency readout and full break-in CW operation.
A front panel switch allows the operator to select an
optional crystal filter independent of the MODE
switch. A wide range of optional crystal filter band-
widths are available, and installation of an accessory
filter can be accomplished in minutes. The standard
bandwidth is 2.3 kHz, and itis automatically selected
in transmit to insure proper signal characteristics.
A passive double balanced mixer is employed in the
receiver front end. This stage is preceded by a low
noise, high dynamic range bipolar rf amplifier to
provide good strong signal performance and weak
signal sensitivity.
The digital frequency readout of the TR5 is derived
from a true frequency counter to assure an accurate
display of operating frequency. In addition, the
tuning knob dial skirt is calibrated in 1 kHz incre-
ments to facilitate short frequency excursions.
TAS H.F. Transceiver
The transmitter of the TH5 features a rugged, solid-
state power amplifier section which has been de-
signed for continuous duty in the SSB and CW
modes. For more demanding duty cycles, such as
SSTV or RTTY, the Model FAT cooling fan is
available. The transmitter section also features very
low harmonic and spurious output, and is equipped
with automatic high VSWR protection.
The VOX GAIN and DELAY controls are conven-
iently located on the front panel, and full break-in
CW operation is obtained via a switch on the VOX
DELAY control. VOX operation can be disabled by a
front panel switch.
Other features include selectable AGC time con-
stants, receiver incremental tuning (RIT), provision
for an accessory noise blanker (NB5), and T/R
switching connections for an external linear am-
plifier and/or receiver.
The modular construction of the TR5 reduces service
time to a minimum. Each module is designed to
perform a specific function, and this feature, com-
bined with the open, accessible layout of the trans-
ceiver greatly simplifies any required alignment and
troubleshooting. Liberal use is made of cable con-
nectors, simplifying module remove!
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1-2. SPECIFICATIONS
GENERAL
Frequency Coverage:
Modes of Operation:
Frequency Stability:
Readout Accuracy:
Power Requirements:
Dimensions:
Depth:
Width:
Height:
Weight:
RECEIVER
Sensitivity:
Selectivity:
Ultimate Selectivity:
1.8-2.0*, 3.5-4.0, '7.0-7.5,
10.0-10.5, 14.0-14.5, 18.0-
18.5*, 21.0-21.5, 24.5-
25.0", 28.0-28,5*, 28,5-
29.0, 29.0-29.7* MHz.
("With accessory range
crystal). NOTE: See
Section 4 for additional
frequency coverage
information.
USB, LSB, CW
Less than 1 kHz drift
first hour. Less than 150
Hz per hour drift after
first hour. Leas than 100
Hz change for a + 10%
line voltage change.
+ 10 ppm + 100 Hz
13.6 VDC regulated, 2 A.
12-16 VDC unregulated,
0.8 V rms maximum
ripple, 15 A.
12,5 in. (31.75 cm),
excluding knobs and
connectors.
13.6 in. (34.6 em)
4.6 in. (11.7 cm)
excluding feet.
14 Ib. (6.35 kg)
Less than 0.5 LV for 10
dB S+N/N except less
than 1.0 uV, 1.820 MHz.
2.3 kHz minimum at -6
dB,
4.1 kHz maximum at -60
dB.
(1.8:1 shape factor)
Greater than 95 dB.
AGC:
Intermodulation:
(20 kHz or greater
spacing)
Intercept Point:
Two-Tone Dynamic
Range:
IF Frequency:
IF Rejection:
Image Rejection:
Audio Output:
Spurious Response:
TRANSMITTER
Power Input (Nominal):
Load Impedance:
Spurious and
Harmonic Output:
Intermodulation
Distortion:
Carrier Suppression:
Undesired Sideband
Suppression:
Duty Cycle:
S55, CW:
Key Down
(w/o FAT Fan):
Key down
(w/FAT Fan):
Microphone Input:
CW Keying:
Less than 5 dB output
variation for 100 dB
input signal change,
referenced to AGC
threshold.
(sreater than 0 dBm.
Greater than 85 dB.
5.645 MHz
50 dB, minimum.
60 dB, minimum below
14 MHz.
50 dB, minimum above
14 MHz.
2 watts, minimum @ less
than 10% THD (4 ohm
load).
Greater than 60 dB
down.
150 Watts, PEP or CW
50 ohms.
Greater than 40 dB
down.
Greater than 30 dB
below PEP.
Greater than 50 dB.
Greater than 60 dB at
1 kHz.
100%
30%, 5 minutes
maximum transmit
100%
High Impedance
Instantaneous full break-
in, adjustable delay.
1-3. ACCESSORIES
The following accessory items provide additional
operating capability and flexibility for the TRS, and
are available through R. L. Drake Company author-
ized dealers.
A.C. POWER SUPPLY PS75, MODEL 1570
Fixed station operation of the TR5 requires a power
supply capable of delivering 13.6 VDC regulated at 2
amperes and 12-16 VDC filtered at 15 amperes. The
PS75 power supply meets this requirement, and is
packaged in an attractive, vinyl-clad enclosure. The
interconnecting cables are long enough to allow
remote location (up to six feet) if desired.
SYNTHESIZED REMOTE VFO RV75, MODEL
1545
The RV75 Synthesized Remote VFO offers the
operator a high degree of frequency control flexibility.
The RV75 can be selected for transmit, receive or
transceive frequency control or can be turned off to
allow transceive frequency control from the TR5. In
addition, two programmable fixed frequencies are
provided in the RV 75. The highly stable synthesizer
offers 10 Hz resolution, and features automatic
variable rate tuning to allow rapid frequency change
and fine tuning with the same control, The unit 18
housed in an enclosure which is styled to match the
TR5, and is supplied with complete operating and
installation instructions.
NOISE BLANKER NBo, MODEL 1558
Provision has been made in the TR5 for plug-in
installation of the NB5 Noise Blanker. The NB5 is
useful in eliminating or reducing impulse noise
(such as ignition noise) and some other types of
interference (such as over the horizon radar), Receiver
dynamic range is preserved by the use of a crystal
filter in the NB5.
ANTENNA MATCHING NETWORK MN7%5,
MODEL 1540
The MN 75 Antenna Matching Network matches
long wire and coax fed antennas, and covers the
range 1.8-30.0 MHz. The optional Model 1510 B-1000
balun allows the use of balanced feedlines and/or
wide impedance range flexibility. The MN 75 handles
up to 200 watts of input power and features a built-in
rf wattmeter/VSWR bridge. A builtin antenna
switch allows the selection of up to 3 antennas from
the front panel.
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EXTERNAL SPEAKER MS7, MODEL 1531
The MS7 External Speaker 1s intended for use in heu
of the speaker built into the TR5 in fixed station
operation. The unit is housed in an enclosure whichis
styled to match the TH5 in appearance.
COOLING FAN FAT, MODEL 1529
Severe duty cycle applications of the TR5, such as
extended SSTV or RTTY transmissions require the
use of forced air cooling on the power amplifier heat
sink. The Model 1529 FA7 Cooling Fan fulfills this
requirement, and features quiet operation and con-
venient installation.
DESK MICROPHONE, MODEL 7077
The Model 7077 Desk Microphone is designed to
match the audio characteristics of the TRS. The unit
features a convenient desk stand and PTT or VOX
operation.
ACCESSORY CRYSTAL FILTERS
Several accessory crystal filters are available for the
TR5 as follows:
DRAKE
TYPE MODEL 6dBBW 60dBBW USE
SL300 7021 0.3 kHz 0.7 kHz CW
51500 7022 05 kHz 1.1 kHz CW
SL1000 7027 1.0 kHz 20kHz CWRTTY
SL1800 7023 1.8 kHz 3.6kHz SSB,RTTY
51.4000 7026 4.0 kHz 8.0 kHz AM
SL6000 7024 6.0kHz 120kHz AM
Any one of these filters can be easily installed in the
TRS AUX filter position.
SPEECH PROCESSOR SP75, MODEL 1553
The SP 75 Speech Processor is designed to provide an
increase in average power/readability of a single
sideband voice signal during weak signal, high
interference conditions. The SP75 is connected
between the microphone and microphone input of
the single sideband transmitter, thus requiring no
modification of the radió set. A front panel switch
allows the processor to be switched in or bypassed as
conditions warrant. Two additional inputs, such as
a tape playeror phone patch, may be switch selected
in place of the normal microphone input.
ELECTRONIC KEYER CW75, MODEL 1507
The CW75 Electronic Keyer can be used to provide a
keying function for virtually any type of transmitter
1-3
(cathode, grid-block or solid-state keying) as well as
a code practice aid. The unit is styled to match the
TRS.
The CW75 may be used with a straight key, semi-
automatic key (bug) or squeeze paddle. When used
with the latter, iambic operation is provided.
PHONE PATCH P75, MODEL 1520
The P75 is a hybrid phone patch for use with a
transceiver or receiver ‘transmitter combination. The
styling matches the TR5, The hybrid design nulls
the receiver audio at the transmitter audio connec-
tions to allow VOX operation if desired.
The receiver audio input and transmitter audio
output gain settings are adjustable by means of
front panel controls. Speaker and microphone
awitching as well as phone line switching are
controlled by the front panel on/off switch. This
allows the phone patch to be activated at any time
without connecting or disconnecting cables.
PORTABLE/MOBILE MOUNTING KIT MMK-7,
MODEL 1335
The MMK-7 provides the necessary brackets, mount-
ing hardware and cabling for mobile installation of
the TR5. In addition, a new cabinetis supplied which
features a built-in carrying handle.
NOTES:
1-4
2-1. UNPACKING
Carefully remove the TRS from the shipping carton
and examine it for evidence of damage. If any
damage is found, immediately contact the transpor-
tation company responsible for delivery of the unit
or return the unit to the dealer where the unit was
purchased. Keep the shipping carton and all packing
material for the transportation company to inspect.
The original carton and packing material will make
it much easier to return the unit, if necessary. Inspect
the packing material for any accessories or printed
matter before storing. Locate the registration card,
fill out immediately, and return to the R. L. Drake
Company to insure registration and validation of
the warranty.
2-2. LOCATION
The location of the TR5is not critical. However, care
should be taken to insure that adequate clearance is
provided to allow free circulation of air around the
power amplifier heat sink, Do not cover the vents on
top of the cabinet with books, papers, or other
equipment as overheating may result.
2-3. MOBILE INSTALLATION
An accessory mobile mounting kit, the MMKT, is
available for mobile installation of the TR5. The
MMK 7 contains all necessary hardware and cables
for mobile operation of the TR5, and also includes
detailed instructions covering installation and oper-
ation in a mobile or portable environment. The
MME7 also includes an alternator whine filter and
power line fuse for mobile applications.
The following paragraphs cover antennas, power,
microphone, and speaker requirements for mobile
installation.
2-3.1 ANTENNA REQUIREMENTS
Install the mobile antenna as recommended by the
antenna manufacturer. Connect a 50 ohm coaxial
cable from the antenna to the SO-239 antenna
connector at the rear of the TR5, Pay close attention
to the antenna manufacturer's instructions for tuning
and matching to insure proper operation of the TRS.
SECTION Il
INSTALLATION
2-3.2 POWER REQUIREMENTS
CAUTION
Operation of the TR5 with an incorrect
power source will result in serious damage
and may void the warranty.
Operating voltage for the TR5 is 11 to 16 VDC.
Voltages outside this range may either damage the
transceiver or cause improper operation. The nominal
recommended operating voltage is 13.6 VDC at a
current of 2 amperes in receive and 15 amperes peak
in transmit.
The rear panel power connector (P-404-AB) has a
mating receptacle (S-404-CCT) which is polarized.
See figure 2-1 for proper connections, and figure 2-2
for rear panel connector locations. Be sure to wire the
power connector exactly as shown to avoid damage
to the transceiver. [t is recommended that #10
stranded wire be used to wire the power connector
directly to the vehicle battery, and that a fuse or
circuit breaker rated at 20 amperes be installed in the
positive supply line close to the battery.
A defective generator or alternator diode may cause
excessive generator noise or alternator whine, Defec-
tive ignition wiring or components may result in an
undesirable level of ignition noise in the receiver.
Reference texts such as ARRL Handbook provide
additional details on treating these problems,
2-3.3 MICROPHONE REQUIREMENTS
Use a microphone with a flat frequency response.
The microphone should have a cardiod pattern to
reduce pickup from the back and sides. Connect the
microphone as shown in figure 2-3.
2-3.4 EXTERNAL SPEAKER
REQUIREMENTS
The TR5 has a built-in speaker. In high noise
environments, however, it may be desirable to employ
an external speaker located close to the operator. Use
of an external speaker automatically disables the
internal speaker.
DO NOT connect the TR5 to the speaker of the car
radio. Install a separate 4 ohm speaker capable of
handling at least 2 watts of audio. See figure 2-2 for
location of the external speaker jack, which accepts
a standard 2-circuit phone plug wired such that the
tip is ‘hot’.
2-1
Pin NO. Function
13 High current +13.6 Vdc
CINCH JONES (or equiv.) sr ae current +13.6 Vdc
5-404-CCT 16 Gnd
(Rear View)
204 Fuse
Vehicle
Battery
Figure 2-1 TRS Power Connection
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Figure 2-2 TR5 Rear Panel Connections
NOTE: PINS 1 AND 4 ARE
CONNECTED TOGETHER
INTERNALLY. —_
Figure 2-3 TRS Microphone Connection
2-4. FIXED STATION INSTALLATION
See figures 2-4 and 2-5 for examples of fixed station
installations.
2-4.1 ANTENNA REQUIREMENTS
The TR5 is designed for use with antenna systems
having a nominal impedance of 50 ohms. Care
should be exercised to reduce the VSWR of the
antenna system to the lowest possible value for best
operation. Ifthe VSWR exceeds 2:1, the transmitter
power output will be reduced to protect the output
transistors. When using antennas which do not
present a low VSWR, the use of a matching network
such as those manufactured by the R. L. Drake
Company is recommended. Additional information
on antennas can be found in reference texts such as
the ARRL Handbook.
2-42 POWER REQUIREMENTS
CAUTION
Operation of the TR5 with an incorrect
power source will result in serious damage
to the transceiver and may void the
warranty.
The PS75 A.C. Power Supply is recommended for
fixed station operation. [tis designed to accomodate
all operating requirements presented by the TR5.
See figures 2-4 and 2-5 for interconnection details.
For general information regarding power sources
other than the PS75, see section 2-3.2 of this manual.
243 MICROPHONE REQUIREMENTS
The R. L. Drake Model 7077 Desk Microphone is
recommended for use in fixed station installations.
The unit 15 supplied wired with a mating connector
for the TRS.
A high impedance microphone should be used, and
preamplified units are not recommended.
2-44 EXTERNAL SPEAKER
REQUIREMENTS
The TR5 contains a built-in speaker; however, this
speaker is located on the bottom of the radio. In
many installations, the built-in speaker output will
be blocked. In these instances, an externa! speaker is
recommended. The MS7 Matching Speaker is de-
signed for this application. See figure 2-2 for location
of the external speaker jack.
Ifa speaker other than the MS7 is used, be sure that
it is a 4 ohm speaker, capable of handling at least 2
watts of audio. The internal TR5 speaker is auto-
matically disabled when an external speaker is
connected.
2-45 VIEWING ANGLE
Refer to figure 2-6 for illustrations of viewing angle
options. In order to change mounting feet, remove
the bottom cover by removing the ten screws around
the edge of the cover. Carefully slide the cover off
toward the back of the TRS. Reinstall the cover by
reversing this process,
CAUTION
Be sure that all power is removed before
attempting any disassembly of the TR5.
Potentially lethal voltages are exposed when
the covers are removed. It is suggested that
all accessories be unplugged from the TR5
before attempting to remove the covers.
2-3
TO ANTENNA
MÓTE . BE SURE LINE VOLTAGE
— PROGAMMING 18 CORRECT
FOR TOUR INSTALLATION
L POWER CABLE
Figure 2-4 Connecting the PS75 Power Supply and MS7 Speaker
MS7
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NOTE: SE SURG LIME VOLTAGE | LINEAR AMPLIFIER
POONA pi SORMECT
FOR YOUR INSTALLATION |
=. PS75 |
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Figure 2-5 Connecting the AV75 Remote VFO and a Linear Amplifier
2-4
STANDARD р-
Fi STUD 10X 74x 5/8 LONG
SUPPLIED WITH UNIT
OPTIONAL
Figure 2-6 Viewing Angie Options
2-5
SECTION III
B y OPERATION
A CDEFGH |
Теа |
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Figure 3-1 Front Panel Controls and Connections
3-1. FRONT PANEL CONTROLS AND
CONNECTIONS
The following paragraphs describe all front panel
controls and connections, Refer to figure 3-1 for the
location of individual controls.
A. BANDSWITCH — Selects the desired band of
operation. The low end of each 500 kHz range is
indicated on the front panel.
B. METER — Indicates relative level of received
signals in receive mode, Indicates relative power
or ALC action in transmit mode.
NOTE
TR5 ‘S’ Meter readings may not agree with
other receivers due to differences in overall
gain distribution. Such discrepancies are
not indicative of relative sensitivity, and
should be ignored.
C. METER SWITCH — Controls the meter function
in transmit mode.
D.NB SWITCH — Enables the optional NB5 noise
blanker.
E. VOX SWITCH — Enables the VOX circuitry in
the SSB mode.
F. SPKRSWITCH — Controls either the internal or
accessory external speaker. Does not affect the
headphones.
G. BW SWITCH — Selects the optional crystal filter
in the receive mode.
H.RIT SWITCH — Enables the front panel RIT
control. A yellow LED indicator is turned on when
the RIT is enabled as a reminder.
L FREQUENCY READOUT — Presents a digi-
tal display of operating frequency to the nearest
100 Hz
J. VOX CONTROLS — Two VOX controls are
provided on the front panel as follows:
1. VOX GAIN — Adjusts the gain of the VOX
amplifier when the VOX switch is in the ON
position.
2. VOX DELAY — Adjusts the VOX release time
in all modes. A switch at full CCW rotation
enables the full break-in mode (QSK)in the CW
mode.
WARNING
Do Not operate SSB with the VOX DELAY
control in the QSK position. Distortion of
the transmitted signal will result.
3-1
K. RF GAIN — Controls the R.F. gain of the receiver.
Particularly useful when the AGC is disabled.
L. AF GAIN — Controls the receiver audio gain.
Turn fully CCW to turn off the TRS.
M.MIC/CW GAIN — Adjusts the microphone gain
in the SSB modes and the carrier level in the CW
and LOCK KEY modes. Clockwise rotation
increases the output level.
N.TUNING DIAL — Adjusts the frequency of the
transceiver. 1 kHz markings are provided on the
dial skirt for operator convenience.
0, RIT CONTROL — When the RIT switch in ON,
this control allows the receiver frequency to be
vaned over a nominal #3 kHz range without
changing the transmit frequency.
P. MODE SWITCH — Selects the desired mode of
operation.
©). AGC SWITCH — Selects fast (F), medium (М),
and slow (S) decay speeds. Also allows the operator
to disable the recerver AGC.
RK. HEADPHONES — Provides a connection for
headphones. Use of headphones does not mute
the speaker.
Ss. MIC JACK — Provides a connection for micro-
phone or other transmitter audio source,
ABCDE F G H Do
Figure 3-2 Rear Panel Controls and Connections
3-2. REAR PANEL CONTROLS AND
CONNECTIONS
A. PHONE PATCH IN — Allows convenient con-
nection of phone patch transmit audio. Can also
be used with other accessories, such as RTTY
terminal units.
B. PHONE PATCH OUT — Receiver audio output
for phone patch, As with A above, can also be
used for other purposes. This output is in parallel
with the receiver loudspeaker.
3-2
C.EXT RX — This jack is normally internally
jumpered to the RX ANT jack. If a separate
receiver is used with the TRS, its antenna input
can be connected to this jack, and the internal
jumper plug on the rear panel of the TR5 removed.
Due to the transmit/receive configuration neces-
sary for proper operation of the TR5, the EXT
RX jack connects to the main antenna through
the low-pass filter. Because of this, the operating
frequency of the external receiver should be equal
to or less than the frequency of the TRS.
D.RX ANT — This jack is normally internally
jumpered to the EXT RX jack. If a separate
receiver antenna is desired, it should be con-
nected to this jack and the rear panel internal
jumper plug removed. Reverse this process to
restore normal operation.
E. EXT MUTE — Allows automatic muting of an
external receiver. This line is grounded in receive
and open in transmit: check to be sure that the
receiver in use is compatible with such a connec-
tion. All receivers manufactured by the R. L.
Drake Company are compatible.
F, KEY — Connection for key or keyer for CW use.
Keyer should be capable of handling a positive
keyline of 10 VDC (2 1 ma. Keyers designed for
grid-block keying (negative voltage) will not
provide proper operation. Plug should be wired
so that the insulated tip is positive and the
sleeve is ground.
G. ANTI-VOX — Adjusts the level of receiver audio
output fed back to the VOX amplifier to prevent
VOX tripping on received signals,
H.SIDETONE LEVEL — Adjusts the level of the
built-in sidetone in the CW mode, The sidetone
level is independent of the front panel AF GAIN
control for maximum flexibility.
I. SPEAKER — Connection for an external 4 ohm
speaker rated at 2 watts or more, such as the
MS-7. Internal speaker is automatically muted
when the external speaker is connected. Plug
should be wired so that the tip is ‘hot’.
J. ANT — Accepts standard PL-259 coax fitting
for connection of the main antenna to the TR5.
K.GND — Connect to a good earth or water pipe
ground to insure proper operation of the TR5.
L. RV75 — Mates with P-308-CCT plug. Provides
all power, signal and control lines for the RV75.
M.PS7/75 — Mates with a S-310-CCT socket. VOX
relay and linear amplifier ALC connections are
available at this connector for use with acces
sories, When using the TR5 with either a PS7 or
PS75, these signals are available at the rear of
the power supply.
N.POWER INPUT — Mates with a S-404-CCT
socket. See figure 3-2 for power connections,
O, FAN — 120 VAC outlet for use with Model FAT
fan accessory. Switched by front panel on/off
switch when using either the PS7 or PS75.
==, NT > —
el a
ii
3-3. INTERNAL CONTROLS AND
ADJUSTMENTS
A. SIDETONE FREQUENCY — Refer to figure 3-3.
The CW sidetone frequency can be adjusted by
following the procedure detailed below.
WARNING
The removal of the bottom cover during the
following procedure will expose potentially
lethal voltages in the rear panel area of the
TRS. Extreme caution should be exercised.
Remove the bottom cover of the TR5 by removing
10 screws around the edge of the cover, Carefully
slide the cover off toward the rear of the radio. The
CW sidetone can now be adjusted by rotating the
indicated white variable resistor to achieve the
desired pitch. Be careful not to disturb other
controls, Refer to the alignment section of this
manual if any other controls require adjustment.
Reinstall the bottom cover with 10 screws.
B. RELATIVE POWER SENSITIVITY ADJUST-
MENT — The relative power meter sensitivity
has been set at the factory into a 50 ohm load. If
this setting does not satisfy individual installation
requirements, it can be adjusted.
Remove the cabinet from the TR5 by removing 8
screws, 4 on each side, and sliding it to the rear of
the radio. Refer to figure 3-4, and identify the
relative power sensitivity adjustment. Set this
control for the desired meter action, and carefully
replace the cabinet and 8 screws. Be careful not to
cisturb any other controls. Refer to the ahgnment
section of this manual if any other controls
require adjustment.
3-4, ACCESSORY FILTER INSTALLATION
Space has been provided in the TR5 for the installa-
tion of one accessory filter. To install the filter,
remove the cabinet by removing 8 screws, 4 on each
side, and sliding the cabinet toward the rear of the
radio. Refer to figure 3-4 and identify the IF Selec-
tivity Board. Remove this circuit board by unplug-
ging three connectors, removing four screws (one at
each corner) and carefully lifting it out of the radio.
Be sure that you do not disturb any other connectors
or controls in the process.
Install the accessory filter in the space provided.
Tighten both filter mounting nuts before soldering
the three pins to the board, Clip off the excess
lengths of filter pins after soldering.
3-4
SIDETONE FREQUENCY ADJ.
nn mm \ E en ER = и
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Figure 3-3 Adjusting TR5 Sidetone Frequency
IF SELECTIVITY BOARD
REL. POWER SENSITIVITY ADJ.
Figure 3-4 Relative Power Adjustment and Crystal Filter Installation
3-5
Reinatall the board by reversing the above procedure.
Check to be sure that all connectors are properly
oriented, and that no other connections or controls
have been disturbed prior to attempting to operate
the unit.
3-5. GENERAL OPERATING
INFORMATION
Because of the broadband design of the TRS, there is
no ‘tune-up’ required. It is desirable, however, that
the load presented by the antenna be between 25 and
100 ohme (2:1 VSWR or less). If this is not the case,
an antenna tuner can be used to provide the proper
match.
In order to provide a carrier output to check VSWR or
to adjust an antenna tuner, preset the front panel
controls as follows:
MODE: CW
BAND: On Desired Band
TUNING: Set to Desired Fequency
MIC/CW GAIN: Fully counterclockwise
AF GAIN: Power ON
METER: ALC
Rotate the MODE switch to the LOCK KEY position
and rotate the MIC/CW GAIN control clockwise to
get just enough output to give a full scale reading on
the VSWR meter of the antenna tuner or wattmeter
(10-20 watts). Follow the manufacturer's instructions
for adjusting the tuner, and be sure to observe the 5
minute maximum key-down time to avoid over-
heating the TR5 power amplifier. Rotate the MODE
switch back to CW to unkey the radio.
Once the antenna or tuner has been adjusted at
reduced power, the MIC/CW GAIN control can be
increased until the ALC meter starts to move up-
scale (full output). Adjustments can now be optimized
at full power, again observing maximum key-down
limits.
The ALC system in the TR5 is operative in both the
SSB and CW modes, and senses both forward and
reflected power. As antenna line VSWR increases,
the ALC will decrease the drive to the final amplifier to
protect the output transistors. Thus, with high
VSWR, The ALC meter will start to indicate at lower
power levels, indicating that this circuit is working.
3-6
3-6. SSB OPERATION
In the following discussion, it is assumed that the
TR5 has been matched to the antenna on the desired
band as described in section 3-5.
For single sideband operation of the TR5, preset the
front panel controls as follows:
MODE: On Desired Sideband
BAND: On Desired Band
TUNING: Set to Desired Frequency
MIC/CW GAIN: Fully Counterclockwise
RF GAIN: Fully Clockwise
AF GAIN: Set for Desired Audio Output
VOX GAIN: Fully Counterclockwise
VOX DELAY: At Minimum (NOT QSK)
VOX SWITCH ОМ
METER SWITCH: ALC
In addition, set the rear panel ANTI-VOX control
fully counterclockwise.
While speaking into the microphone in a normal
voice, increase the VOX GAIN control until the TR5
switches to transmit reliably with speech. Increase
the VOX DELAY control for the desired drop out
time. If necessary, adjust the rear panel ANTI-VOX
control to prevent received signals from tripping the
VOX. The use of a microphone with a directional
pick-up pattern will help to reduce undesired VOX
tripping.
Again, speak into the microphone in a normal voice
and increase the MIC/CW GAIN control until the
meter indicates 2-4 ‘S’ units of ALC action on voice
peaks. Additional increase of this control will not
increase power output, and may result in distortion
of the transmitted signal. If VOX operation is not
desired, place the VOX switch in the OFF position
and use the microphone PTT switch for transmit’
receive control.
On SSB, the TRS transmits and receives on exactly
the same frequency (RIT off). Therefore, be sure that
you have signals tuned in so that voices sound
normal before transmitting. Otherwise, you will not
be transmitting exactly on frequency. Once contact
has been established, the RIT control can be enabled
and used for minor receive frequency corrections.
The digital readout will show the operating frequency
on both receive and transmit, thus indicating when
reception and transmission are on different
frequencies.
3-7. CW OPERATION
To operate CW, connect a key to the rear panel KEY
jack. If an electronic keyer is used, connect it for
cathode keying; i.e., a positive keyline voltage. Wire
the keyer plug so that the tip is ‘hot’.
The TR5 uses shifted carrier CW. This system shifts
the transmit frequency by approximately 800 Hz
from the receive frequency. Therefore, to transmit on
the frequency of a recieved CW signal, the receiver
should be tuned to produce a beat note of 800 Hz. The
digital frequency display reads the transmit fre-
quency in the CW mode.
To receive CW signals, place the MODE switch in
the CW position. Tune in a CW signal for an audio
pitch of about 800 Hz and adjust the AF GAIN
control for a comfortable listening level. To transmit,
close the key and adjust the MIC/CW GAIN control
clockwise until the relative power meter stops 1n-
creasing. Increasing the control further will not
increase power output (due to ALC action), and may
result in undesirable keying characteristics. The CW
sidetone level is adjustable on the rear panel.
The TR5 uses automatic transmit/receive switching
in the CW mode. This means that it will automatically
transmit when the key is depressed and return to the
receive condition when the key is released. The delay
time from transmit to receive is adjustable with the
front panel VOX DELAY control, At minimum delay
(QSK position) the TR5 will operate full break-in at
speeds up to 50 wpm. Be sure that the VOX DELAY
control is fully CCW and switched into the QSK mode
for full break-in operation.
Manual transmit/receive switching in the CW mode
can be accomplished by connecting an external
switch to the push-to-talk circuit of the MIC jack.
3-8. OPERATION NEAR BAND EDGES
When operating near the edge of an amateur band,
be sure that the entire transmitted signal is within
the band. On SSB, be sure to use the sideband that
will be away from the band edge. On CW, the digital
readout reads the transmit frequency, but the oper-
ator should allow 100 or 200 Hz for possible alignment
error,
3-9. OPERATION WITH A LINEAR
AMPLIFIER
The TR5 will drive most linear ampliñers. However,
since the TR5 is rated at 150 watts PEP input, it is
doubtful that it would be worthwhile to use a linear
amplifier with a power input rating of less than 1000
or 2000 watts PEP. An amplifier with a tuned input
will present a satisfactory load to the TH5, See figure
2-5 for typical interconnections.
If the linear amplifier is of the grounded cathode
type with high impedance and/or high sensitivity
input, it will be necessary to install a resistive pad
between the amplifier input and the TRS. Such a pad
must present a 50 ohm load impedance to the TR5,
and must have adequate power dissipation capability.
Operation is exactly as described in previous sections.
Note that the linear amplifier must be capable of full
break-in operation in order for the TR5 to be able to
work properly in the QSK mode. Follow the instruc-
tions provided by the manufacturer of the amplifier
for tune-up and operation.
Care should be taken to avoid overdriving the linear
amplifier, If the amplifier has an ALC output, 1t can
be connected to the ALC input on the PS7 or PS75 to
prevent overdrive, provided that the amplifier in use
generates a negative ALC voltage.
The amplifier relay control line should be connected
to the appropriate connector on the PS7 or PS7o.
Note that one side of this line is ground; if the linear
in use requires an isolated set of relay contacts, a
separate relay will be required.
NOTE
Be sure that your amplifier presents a 50
ohm characteristic impedance in the stand-
by or bypass mode to avoid activating the
VSWR protection circuitry in the TR5 when
operating low power.
3-7
4-1, GENERAL
The TR5 is a 150 watt HF single sideband trans-
ceiver which covers the 160 through 10 meter ama-
teur bands. Full break-in CW operation is also
provided. The TR5 features digital frequency read-
out, all solid-state design and wide receiver
dynamic range. Some of the circuits are common to
both the transmit and receive functions. Refer to
the block diagram, figure 4-1, and the schematic
diagram, figure 5-35, as required to supplement the
following discussion.
4-2. INJECTION AND COUNTER
CIRCUITRY
The local oscillator injection signal in the TR5 is
developed by a premixer system. This system con-
sists of the permeability tuned oscillator (PTO), the
crystal oscillator module, and the premix/injection
filter module.
In the crystal oscillator module, Q1301 is a
grounded base oscillator. The frequency of the
oscillator is controlled by a crystal selected by
SW1301, and the output is tuned by L1301 in combi-
nation with C1310-1518. The crystal frequency is
always 11.1 MHz above the low edge of the desired
900 kHz range. For example, the crystal for the 80
meter band is 4.5 + 11.1 = 14.6 MHz. Series resonant
crystals are used, with a series resistance of less
than 30 ohms. The holder is type HC-25/U. The
output of the crystal oscillator is buffered by Q1302.
The output of the PTO is fed to the premixer
through CR1601 and CR1602. These diodes form a
switch which is controlled by Q1601, Q1602 and
U1601. When the RV75 Remote VFO is in use,
CR1601 and CR1602 are turned off and CR1603 is
turned on. This switching action provides the
necessary isolation between the two VFOs while
allowing them to run continuously to insure stable
operation. Receiver Incremental Tuning (RIT) con-
trol of the PTO is provided by U1602. R1614 allows
centering the PTO within the RIT range when the
RIT is off.
The PTO and crystal oscillator signals are applied
to a balanced mixer consisting of Q1402 and Q1403
in the premix/injection filter module. A balanced
mixer ıs used to provide adequate attenuation of
the crystal oscillator signal, thus reducing spurious
SECTION IV
THEORY OF OPERATION
outputs and responses to a minimum. The output of
the balanced premixer is buffered by Q1401, which
is configured as an emitter follower, and routed by
SW 1401 to the appropriate filter for the band in use.
The filters reduce the undesired premixer products
to acceptable levels, and the desired injection sig-
nal is routed through SW1402 to an impedance sta-
bilzing pad consisting of R1420, R1421 and R1422.
(11404 and Q1405 form a broadband amplifier to
bring the injection signal up to a level adequate to
drive the receive and transmit mixers.
A portion of the injection signal is routed to the
digital display module through R1426. Q1501 and
Q1502 are used to amplify the signal and isolate the
counter circuitry from the remainder of the TR5.
11506 and U1507 form a divide-by-eight prescaler.
This division is necessary to reduce flicker and
ambiguity in the 100 Hz digit of the display. The
prescaled input signal is counted by programmable
counters U1508-1513, and the result is displayed via
latch/decoder/drivers 01501-01505. The 10 MHz
digit is controlled by a bandswitch wafer, and is
wired to read blank, 1 or 2 as appropriate for the
band in use. Y1501 and [1518 are used to provide a
stable time base oscillator. This signal is divided
and processed by U1514, U1515, U1520 and U1504
to form the gate, latch and reset signals for control-
ling the counter.
The injection frequency is always above the operat-
ing frequency by an amount equal to the BFO fre
quency. The counters are programmed by a matrix
consisting of CR1510-CR1518 to digitally subtract
the BFO frequency from the count, resulting in an
accurate display of the actual operating frequency.
Since the BFO frequency changes with mode, a
matrix 1s required to generate a separate preset for
USB, LSB and CW/TUNE.
4-3. RECEIVER CIRCUITRY
Incoming signals from the antenna pass through
the bandswitched low-pass filter module, which
includes a reed relay antenna switch, to the rear
panel EXT RX jack. Ifthe rear panel jumper plugis
in place, the signals then pass through a high-pass
filter on the rear panel to eliminate broadcast band
responses. A separate receiver andor receive
antenna can be connected in this path by removing
the jumper plug and making the appropriate
connections.
4-1
The output of the rear panel high-pass filter is con-
nected to the receiver input of the BPF/RF ampli-
fier module, where it is routed through a diode T/R
switch and a master low-pass filter to one of nine
band-pass filters which are bandswitch selected.
The master low-pass filter is designed for a cut-off
of approximately 35 MHz, and is employed to
improve image rejection on the higher frequencies.
The output of the selected band-pass filter is con-
nected via the bandswitch to the input of Q701,
which is a high dynamic range broad-band RF
amplifier, The output of this amplifier is switched
to the receive output of the BPF/RF amplifier
module.
This signal is connected to the receiver input of the
TX/RX mixer module, where it is combined with
the output of the premix/ injection filter module to
create a 5.645 MHz intermediate frequency (IF) sig-
nal. This conversion is accomplished by a high-
level double balanced mixer consisting of CR&01-
CR804 and associated components. The output of
this mixer is amplified by a low-noise, high
dynamic range junction FET amplifier (Q801) to
insure adequate sensitivity and strong signal per-
formance. AGC is applied to this stage via (1803
and Q804 in the presence of strong received signals
to prevent receiver blocking. The IF signal is
further amplified by a large signal bipolar device,
(802.
The 5.645 MHz IF signal from the TX/RX mixer
module is connected to the input of the NB5 Noise
Blanker. When installed, the accessory NBS acts
on noise pulses prior to the crystal filter to prevent
ringing in the filter from stretching the pulses.
Maximum noise blanker effectiveness is thus
assured. If the accessory NB5 is not installed, the
IF signal is passed through an IF switching board
in the same location.
The output of the noise blanker or switching board
is fed to the IF selectivity module. This board will
accept one accessory filter in addition to the stand-
ard 2.3 kHz filter. These filters determine the over-
all bandwidth of the receiver, and are selected by
PIN diode switching controlled from the front
panel. Careful attention has been given to the
design of the switching circuits to minimize stray
coupling paths which would degrade the ultimate
selectivity of the receiver. The result is very high
rejection of unwanted off-channel signals.
Following the IF selectivity module, the 5.645 MHz
IF signal is routed to the IF module. Q1101, Q1102,
and 1103 amplify the signal, and a portion of the
output of Q1103 is used to develop an AGC control
voltage which is applied to Q1101, Q1102, and the
4-2
RX/TX mixer module for gain control. The same
AGC signal is used to drive the S-meter circuit to
provide signal strength information. AGC decay
time constants and on/off conditon are controlled
by a front panel switch.
The output of the IF module drives the audio/detec-
tor board. U1201 is a product detector, which mixes
the IF signal with the BFO to demodulate the SSB
IF signal. The resulting audio is amplified by
Q1201, and fed through the front panel AF gain
control to U1202, where it is amplified to a level
sufficient to drive a speaker. A second input to
11202 is provided for the CW sidetone, and a separ-
ate output is connected through R1224 for anti-
VOX operation.
The BFO signal is developed by a junction FET
oscillator, Q501. The output of this oscillator is buf-
fered by Q502 to prevent frequency pulling due to
load changes. Crystal Y501 is pulled to the correct
BFO frequencies by diode selected tuning networks
which are controlled by the front panel MODE
switch.
4-4. TRANSMITTER SECTION
In the transmit mode, audio signals from the MIC
jack are applied to the VOX/Exciter module, where
they are amplified and used to drive the VOX
(01402) and balanced modulator (U403). The VOX
circuit controls the T/R switching in the SSB mode
via Q401, Q402 and Q412-Q417. A PTT input is
provided for manual control. In CW, the key
switches Q411 on and off. Q411, in turn, controls the
T/R switching via CR411, keys sidetone oscillator
(9418, and provides a keying input to the BFO
module via CR415. CR414 allows the transceiver to
be placed in the tune, or LOCK KEY mode without
keying the sidetone oscillator. The VOX/ Exciter
module also houses the 10 volt regulator, consisting
of U401, Q403 and (4404.
In the SSB mode, the 5,645 MHz double sideband
output of the balanced modulator is routed through
the noise blanker to the IF selectivity module. The
signal is passed straight through the noise blanker
for interconnection purposes only. The IF selectiv-
ity module rejects the undesired sideband, using
the standard 2.3 kHz crystal filter. CR1001 and
CR1002 form an AND gate to force the selection of
the 2.3 kHz filter in the transmit mode.
The 5.645 MHz single sideband signal from the IF
selectivity module is connected to summing ampli-
fier Q1106 on the IF module. In the CW and LOCK
KEY modes, the balanced modulator is disabled,
and the BFO signal is shifted and applied to Q1106
via keying diode CR1107.
The output of the summing amplifier is connected
to a variable attenuator formed by CHR1104 and
associated components. This attenuator is con-
trolled by the ALC circuitry. The forward and
reflected outputs of the wattmeter circuit on the
LPF module and the front panel MIC/CW GAIN
control are connected to the ALC module. An input
for a negative-going signal from a linear amplifier
is also provided. ‘These signals are processed and
summed to create a controlling voltage for the
attenuator, thus regulating the transmitter drive
level. VSWR protection is accomplished in this
manner, as well as providing gain control to pre-
vent flattopping and overdrive.
The SSB/CW 5.645 MHz IF signal from the IF
module is connected to the transmit input of the
RAS TX mixer. U801 is used as a balanced mixer to
convert the signal to the desired operating fre-
quency. The balance control, R&S5, is adjusted to
null the injection signal in the mixer output, there-
by reducing transmitted spurious. Q805 amplifies
and buffers the mixer output, which is connected to-
the front end/BPF board. This module filters the
> his
transmit signal to reduce undesired mixer prod-
ucts, and amplifies the desired signal to a level
sufficient to drive the power amplifier module.
The power amplifier module consists of two boards,
the predriver and the power amplifier. Overall
module gain is set by R312 on the predriver board.
The driver (Q201/202) and final amplifier (Q203/
204) stages are operated in push-pull to reduce the
level of even-order harmonics, thus easing the
design requirements on the LPF module. Heavy
amounts of inverse feedback are employed in the
power amplifier to insure good linearity and stabil-
ity. Diodes CR303, CR201 and CR202 are thermally
bonded to the stages they control, thus allowing the
bias applied to these stages to track the heat sink
temperatures. This technique prevents thermal
runaway.
The output of the power amplifier is connected to
the LPF module to attenuate the harmonics devel-
oped in the power amplifier. The transmit signal
then passes through the wattmeter to the rear
panel antenna jack. CR104 and associated compo-
nents form a voltmeter to provide a relative output
indication. Meter sensitivity is adjusted by K105.
NOTES:
—=
IC
F
: = м ALC ges
= PF | EXCITER
REF |
A \ A. VOX
AFA
| JUMPE \ er |
\ alé | POWER | DET/ SPKR
\ AMPL , AUDIO Mo
= \
| HPF \ | a L i
\
\
ET | |
\ \ | AX Y Cw =
A | ВРЕ/ CAYSTAL we de
se A OR FILTER
Tx © NBS
| AGC |
Y
ALC _ » ATT.
a eee
ВАНО \ BPF/ COUNTER
4
ih DISPLAY
PREMIXER
Figure 4-1 TR5 Block Diagram
PTO
5-1. SERVICE INFORMATION
The R. L. Drake Company will check, align and
repair vour TR5transceiver at the factory on a time
and material basis. Warranty repair considera-
tions are described on the inside front cover of this
manual.
Please write or call the factory for authorization
before returning your unit for alignment and/or
service. Address your request for authorization to:
R. L. DRAKE COMPANY
540 Richard Street
Miamisburg, OH 45342
ATTN: Customer Service Department
Telephone: (515) 866-3211
WARNING
Extreme caution should be exercised
when the top and bottom covers are
removed. Primary line voltage is present
at several points, and can cause a lethal
electrical shock. Repairs and/or adjust-
ments should be made by a qualified
technician, Disconnect the power supply
from the TR5 before removing covers.
5-2, TOP COVER REMOVAL
Remove the four screws on each side of the bottom
of the top cover and remove the cover by sliding it to
the rear of the transceiver.
9-3. BOTTOM COVER REMOVAL
Remove the ten screws holding the bottom cover
and separate it from the chassis. Use caution, since
the internal speaker is mounted to the bottom
cover. Unplug the speaker cable from the rear panel
board if the bottom cover is to be completely
removed.
5-4. TROUBLESHOOTING
Careful consideration has been given to minimiz-
ing maintenance requirements in the design ofthe
TR5. Solid state equipment seldom requires realign-
ment, due to the low levels of heat generated during
operation. However, it is possible that a problem
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SECTION V
MAINTENANCE
might arise which cannot be resolved using the
alignment and troubleshooting information in this
chapter.
If this occurs, it is suggested that the TR5 be
returned to the dealer, or you may write to the Cus-
tomer Service Department at the address given in
paragraph 5-1. Be sure to describe the malfunction
in detail, including information regarding external
connections, control settings, accessories in use,
and serial number.
Before returning the unit for service, check the
power supply fuse, the internal fuse (on the rear
panel board), and all external connections. In addi-
tion, remove the top and bottom covers and inspect
all wiring harness connectors to see that they are
fully seated in the appropriate locations. The vol-
tage and signal level charts, used with the sche-
matic and block diagram, should be useful in isolat-
ing minor problems. However, no attempt should
be made to service the TR5 unless you are thor-
oughly familiar with electronic circuitry and ser-
Vicing techniques.
5-5. TEST EQUIPMENT
Alignment of the TR5 will require the following
equipment,
а. Ап 11 megohm input VTVM w/RF probe
b. A non-reactive 50 ohm dummy load, such
as the R. L. Drake DL-300,
c. An accurate wattmeter
d. A frequency counter
e. Án accurate signal generator (optional)
5-6. ALIGNMENT PROCEDURES
The following alignment procedure is structured in
such a manner that it may be entered at any point
and followed to conclusion. That is, if you are sure
that all adjustments preceeding those of interest
are correct, you may start at the section which is
applicable to the problem at hand. However, all
sections following the starting point should be
completed to insure proper operation. If any doubt
exists, it is recommended that the entire procedure
be executed. Refer to figures 5-1 and 52 for parts
location,
5-1
5-6.1 10 VOLT ADJUSTMENT
Using and accurate voltmeter, measure the voltage
on the 10 volt busa on the rear panel board. If
necessary, adjust R441 (blue) on the VOX Exciter
board for the correct voltage (10 + 0.25 volts).
5-6.2 BFO ALIGNMENT
Use an accurate counter in the following procedure
to insure proper frequency response.
a) Unplug the coax from the product detector
output of the BFO board. This connector is
color coded brown. Attach the counter to this
point.
bi Setthe MODE switch tothe LSB position, and
adjust L501 for 5643.6 kHz.
с} Switch to USB, and adjust C502 for 5646.4
kHz.
d) Switch to CW, and adjust C504 for 5645.8 kHz.
e) Switch to Lock Key, and adjust C505 Рог 5645.0
kHz. Be sure MIC/CW is fully CCW before
selecting Lock Key.
5-6.3 RECEIVER IF ALIGNMENT
This alignment should be necessary only when
parts on the IF/AGC or RX/TX Mixer boards have
been replaced.
a) Connect a signal generator to the antenna
terminal. Set the TR5 and the generator to the
same frequency.
b) Select the CW mode.
c) Adjust the signal generator for an S-meter
reading of 5-9,
d) Tune T1101, L1101, L1102 and T1102 on the
IF/ AGC board and L801 on the TX/ RX Mixer
board for maximum response, Keep the 5-
meter around S-9 by adjusting the generator
output,
5-6.4 PREMIAER ALIGNMENT
Perform this procedure exactly as described below.
Otherwise, birdies and spurious outputs may occur.
a) Tune the TR5 to 21.250 MHz.
b) Unplug the PTO coax from the front switch
board of the Premixer module.
с) Connect the RF probe to the case of Q1405, and
adjust R1410 for minimum output.
d) Reconnect the PTO coax, and adjust the pre-
mix filters as follows:
ADJUST FOR
FREQUENCY MAXIMUM
28.750 MHz L1418, L1420
24.750 MHz L1416, L1417*
21.250 MHz 1,1414, L1415
18.250 MHz L1412, L1413*
14.250 MHz L1410, L1411
10.250 MHz L1407, L1408
7.250 MHz L1405, L1406
3.750 MHz L14083, L1404
1.900 MHz L1401, L1402*
* Do not adjust if necessary range crystals are
not installed.
5-65 FRONT END ALIGNMENT
Be sure to observe the transmit duty cycle limita-
tions during the following procedure.
a) Connect a wattmeter and dummy load to the
TR5 antenna terminal.
b) Select the Lock Key mode, and use the MIC/CW
Gain control to adjust the power output to
approximately 30 watts (below ALC thres-
hold).
c) Peak the power output in accordance with the
following table, keeping the power output at 30
watts with the MIC/CW Gain. Be sure not to
overheat the power amplifier during this adjust-
ment.
ADJUST FOR
FREQUENCY MAXIMUM
28.750 MHz L721. L722
24.750 MHz L718, L720*
21.250 MHz L716, L717
18.250 MHz L714, L715*
14.250 MHz L712, L713
10.150 MHz L710, ТИ
7.150 MHz L707, L708
3.750 MHz L705, L706, L723, L724
1.900 MHz L703, L704*
* Do not adjust if necessary range crystals are
not installed.
5-6.6 TRANSMIT MIXER BALANCE
This adjustment can be ignored unless you have
reason to believe your radio is transmitting spur-
ious signals and/or you have made parts replace-
ments on the board. Follow the procedure below.
a) Remove counter/display assembly.
b) Remove TX/RX Mixer top shield.
с) Unplugthetransmit IF coax (coded blue) from
the board.
d) Unplugthetransmit drive coax (coded orange)
and connect the RF probe to the mixer board at
this point.
e) Set the BAND switch to 28.5 MHz and the
MODE switch to Lock Key.
р Adjust R835 (blue) on the mixer board for min-
imum voltage on the RF voltmeter. Return
MODE switch to CW.
e) Remove RF probe and reinstall cables.
h) Reinstall the top shield and counter/ display.
5-6.’ WATTMETER/ALC ADJUSTMENT
a) Attach the TR5 to a 50 ohm dummy load
through an accurate wattmeter.
b) Tune the unit to 14.250 MHz and place the
MODE switch in Lock Key.
с} Adjust the MIC/CW Gain control for 40 watts
of output power (below ALC threshold).
9) Attach the VITVM to the reflected input to the
ALC board (gray wire in the 3 pin connector).
e) Adjust C133 on the LPF module for a min-
imum VTVM reading. (C133 is accessible
through the rear panel, via the hole marked
NULL.
р Switch the MODE switch to CW, and the
BAND switch to 28.5 MHz. Remove the
VTVM.
e) Switch to Lock Key, and rotate the MIC/CW
Gain fully CW. Adjust R616 on the ALC board
for 50 watts of output. [f necessary, transmitter
gain can be increased with R312 (purple) on
the predriver board,
NOTE
In a properly aligned TR5, K312
should not be adjusted above the 2
o'clock position. Transmitter insta-
bility may result above this setting.
h) Check the maximum power output on other
banda, It should not exceed 90 watts.
5-7. PERIODIC ADJUSTMENTS
The adjustments described in this section can be
made at any time, and do not interact with any
other alignment procedures.
5-7.1 CARRIER BALANCE
a) Place the MODE switch in USB and depress
the PTT switch. Turn the MIC/CW Gain fully
CCW.
b) Turn in the signal on an external receiver
loosely coupled to the dummy load.
c) Adjust the red carrier balance pot (R482) for
minimum signal on the external receiver. Re-
peat on LSB, and adjust for best compromise
between LSB and LSB.
5-7.2 COUNTER TIME BASE
This procedure assumes that the BFO has been
accurately adjusted as described in section 5-6.2. If
there is reason to believe that the BFO adjustments
are in error, they should be repeated before this
adjustment is made.
a) Tuneineither WWY or an accurate signal gen-
erator for zero beat, using USB or LSB. Do not
use CW or 800 Hz error will be obtained. (If
WWW is used, zero beat when modulation is off
to insure accuracy.)
b) Adjust trimmer C1512 on counter assembly
until the display reads the correct frequency.
5-7.3 RIT CENTERING
a) Turn on RIT switch and set the RIT control at
center.
b) Tune in a signal on the TRS.
c) Turn off the RIT and adjust R1614 on the
RIT/PTO switch board until the same signal
is again in tune.
d) Switch the RIT on and off to verify that the
RIT is centered.
5-7.4 S-METER ADJUSTMENT
a) Turn K1127 (black) fully CCW.
b) Turn R1142 (white) fully CW.
с} Adjust R1132 (green) to give a positive indica-
tion of about one S-unit,
d) Adjust R1142 (white) for a 2 S-unit rise above
the setting obtained in step c.
e) Adjust R1132 (green) for zero meter reading
fl Turnthe RF Gain fully CCW and adjust R1134
(black) for S9 + 70 db.
g) Return the RF Gain to its fully CW position TR5 FREQUENCY COVERAGE
and note that the S-meter is still on zero. Read-
just R1132 (green) 1f necessary.
h) Adjust R1127 (black) CW to about 2/3 of the |
Coverage with
total CW rotation. If a signal generator 1s | New Crystal
available, set R1127 so that 50 microvolts on Bandswitch| Standard and/or |
1.5 MHz 1.8-2.0 MHz 1.5-2.0 Mhz
(any 200 kHz)
4.0 MHz 3.540 MHz 3.0-5.0 MHz
(any 500 kHz)
5-8. ALIGNMENT ON OTHER RANGES E |
NOTE: AVOID 5.0-6.5 MHz DUE TO 5.645 MHZ IF]
Due to the broadband nature of the output stage of |
the TRS, it is possible to cover frequencies other | 70 MbBz ОТАН ung
than those indicated by the bandswitch. This is 100MHz 110.0105MHz| 85-105 MHz
accomplished by calculating the proper range crys- | (any 500 kHz)
tal frequency for the desired 500 kHz range (see 14.0 MHz | 14.0-145 MHz | 10.5-15.5 MHz
section 4-2) and referring to the following table for | (any 500 kHz)
the proper bandswitch position. For example, if | 18.0 MHz | 18.0-18.5 MHz 16.0-20.0
operation from 3.0-3.5 MHz is desired, the range (any 1 MHz)
crystal required would be 3.0 + 11.1 = 14.1 MHz. | |
From the table, tbe crystal would База | ОЕ | A авы
place of the standard 14.6 MHz crystal supplied for 245 MHz |240-245 MHz | 22.0.26.0 MHz
80 meters, and the bandswitch placed in the 3.5 r
are (any 1.5 MHz)
puesto. 28.0 MHz
When changing ranges, the premixer alignment 28.5 MHz | 28.0-29.7 MHz | 2.6.0-30.0 MHz
(5-6.4) and front end alignment (56.5) procedures (any 2 MHz)
should be performed. 29.0 MHz | ime
TABLE 1
TYPICAL RECEIVER LEVELS
should be in USB or LSB receive, AGC on, with the RF Gain fully CW.
TYPICAL TRANSMITTER LEVELS
dummy load and observe the duty cycle limitations.
Circuit Test Point RF Voltage (RMS)
BFO Output to IF 05 Y
TX Mixer IF Input 10 У
TR Mixer Output 0.25 V
Predriver Input 0.25 Y
Predriver Output 35 Y
TR5 TYPICAL OPERATING CONDITIONS
The following typical data will help to isolate a receiver problem to a circuit board for repair. The TR5
Connect Generator To Frequency Level Required for 5-9
Antenna Terminal On Channel 30-100 Microvolts
RX Mixer Input On Channel 60-200 Microvolts
IF Selectivity Input 5645 kHz 400-600 Microvolts
[F/AGC Input 5645 kHz 250-450 Microvolts
The following typical levels will help to isolate a transmitter difficulty to a board or module for repair.
The TRS should be in Lock Key (transmit) on 14.250 MHz, with the MIC/CW Gain fully CW. Use a
TABLE 2
DC VOLTAGE MEASUREMENTS
The following DC operating voltages were measured with the TR5 configured as follows:
0 (GATE)
BAND: 3.5 BW: NORM MODE: USB
METER: ALC RIT: OFF RIT: 0
NB: OFF DELAY: QSK MIC/CW GAIN: FULL CCW
VOX: OFF AGC; F RF GAIN: FULL CW
SPKR: OFF
R Indicates Receive (PTT Open)
T Indicates Transmit (PTT Grounded)
REF. DES. DEVICE TYPE E B C
(1201, (4202 SRF2338 (Matched Set) R 0 0 13.6
Т 0 0.7 13.6
(1203, 09204 MRF455 (Matched Set) R 0 0 13.6
T () 0.7 13.6
Q205 EP487 R 0 0 0)
T 0.7 1.3 13.3
(0301 MPSH20 R 0 0 0
Т 2.1 2.9 13.3
(4302 MEF476 R 0 0 0
T 0 0.7 13.3
0401 IN 4402 R 13.4 12.6 13.4
T 13.3 13.3 О
402 2N3904 R 0 0.7 0
Т 0 0 13.3
(0403 2N 5986 12.7 13.3 10
(404 2N 3904 6.3 6.9 12.7
(4405 2N4126 10 9.9 0
(1406 MPS6521 0 () 0
Q407 245953 (ЕЕТ) 0 (GATE) 1 (SOURCE) 2.6 (DRAIN)
Q408 MPS6521 0.3 1.0 4.4
(9410 2N 3904 3.6 4.3 9.1
Q411 2N4402 R 1.5 8.6 0.5
T 3.1 3.3 0.3
Q412 2N3904 R () 0.55 8.7
Т 0 0.36 О
0413 2N 4402 R 3:9 9.6 0
Т 9.0 9.0 9.8
Q414 2N 3904 R 0 0.8 ()
T 0 () 9.9
(9415 2N 4402 | 9.9 9.1 9.9
Т 9.9 9.7 ()
(1416 MPS6521 R () 0 13.4
Т 0 0.7 0
(4417 TIP32 R 13,4 13.4 0
T 13.4 12.6 13.3
(418 MPS6521 0 (1.2 4.9
C420 MPSH20 R 0 0 0
Т à 5.7 9.5
9501 2N5950 (FET) 0 (SOURCE) 8.7 (DRAIN)
REF. DES. DEVICE TYPE E B C
502 MPSH20 3.3 4.2 7.6
4503 MPSH20 0 ( О
(0601 2N 3904 0 0 2.6
6701 2N5109 0.6 1.3 8.9
(801 J310 (FET) R 0 (GATE) 1.8 (SOURCE) 7.9 (DRAIN)
T 0 0 0
(0802 2N5109 0.6 1.3 9,4
(1803 MPS6521 KR 1.8 2.5 7.9
T О 0 0
(804 TIS153 (FET) В 08(G:£G) 26(SOURCE) 7.9(DRAIN)
T О 0) 0
Q805 2N4427 R 0 0 0
T 1.3 2 8.5
Q901 2N4402 R 0 1 0
T 9 8.3 9
REF. DES. DEVICE TYPE G: Gu D
Q1101 TIS153 R 1.3 2.3 1.9 9.6
T 0 0) О 0
01102 TIS153 R 1.3 2.3 2 9,5
T 0 (} 0 0
(1103 TIS153 В 0 2.3 0.5 9.8
T 0 0 0 0
(11104 TIS153 R 0.7 0.7 2.4 9.9
T 0) 0 0
| REF. DES. DEVICE TYPE E B C
| ©1105 2N4402 R 9.9 9.5 1.5
Т 0 0 0
©1106 2N/3904 R 0 0 0
T 2.0 3.2 “|
Q1201 MPS6521 R 0.2 0.8 5.1
T 0 О O
©1301 MPSH20 2.7 3.4 8.3
Q1302 MPSH20 3.0 3.8 8.6
(1401 MPSH20 0.9 1.7 6.4
©1402, ©1403 2N 5953 (FET) 0 (САТЕ) 0.6(SOURCE) 6.7 (DRAIN)
Q1404 MPSH20 0.7 1.4 6,9
Q1405 IN 4402 1.3 1.9 8.6
41501 MPSH20 0.4 1.1 1.6
©1502 9N 4125 4.2 3.8 2,7
1503 2N 3904 0) 0.3 2.4
Q1504 2N 3904 0 0.8 4.2
| Q1601 2N 3904 0 0 ge
| ©1602 2N3904 0 0 13.3
Q1701 2N3563 1.3 1.8 8.7
1702 2N5950 (FET) 0 (GATE) 1.6 (SOURCE) 7.2 (DRAIN)
5-6
rr = a = == pm =
ВЕЕ. PIN NO.
DES. TYPE 1 2 3 4 5 6 7 he) 9 10 11 12 13 14
U401 MC1723 0) 0 0 65 65 66 0 O 06 64 126 126 76 0
L402 1.M324 0 0 0 10.0 О 4.6 0 0 1.6 0 0 О O 0
U402 MC1496 28 22 22 28 09 63 0 55 0 55 0 62 0 0
1601 MC3401 0 0 0.4 04 О 0.4 0 0.3 () 0 0 0 0 6.0
U801 МС1496 В 0 0 () 0 0 0) 0 0 0 0 0 0 0 0
T 19 14 14 19 06 54 0 36 54 36 0 54 =O 0
U1201 MC1496 ae 25 25 32 10 70 0 60 0 50 0 70 =O ()
U1202 TDAZ002 06 06 0 6.0 12.6
U1601 MC14016 R 86 0 8 86 124 124 0 A 8 0 8 0) 0 126
E 8.0 0 # 8.0 12.4 124 A 8.6 A 8 4.6 0 О 126
01602 МС14016 R 3.6 3.56 356 46 94 0 0 36 356 36 36 94 0 94
T 86 38 46 36 34 0 0 36 36 36 356 0 9.4 9.4
5-7
IF R835 FRONT L801 R1410
e SELECT. BD. PANEL TX/RX
SW. BD. MIXER BD. XTAL OSC. BD.
> = MR E = = + | ¡5 | = + E == = =— = = = :
= = NN | == => = = = == ——— = => =
11418
11420
L 1411
L1410
L 1406
L1412
L 1405
L 1407
L 1403
PREMIXER
INJ,
11401
L1402
11404
11408
11413
11414
11415
11416
(1417
PREDRIVER
BD.
R 312
POWER
AMP
BD.
LPF
NJ. LPF
BD.
| 1 R105
La =$
LE 42 s
HEAR
L1102 af T0? R27 —A132 R1134 PANEL
ВО.
Figure 5-1 TRS Top View
5-8
— Sars
= Ё se eee ee
=a 1 ; u
u = LE 1
: u e A
BPF
AMP BD. R433 A441
L708 = Rieti
707 3 =
par | RT Pro
L713 эм во.
(712 : =
L722 =
ites + A482
L721 =
L718 =>
L706 ==
L717 et
L715 = TX EXCITER
L716 ===
L714 =
L723 ==
L703 —— ALC BD.
ee —
L724 —— R616
EN AUDIO
DET. BD.
BFO BD. C502 C504 L501 C505
Figure 5-2 TRS Bottom View
5-9
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