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_ MOTOROLA INC., COMMUNICATIONS D IWASION «
_ Mobile FM Two-Way
25 W RF POWER
Radio. .
2 ,
12 voc
GSP8S6640-A
AA
CONTROL
HEAD
MOTOROLA INC.
Engineering Publications
MOTOROLA
“T-POWER” MOBILE
FM TWO-WAY RADIO
25 W RF POWER
144-174 MC
12 VDC
SPEAKER
COMMUNICATIONS DIVISION
4591 W. Augusta Blvd.
Printed incU. S.A.
11/3/59-RCS
Chicago 51], Illinois
68P856640
Issue - A
SECTION
INDEX
DESCRIPTION
INSTALLATION
& OPERATION
TRANSMITTER
RECEIVER
POWER SUPPLY
MAINTENANCE
NOISE
SUPPRESSION
GUARANTEED PERFORMANCE SPECIFICATIONS
MODELS U43GGT-1000C Series
INSTALLATION Front Mount or Trunk Mount
FREQUENCY 144-174 mc
TRANSMITTER RF
POWER OUTPUT
25 watts minimum
TRANSMITTER
MODULATION
40F3: +15 kc for 100% at 1000 cps or
20F3: + 5 kc for 100% at 1000 cps
RECEIVER
SENSITIVITY
Less than 0.5 microvolt for 20 db quieting
50 ohms RF input impedance
RECEIVER
SELECTIVITY
-100 db at +15 kc (30 kc channel spacing)
-100 db at +32 ke (60 kc channel spacing)
RECEIVER MODULATION
ACCEPTANCE
+ 5 kc (30 kc channel spacing)
+15 kc (60 kc channel spacing)
Chassis mounted metering sockets on the transmitter and
receiver facilitate convenient metering of all circuits
essential to tuning and checking. A MOTOROLA portable test
set or a 0-50 microampere meter can be used for this purpose.
INPUT VOLTAGE 12 V DC Positive or Negative Ground
DRAIN
METERING
(TOTAL)
INTERMITTENT DRAIN Each crystal heater: 0.65 amperes
POWER SUPPLY Fully transistorized
WEIGHT Approximately 47 lbs. (including accessories)
; the - Mibasrs s: 1"
DIMENSIONS Trunk Mount: 6 high 3,¢ 9 7/8 wide x 19 1/4 long overall
Front Mount: 6" high x 9-7/8" wide x 20-3/4" long overall
The MOTOROLA 2-way radio equipment described in this
manual meets or exceeds all requirements for FCC licen-
sing, and is included in the FCC "List of Equipment Accep-
table for Licensing in the Radio Services other than Broad-
cast",
LICENSING
INFORMATION
Identification of ''Transmitter Type'' (KMTR TYPE) appears
on the equipment nameplate and is:
Lypée Number ici.) ste CC3012 (144-174 mc) for licensing
under FCC rule parts 10, 11, 16,
and 21.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE,
li
FOREWORD
PURPOSE OF THE MANUAL
This manual offers the serviceman complete
installation, operation, maintenance and service
information on the MOTOROLA 2-way radio models
described in it.
The manual will serve as a ready reference
for the experienced technician andalso as a step-
by-step guide for the inexperienced man.
For convenience and quick reference, the
manual is divided into separate sections. Each
section has complete alignment, service and
maintenance information on its chassis and/or
kits and includes its own diagrams, details and
parts lists. For example, the Receiver section
contains complete information on the receiver
models described in it. Installation and oper-
ation of the complete radio set are covered ina
separate section. All major section paragraph
headings and diagrams are listed for the service-
man's use in the Table of Contents.
THE “RADIO SET”
MOTOROLA 2-way radio equipment is pack-
aged as a radio set plus accessories. The radio
set is assigned a model number for identification
purposes. It includes the transmitter, receiver,
and power supply chassis in a single housing.
This modelnumber describes the package specifi-
cally. Use the model number in its entirety when
making inquiries about the equipment.
Example: U43GGT- 1000C - describes a
144-174 mc, 60 kc channel spaced
set with a 25 watt, one frequency
transmitter, and a transistorized
power supply.
It is evident that the model number is easier
to use and is more specific than a word descrip-
tion.
The accessories are identified by an acces-
sory group number which includes those other
items essential to completing the radio installa-
tion such as; antenna, speaker, cables, etc. Use
this number when referring to a specific group of
accessories.
Example: EA1100B - describes an accessory
group which includes a one-fre-
quency control head and micro-
phone, 12 VDC cable kit, installa-
tion kit for a 10-inch housing, roof
top antenna, and a speaker.
In addition to these model and group numbers,
Motorola has assigned identifiers to all chassis
and kits. These are for inventory and stock
control purposes and should be used by the ser-
viceman when requesting information on them or
when ordering replacements. Use the assigned
number identifiers. It will be to your benefit.
These are the only sure means of describing the
radio equipment and its many parts.
The radio set model number is metal stamped
on the equipment nameplate along with the trans-
mitter type number, serial number and type of
primary power. Chassis and kit numbers are
rubber stamped on the chassis or kit itself.
For the serviceman's use, breakdown cross
reference charts on radio set models and acces-~
sory groups are located inthe front matter section
of the manual.
PRODUCTION CHANGES
When production and engineering changes
are incorporated into the equipment, a revision
numeral is assigned tothe chassis or kit affected,
e.g.; TA237W becomes TA237W-1, with the first
revision. This chassis numbercomplete with re-
vision numeral is stamped on the chassis at the
time of production, and the revision numeral be-
comes an integral part of the chassis identifier.
A schematic: diagram number complete with
its issue letter is also stamped on each chassis.
This establishes direct correlation between the
chassis and its schematic. The schematic issue
is advanced each time a change occurs in the
chassis. The most recent issue is stamped on
the chassis.
INSTRUCTION MANUAL REVISION BULLETINS
Those changes which occur after an instruc-
tion manualis printed are covered by the Instruc-
tion Manual Revision Bulletins. These bulletins
give the reader complete information onthe change
including pertinent parts listing data from which
the instruction manual can be corrected.
NATIONAL SERVICE ORGANIZATION
Motorola provides a nation-wide service
organization to assure availability of reliable
iii
maintenance at alltimes. These privately-owned
and operated factory author-
ized service stations are
equipped and qualified to
handle complete installation MOTOROLA
of all Motorola two-way ra-
dio equipment. They are
also equipped and licensed
to make the frequency and
modulation measurements required by the FCC.
Each station has the precision test equipment,
stocks of replacement parts, and shop facilities
necessary to maintain your system to factory
specifications. Call on them for complete main-
tenance service! Consult your local telephone
directory for the address of the nearest Motorola
Service Station, or write to:
RADIO COMMUNICATIONS
National Service Manager
Motorola Communications and Industrial Elec-
tronics Inc., 4501 W. Augusta Boulevard,
Chicago 51, Illinois
REPLACEMENT PARTS ORDERING
MOTOROLA maintains parts and service
depots in Dallas, Texas, and Burlingame, Cali-
fornia, to supplement the activities of the Parts
and Service Departmentin Chicago. The following
table outlines the services provided by these
facilities:
Addresses:
Factory: Crystal Service Department,
916 N. Kilbourn Ave. ,
Chicago 51, Illinois
Chicago Parts and Service Department:
4910 West Flournoy Street
Chicago 44, Illinois
Dallas Parts Depot:
7138 Envoy Court,
Dallas 35, Texas
Burlingame Parts Depot:
1616 Rollins Road,
Burlingame, California
Resonant
Area Parts &
Served Service Crystals Reeds
Southern | Dallas Factory | Dallas
area
area
These offices are fully equipped to give this
service. When ordering replacement parts, the
complete number identification of the item must
be used whether it be a component, kit or com-
plete chassis. This will fix proper identification
andinsure receipt of the desired item. Complete
number identification should also be used when
requesting equipment information.
Central
and
Eastern
area
Chicago
Parts Dept
Crystal orders should specify crystal type
number, crystal frequency, carrier frequency
and the chassis modelnumber in which the crystal
is to be used.
Orders for VIBRASENDER and VIBRA-
SPONDER Resonant Reeds should specify the type
number and frequency and should identify the
owner andoperator of the PRIVATE LINEnetwork
in which these items are to be used.
CAREFUL USE OF THE INSTRUCTION MANUAL AND THE MANY SUGGESTIONS
CONTAINED IN IT WILL FURTHER INSURE PROPERLY INSTALLED AND
MAINTAINED RADIO EQUIPMENT.
THE EQUIPMENT DESCRIBED IN THIS MANUAL IS MANUFACTURED UNDER
ONE OR MORE OF THE FOLLOWING MOTOROLA U.S. PATENTS:
iv
Zi oo) be ADE)
RE-24, 110 2,547,027 2, 688,059 ae ods Oc 2,833,994
Pyatb9 7182 275605 159 2,691,094 2s (29, 209 2,834, 879
(abe: So a Oh Os PANY Woe AEE VA 2,691,560 Lett Osote 27655; 794
2,404, 359 2, 602, 842 2,699, 425 2; Cha. 9OU 2, 846,596
2,439, 408 2, 608, 648 2,105,201 2,784, 263 2,00e, 030
2,439,412 2, 608, 649 2,713, 664 2,799,001 2,860, 239
2y459R0T5 2,626, 384 Pap pom sys 3, 2,799; 010 2, 864, 943
2,472,021 2,636, 652 2,738, 466 2517993852 2,663,521
2,524, 300 Z0St hoe a, 140; 891 2, 808, 507 2, 888, 652
2,524, 534 Z, 650',/333 2,743, 144 2,809, 236 2,899,547
2,547,023 2, 652, 542 2,743, 361 2,810,068 2,901,601
2,547,025 2, 662, 942 2,750,451 2,811,590 Zs 20o5. 909
Other U.S. Patents Pending
CONTENTS
SEC TION NUMBER
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General Description. . GoM AcAgte tty seer RN Oe) MAU SEL CWE hi kg RMA 1RO gH ag Page l
Description of Radio Set ents Pe 0 Cay AR SA OS Se coor ae ae Rea Ly Page 2
Desc Ti phonwmecanlararAcGe SS OLLeS vi ies) Yel vie hel pha hs) se 9 lw lie We aA MPa, Page 2
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Operato emi am eric re emmy vst Peis (Mee ha libs el ue Cae ReN Re, paal oet Mkeby tibiae oy Page 3
Cine Ee ac earl Or mpm MME EN saris alee dey Sof tes dole le ed bette ders leche dvw le sb Veh tie b> Page 4
Diagrams
Simplified Functional Diagram . . . eee te® kell! wegihhs WLR dah AA sis Hrs) |," 63E 856642
Front Mount Intercabling Diagram and Parts POPS E RS Oat eeiigs cilins) Vike! thas a ne pee 63E856643
ReariMountslvtercabling DiagramianduParts List: Suitiis iin ej Waited « eens 63E856644
TRANSMITTER ED ce Mos MMMM ical cate eel elt, aH Love tm Ty ah aw bite) ace ipeeclice ). \te 68P856650
Descriptionsame ais ts eMMIENC isi) Say rite, sarod Sella ive eh Bee Wg Oe eter gine vy Page 1
Guaranteed Deer gemance Buedicatians UN Wite Maa SA Sather pas Wtka oh fet vig © freee tH ale) is Page 2
Chas sisi Onepietire atom ik) WmmiE MeeOMe ei Sisal ae minepe eri ac le ee eee ahs Page 3
Circuit Operation. . . PR ee at iol ah iat hey) ete eur et bey Cab kiero (se Page 3
Adjustment of the IDC Coney MMMM Ubi o tii s, | iis MRM OY Wile t).\'e! ‘pial toiNy herded! hedahte Page 5
AM gniment ie LOCean Le vm mms Us MMM Mall iets. os leet ele ie. et et a | See Page 5
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Schematic Diagram, Parts Location Detail and Parts List . . ...... 63E856652
RECEIVER Sey Gog aU ROTA ORE at a a coe 7 0) a 68P862485
Descriptionca. SMe MAME aie oe ikcs 1% tok ine oMBeRE Rat Arai Marie a 10) Gayl Vso hg katate Page 1
Guaranteed Berermance Sper ificatinne eA EMEC ADS Li. 71S Uses ai Sh SO A Page 2
Operation . . 3) br) Se Rifle: (ae ues NEB BR SSIS SECS 9 Tf Al Ane Page 4
Alignment Eeoeeces SM SEE EE Chae Nc st diewi McAlester er CaM Rh uae lw Page 6
PRG2OpE Tat Ota tele Gee me cies cms MMB 6 oot ofc, \ve doo iteibia ty atin ste se) gs whe h Page 6
$id Bite a gece OU resco aEr AN Meme mine ecw ols OU Ne Le eee te EPD-907
Single-Frequency Receiver Schematic Diagram, Parts Location Detail and
Fatiegivetomerciurse bed |, oaiis lis ve NO tt MMA a Mien A $0 \! vec hei tay, Wis 63E 862486
-Two-Frequency Receiver Sahermatic Diagram, Bove Location Detail and
PO Lee Seema Eh SC eM SAN ch Wa viet a Ree yom, ee. es 63E862487
POWER SUPPLY 5 A ee yg UOERE REISS ra seg ih) > Sonn 68P856656
ESET OCU CC mms ou iY eee IMEC eS gue) PRN INNC NM EG Page l
Per Ore teetopenitica Ons mummers 405i 'y! oe a MER Ne gs lei) «pee Page 2
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SEC TION
Operation Fo. Ves aut. |). isch bo ein anes oly
Transistor Checkinpi:ie,' 2". . earn |
Schematic’ Diagram‘and Parts. iste) Cs
ROUTINE MAINTENANCE
Introduction. Help oiler io) Geena CS ke)
Maintenance Checks <9 4 fuera ae aes Pom, s,
Housing Parts Identification Detail. . . . .
SUPPRESSION OF IGNITION NOISE IN MOBILE EQUIPMENT
vi
Noise: Suppres sionm a: gat. a ee ene ee,
DOUTCE m4. oP ige. peeh [etemeo tetas, intl Gs as fas
Radio Wautpment Bowes SOUL Cem marti ue Gea) ic
Penition .. |. ate So Md 60) cep uct aL CMMLSE Si siriitel als.) ie
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Oil Sender ig ci ne hie an eee Ger tree is
Static Gharges ti Auiie hs ee gens erates Smeg ae Jn oe
BOndinge ise wali eae Aah s Tiikew body ss
Counterphasing or Noise Balance Sunes ee. ke
Summary . Se Op ee hp oe wre Ceo
Noise Tdentvicacion aaa Suppression Chart . . .
Typical Noise Suppression Detail . . . .. =.
NUMBER ¢
Page 2
Pagerz
63E856657
68P856479
Page 1
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Page 4
68P856127
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MOTOROLA
DIAGRAM
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REFERENCE
MODEL CHART
CARRIER SQUELCH "T-POWER"
FM TWO-WAY RADIO SETS
144-174MC {2VDC
CODE
= ONE ITEM INCLUDED
DESCRIPTION
1-FREQUENCY
ONE ITEM INCLUDED WITH ORDER FOR
FIVE (OR LESS) RADIO SETS.
ONE ALTERNATE ITEM INCLUDED. CHOICE DEPENDENT
UPON FREQUENCY RANGE.
-F CRYSTAL
TWO ALTERNATE ITEMS INCLUDED. CHOICE DEPENDENT
UPON FREQUENCY RANGE.
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CHASSIS, IS DETERMINED BY ITS APPLICATION.
TK661
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11/3/59-RCS
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EPD-1705-A
EPD-1705-A
Motorola No.
11/3/59-RCS
1. INTRODUCTION
The new MOTOROLA "T-Power'' mobile FM
two-way radio sets incorporate features which
reduce maintenance and provide full interchange-
ability between front and rear mount radio sets.
These features are:
(1)
transistorized power supply
(2) interchangeable radio set drawer assem-
bly
(3)
"plug-in"' front mount control head
a. Transistorized Power Supply
The new MOTOROLA fully transistorized
power supply uses long-life power transistors in
place of conventional vibrator units. The tran-
sistorized supply provides operating voltages for
both transmitter and receiver. The use of tran-
sistors eliminates the cost of replacing vibrators
and improves overall operation of the radio set.
b. Interchangeability
The radio set housing mounts either under
the vehicle dash or in the trunk of the car. The
same drawer assembly, including transmitter,
receiver andpower supply, slides into the housing
in either type of installation. In mobile radio
fleets where both front- and rear-mount installa-
tions are used, this design provides full flexibility
of exchange between vehicles. Rear mount radio
sets are remotely controlled by means of a dash-
mounted control head. The drawer assemblies
can be interchanged between vehicles with posi-
tive or negative ground electrical systems.
MOTOROLA INC.
AA
11/3/59-RCS
Engineering Publications
4501 W. Augusta Blvd.
-l-
DESCRIPTION
Plug-In Control Head
In dash-mount installations the control head
plugs into a receptacle on the front of the radio
set drawer assembly. Two lockscrews secure it
in place. In trunk-mount installations the control
head mounts on the vehicle dash anda cable kit
makes the connections between the control head
and the receptacle on the front of the radio set.
Thus, the same radio set drawer assembly can be
easily exchanged between front and rear-mount
housings.
2. GENERAL DESCRIPTION
a. "T.Power'!' Radio Set
The basic radio setconsists of a transmitter,
receiver, power supply and housing. The trans-
mitter, receiver andpower supplyare assembled
together to form a drawer unit which slides into
the housing. External connections are made
through receptacles on the front of the housing.
The radio set can be installed either under the
dash (front) or in the trunk (rear) of the vehicle.
Various ''T-Power'"' models are available as
shown inthe model chart which precedes this sec-
tion of the manual.
b. Accessory Groups
In addition to the basic radio set, an acces-
sory group is required to complete the installa-
tion. The accessory group includes the control
head, cable kit, antenna, mounting hardware and
other required items. Accessory groups are
classified for either rear-mount or front-mount'’
installations.
COMMUNICATIONS | DIVISION
Chicago 5], Illinois
68P856641-A
(1) Rear-Mount Accessory Groups
Rear-mount accessory groups include a
controlhead designed for mounting on the vehicle
dash and a cable kit for interconnecting the radio
set and control head.
Accessory groups are listedin the acces-
sory chart in the front of this manual.
(2) Front-Mount Accessory Groups
Front-mount accessory groups include a
plug-in control head which mounts directly on the
radio set front panel.
These accessory groups are listed inthe
accessory chart at the front of this manual.
3. DESCRIPTION OF RADIO SET ITEMS
The items included in the radio set are sum-
marized on the model chart at the front of this
manual. Majorunits, suchasthe receiver,trans-
mitter and power supply are fully described in
the various sections of this manual, as indicated
in the table of contents. Items not covered in
separate sections are described in the following
paragraphs.
a. Sub-Panel Kit
The TK603 Sub-Panel Kit is used with the
radio sets covered in this manual. This kit in-
cludes the frontand rear tie-plates and the hard-
ware required to assemble the transmitter, re-
ceiver and power supply into a single mechanical
unit. This three chassis assembly then slides
into the housing as a drawer unit. The power
supply connector mounts on the front sub-panel
of this kit, making the receptacle available foran
external mating plug. A coaxial cable which in-
terconnects the receiver rf circuit to the antenna
relay is also included with this kit.
b. Housing
The radio sets are housed in the K-9045
Housing. This housing is 9-7/8 inches wide x
18-1/2 inches deep x 6 inches high. The housing
is a heavy gauge steel cabinet designed to house
the receiver, power supply and transmitter as-
sembly as a drawer unit. The housing is finished
inanautomotive type baked enamel. Housing tops
are removable for access to components mounted
on the chassis.
c. Front Panel
The TK661 Front Panel forms the exterior
front panel of the drawer unit. This panel in-
cludes an extruded aluminum heat radiator and
the two power transistors used with the power
supply. A chrome-plated bar on this panel is a
carrying handle when pulled up and outward.
Spring catches on the heat radiator fins secure
the handle when not inuse. A key-lock mounted
on this panel secures the radio set against un-
authorized personnel. Metering ports giveaccess
to the transmitter and receiver meter sockets.
The 19-pin power supply receptacle is accessible
through a hole in this panel. The antenna recep-
tacle for the radio set is mounted on this panel.
A coaxial cable connects this receptacle to the
ANT receptacle on the transmitter chassis.
d. Crystals
° The crystals used in the radio set are listed
in the radio set model chart at the front of this
manual. If crystals are re-ordered refer to the
REPLACEMENT PARTS ORDERING paragraph
in the FOREWORD of this manual.
e. Alignment Tool Kit
The K-9322 Alignment Tool Kit is included
with the radio set at the rate of one kit per five
sets (or less, if less than five are ordered). This
kit includes the tool required for aligning the
transmitter and receiver.
4. DESCRIPTION OF STANDARD ACCESSORIES
a. Cable Kits
Cable kits are not supplied as part of the
radio set model, but are included inthe accessory
group, which must be ordered separately for each
type of installation. The type of cable kit used
depends uponfront or rear mount installation and
upon one-frequency or two-frequency operation.
The cable kits available are listed in the acces-
sory chart.
b. Installation Kit
The installation kit includes a distributor
Suppressor, by-pass capacitors, cable clamps
and mounting hardware for installing the radio
sets. It is used for front and trunk mount models.
c. Antennas
The TU316 Series Antennas are designed for
roof top installation in mobile radio sets operat-
ing in the 144-174 mc band. The antenna con-
sists of a steel rod, coaxial lead-in cable and
connector. Antenna rods are cut to length at the
factory for specific frequencies. The antennas
available are as follows:
Model No. Frequency Range
Tes lo=l, 144-152 mc.
TU-316-M 152-162 mc.
TU-316-H 162-174 mc.
d. PM Speaker
The TU324A Trunnion Mount Speaker is de-
signed for mounting ona suitable flat surface in
the vehicle. It can be mounted directly on the
firewall or dashboard or on the steering column,
when the TK395 Adapter Kit is used. The unit
consists of a3-ohm, 5 inch PM speaker installed
in a louvered steel housing. An eight-foot, 2-
conductor cable is included.
e. ''Power-Voice" Speaker
The Model TU433A-12V "Power-Voice"
Speaker isa combination speaker and transistor-
ized audio amplifier is a louvered steel housing.
Two powertransistors in a transformer-coupled,
push-pull circuit boost the receiver audio output
to a 15-watt level with less than 10% distortion.
This unit is especially desirable for all high am-
bient noise applications or where the receiver
must be monitored at some distance from the
vehicle.
5 er Control Heads
The control head provides the required con-
trol facilities for operation of the radio set. Two
basic models are available for front mount radio
sets andtwo areavailablefro rear mount models.
Model variations include one or two-frequency
operation and "wired-in'' microphone or provi-
sions for detachable microphone.
Front-mount models are designed for direct
plug-in connection to the radio set front panel.
Controlheads for rear-mount models are mount-
ed on the vehicle dash with an adjustable angle
bracket.
Refer tothe intercabling diagrams inthis in-
struction manual for wiring details of the control
heads.
OPTIONAL ACCESSORIES
TAE6010 BUMPER MOUNT ANTENNA
For use where rooftop antenna is not practical or
desirable. Also can be mounted on side of truck
cab or other flat surface. Use TLN6181A Mtg.
Kit for bumper mount, TLN6182A for flat surface
mounting.
TU546 SERIES PORTABLE TEST SET
For testing and alignment of Motorola trans-
mitters and receivers. Cable and plug mate with
METER sockets on radio chassis,
P-7208 WATTMETER
DUMMY LOAD
Used with portable test
set to measure trans-
mitter rf power output.
P-346 GENERATOR FILTER
"PLUG-IN" UNITS
TU353A MICROPHONE
TU475 TELEPHONE
HANDSET
Used to attenuate generator interference. Rated
at 40 amperes.
For control heads
with4-pin MIC recep-
tacle. Built-in tran-
sistorized pre-ampli-
fier, Moving coil
element for improved
voice reproduction.
12' coiled tinsel cord.
DPST push-to-talk
switch. Mic. and
handset interchange-
able.
SPECIAL PURPOSE KITS
K-8292 Hood Wiper--Suppressor. Used to reduce
interference from noise generated in the vehicle.
K-7257 Extension Cable. Provides full length
ground return from rear-mount radio set to bat-
tery. Consists of two 17-foot lengths No. 4 cable
with lugs at each end.
Long Cable Kits. For limousine and truck instal-
lations. With 20-ft cables instead of Le ehee
cables. Fully interchangeable.
EPD-1742(CE1070) EPD-1490
EPD-1491 MC1971
EPD-1741(CE044)
INSTALLATION AND OPERATION
INSTALLATION
Installation instructions are packed and shipped with the radio set accessories.
OPERATION
1. PRE-OPERATIONAL CHECKS AND
ADJUSTMENTS
a. Purpose
The purpose of the pre-operational check is
to ascertain that the mobile radio set is oper-
ating properly when initially placed in service.
The equipment has been accurately aligned
at the factory for optimum performance. It is
possible, however, that mishandling in transit
may have disturbed some of the adjustments. It
is essential, therefore, that a pre-operational
check be made to assure proper operation when
the equipment is installed.
b. Pre-Installation Bench Check
The radio set can be checked before instal-
lation using a bench test set-up with permanently
installed cabling and control facilities and a bat-
tery or battery eliminator. The dc supply must
MOTOROLA INC.
AA
Engineering Publications
11/3/59-RCS
4501 W. Augusta Blvd.
aes
be a 12-volt source. An antenna dummy load, rf
wattmeter or operational antenna must be con-
nected to the radio set ANTENNA connector on
the front panel. A test set for metering the
transmitter and receiver should be available.
This type of laboratory set-up is particularly
useful where many sets must be checked, how-
ever, it does not give a complete check of the
actual cables, control unit and speaker to be
used.
The ideal set-up for a pre-installation check
is a bench test in which the radio set, cable kit,
control head, speaker and antenna are assembled
to form a complete facsimile of the vehicular
installation. The pictorial cabling diagrams in
the installation instructions packed with the cable
kit show how to interconnect the various items.
Once the test set-up is assembled the equip-
ment can be turned on and operated as described
in the following paragraphs.
COMMUNICATIONS DIVISION
Chicago 5], Illinois
68P856645-A
c. Installation Checks
Before placing this radio set in operation
make the following installation checks:
(1) Suenerel
Be sure all cable connections and bolted
connections are secure. Make sure all fuses are
in place and all tubes are firmly seated.
— i
(a) Be sure the equipment is connected
with the proper polarity to al2-volt dc electrical
system. Set the ON-OFF toggle switch to the ON
position. This applies the dc input to the radio
set.
(b) The green pilot lamp should be lit
and all tube filarnents should be energized. To
check filaments, unlock the drawer assembly and
slide the drawer out or lift the top of the housing.
After making this check keep the radio set open
for the following checks.
(3) Check Receiver
(a) Meter Readings
Check receiver meter readings
against the STAGE MEASUREMENT CHART in
the RECEIVER section (noise input readings
only). Use the Motorola portable test set or
equivalent 0-50 microamp. test meter. The
cable of the portable test set plugs directly into
the metering socket of the receiver chassis.
Check meter readings in the various test po-
sitions as indicated on the chart. If any of the
readings are beyond the given limits, re-align
the receiver as described in the RECEIVER
section.
(b) Check for Normal Operation
With the receiver properly aligned,
the dc input applied to the equipment and the an-
tenna connected, the receiver should be in full
operation. Check for proper operation as
follows: Turn the VOLUME control to the full
clockwise position. Turn the SQUELCH control
to the full counterclockwise position (open). You
should hear either a loud, rushing noise in the
speaker or signals from any on-frequency station
which may be on the air at this time. In the
absence of any received signals the loud, rushing
noise is a normal indication of receiver oper-
ation with "open" squelch.
(c) To Set the VOLUME Control
There are two controls involved in
adjusting the audio level to the speaker. These
controls must be adjusted in the presence of a
normal, fully deviated signal from the base
station transmitter (or other mobile located at an
average distance). To adjust these controls pro-
ceed as follows:
With a signal being received, set
the VOLUME control on the control head to
maximum volume (fully clockwise). Then adjust
the audio level control on the receiver chassis to
a setting just below the point where distortion
becomes audible. Now, reset the control head
VOLUME control for the desired listening level.
The use of two controls in the audio
circuits permits future readjustment of the
speaker level at the control head without re-
setting the receiver audio level control.
(d) To Set the SQUELCH Control
Turn the SQUELCH control in the
clockwise direction until the noise is squelched
(cuts out).
The operation of the transmitter in this
radio set is covered by FCC rules and regu-
lations. Several provisions of these rules are
briefly summarized in this paragraph. For
complete information, refer to the current FCC
regulations covering the applicable type of
service and equipment. FCC regulations
excerpts:
(a) Transmitter frequency and devi-
ation must be checked before a transmitter is
placed in service and at least every six months
thereafter. A suitable procedure _ shall be
employed to ascertain that the transmitter is on
the assigned carrier frequency and that the
transmitter crystal actually controls the fre-
quency of the radiation. Modulation deviation is
limited to +15 kc for 40 kc, 60 kc and 120 kc
channel spacing operation and to +5 kc for 20 kc
and 30 kc channels.
(b) The rf power output of a trans-
mitter shall be no more than required for satis-
factory technical operation considering the con-
ditions of its use.
(c) Only duly authorized radio oper-
ators or personnel working directly under their
supervision may tune or adjust a radio trans-
mitter.
(5) Check Transmitter
(a) Operational Check
The transmitter must be checked
for proper operation before the equipment can be
placed in service. Connect a dummy load lamp,
rf wattmeter or the regular mobile radio set
antenna to the ANTENNA receptacle on the front
panel. Set the HI-LO switch on the power supply
chassis to the HI position. Press the micro-
phone push-to-talk button momentarily and listen
for relay operation. The transmit-receive relay
on the power supply chassis and the antenna re-
lay on the transmitter chassis must operate.
Check for indication of rf power output. The
dummy load lamp should glow or the rf watt-
meter, if used, will show the rf power output.
If the regular mobile antenna is used, the trans-
mitter should radiate signals to receivers of
other sets on the same frequency.
CAUTION
Do not key the transmitter more thana
few seconds at a time while making
these operational tests.
If the operational test is satis-
factory, proceed to the next step. If there is no
indication of rf output, some _ troubleshooting
must be done before proceeding. The simplified
functional diagram in this section shows the
overall operation of the radio set and gives the
step-by-step sequence of operations. The inter-
cabling diagrams trace the various circuits from
chassis-to-chassis. Schematic diagrams of each
chassis are included in the various sections of
the manual. With these diagrams, the technician
can understand how the radio set works and can
isolate troubles to a specific chassis or stage
thereof.
(b) Meter Readings
Refer to the alignment procedure in
the TRANSMITTER section of this manual. With
the HI-LO switch in the HI position check meter
readings against the values given in the FINAL
METER READINGS CHART. The transmitter
must be keyed to obtain readings. Use the
microphone push-to-talk button or the switch on
the Motorola portable test set. Towcheck
readings consult the chart and set the switch to a
given position. Then key the transmitter just
long enough to observe the reading. Readings
can be taken in any order. If the readings in
positions 2, 3, 4, 5 or 6 are below the minimum
values given, re-align the transmitter as de-
scribed in the alignment procedure. The reading
in the PA position is not too important at this
point, however, if it is above the maximum value
given, do not key the transmitter any more than
absolutely necessary.
It is advisable to follow the com-
plete alignment procedure at this point, since the
next step requires a repeak of the transmitter
adjustments to obtain full rf output.
(c) Loading to Antenna
Set the HI-LO switch to LO and load
the transmitter to the antenna as described in the
last three steps of the alignment procedure.
d. Deviation Check
FCC regulations require a deviation check
before a transmitter is placed in service. This
check is described in the TRANSMITTER section.
2. OPERATOR’S INSTRUCTIONS
a. To Turn "ON"! Equipment:
Place the ON-OFF switch in the ON position.
The green indicator will become illuminated.
The receiver is now in full operation and the
transmitter filaments are "'on".
NOTE
If multi-channel transmitter and/or re-
ceiver is used, place frequency selector
switch in desired frequency position.
b. To Receive:
(1) Turn the VOLUME control to the full
clockwise position.
(2) Turn the SQUELCH control to the full
counterclockwise position.
(3) Adjust the SQUELCH control, by turning
the control slowly clockwise until the noise is
just squelched (cuts out). Turning the control
beyond this point will increase the minimum
signal necessary to open the squelch circuit.
(4) Set the control head VOLUME control to
the desired speaker level with a received signal.
or To Transmit:
(1) Remove the microphone from the hanger
bracket and press the push-to-talk button. The
red indicator lamp will become illuminated, indi-
cating the transmitter is "on". If a military or
noise cancelling type microphone is used, hold
the microphone at approximately a 30° angle
from the lips and speak clearly and distinctly
across the microphone in a normalor loud voice.
If a handset microphone is used, speak directly
into the mouthpiece of the handset. The TRANS-
MITTER CANNOT BE OVER-MODULATED BY
SPEAKING LOUDLY.
(2) To receive reply, release the push-to-
talk button. The red indicator lamp will go "off"
indicating that the transmitter circuits are no
longer energized. The received reply may now
be heard over the speaker and/or the handset
earpiece (if used).
(3) When the transmission is completed,
release the push-to-talk button and hand the
microphone on the hanger bracket.
d. To Turn "OFF'' the Equipment:
Place the ON-OFF switch in the OFF po-
sition. The green lamp will be turned "off".
3. CIRCUIT DESCRIPTION
The operation of the radio set as a whole is
illustrated in the simplified functional diagram in
this section. Refer first to the SEQUENCE OF
OPERATIONS table for the various steps, then to
the components as identified on the diagram.
The diagram applies to both front-mount instal-
lations and rear-mount installations. The only
differences between these two types of instal-
lations are in the control head and dc input cir-
cuit. The power supply, transmitter and
receiver are the same for both installations.
Once the simplified diagram is clearly
understood refer to the POWER SUPPLY section
of this manual for full information on the tran-
sistor multivibrator and relay action. For de-
tailed description of the transmitter and re-
ceiver, refer to the TRANSMITTER and RE-
CEIVER — sections. For exact intercabling
connections between the various chassis, refer
to the intercabling diagrams in this section.
FRONT MOUNT
INSTALLATIONS
© O
i HI B+ TO XMTR.
= CONTROL PA PLATE
= '2-VOLT HEAD
= BATTERY (3)
ies GREEN
LAMP
4
O SWITCHED B+ TO RCVR,
33 13
Teas XMTR. MULT.
O
= VEHICL N
aA Ar ihaae XMTR, OSC.
BIAS TO XMTR.
PA GRID
ACTS
REAR MOUNT
INSTALLATIONS
y = OF OPERATIONS
Bint | “TURN- OFF” OPERATION
\)
4. P-T-T BUTTON RELEASED.
2. TRANSMIT—RECEIVE RELAY AND
RELAY a ANTENNA RELAY RELEASES.
3, TRANSMITTER OFF, RECEIVER BACK IN
OPERATION. RED LIGHT GOES OUT
("STANDBY " CONDITION.
aft
an te=VOLT
= BATTERY
i
CONTROL
HE AD
= VEHICLE GROUND
"'T_Power'' Mobile FM Two-Way Radio, 144-174 MC
Simplified Functional Diagram
Motorola No. 63E856642-B
11/3/59-RCS
Ci To Transmit:
(1) Remove the microphone from the hanger
bracket and press the push-to-talk button. The
red indicator lamp will become illuminated, indi-
cating the transmitter is "on". If a military or
noise cancelling type microphone is used, hold
the microphone at approximately a 30° angle
from the lips and speak clearly and distinctly
across the microphone in a normalor loud voice.
If a handset microphone is used, speak directly
into the mouthpiece of the handset. The TRANS-
MITTER CANNOT BE OVER-MODULATED BY
SPEAKING LOUDLY,
(2) To receive reply, release the push-to-
talk button. The red indicator lamp will go "off"
indicating that the transmitter circuits are no
longer energized. The received reply may now
be heard over the speaker and/or the handset
earpiece (if used).
(3) When the transmission is completed,
release the push-to-talk button and hand the
microphone on the hanger bracket.
d. To Turn "OFF'' the Equipment:
Place the ON-OFF switch in the OFF po-
sition. The green lamp will be turned "off".
3. CIRCUIT DESCRIPTION
The operation of the radio set as a whole is
illustrated in the simplified functional diagram in
this section. Refer first to the SEQUENCE OF
OPERATIONS table for the various steps, then to
the components as identified on the diagram.
The diagram applies to both front-mount instal-
lations and rear-mount installations. The only
differences between these two types of instal-
lations are in the control head and dc input cir-
cuit. The power supply, transmitter and
receiver are the same for both installations.
Once the simplified diagram is clearly
understood refer to the POWER SUPPLY. section
of this manual for full information on the tran-
sistor multivibrator and relay action. For de-
tailed description of the transmitter and re-
ceiver, refer to the TRANSMITTER and RE-
CEIVER _ sections. For exact. intercabling
connections between the various chassis, refer
to the intercabling diagrams in this section.
FRONT MOUNT
INSTALLATIONS
ANTENNA RELAY
CIRCUIT THIS IS A SIMPLIFIED FUNCTIONAL DIAGRAM.
SEE SCHEMATICS FOR EXACT DETAILS. ALL
RELAYS SHOWN DE-ENERGIZED.
CONTROL
HEAD
ik VEHICLE GROUND
RELAY. RELAY APPLIES DC TO RADIO
SET. GREEN LAMP GOES ON.
FILAMENTS ENERGIZED. TRANSISTOR
MULTIVIBRATOR OPERATES. RECEIVER IN
FULL OPERATION ("STANDBY” CONDITION),
MIC, P-T-T BUTTON PRESSED.
TRANSMIT-RECEIVER RELAY AND
ANTENNA RELAY OPERATES
TRANSMITTER ON AIR. RECEIVER MUTED.
RED LIGHT ON ("ON-THE-AIR" CONDITION).
O Co
a
4 ie | v4 Hi B+ TO XMTR.
POLARITY RECTIFIER PA PLATE
= ae CCRC 3) px REVERSING AND
S SS : RED TERMINAL FILTER
——— ATT £
= BATTERY a - oe a | NETWORK
. LAMP —< +avoe hed |
ae tL |
/ | SWITCHED B+ TO RGVR.
RECTIFIER
| AND XMTR. MULT.
4 FILTER 17
ANTENNA Q2 NETWORK
RED RELAY
LAMP ON 9p Pa tle che Se ee
CONTROL G XMTR. CP, Gh
HEAD FILS. =
\ / AND | BIAS TO XMTR.
FILTER PA GRID
TRANSMIT-
RECEIVE NETWORK |
fk RELAY aa
T-R RELAY RELAY CONTACTS
REAR MOUNT aN CONTACTS
4
INSTALLATIONS / of
r RcvR 8°
ji ca XTAL. 2
| OVEN BO
H SEQUENCE OF OPERATIONS
U ©
MIC | | “TURN-ON" OPERATION “TURN- OFF” OPERATION
aes | eo ae Co cn | a ae eR ee pe gre
BUTTON = ON-OFF SWITCH SET TO ON POSITION. P-T-T BUTTON RELEASED.
POLARITY CONTACTS <j O ) 0
+ ae ih REVERSING ‘ 0.47 FRONT—MOUNT-SWITGH APPLIES DG TO TRANSMIT — RECEIVE RELAY AND
= ELA TERMINAL RADIO SET. GREEN LAMP GOES ON, ANTENNA RELAY RELEASES.
== $2-VOLT eye | oe neh GROUND REAR-MOUNT-SWITCH ENERGIZES "A"
= BATTERY
TRANSMITTER OFF, RECEIVER BACK IN
OPERATION. RED LIGHT GOES OUT
("STANDBY “ CONDITION.
"'T-Power'' Mobile FM Two-Way Radio, 144-174 MC
Simplified Functional Diagram
Motorola No. 63E856642-B
11/3/59-RCS
J
ANT. CONNECTOR
ON FRONT cane
REVISIONS
issve|__Surrix__[svpo.]| chance Locarion
A TLN6155A 2-FREQ, RCVR, TERM.
RCVR, FILTER KIT
ADDED
MINOR REVISIONS
IN POWER SUPPLY
Front Mount Radio Set
Intercabling Diagram
Motorola No. 63E856643-B
11/3/59-RCS
CONTROL HEAD POWER SUPPLY TRANSMITTER TRANSMITTER
TB rT)
3 ANT, CONNECTOR
TO UNGROUNDED i Ft Le SEE r RED eren io cles (6) REO- BLU 400VvDC B++ ON FRONT roe
fa BLK we, |
BATTERY TERMINAL - ome @ = = o Re 12v0C 5 ov ex ¥ ele TRANGIeTORS | LeTaoowocun a. ‘i -
20a SMALL LUG pape | TRANGRORHER ‘. ! RED-YEL RED-YEL
= +275VDC OR
POLARITY RED-GR Fersvoe B+(144-174MC MODELS ONLY)
Switch REVERSING Ag = +200V0C ° ED=GRN
Ri =
Bre | bbc ie as SEIER REDSERY 275 VDC 8+(25-54 MC MODELS ONLY)
TO BATTERY GROUND (eis) QC ae ak ele NETWORKS
LARGE LUG
we 10g REVISIONS
CONTROL HEAD NOTES * OQ ' PA SCREEN DIAG. CHASSIS REF.
“ {.CONTROL HEAD MODELS TCNGOOOAA AND TCN6OOOAB INCLUDE SAU ITURREVERCINCIRTERMINALS \ A isse| ‘Gare | __| syweou CHANGE LOCATION
PRE-AMPLIFIER DETAIL Pete ewe cpr i SHOWN ALOR ANEGATIVES BATTERS GROUND ; A TLN6155A 2-FREQ. |RCVR. TERM
2. CONTROL HEAD MODELS TCN6OOOAE AND TCN6OOOAE REQUIRE = (BLK TERMINAL TO ARROW)- \ Lo een 2 ee CVE ER
A MICROPHONE WITH A 4-PIN PLUG-IN CONNECTOR. FOR POSITIVE BATTERY GROUND, voc ! GRN ~ RED an Ace AaED owas
DPA MICROPHONE USED IN TCNG6OOO0AA AND TCN6000AB CONTROL HEADS. os2 | (RED PIN TO ARROW) | RED- BLK WHT-RED 1S0VDC OSC. PLATE @ SCREEN OE Oe
GRN \ . IN POW Y
va halict 4. LINES CODED ° REPRESENT CIRCUITRY AND i anon
TERE MICROPHONE USED IN TCNGOOOAE AND TCNGOOOAF CONTROL HEADS. (0) !
R9 |
\
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RED !
= 1
((O)) '
AZ BLK-WHT ' BLK-WHT
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MAY OR MAY NOT BE IN an . 4
THE CIRCUIT WHEN SHIPPED. J
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BLK iy | | GRAY 6 | BRAID
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' :
GRN ua) > cs R4 IS PART OF CONTROL HEAD a an te eo — — —_ FREQ. 2 OSC. CATHODE
— — — o—— 0 — 0 —— 0 —— 0 ——-_ 0 ———_ o—D ° ° .
oe ae a al ae a rores 2 M SN SS WITH MICROPHONE RECEPTACLE
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pe ee ee a ae ee SS as oN SOS — — — FREQ. {4 OSC, CATHODE
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2-FREQ. SWITCH oF! wHT-GRN RED SHIELDED
| ws AEG Wee. l — oa. oe
s
- _—— — — J] — — — © FREQ. OSC. CATHOO
ah Rigas IN MICROPHONE rt | m1 47-V/2W BLK EQ. oO rE
R f N = £
pu 1— 1 ——1 —_ 12 _, —_1 —_ 1 1_1 3 $2 My SANENT —< 5 R Slot
: Soe tees eee ; + Sen i ee |
dl 1 ! 1 t] ' 1 1 1 1 ‘ SQUELCH 84
een — (Or be en | £0
1 ——— si 14g f WHT- ORG SWITCHED B+ WHT- ORG FEEDER
B+ TO 2ND. LIMITER
NOISE AMPL. CATHODE
' _—— oo ———— ———— — oO — 7 opor SQUELCH
BLU
is as Oe Kemer <— Revr_auoio ee ee
oa =
| BLK-WHT
'
a ee | ase) -
!
1
|
GRN-YEL
1
a 20 ae BRN-GRN
To 1) (cs ae ee | ® FREQ. 2 OSC. CATHODE
RECEIVER
RCVR FILS 142V0C
SPEAKER
SROKOISCIONCIONON:
[RECEIVER |
Front Mount Radio Set
Intercabling Diagram
Motorola No. 63E856643-B
11/3/59-RCS
EPD-1516-O
TRANSMITTER
400V0C B+tt
Jf
ANT, CONNECTOR
ON FRONT een Bee
275 VDC 8+(144-174MG MODELS ONLY)
TLN6155A 2-FREQ.
75 voc -54 MC Mi 3 Y K
275 VOC B+ (25-54 MC MODELS ONLY) RCVR, FILTER KIT
hA SCREEN
PA GRID BIAS
150VDC OSC. PLATE & SCREEN
OUTPUT
ee
FREQ. 2 OSC. CATHODE
FREQ. 4 OSC. CATHODE
PINS, METER PLUG
FREQ.4 OSC. CATHODE
B+ TO 2ND. LIMITER
NOISE AMPL. CATHODE
OUTPUT
PLATE
FILS.
FREQ,.2 OSC CATHODE
RECEIVER
Rear Mount Radio Set
Intercabling Diagram
Motorola No. 63E856644-B
11/3/59-RCS
PARTS LIST for Intercabling Diagram 63E856643-B
NOTE
Reference symbols using the initial letter '"X"
(XV1, etc.) denote the mounting for "plug-in"
components. Thus, "XV1"'is the socket for
tube V1, etc.
MOTOROLA
PART No.
AMPLIFIER, AF:
~ microphone pre-amplifier:
assembly; includes:
1V859594 BOARD, printed cir-
cuit; assembly; includes
soldering lug terminals
Reference parts Cl, Ql, R5,
R6, R7, R8&
CAPACITOR, fixed: electrolytic;
23C855013 tubular; 20 uf +100-10%; 25 vdcw
or 23B844927
23C855013
1V861317
tubular; 20 uf +100-10%; 25 vdcw
same as C2
CARTRIDGE, microphone:
magnetic; dynamic type; 175 ohm
impedance at 1 kc
59C 852603
LAMP, incandescent:
65R4151 ~~ 6-8 volt; .2 ampere; single con-
tact bayonet base; globular
glass; type 51
same as DSI]
FUSE, cartridge: one time; paper;
20 ampere; 250 volt; 2" long x
9/16" diameter
65K82482
CONNECTOR, receptacle: female;
assembly: includes mounting
bracket and single contact,
coaxial connector
9B16345 4 contact; polarized; round
molded black phenolic base;
chassis mounted; includes:
4S7699 LOC KWASHER:
13/16" internal
2K81180 NUT, ring
19 contact; polarized; rectangular
molded black phenolic base;
chassis mounted; does not
include 7B855113 BRACKET,
connector mounting, nor
64C 855103 PLATE, connector
mounting; bracket and plate
must be ordered separately
1V855055
9C801050
MICROPHONE, dynamic:
TU353A palm type; contains transistor
("plug-in") amplifier and "push-to-talk"
switch; includes reference
parts Al, DPl, W8
palm type; contains transistor
amplifier and "push-to-talk"
switch; includes reference
parts Al, DPl, W4
or 1V852400
("wired-in")
CONNECTOR, plug:
male; single contact; round bake-
lite wafer insulator; cable
mounted; connects to Trans-
mitter Antenna Relay Antenna
Connector
same as Pl except connects to
Transmitter Antenna Relay
Receiver Connector
same as Pl except connects to
Receiver Antenna Connector
28A474006
REFERENCE MOTOROLA
SYMBOL PART No.
DESCRIPTION
CONNECTOR, plug: (continued)
~~ 2 contact; polarized; round
phenolic wafer insulator;
cable mounted; does not include
15B855111 SHELL, connector;
shell must be ordered
separately
9B855112
TRANSISTOR:
type MN60; does not include
144861196 INSULATOR;
insulator must be ordered
separately
48K124317
RESISTOR, fixed: carbon; +10%;
1/2 w; ins.; unless otherwise stated
wire-wound; 4 ohm +2%; 1 w
variable: wire-wound; 20 ohm
+20%; 2 w
18K855107 variable: wire-wound; 10K; 2 w
6R6336 270 ohm; 1 w
6R6080 4. 7K
6R5581 S2oK
6R5660 180 ohm
6R5621 10 ohm
6R488016 33 ohm; 2 w
6R5550 47 ohm
same as R10
SWITCH, toggle:
Sa Oene
S.P.D.T.; does not include
288382 NUT, machine:
15/32-32 x 9/16" hex;
2 required; nuts must be
ordered separately
17K892469
18K855108
40B858304
40A 80248
BOARD, terminal:
31A890699 6 screw terminals
LEAD, electrical:
"Battery to Fuseholder; includes:
30K831572 CABLE, power:
single conductor; #10 ga.;
stranded; ins; coded BLK;
2 ft. length required
29K832116 LUG, ring tongue:
for 3/8"' stud and #10 wire
29K824154 LUG, ring tongue:
for #10 stud and #10 wire
1V832063
LINE, RF transmission:
assembly, Antenna to Transmitter
Antenna Relay; includes:
1V855054 ASSEMBLY, cable
and plug: includes:
30B475378 CABLE, RF:
coaxial; RG-58A/U; 6"
length required
Reference part Pl
Reference part Jl
Transmitter Antenna Relay to
Receiver Antenna Input;
includes;
30B475378 CABLE, RF:
coaxial; RG-58A/U; 24"!
length required
Reference parts P2, P3
1V855053
1K800193
CORD, microphone:
assembly; includes:
30K852742 CORD, coiled; tinsel
414852707 SPRING, strain
relief
11M2506 TUBING, extruded,
#9 BLK; 1" length required
294847033 LUG, terminal;
wire mounted; insulation
piercing; 8 required
1V854006
CABLE, power:
~~ single conductor; #10 ga. stranded;
insulated; coded black; 9 ft.
length required does not include
29K824154 LUG, ring tongue:
for #10 wire and #10 stud; lug
must be ordered separately
same as W5 except does not
include 29K832116 LUG, ring
tongue; for #10 wire and 3/8"
stud; lug must be ordered
separately
2 conductor; rubber covered;
each conductor; #18 ga.
stranded; 41" length required
assembly; includes:
30K852742 CORD, coiled; tinsel
41A852707 SPRING, strain
relief
11M2506 TUBING, extruded;
#9 BLK; 2'' length required
29A847033 LUG, terminal; wire
mounted; insulation piercing;
4 required
29A847034 LUG, terminal; wire
mounted; insulation piercing;
4 required
37K480513 SLEEVE, rubber
Reference part P5
30K831572
30A825430
1V854034
LAMPHOLDER:
single contact; miniature;
bayonet base
same as XDS1
94859619
FUSEHOLDER: single fuse mounting
chassis mounted; for fuse 2"
long x 9/16" diameter
NON-REFERENCED ITEMS
67K892616
TLN6000A Installation Kit, includes:
1V859627 Cable Clamp Kit: includes:
42A19376 CLAMP, cable: 4 req'd
387467 SCREW, tapping: #8 x
3/8" plain hex; 4 required
Mounting Hardware Kit: includes:
38125947 SCREW, tapping: #14 x
3/4'' plain hex; 4 required
45119331 LOCKWASHER: 1/4'!
split; 4 required
1V84019 Noise Filter Kit: includes:
8A821889 CAPACITOR, generator
hash filter: fixed: paper;
tubular; .5 uf +20%; 150 vdew;
one lead grounded; one lead
insulated; 2 supplied
6A4141 SUPPRESSOR, noise:
resistor; screw type
457670 LOCKWASHER: 1/4"
internal; 2 required
TK611 Cable Kit, includes:
Reference parts Fl, XFl, W1
32A880952 |GASKET, fuseholder
1V474596 Mounting Hardware Kit, fuseholder:
includes:
4483863 WASHER, cushion:
2 supplied
35400465 SCREW, tapping: #10
x 3/4'' slotted round head;
2 supplied
1V849628
MOTOROLA
DESCRIPTION
Mounting Hardware Kit, (continued)
4S7658 LOCKWASHER: #10
internal; 2 supplied
4S1706 WASHER: 3/8" x.203 x
- 033"; 2 supplied
Microphone, includes;
Items used in both ''wired-in"' micro-
phone and "'plug-in'' microphone
Reference part Al
BACK HOUSING AND HANG-UP
STUD ASSEMBLY
SWITCH, push
LOCKSCREW: 6-32 x 1/4"; Phillips
round head; 3 required
STRAP, strain relief
BUTTON, push
FRONT HOUSING
GRILLE
CLOTH, grille
EMBLEM, MOTOROLA trade mark
GASKET, rubber
INSULATOR: used for insulating
printed circuit assembly
CLAMP, used for securing micro-
phone cartridge
INSULATOR: used between clamp
and microphone cartridge
WASHER, insulating; used as a
spacer
LOCKSCREW: 6-32 x 5/16"; Phillips
round head
SCREW, machine: 6-32 x 7/8";
Phillips round head; 2 required
LOCKWASHER: #6 split; 2 required
1V854005
40B857174
35124693
42A852710
384852699
15D852566
13B852 703
35A852701
13A852709
32B852 702
144857138
42A852705
144857137
4K852 762
38127924
35127481
45400386
Items used in 1V852400 ''wired-in'"!
pElGEOpHONeIODy,
Reference part W4
NAMEPLATE: Model Identification
33K852697
Items used in TU353A "plug-in"
microphone only -— —~
Reference part W8
NAMEPLATE: Model Identification
Mounting Kit, microphone: includes:
64A85596 PLATE, support: for
microphone hang-up
3S122830 SCREW, tapping: #8 x
1/2"; 2 required
33K852698
1V16241
Control Head
Each control head model includes the items
shown for the model, plus items which are
common to all.
TCN6000AA (1-freq. with 'wired-in'"!
microphone); includes the following
items:
1V852400 MICROPHONE (reference part
MK1)
13D859614 ESCUTCHEON
38A857093 BUTTON, plug
37K106352 GROMMET, rubber; for 7/16"
diameter hole
MOUNTING KIT, microphone:
includes:
64A85596 PLATE, support: for
microphone hang-up
35122830 SCREW, tapping: #8 x
1/2"; 2 required
1v16241
REFERENCE
SYMBOL
MOTOROLA
PART No.
1V852400
13D859615
38A85 7093
37K106352
1v16241
13D859614
487691
29R5279
13D859615
487691
29R5279
288382
61B859620
61K859621
4S7691
288364
64C 855103
7B855113
42A855115
26B857812
3S122080
36B855027
DESCRIPTION
TCN6000AB (2-freq. with "wired-in"
microphone); includes reference
part S2 and the following items:
MICROPHONE (reference part
MK1)
ESCU TCHEON
BUTTON, plug
GROMMET, rubber: for 7/16"
diameter hole
MOUNTING KIT, microphone:
includes:
64485596 PLATE, support:
for microphone hang-up
38122830 SCREW, tapping: #8
x 1/2"; 2 required
TCN6000AE (1-freq. with receptacle
for "plug-in" microphone);
includes reference parts J2, R4
and the following items:
ESCU TCHEON
LOCKWASHER;: 3/8" internal
LUG, soldering: 7/8"
TCN6000AF (2-freq. with receptacle
~~ for "plug-in" microphone):
includes reference parts J2, R4,
S2 and the following items:
ESCUTCHEON
LOCKWASHER;: 3/8" internal
LUG, soldering: 7/8''
Items common to all control heads
Reference parts DSl1, DS2, J3, P4,
S1, TBl, W5, W6, W7, XDS1,
XDS2
NUT, machine: 15/32-32 x 9/16"
hex; 2 required
LENS, indicator: RED
LENS, indicator; GRN
LOCKWASHER;: 3/8" internal
NUT, machine: 3/8-32 x 1/2"
hex; 2 required
PLATE, connector mounting
(back cover)
BRACKET, connector mounting
CLAMP, cable
SHIELD, indicator lamp: 2 req'd
LOCKSCREW: 6-32 x I/4" plain
hex; 6 required
KNOB, control: 2 required
EPD-1516-O
CONTROL HEAD
CONTROL HEAD NOTES
CONTROL HEAD MODELS TCN6OOIAA AND TCNEOO(AB INCLU
A WIRED-IN MICROPHONE.
RO WHT-BLK
3 SHIELD
CONTROL CABLE Cr)
w2
.CONTRUL HEAD MODELS TCNSIOI(AE A/D TCKGOOIZF REQUIRE BRN S SS y u 12v0C a Oo
CONTROL HEAD JUMPER TABLE A MICROPHONE WITH A 4-PIN PLUG-IN CONNECTOR. t= Y ine = Bue ~ oO 9 aZ
. LINES CODEO ——8 REPRESENT CIRCUITRY AND 48 am POLARITY
MICROPHONE USED IN TCN6904A4 AND TC/IGODIAB CONT ?Ci. KES. TAN ane
MINAL:
LINES CODED ° REPRESENT CIRCUITRY AND GRAY-GRN Fe i VIOLET ——— 2
MICROPHONE USED IN TCN6QU4AE AND TCN6OOIAF CONTROL EATS. BLK SUK Le i
< — SIZ
EQUIPMENT USED* JUMPERS BRN-YEL a | TAN S
s1 OOFF w3
a HANG-UP ep ak trae! ee oh a <a —os Xe oRooNe . a \
- POLARITY REVER:
MIC. HANDSET QUIK-CALL JU Ju2 JU3 AN a" t+— = ___ im SHOWN FOR NEG
BOX PRE-AMPLIFIER DETAIL nea e nea ere oy ee WHT-GRN BRN WHT RELAY = = (BLK TERMINAL T
s2 | a cre) SS Kt sp BlkK DG FOR POSITIVE 8.
6 o
SAN wnt enN—BLU i (neo LeAO TO ARR
« Tease see a
Basic operation. Radio Set Speaker in usep | usED ELEMENT |<: |
circuit at all times ee w7— D Fe
SQUELCH 20 —— 2 208
CONTROL ! |
Handset picked up connects audio to yor ie 41 Q-ws
handset earpiece 22 Cons |
8 Sc onconeror (2 VOLT BATTERY VIOLET BLK-WHT
. . LK POSITIVE OR
Handset picked up connects audio to Sl Jae eae) NEGATIVE GROUND ae [
handset earpiece, speaker in circuit. THE JUMPER ACROSS R86 <54 2. CONNECT (W7) BETWEEN
MAY OR MAY NOT BE IN ue “S" RELAY TERMINAL AND
THE CIRCUIT WHEN SHIPPED - <55 ACCESSORY TAP ON IGNITION
SWITCH
Audio to speaker when microphone is o4 > 20 _ |
removed or hung up. Alarm circuit OMIT USED 2 New PART OF CoMTROL HEAD
energized. 'Quik-call'' disabled. wil WITH MICROPHONE RECEPTACLE 6 op |
L
as = REO as (i) 4 i) — =
= ; ° °o—o ° o—o ° o—o o—o rent o> The ° e aS OPTIONAL ACCESSORIES
Audio switched from speaker to handset ye ee ae ei oe ee a Sa yp RIN Ee Sr eS PARTIAL DIAGRAM OF |
i : : : ag 40 RCVR. QUIK- CALL UNIT
earpiece. Alarm circuit energized es Bee, Mee | Rees GAN ee ee erent A | 3 I WHT . aS: ° [
tt “ oe |
. ©, 50
: a it ¢ i ° ee er | ae oN ES Tet =
Audio switched from SS te Lore MICROPHONE a A | BLU acai : Be oa
speaker and handset. Alarm circuit L. ‘ RED RED Ug tena T
nergized.
energize OR | WHT
"Quik-call'' used for alarm purposes only. A — WIRED-IN MICROPHONE wo ~
: * R t
Audio to speaker at all times. USED | USED y— + 1 — 1 #82 yp ‘ _ oA
BLK 4
Oe ee 1 1——_! 270 SEE NOTE Jus
GRN it WHT- BRN PART OF
— }—— |) ————— 8 1 —— 1—— 1 ‘ ; if ‘ a5 HANG-UP BOX
T
gee ee gee een 43 =
PLACING HANDSET OR MICROPHONE
IN HANG—UP BOX MOVES
as i HANG-UP-BOX CONTACTS TO LEFT
SPRING ACTION RETURNS
CONTACTS WHEN HANDSET
OR MICROPHONE IS PICKED UP
* X= item used
--- = item not used
VOLUME
CONTROL
46
LI J
: | ae
20
SPEAKER = anal
CONTROL HEAD BACK PANEL aa :
Pt -
J2,J3,04 re 56 oo 00006
© © 00000 0
47 9°«18 a 17
r
a9 [a
INSERT UNDER SCREW ON
BACK PLATE OF CONTROL HEAD 6 8&8 «2 3 7 8
R2 wHT-B8LK
GRAY-GRN
BRN-YEL
lag
WHT-REO
F
2. | | ks
___ SRN- WHT
Se ee 33
Fa
| <s6
YEL
RS
10K 41
GRAY
WHT-BRN
BLK
J2, 13,34 85 Si
5 SHIELO
=Si BRN
VIOLET
—e
— TAN
GRN-WHT
—
—yp BRN - WHT
=="
el =
= ORG
| BLK
—| GRN
= BLU
—t RED
—| WHT
42
Jus
PART OF
HANG-UP BOX
43
—F BRN
SPEAKER
INSERT UNDER SCREW ON
BACK PLATE OF CONTROL HEAD
CONTROL CABLE
pee 29
FOR IGNITION
SWITCH CONTROL
4. DISCONNECT BLK (W6)
JUMPER,S-H
2. CONNECT (W7) BETWEEN
“S" RELAY TERMINAL AND
ACCESSORY TAP ON IGNITION
(2 VOLT BATTERY
POSITIVE OR
NEGATIVE GROUND
OPTIONAL ACCESSORIES
PARTIAL DIAGRAM OF
RCVR. QUIK~ CALL UNIT
PLACING HANDSET OR MICROPHONE
IN HANG—UP BOX MOVES
CONTACTS TO LEFT.
SPRING ACTION RETURNS
CONTACTS WHEN HANDSET
OR MICROPHONE IS PICKED UR
SHIELD |
VIOLET
4a
BLU ‘ eas ee
REO <2 qe BRAID
WHT YEL-GRN
324
= RED SHIELDED
BRR WAT eee —=
E | | ORG SHIELDED
BRNBLUE oes —————
BLK a qf REO
ORG tag | WHT- ORG
M445 14 OR
GRN
BRN
POWER SUPPLY TRANSMITTER
i rot RED-BLU
+400 voc |
7 REO-YEL
A TRANSISTORS
TRANSFORMER
BLK- WHT
POLARITY a +275voc on!
REVERSING
TERMINALS ee +200 voc
K NETWORKS |
BL |
|
TRANSMITTER
» 400VOC B+
ober VOC 8+(144-474MC MODELS ONLY)
REO-GRN
RED-YEL
POLARITY REVERSING TERMINALS
SHOWN FOR NEGATIVE BATTERY GROUND
(BLK TERMINAL TO ARROW).
FOR POSITIVE BATTERY GROUND, =$3v0e
REVERSE THE TWO TERMINALS
(REO LEAD TO ARROW )
GRN- RED
BLK-WHT
275V0C B+ (25-54 MC MODELS ONLY)
+A SCREEN
PA GRID BIAS
‘SOVDC OSC. PLATE & SCREEN
GRN-YEL
WHT
BRN -YEL
ANT, CONNECTOR
ON FRONT cana
ean
MIC AUDIO —®>
PUSH-TO-TALK
FREQ. 2 ‘ORG SHIELDED.
SWITCHED B+
SQUELCH
4— RCVR AUDIO
RCVR FILS s2V0C
1415
— — — FREQ. 2 OSC. CATHODE
—# FREQ. 4 OSC CATHODE
OLS Se
21S)
=e,
lt
A
© ©
a
SWITCHED B+ eae ae
—> PINS, METER PLUG
— — — —J— _1— — —> FREQ! OSC. CATHODE
47-4/2W__ BLK
4 BLKCWHT
B+ TO 2ND. LIMITER
NOISE AMPL. CATHODE
RECEIVER
= i
FILS
— — — — —FREQ,2 OSC CATHODE
RECEIVER
fyeur¢— 46) if
REVISIONS
RE
iene| sere [evi] _cHance [Location
TLN6155A 2-FREQ. RCVR. TERM.
RCVR. FILTER KIT BOARD ON
MINOR CHANGES
IN POWER SUPPLY
Rear Mount Radio Set
Intercabling Diagram
Motorola No. 63E856644-B
11/3/59-RCS
AEPD-1696 (CE1135-B) (CE1317-A)
AA
Fo
Pod
A)
TRANSMITTER
MODEL TTD1060 TRANSMITTER
MODEL CHART
CRYSTALS
REQUIRED
TTD1060AA
TTD1060AB
1. DESCRIPTION
The transmitters listed in the model chart
are FM transmitters which operate on crystal-
controlled frequencies within the 144-174 mc
band. A separate power supply provides the
transmitter operating voltages to produce an rf
power output of 25 watts.
MOTOROLA INC.
Engineering Publications
11/3/59-RCS
4501 W. Augusta Blvd.
The single-frequency transmitter consists of
a crySstal-controlled oscillator, an angular phase
modulator, four stages of frequency multiplica-
tion and a finalamplifier stage. The fundamental
crystal frequency is multiplied 24 times to pro-
vide the final rf amplifier output frequency.
The two-frequency transmitter is the same
as the single frequency model except that a sec-
ond crystal oscillator, with control crystal, is
used. Transmissions are made on two specific
crystal-controlled frequencies in the 144-174 mc
band. Only one frequency can be transmitted at
atime. An external switch is required for chang-
ing frequencies and is ordinarily incorporated
into the control unit used with the transmitter.
This switch causes the desired oscillator to
function by grounding its cathode.
COMMUNICATIONS DIVISION
Chicago 51, Illinois
68P856650-A
PARTS LIST for Intercabling Diagram 63E856644-B
AMPLIFIER, AF:
Al 1V861317 microphone pre-amplifier:
assembly, includes:
1V859594 BOARD, circuit:
eyeleted; assembly; includes
soldering lug terminals
Reference parts Cl, Ql, R5,
R6, R7, R8
CAPACITOR, fixed: electrolytic;
cl 23C855013 tubular; 20 uf +100-10%; 25 vdew
or 23B844927
c2 23C855013 tubular; 20 uf +100-10%; 25 vdew
c3 same as C2
CARTRIDGE, microphone:
DP1 59C852603 magnetic; dynamic type; 175 ohm
impedance at 1 kc
LAMP, incandescent:
DS1 65R4151 6-8 volt; .2 ampere; single contact
bayonet base; globular glass;
type 51
DS2 same as DS!
FUSE, cartridge:
Fl 65R52281 one time; glass; 1 ampere; 250 v;
1-1/4" long x 1/4" dia.
F2 65K52482 one time; paper; 20 ampere; 250 v;
2" long x 9/16" dia.
CONNECTOR, receptacle: female;
qi 1V855055 assembly: includes mounting
bracket and single contact,
coaxial connector
32 9B855150 9 contact; polarized; round molded
black phenolic insulator saddle
mounted
33 same as J2
J4 same as J2
J5 9K82810 2 contact; rectangular molded black
bakelite insulator; chassis
mounted
J6 9B16345 4 contact; polarized; round molded
black phenolic base; chassis
mounted; includes:
457699 LOCKWASHER:
13/16" internal
2K81180 NUT, ring
LEAD, electrical: jumper;
Jul or reference only
Ju2 for reference only
JU3 for reference only
JU4 for reference only
RELAY, armature:
Kl 59K858480 12 v de; contact arrangement,
1 form "A"; coil resistance
76. 5-93.5 ohm
MICROPHONE, dynamic:
MK1 TU353A palm type; contains transistor am-
("plug-in") plifier and "push-to-talk"
switch; includes reference parts
Al, DPI, Wil
lor 1V852400 palm type; contains transistor am-
(“wired-in") plifier and "push-to-talk"
switch; includes reference parts
Al, DP1, Wl0
‘CONNECTOR, plu,
Pl 9C801050 female; 19 contact; polarized;
rectangular; molded mica filled
phenolic base; cable mounted;
connects to Power Supply; does
not include the following
284474006
28A16370
48A124317
17K892469
18K855108
18K855107
6R6336
6R6080
6R5581
6R5660
6R5621
6R488016
6R5550
40B858304
40A80248
314890699
1V832061
CONNECTOR, plug: (continued)
component parts which must be
ordered separately:
15B800676 SHELL, connector
15B800674 COVER, connector
shell
144800673 INSULATOR, con-
nector shell: small
14B800678 INSULATOR, con-
nector shell: large
424800667 CLAMP, cable
424800669 CLAMP, cable
4A11722 WASHER, "'C"'
4A800671 WASHER
3B800681 SCREW, connector
retaining: includes knurled
knob
387209 SCREW, 6-32 x 1/8;
2 required
387362 SCREW, 6-32 x 1/2;
2 required
male; coaxial; round bakelite
wafer insulator; cable mounted
same as P2
same as P2
male; 4 contact; polarized; in-
cludes metal shell and
41K838823 SPRING, cable
strain relief
TRANSISTOR:
type MN60; does not include
144861196 INSULATOR:
insulator must be ordered
separately
RESISTOR, fixed: carbon; +10%;
1/2 w; ins.; unless otherwise stated
wire-wound; 4 ohm #2%; 1 w
variable: wire-wound; 20 ohm
+20%; 2 w
variable: wire-wound; 10K; 2 w
270 ohm; 1 w
4.7K
3.3K
180 ohm
10 ohm
33 ohm; 2w
47 ohm
same as R10
SWITCH, toggle:
spst
spdt; does not include 2S8382 NUT
machine: 15/32-32 x 9/16"
hex; 2 required; nuts must be
ordered separately
BOARD, terminal:
6 screw terminals
CABLE ASSEMBLY, special purpose:
includes reference part Pl and the
following items:
30C830032 CABLE: 12 con-
ductor; stranded, i
leads; shielded; black plasti
covered; 17 ft, length req'd.
20K890418 CONNECTOR, plug
male; single contact; pin
type; cable mounted; coded
#18
also includes the following con-
nectors which are the same
as above part number
29K890418 except for coding
as indicated:
REFERENCE
SYMBOL
MOTOROLA
1V859441
1V859428
424858471
1V859446
Part No.
29K890419
29K890420
29K890421
29K890422
29K890427
29K890428
29K890429
29K890430
29K890432
29K890433
29K835340
also includes:
424893468 CLAMP, cable;
“wrap around"; strain
relief
424893464 HOOK, "'S'"':
strain relief
294824151 LUG, slotted
tongue: for #10 stud and
#10 wire
30K831572 CABLE, power:
single conductor;
stranded; insulated;
coded BLK; one 17 ft.
and one 4 ft. length req'd
29K824154 LUG, ring ton-
gue: for #10 stud and
#10 wire
29K830073 LUG, ring ton-
gue: for 5/16" stud and
#10 wire
assembly consisting of ''in line"
fuseholder with attached con-
necting leads: includes refer-
ence part XF1 and the following|
items:
29K824456 LUG, ring tongue:
for #10 stud and #18 wire
29K890406 CONNECTOR, plug:
male; single contact; pin
type; coded #6
LEAD, electrical:
includes:
10M488285 WIRE, electrical:
#20 ga.; stranded; ins. ;
coded GRN-WHT; 68"
length required
29K890405 CONNECTOR,
plug: male; single contact;
pin type; cable mounted;
coded #5
29K824456 LUG, ring tongue:
for #10 stud and #20 wire
CABLE, power:
consists of a brass strap 2-3/4"
long x 5/8"' wide x . 015" thick;
processed and plated
includes;
30K813233 CABLE, power:
single conductor; #10 ga.;
stranded; ins.; coded RED;
5 ft. length required
29K830073 LUG, ring tongue
for 5/16" stud
29K824154 LUG, ring tongue
for #10 stud
MOTOROLA
LEAD, electrical:
1V830177 Relay Jumpe $
10M370 WIRE, electrical:
single conductor; #12 ga. ;
stranded; ins.; coded
BLACK; 4" length req'd
29A824151 LUG, slotted
tongue: for #10 stud and
#12 wire; 2 req'd
1V847414 Ignition Switch Control: includes:
10M430 WIRE, electrical:
single conductor; #20 ga. ;
str.; ins.; coded BLACK;
5 ft. length required
29K824456 LUG, ring tongue
2 supplied
LINE, RF, transmissi
1V813547 coaxial; includes:
30B475378 CABLE, RF:
coaxial; RG-58A/U; 5-1/2"
length required; reference
parts J] and P2
1K800193 coaxial; includes:
30B475378 CABLE, RF:
coaxial RG-58A/U; 2 ft.
length required; reference
parts P3 and P4
CORD, microphone:
1V854006 includes:
("wired- 30K852742 CORD, coiled;
in" mic. ) tinsel; 4 conductor
41A852707 SPRING, strain
relief
11M2506 TUBING, extruded,
#9 BLK; 1" length required
294847033 LUG, terminal;
wire mounted; insulation
piercing; 8 required
1V854034 includes:
("plug-in" 30K852742 CORD, coiled;
mic. "') tinsel; 4 conductor
41A852707 SPRING, strain
relief
11M9578 TUBING, extruded;
#8 CLEAR; 2" length req'd
294847033 LUG, terminal;
wire mounted; insulation
piercing; 4 required
29A847034 LUG, terminal;
wire mounted; insulation
piercing; 4 required
37K480513 SLEEVE, rubber
Reference part P5
MOTOROLA DESCRIPTION
PART No.
NON-REFERENCED ITEMS (cont'd)
MOTOROLA
PART No. DESCRIPTION
NON-REFERENCED ITEMS (cont'd)
FUSEHOLDER:
9K847158 cable mounted; male and female
retainer; single fuse mounting;
includes #18 ga. wire leads,
stranded, insulated, coded
BRN; length 68" overall for
1-1/4" long x 1/4" dia
fuse; includes ref. part F]
67K892616 chassis mounted; clip type; single
fuse mounting; porcelain base;
for 2" long x 9/16" diameter
fuses
NON-REFERENCED ITEMS
The following are replaceable parts which do
not appear on the intercabling diagram
LAMPHOLDER:
9A855117 single contact miniature bayonet
base
same as XDS1
Control Heads
Items which are common to all control
heads are listed first. Items which are
not common to all control heads are listed
under the model number of the particular
control head concerned.
Items common to all control heads
include reference parts DS1, DS2,
J2, J3, J4, J5, Ri, R2, R3, RY,
$1, TBl, XDS1, XDS2, plus the
following:
288382 NUT, machine: 15/32-32 x 9/16"
hex; 2 required
61B859620 LENS, indicator: RED
61K859621 LENS, indicator: GRN
457691 LOCKWASHER: 3/8" internal
258364 NUT, machine: 3/8-32 x 1/2"
hex; 2 required
644857162 PLATE, connector mounting
(back cover)
38122518 LOCKSCREW: 4-40 x 3/16" plain
hex head; 2 required
38124542 LOCKSCREW: 6-32 x 3/4" plain
hex head; 4 required
36B855027 KNOB, control: 2 required
7B855239 BRACKET, control head mounting}
1V859999 MOUNTING HARDWARE KIT;
includes:
4K847649 WASHER, fiber:
2 required
4S7670 LOCKWASHER: 1/4''
internal; 2 required
35129304 SCREW, machine:
1/4-20 x 1/2" slotted oven
head; 2 required
Each control head model includes the
items shown for the model, plus items
which are common to all.
TCN6001AA ( 1-freq. with ''wired-
~~qn" microphone); includes the
following items:
1V852400 MICROPHONE (reference part
MK1)
13D859614 ESCUTCHEON
38A857093 BUTTON, plug
37K106352 GROMMET, rubber; for 7/16"
diameter hole
1V 16241 MOUNTING KIT, microphone:
includes:
64485596 BRACKET,
microphone hang-up
38122830 SCREW, tapping:
#8 x 1/2" slotted binder
head; 2 required
TCN6001AB ( 2 freq, with ''wired-
in" microphone):
includes reference part S2 and
the following items:
1V852400 MICROPHONE (reference part
MK1)
13D859615 ESCUTCHEON
384857093 BUTTON, plug
37K 106352 GROMMET, rubber: for 7/16"
diameter hole
1V 16241 MOUNTING KIT, microphone:
includes:
64485596 BRACKET,
microphone hang-up
35122830 SCREW, tapping:
#8 x 1/2" slotted binder
head; 2 required
TCN6001AE ( 1-freq. with
receptacle for "plug-in"
microphone);
includes reference parts J6, R4
and the following items:
13D859614 ESCUTCHEON
487691 LOCKWASHER;: 3/8" internal
29R5279 LUG, soldering: 7/8"
TCN6001AF ( 2-freq. with
receptacle for 'plug-in"’
microphone):
includes reference parts J6,
R4, S2 and the following
items:
13D859615 ESCUTCHEON
487691 LOCKWASHER: 3/8" internal
29R5279 LUG, soldering: 7/8"
Microphones
Items common to both ''wired-in'"'
microphone and "'plug-in'"'
‘™microphone include reference part
“Al and the following:
1V 854005 BACK HOUSING AND HANG-UP
STUD ASSEMBLY
40B857174 SWITCH, push; dpst
38124693 LOCKSCREW: 6-32 x 1/4";
Phillips round head; 3 req'd
STRAP, strain relief
BUTTON, push
FRONT HOUSING
GRILLE
CLOTH, grille
EMBLEM, MOTOROLA trade
mark
GASKET, rubber
INSULATOR: used for insulating
printed circuit assembly
CLAMP, used for securing
microphone cartridge
REFERENCE MOTOROLA
SYMBOL PART No
NON-REFERENCED ITEMS (cont'd)
144857137
4K852762
35127924
38127481
45400386
33K852697
33K852698
1V16241
INSULATOR: used between clamp
and microphone cartridge
WASHER, insulating; used as a
spacer
LOCKSCREW: 6-32 x 5/16";
Phillips round head
SCREW, machine 6-32 x 7/8";
Phillips round head; 2 req'd
LOCKWASHER: #6 split; 2 req'd
Items used in 1V852400 "'wired-in"’
microphone only include reference
part W10 and the following:
NAMEPLATE, model identifi-
cation
Items used in TU353A "plug-in"
microphone only include reference
part W11 and the following:
NAMEPLATE, model identifi-
cation
Mounting Kit, microphone:
includes:
64485596 BRACKET, micro-
phone hang-up
38122830 SCREW, tapping:
#8 x 1/2" slotted binder
head; 2 required
TKN6006A Cable Kit
1V859447
includes reference parts F2, Kl,
W1 to W7, plus the following:
INSTALLATION KIT: includes:
“358153 SCREW, tapping:
#8 x 3/4" plain hex head;
3 required
387542 SCREW, tapping:
#8 x 3/8" slotted binder
head; 4 required
42A19376 CLAMP, cable:
4 required
37K107234 GROMMET, rubber
||
|
AEPD- 1696 (CE1135-B) (CE1317-A)
7
TRANSMITTER
MODEL TTD1060 TRANSMITTER
MODEL CHART
CRYSTALS
REQUIRED
ONE RN1-A
TWO RN1-A
1. DESCRIPTION
The transmitters listed in the model chart
are FM transmitters which operate on crystal-
controlled frequencies within the 144-174 mc
band. A separate power supply provides the
transmitter operating voltages to produce an rf
power output of 25 watts.
MOTOROLA INC.
Engineering Publications
11/3/59 -RCS
4501 W. Augusta Blvd.
The single-frequency transmitter consists of
a crystal-controlled oscillator, an angular phase
modulator, four stages of frequency multiplica-
tion and a finalamplifier stage. The fundamental
crystal frequency is multiplied 24 times to pro-
vide the final rf amplifier output frequency.
The two-frequency transmitter is the same
as the single frequency model except that a sec-
ond crystal oscillator, with control crystal, is
used. Transmissions are made on two specific
crystal-controlled frequencies in the 144-174 mc
band. Only one frequency can be transmitted at
atime. An external switch is required for chang-
ing frequencies and is ordinarily incorporated
into the control unit used with the transmitter.
This switch causes the desired oscillator to
function by grounding its cathode.
COMMUNICATIONS DIVISION
Chicago 51, Illinois
68P856650-A
GUARANTEED PERFORMANCE SPECIFICATIONS
BASIC UNIT TTD1060 (144-174 mc)
CRYSTAL aera Aa ee
MULTIPLICATION wenty -four (24) times
POWER SUPPLY 12 v de operation, positive or negative ground
SPURIOUS AND All spurious and harmonic emissions are attenuated at least 60 db
HARMONIC EMISSION below carrier level.
FREQUENCY STABILITY Oven type crystal unit maintains carrier within +.0005 percent of
AND TEMPERATURE assigned center frequency from -30°C. to +60°C. ambient (+25°C.
RANGE reference).
40F3: +15 kc for 100 percent at 1000 cps
MODULATION 20F3: +5 kc for 100 percent at 1000 cps
Factory connection: 0.25 volt +3 db for 100 percent modulation at
AUDIO INPUT 1000 cps (approximately -17 db).
LEVEL Optional connection: 0.18 volt +3 db for 100 percent modulation at
1000 cps (approximately -20 db).
(1) 6CB6 - RF Oscillator (1-Freq) (1) 6AK6 - 2nd Doubler
or (2) 6CB6 - RF Oscillators (2-Freq) (1) 2E26 - Doubler Driver
(1) 12AT7 - Modulator, Buffer- (1) 6146 - Final Amplifier
Doubler (1) 6BH6 - IDC Amplifier
(1) 6CB6 - Tripler (1) 6AL6 - IDC Clipper
TUBE COMPLEMENT
AND FUNCTION
NUMBER OF 9 following the modulator including 4 tuned multiplier stages,
TUNED CIRCUITS and output circuit
395 v dc at 150 ma
PLATE VOLTAGE 270 v dc at 105 ma
REQUIREMENTS 150 v dc at 18 ma
-20 v dc bias
DIMENSIONS 15'"' long x 2-3/8'' wide x 5-1/4" high, overall
WEIGHT 4-1/4 lbs.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
FCC License Designation: CC3012
63C856651-O
A two-frequency transmitter can be operated
on frequencies whichare separated byas much as
300 kc from circuit resonance without degradation
of the single-frequency performance specifica-
tions. All tunedcircuits following the oscillators,
are normally aligned to the higher, or preferably
to the more often used of the two carrier fre-
quencies.
2. CONTROL CRYSTAL REQUIREMENTS
Control crystals, as listed in the MODEL
CHART, are required for use with these trans -
mitters and should be ordered separately. See
the FOREWORD of the manual for ordering
information.
3. CIRCUIT OPERATION
Stage-by-stage signal flow and operating fre-
quencies are shown on the Block Diagram, num-
ber 63C856651. Refer to this diagram and
Schematic Diagram number 63E856652 to trace
the following circuit operation:
a. Audio Input and Amplifier Stage
A MOTOROLA dynamic microphone with
built-in transistorized pre-amplifier is usually
used with this transmitter. The microphone
on =a
; CRYSTAL |
| Y 201 |
| fo |
BSA Ses!
mya. NOTE 4
[ crysta
| OSciLLATOR |
|. _v2o1__|
|
|
|
|
BUF FER-
DOUBLER
| teat?
V102B
CRYSTAL
OSCILLATOR
6CB6
V101
MODULATOR
Vp A2ATT
V1I0°A
CRYSTAL
Y 10°
fo
AUDIO
NOTE
AUDIO
AMPLIFIER
6BH6
CLIPPER
6AL5S
V108
AUDIO
INPUT
V107
LEGEND —
TRIPLER
6CB6
V103
connects between ground and the shielded lead of
the audio amplifier input circuit. A well-filtered
dc voltage source of approximately 15 volts con-
nects to R117. This voltage is dropped through
resistors R117 and R118 toa value of approxi-
mately 4'v dc providing operating power for the
transistorized (or carbon) microphone. The mi-
crophone cartridge and pre-amplifier act like a
variable voltage generator. The output voltage
varies with the intensity and frequency of the
sound waves which strike the diaphram. Rea-
sonably loud sounds produce an output of 0.25
v ac, which provides full deviation of the rf
carrier. If increased sensitivity is desired, a
tap can be changed (see schematic diagram, note
6) to provide full deviation of the transmitter with
a 0.18 v ac audio signal.
b. Audio-IDC Circuit
Microphone audio output is applied to the
clipper tube where the peaks are clipped then the
audio is connected to the IDC (instantaneous
deviation control) circuit. This circuit limits
the slope (steepness) of the audio signals which
pass through it, as illustrated in Figure 1. (Note
that the clipped waveform is not observable, but
is included to show the transition between input
and output.) The IDC control sets the amplitude
of the signals thereby limiting the maximum
2ND DOUBLER- POWER
DOUBLER DRIVER AMPLIFIER
6AK6 2626 6146 OUTPUT
v104 V105 V106
TEA
Y201 &@ V20!1 USED ON TWO FREQUENCY MODELS ONLY.
fos OSCILLATOR FREQUENCY = 6.000-7.250 MC.
fc= CARRIER FREQUENCY « 144-174 MC,
te
1524
fe= 24 fo
BLOCK DIAGRAM
AEPD-1697-A (CE1135-A) (CE1604-B)
FINAL METER READINGS
Each time a transmitter is aligned or tested, final meter readings should be made and entered in
a logbook.
All readings given in the table below are minimum except. PA, which is maximum. DO NOT ex-
ceed the value given for the PA current. This is the maximum plate current to which the unit can be
safely tuned.
Readings 1 through 6 are purely relative and do not give actual current or voltage measurement.
When using the P-8500 or the P-8501 series test sets, position7 is ad-c voltmeter with 1000 volts
full scale. Actual B+ reading is obtained by multiplying the microampere scale reading by 20. The
TU546 series test sets have a 0-1000 volt d-c scale from which the B+ is read directly.
When using the P-8500 or the P-8501 series test sets, position 8 indicates d-c relay control volt-
age when the transmitter is not keyed. Multiply the microampere scale reading by 0.3 to obtain the
actual value of the d-c voltage. When using the TU546 series test sets, the relay control voltage is
read directly with the position selector switch in position 10.
For all three series portable test sets, multiply the scale reading by 5 to obtain the actual PA
plate current in milliamperes.
P-8500 &
SWITCH P-8501 SERIES
POSITION
TTD1060 Transmitter Alignment Procedure
Motorola No. EPD-1698-A
11/3/59-RCS
AEPD-1697-A (CE1135-A) (CE1604-B)
ee
NOU pw
PRE-ALIGNMENT NOTES
EXCERPTS FROM F.C, C. REGULATIONS
Radio transmitters may be tuned or adjusted only by duly authorized radio Operators or by per-
sonnel working directly under their supervision.
The RF power output of a station shall be no more than required for Satisfactory technical oper-
ation considering the area to be covered and the local conditions.
TEST EQUIPMENT REQUIRED
MOTOROLA Portable Test Set (P-8500 series, P-8501 series or TU546 series)
MOTOROLA K-9322 Alignment Tool Kit
MOTOROLA T1034A Series Frequency Monitor (for oscillator alignment and deviation
adjustment)
RF wattmeter or dummy antenna
Power Supply (preferably the one designed for the transmitter under test)
HOW TO SET UP THE P-8500 SERIES AND THE P-8501 SERIES TEST SETS
Connect the dummy antenna or RF wattmeter to the transmitter ANT. jack.
Connect the test set cable plug to the transmitter METER jack.
Place the test set REC. - XMTR. -0-50 UA switch inthe XMTR. position.
Place the GRID CURRENT-METER-FIELD STRENGTH switch in the METER position.
Connect the power supply to the transmitter as shown on the intercabling diagram for the equip-
ment.
If the power supply chassis has a HI-LO switch place it in the LO position.
Turn the equipment on. Allow 30 seconds for the tubes to warm up.
HOW TO SET UP THE TU546 SERIES TEST SET
Connect the dummy antenna or RF wattmeter to the transmitter ANT. jack.
Connect one end of the metering cable to the test set and the other end to the transmitter METER
receptacle.
Place the Function Selector Switch in the XMTR. position.
Place the oscillator and meter reversing switch in the OFF position.
Connect the power supply to the transmitter as shown on the intercabling diagram for the radio set.
Place the HI-LO switch on the power supply in the LO position.
Turn the equipment on. Allow 30 seconds for the tubes to warm up.
P-8500 &
P-8501
TU546
Series 1
, ; Tripler Doubler PA
Circuit Griq |Doubler Plate Driver
Metered Grid Current Grid Voltage
TEST SET SWITCH POSITIONS
PA
Series
HOW TO KEY THE TRANSMITTER
Use the XMTR-ON switch of the test set to place the unmodulated carrier on the air for meter
reading and adjustment.
Use the MOTOROLA TU353A Microphone (or equivalent) to key the transmitter and modulate the
carrier as required.
CAUTION
Do not key the transmitter for more than a few seconds at a time until
it is properly tuned. Plate current is excessive in untuned stages and
may damage the unit. Turn the transmitter on for brief periods while
reading the meter and making the adjustments.
FREQUENCY CALCULATIONS
fc :
Mee fo = crystal frequency, and f, = carrier frequency
1,D.C. CONTROL SETTING
Set up the Frequency Monitor for voice modulation measurement. (If an oscilloscope is
available see text for 1,.D,C. setting using the scope. )
Turn transmitter on and modulate with 1000 cps tone.
Adjust the I.D.G. control (R130) on the transmitter chassis until the MODULATION DEVIATION
meter on the station monitor reads as outlined in the following paragraphs.
(a) When the transmitter is intended for operation on a 60 kc or 120 kc channel spacing, the
I,D.C., control should be adjusted for an approximate 17 kc reading on the station monitor
MODULATION DEVIATION METER. Note that the MODULATION DEVIATION METER
reads average voltage but is calibrated in peak voltage. The setting of 17 kc corresponds
to a peak of 15 kc.
(b) When the transmitter is intended for operation on a 30 kc channel spacing, the I. D.C control
should be adjusted for an approximate 5-1/2 kc reading on the station monitor MODULATION
DEVIATION METER,
SIEPM
C404, C201
OSCILLATORS
STEP 2
T4
{ST DOUBLER
TRIPLER
STEP 4
LiO6, L107
2ND DOUBLER
SiS
C119
DOUBLER - DRIVER
STEP 6
C124
POWER AMPLIFIER
STEP 7
C125
ANTENNA INPUT
STEP 8
COUPLING
SWITCH POSITION
TU546 TEST SET ADJUSTMENT
warm-up period
*
‘
Minimum
(Dip)
Maximum rf
ALIGNMENT PROCEDURE
METER
READING
On-frequency
Allow 15 min-
STAGE, CONDITIONS AND PROC
OSCILLATOR. Adjust only when primary or secondar
available (MOTOROLA T1034A may be used). Set 1
Adjust C101 for "on-frequency' reading on monitor. |
frequency transmitter adjust C201, same as above, ex
monitor to accept frequency No. 2. The adjustments i
should be made with the transmitter switched to the hi;
preferably to the frequency more commonly used.
1ST DOUBLER. Adjust primary slug from bottom. A
top. The circuit frequency is twice the crystal frequer
TRIPLER,. Adjust primary slug from bottom. Adjust
The circuit frequency is six times the crystal frequenc
meter switch in position 4.
ZND DOUBLER. Adjust L106 and L107 for maximum 1
frequency is twelve times the crystal frequency. Repe
position 5.
DOUBLER-DRIVER. Adjust C119 for maximum. Tun
meter will always show the fixed bias in this position.
indicates proper alignment. The circuit frequency is t
crystal frequency.
POWER AMPLIFIER, Set C125 for minimum plate cu:
adjustment fully clockwise (decoupled), Tune C124 for
HI-LO switch to HI.
ANTENNA INPUT. Adjust C125 for maximum meter 1
(150 ma).
ANTENNA COUPLING. Remove test load and connect
1. Using field strength meter:
Make adjustments with transmitter shielded a
Place rf probe near antenna. Adjust C125 an
indication on meter. Do not exceed 150 ma.
2. Without field strength meter:
Turn COUPLING counterclockwise (increasin;
C124 for dip. Increase coupling until only a s
overcouple. This causes the dip to disappear
Recheck setting of C125. DO NOT EXCEED |
L107 and C119. Tighten locknuts on C124.
STEP 4
C101, C201
OSCILLATORS
STEP 2
|
{ST DOUBLER
TRIPLER
STEP 4
L106, L107
2ND DOUBLER
SESE
C4119
DOUBLER - DRIVER
STEP 6
C124
POWER AMPLIFIER
SIEP 7
Ci25
ANTENNA INPUT
STEP 8
COUPLING
SWITCH POSITION
TU546 TEST SET ADJUSTMENT
C101
c201l
COUPLING
and C124 or
C125
ALIGNMENT PROCEDURE
METER
READING
Maximum
On-frequency
Allow 15 min-
utes crystal
warm-up period
Output
NOTE
DO ‘NOT
EXCEED
150 ma
STAGE, CONDITIONS AND PROCEDURE
OSCILLATOR. Adjust only when primary or secondary frequency standard is
available (MOTOROLA T1034A may be used). Set up frequency monitor.
Adjust C101 for ''on-frequency"' reading on monitor. When aligning a two-
frequency transmitter adjust C201, same as above, except set frequency
monitor to accept frequency No. 2. The adjustments in Steps 2 through 8
should be made with the transmitter switched to the higher frequency or
preferably to the frequency more commonly used.
1ST DOUBLER. Adjust primary slug from bottom. Adjust secondary slug from
top. The circuit frequency is twice the crystal frequency.
TRIPLER. Adjust primary slug from bottom. Adjust secondary slug from top.
The circuit frequency is six times the crystal frequency. Repeak T1 with the
meter switch in position 4.
2ND DOUBLER. Adjust L106 and L107 for maximum meter reading. The circuit
frequency is twelve times the crystal frequency. Repeak T2 with the switch in
position 5.
DOUBLER-DRIVER. Adjust C119 for maximum. Tune for a definite peak. The
meter will always show the fixed bias in this position. A definite peak reading
indicates proper alignment. The circuit frequency is twenty-four times the
crystal frequency.
POWER AMPLIFIER. Set C125 for minimum plate current. Turn COUPLING
adjustment fully clockwise (decoupled). Tune C124 fora dip. Set power supply
HI-LO switch to HI.
ANTENNA INPUT. Adjust C125 for maximum meter reading. Do not exceed 30
(150 ma).
ANTENNA COUPLING. Remove test load and connect antenna.
1. Using field strength meter:
Make adjustments with transmitter shielded as much as possible by housing.
Place rf probe near antenna. Adjust C125 and COUPLING for maximum rf
indication on meter. Do not exceed 150 ma.
Without field strength meter:
Turn COUPLING counterclockwise (increasing) gradually while retuning
C124 for dip. Increase coupling until only a slight dip is apparent. DO NOT
overcouple. This causes the dip to disappear and reduces power output.
Recheck setting of C125. DO NOT EXCEED 150 ma. Repeak Lise lero:
L107 and C119. Tighten locknuts on C124.
FINAL METER READINGS
Each time a transmitter is aligned or tested, final meter readings should be made and entered in
a logbook.
All readings given in the table below are minimum except PA, which is maximum. DO NOT ex-
ceed the value given for the PA current. This is the maximum plate current to which the unit can be
safely tuned.
Readings 1 through 6 are purely relative and do not give actual current or voltage measurement.
When using the P-8500 or the P-8501 series test sets, position? is ad-c voltmeter with 1000 volts
full scale. Actual B+ reading is obtained by multiplying the microampere scale reading by 20. The
TU546 series test sets have a 0-1000 volt d-c scale from which the B+ is read directly.
When using the P-8500 or the P-8501 series test sets, position 8 indicates d-c relay control volt-
age when the transmitter is not keyed. Multiply the microampere scale reading by 0.3 to obtain the
actual value of the d-c voltage. When using the TU546 series test sets, the relay control voltage is
read directly with the position selector switch in position 10.
For all three series portable test sets, multiply the scale reading by 5 to obtain the actual PA
plate current in milliamperes.
P-8500 &
SWITCH P-8501 SERIES
POSITION
TU546 SERIES
METER READING
TTD1060 Transmitter Alignment Procedure
Motorola No. EPD-1698-A
11/3/59-RCS
e eu
‘ : ; ies
‘ an , ; " s .
/ a
@ _
——_ ; |
a
: é: - i
u \ :
:
‘
;
y
"
Pig
mid
c
> -
AEPD-1690-A (CE1135-A) (CE1605-C)
Co SS aa ee qV
‘
|
|
i}
‘
\
} : '
H !
!
|
i}
| :
c9 R127 |
100 L-~—--~|--—--|- ----J
22
Pwr, Sur. Ps REVISIONS
M SSSUE J lame SUEF INAS e® | syMBOL |e. SHANCE Aint) © LOCATION
A [| rrpi0soaa-1
TTD1060AB-1
TTDIO60AA-2
11 W. =
PP [erpicccane A RU2 . |wAS 27 [iets |
Cc TTDIO60AA-3
C105 WAS 3.3 uuf V102A-2
GRID)
CHASSIS MARKINGS
ADDED TO DIAGRAM
Aas ae nee
CRYSTAL 7
HEATER |
MOTE Y 101 !
8
: CRYSTAL /|ci40
: HEATER
NOTES
(|)s i
RI34
10 "39 NOTE (0
2W
108 Vv 104
4 3 4
107
4
V103
af \3
CI32 C18 CuT
‘O2uF Taso ‘T2s0
= oer Y
TTD1060 Transmitter
Schematic Diagram
Motorola No. 63E856652-D
11/3/59-RCS
—s. ve
eS
o
7) Pe
weak el? Qiorents?D
i» sieges “= Dattaly
; 6.2 0L92544
jaagst act waadh
ratio Abe PT
aa ere te SiN
iin pa EI
& otal oi alas mee YT "
AEPD-1690-A (CE1135-A) (CE1605-C)
Y{04 (4-FREQ.)
POST,MOUNTING
46K848989
= CLAMP, CRYSTAL
C204 . - 41A850844
OSCILLATOR : C104 OSCILLATOR
v20i =e vid
SHIELD, TUBE SHIELD, TUBE
26K890035 26A881244
vAo2
PLATE,COVER
644840759
Fae RO" IDC"CONTROL)
TT
— 1ST DOUBLER
Y204(2-FREQ.)
-
SHIELD, TUBE
26A890034
vi03
vi04
LiO6 2ND DOUBLER
FASTNER,CLIP
42A821724
CLIP, BOX COVER
42A8241722
cus i SHIELD, WRAP AROUND
DOUBLER 26C858097
DRIVER
SHIELD, COVER
15A859683
ci25
ANTENNA INPUT
FASTNER, CLIP
42A821721
CLIP, BOX COVER
ee | rare 42A821722
POWER 9 “@: 102
AMPLIFIER | — RECEPTACLE INPUT
J104
RECEPTACLE INPUT
AEPD-1690-A
V 101
OSCILLATOR 1
6CB6
BRN- R203 NOTE 8
EREQUENCY 1 apE5 VA |
Nee e204 _|c208
Buf ee
170V
o
6CB6
V102A v102B V103 V104 V105
MODULATOR BUFFER- TRIPLER 2ND. DOUBLER DOUBLER-
1/2 12AT7 DOUBLER 6CB6 6AK6 DRIVER
1/2 12AT7 2E26
240v men 230v T1(AA5) 240 T2(8F9) 250" ~22V 250V
a Ls a
#4107
(AaB)
L106
(AAT)
nov 155V
oO o
3103-4 J103-5
(METER) (METER)
J103-3 PWR SUP TB
(METER) PIN?
’
PwR. SUP. T.B.
PINT
32> WHT-ORG.
CLIPPER ae
6AL5 5 >-LWHT.-GRN
*s 6> | WHT -BLU TERMINAL
IDENTIFICATION
T1872
Tey
YEL-GRN
c131 RI33 ' ¥
Ts 220K 2 eee aaa
+ 10> GR.
C123
| Our aise METER
J103
Vv 107
AUDIO
AMPLIFIER
6BH6
C127
{toeuF
120V
(3)
'
GND. '
~GRN I
o
mic. oc y e x
PWR SUF TB PuSH-TO- TALK (TEL GRN
N3 H “
NOTES B ++ \(pREO-BLU
. WO z
-YI
| aLu-BRN NOTES 8+ OK RED-YEL
1G) =
eee
SLU-BRN ___. FREQUENCY 2
NOTE 8 PIN 5 CRYSTAL
eee NOTE 8 SOCKET
SAS
2B)
pepe {es 1
(WH ; A H
2 viog wio7 Bee 3 ' Cy H
: i \
7 ; H |
= ©: (es Cay a ae oi . :
= GRN.-RED CRYSTAL ASSEMBLY
NOTE SIIBIAS CIRCUIT DETAIL
ANT. RELAY |(@)SEK WHT.
it
Mic 0c |(3) GaN WHT
2!
US
TERMINAL BOARD
P/O POWER SUPPLY
ates OO Cee. ee
vio2 vio3
BOTTOM VIEW OF CHASSIS
NOTES
V 106
POWER
AMPLIFIER
6146
COUPL
-42V sed INCK ce
NOK a
af O.tuH
act =e co
SRS nile 500
Sark $2.2 ab ‘Tez
4 MEG
5% 18
ce
+
le Y
RI3s
4
PWR. SUP. TB v103-8
INA 4 (METER)
J103-6 PWR SUP. T.8 PWR. SUP_T.B
(METER) PINS PIN 10
Y201
ee a eS SS |
! CRYSTAL
] HEATER !
i NOTES 1
UNLESS OTHERWISE STATED
RESISTOR VALUES ARE IN OHMS, #410%, (/2 WATT. K*1000 OHMS
CAPACITOR VALUES ARE IN MICROMICROFARADS
LEGEND: IRON CORE ADJUSTMENTS
TOP { BOTTOM TOP OR
TUNING TUNING BOTTOM TUNING
ALL MEASUREMENTS TAKEN WITH A VACUUM TUBE VOLTMETER WITH
RESPECT TO GROUND
ALL VOLTAGE MEASUREMENTS TAKEN WITH A {MEG RESISTOR IN
SERIES WITH THE METER LEAD
READINGS FOR vWi01 AND V20! TAKEN WITH FREQUENCY
SWITCH IN APPLICABLE POSITION
CAPACITOR C123 IS CONNECTED TO POSITION 1 AS SHIPPED FROM THE
FACTORY. CONNECT TO POSITION 2 IF GREATER AUDIO SENSITIVITY IS
ee? REFER TO THE TRANSMITTER INSTRUCTIONS FOR FURTHER
AILS.
GROUND CONNECTION IN ei Vege CIRCUIT USED ON
SINGLE FREQUENCY MODELS 0}
DASHED CIRCUITRY AND 200 SERIES COMPONENTS ARE
INCORPORATED ON TWO FREQUENCY MODELS ONLY.
B+ VOLTAGE: 270V
PA SCREEN VOLTAGE: 270V
8++ (HIB+) VOLTAGE: 395V
BIAS VOLTAGE: -20V
RESISTOR RI34 CONNECTED FROM BRN-YEL. TO BRN. FOR
TWO FREQUENCY MODELS. FROM BRN. TO GROUND FOR
SINGLE FREQUENCY MODELS.
MODEL TABLE
[ TTD 1060AA=3 | 1060AA-3 | 1-FREQ. |
[r101060a8-3 [2-FREQ.|
yeni CRYSTAL
if \s HEATER
—— eee
v102
'
1
'
1
REVISIONS
TTDIOS0AA-
60AB-2
TT
TTDIO60AA-
TTDI060AB-3
ODULATOR
GRID)
CHASSIS MARK
ADDED TO DIAGRAM
TTD1060 Transmitter
Schematic Diagram
Motorola No. 63E856652-D
11/3/59-RCS
ae oe es =
TA237W RECEIVER
Te Of | Channel
ana ae
TRD1170AA/ | TA237W-L 60 ke
TA237W TRD1172AA/
Cd
TRD1171AC/
eae
eres R2<H
TRD1171AB/
lg PG pe 30 ke
[See
Bae eal H
eee Eat
30 ke
TRD1170AD/ | TA237S-R2-L
The receivers listed in the model chart are
TA237S-R2 TRD1172AD/
TA237S-R2-H
designed to receive FM signals on one (or two)
TRDI170AC/
TA237W-R2
TRD1170AB/
TA237S
DESCRIPTION
Application
MOTOROLA INC.
AA
Engineering Publications
11/3/59-RCS
4501 W. Augusta Blvd.
RECEIVER
fixed, crystal-controlled frequencies inthe 144-
174mcband. The receivers obtain operating vol-
tages from the power supply which is part of the
overall radio set.
b. Design
The receiver incorporates a double-conver-
sion superheterodyne circuit. The chassis has
15 tubes and 18 tuned circuits, excluding the
plastic-sealed circuits of the "permakay" i-f fil-
ter. The i-f wave filter is the major factor in
determining the signal reception bandwidth. On
models designed for 30 kc channel spacing opera-
tion the signals are attenuated -100 db at +15 kc
On 60 kc models the signals are attenuated -100
Co ate o2 kt.
c. Basic Receiver Circuitry
The basic receiver circuit consists of the
following stages: an rf amplifier, a first local
oscillator, a first mixer, a first i-f amplifier, a
second local oscillator, a second mixer, three
second i-f amplifiers, two limiters, a discrimi-
nator and two stages of audio amplification.
d. Two-Frequency Models
Be NEE A RS,
Models which carry the -R2 suffix designa-
tion are two-frequency versions of the basic
Single-frequency receiver. The two-frequency
receiver is the same as the single-frequency re-
ceiver except for the addition of another first os-
cillator andcontrol crystal. Two-frequency mod-
els receive signals on two specific, crystal-con-
trolled frequencies in the band. Only one fre-
quency can be received at atime. The two-fre-
quency receivers are aesigned for operation witk
COMMUNICATIONS DIVISION
Chicago 5], Illinois
68P862485-O
PARTS LIST for Transmitter Diagram 63E856652-D
MOTOROLA
PART No.
21B801139
21K852259
21K851767
21R124554
21K840850
21K840847
19K859115
21K859119
21K848156
21K840 848
215800801
23K892117
21K840046
21A112247
21A824948
19K800032
21K835358
19B858032
23K890624
21B401029
21K859773
21K848158
21R410115
21K840047
21K840850
23K857384
CAPACITOR, fixed: uuf; 500 vdcw;
unless otherwise stated
NOT USED
NOT USED
. 01 uf +80-20%; 600 vdcw
same as C3
same as C3
same as C3
feed-thru; 18 +5%
feed-thru; 18 +5%
22 5%
4+.5 uuf
5 +.5 uuf
variable; 3-32
10 +.5 uuf
same as C3
30 +5%
6 +.5 uuf
1500 GMV +100% max
elec; consists of:
20 uf +50-10%; 450 vdcw
Q& 10 uf +50-10%; 450 vdcw
O 10 uf +100-10%; 25 vdcw
100 +10%
same as C106
same as C3
same as C3
same as C106
same as C106
250 410%; 850 vdcw
500 +20-10%; 600 vdcw
same as C3
same as C1l4
same as C1l4
variable: 2.6-19.7
15 10%
NOT USED
same as C115
same as C3
variable: 5.5-33.5
same as C119
elec; 5 uf +100-15%; 150 vdcw
.02 uf +80-20%; 600 vdcew
same as C127
same as C3
2500 +5%
390 410%; 300 vdcw
same as C127
220 +20%
150 +5%
NOT USED
4+.5 uuf
same as C136
NOT USED
same as C3
same as C127
same as C106
same as C101
same as C102
same as C134
elec; 5 uf +100-10%; 150 vdcw
same as C204
NOT USED
same as C106
same as C106
REFERENCE MOTOROLA
SYMBOL PART No. DESCRIPTION
CONNECTOR, receptacle: female;
9487120 “single contact; round molded
mica filled base; chassis
mounted
same as J101
9B880881 11 contact; polarized; round
molded black phenolic base;
saddle mounted
RELAY, armature:
12 v de; non-coaxial; contact
arrangement, 1 form ''C"
59K854405
NOTE
Relay K101 is mounted inside
1V840693 ASSEMBLY, shield
(includes J101, J102); shield
assembly must be ordered
separately
COIL, RF:
NOT USED
1V835418 Doubler Driver Plate; includes
C119
244891063 choke: 1,3 uh; coded BLU dot
1V859750 Power Amplifier Grid
24A858031 Power Amplifier Plate; includes
L6
same as L3
24A852574 Filter; .1 uh
24K847941 choke; 5.7 mh; coded BRN-YEL
NOT USED
choke; 100 uh; coded BLU dot;
Modulator
same as L3
Antenna Pick-up Loop
2nd Doubler Plate; base stamped
AA7; includes 1V835422 CORE,
adjustable tuning; and clip;
coded BLUE dot
2nd Doubler Grid; base stamped
AA8; includes 1V835422 CORE,
adjustable tuning; and clip;
coded BLUE dot
NOT USED
244832402
244858093
24B835395
24K835396
same as L101
COIL, AF:
25D850636 choke; 6 henries
RESISTOR, fixed: composition;
+10%; 1/2 w; ins. unless otherwise
stated
6R5577 rR os
6R6031 100K
6R2028 2.2K £5%;
same as RI
same as RZ
6R6411 1K +5%
6R5631 120K
6R6411 1K +5%
6R6397 22K
6R5734 18K; lw
6R6048 47K
same as R102
6R6229 1K
same as R2
6R6432 270 ohm
REFERENCE MOTOROLA
SYMBOL PART No.
6R401017
6R6434
6R6341
6R2073
6R120638
6R5645
6R2068
6R6269
6R6080
6R2061
6R6475
6R5779
6R5766
18K812998
17K892469
17B821901
6R488043
6R6327
6R6326
24B835397
24K861145
9K87124
9B881243
DESCRIPTION
RESISTOR, (cont'd)
“same as R2
same as R105
1.8 meg +5%
27K
22K; 1 w
same as R105
2.2 meg +5%
330 ohm 45%
150 ohm +5%
same as R2
33K +5%
820 ohm
4.7K
180K 45%
680K
1,2 meg
same as R124
same as R2
12K; 2 w
same as R128
variable: 300K +20%; 1/4 w
wire wound; 4 ohm 42%; 1 w
wire wound; 4 ohm 42%; 3 w
NOT USED
same as R119
39 ohm; 2 w
1K; lw
same as R101
same as R102
100 ohm
same as R203
TRANSFORMER, RF:
“Ist Doubler; base stamped AA5;
includes:
1V87207 CORE, adjustable
tuning; and palnut
1V87208 CORE, adjustable
tuning; and clip
Reference parts C3, C4, C10,
Cll, Rl, R2, R3
Tripler; base stamped BF9;
includes:
1V87207 CORE, adjustable
tuning; and palnut
1V87208 CORE, adjustable
tuning; and clip
Reference parts C5, C6, C7,
R4, R5, R6
TUBE,
electron
electron
same as V101
electron
electron
electron
electron
electron
same as V101
SOCKET, tube: female;
7 contact; miniature; molded
mica filled phenolic base;
includes center shield; saddle
mounting
9 contact; miniature; molded
mica filled phenolic base;
includes center shield and
tube shield base; saddle
mounting
same as XV101
REFERENCE
SYMBOL
DESCRIPTION
SOCKET, (cont'd)
same as XV101
8 contact; brown bakelite wafer
base; saddle mounting
same as XV105
7 contact; miniature; molded
mica filled phenolic base;
includes center shield and
tube shield base; saddle
mounting
same as XV107
same as XV101
SOCKET, crystal: female;
4 contact; square molded black
bakelite base; chassis mounted
same as XY101
CRYSTAL
NOTE
When rdering a Transmitter Chassis
rystals must be ordered separately.
l type number and operating frequency
e specified when ordering crystal,
CRYSTAL UNIT, quartz:
assembly; includes 12 volt
heater element and thermostat
CE0Z2Z
»
AA
TA237W RECEIVER
MODEL
a Of Channel
TRDII7IAA/
60 ke
TRDII72AA/
REACT
TRDI170AC/ REACT R2-0 172 60 kc
TA2STW-R2WIELR Die AGy
moe
TRD1170AB/ moe it 30 ke
TA237S TRD1172AB/
een
TRD1170AD/ een R2=1L 30 ke
TA237S-R2 TRDILTZAD/
1. DESCRIPTION
TRD1170AA/
TA237W
a. Application
The receivers listed in the model chart are
designed to receive FM signals on one (or two)
MOTOROLA INC.
Engineering Publications
11/3/59-RCS
4501 W. Augusta Blvd.
RECEIVER
fixed, crystal-controlled frequencies inthe 144-
174mcband. The receivers obtain operating vol-
tages from the power supply which is part of the
overall radio set.
b. Design
The receiver incorporates a double-conver-
sion superheterodyne circuit. The chassis has
15 tubes and 18 tuned circuits, excluding the
plastic-sealed circuits of the 'permakay"' i-f fil-
ter. The i-f wave filter is the major factor in
determining the signal reception bandwidth. On
models designed for 30 kc channel spacing opera-
tion the signals are attenuated -100 db at +15 kc
On 60 kc. models the signals are attenuated -100
db “at +32" Kc;
c. Basic Receiver Circuitry
The basic receiver circuit consists of the
following stages: an rf amplifier, a first local
oscillator, a first mixer, a first i-f amplifier, a
second local oscillator, a second mixer,
second i-f amplifiers, two limiters, a discrimi-
nator and two stages of audio amplification.
three
d. Two-Frequency Models
Models which carry the -R2 suffix designa-
tion are two-frequency versions of the basic
Single-frequency receiver. The two-frequency
receiver is the same as the single-frequency re-
ceiver except for the addition of another first os-
cillator andcontrol crystal. Two-frequency mod-
els receive signals on two specific, crystal-con-
trolled frequencies in the band. Only one fre-
quency can be received ata time. The two-fre-
quency receivers are aesigned for operation witk
COMMUNICATIONS DIVISION
Chicago 5], Illinois
68P862485-O
GUARANTEED PERFORMANCE SPECIFICATIONS
MODEL NUMBER TRDI1I71AB/TA237S-L TRD1171AA/TA237W-L
TRD1172AB/TA237S-H TRD1172AA/TA237W-H
TRD1172AD/TA237S-R2-H TRD1172AC/TA237W-R2-H
MODULATION
ACCEPTANCE 25: ke #15 ke
TUNED CIRCUITS 30 including 12 plastic- 30 including 12 plastic-sealed
sealed in 'permakay"' filter in 'permakay"' filter
SENSITIVITY Less than 0.50 microvolt for 20 db quieting; 50 ohms rf input impedance
FREQUENCY STABILITY
AND TEMPERATURE
RANGE
SPURIOUS AND
IMAGE REJECTION More than 100 db |
TE rie compensated type, adjustable sensitivity, threshold sensitivity
of 0. 18 microvolt ;
6AK5 - RF amp. 6BH6 - Ist limiter
*6BC5 - oscillator 6BJ6 - 2nd limiter
6AB4 - lst mixer 6AL5 - discriminator
6BH6 - lst i-f amp. 6BH6 - noise amp.
12AT7 - 2nd osc. - mixer 6C4 - noise rectifier
6CB6 - 2nd i-f amp. (1) 6679/12AT7 - audio and squelch
6CB6 - 2nd i-f amp. (2) amp.
6CB6 - 2nd i-f amp. (3) 6AQ5 - audio output
Oven type crystal maintains oscillator stability within +0. 0005% from
-30°C. to +60°C. ambient (+25C. reference)
TUBE COMPLEMENT
AND FUNCTION
*two for 2-frequency models
AUDIO OUTPUT 2 watts to a 3 ohm speaker at less than, 10% distortion ' |
AUDIO RESPONSE From +1 db to -8 db of 6 db/octave de-emphasis characteristic from
300-3000 cps
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
a frequency separation between channels as great e. Chassis Complement
as 240 kc without any change in performance
specifications. An external switch is used to se- Each receiver consists of a basic chassis
lect frequencies. The switch is connected into and a number of other items depending upon the
the cathode circuits of the two first local oscilla- frequency range, number of operating frequencies
tor stages. In the F1 position the switch grounds and channel spacing operation. The receivers
the cathode of the #1 oscillator, permitting that are factory assembled from the sub-assemblies
stage to operate normally. At the same time it toformacompact singleunit. The items included
opens the cathode of the #2 oscillator to disable ineach receiver are summarized in the following
the #2 stage. In the F2 position the switch re- chart.
verses the connections and selects the #2 local
oscillator. The Fl-F2 switch is part of the con-
trol head in mobile radio sets.
MODEL NUMBER FREQ. BASIC CHASSIS | *COIL KIT FILTER|CRYSTA
s N N
X= 1 USED e 3 2 2
BRP Reet ees oe cad Sie ha
fi lee | ae mito ort © | = Silas
1 ! m1 5 ood Chet |r a Re @P nn MASI Be | em
a N
Satpal ie : a alsa bi
a EY SAD RE EES SES EE ERE SORENESS SERS
TRD1171AC/TA237W-R2-L
TRD1172AC /TA237W-R2-H
TRD1171AB/TA237S-L
TRD1172AB/TA237S-H
: SASS Arle
“oe
* Coil kit designations include an H or L to indicate frequency range:
TRD1171AD/TA237S-R2-L
TRD1172AD/TA237S-R2-H
H = 152-174 mc L= 144-152 mc
2. OPERATION
a. Stage Analysis
This receiver operates in accordance with
basic FM receiver operation theory. The stage
analysis given in these instructions is but a brief
summary of the salient points. To follow the
discussion refer to the block diagram. This dia-
gram shows stage-by-stage signal flow and oper-
ating frequencies.
b. RF Amplifier
The carrier signals received at the antenna
are coupled to the grid of the RF amplifier by the
impedance-matching network in the input circuit.
The rf stage provides some amplification of the
Signals, however, its main purpose in the cir-
cuit istoimprove sensitivity and selectivity. The
gain of this stage is designed to provide the opti-
mum signal-to-noise ratio in the signals sent to
the first mixer. In the output of this stage three
hi-Q, critically coupled tuned circuits provide
very high selectivity in the signals which pass on
to the mixer.
c. First Oscillator and Mixer
The first oscillator generates a signal which
is multiplied five times and heterodyned with the
incoming rf carrier inthe first mixer stage. The
difference between these two frequencies is used
as the mixer output. This output is a 12 mc sig-
nal which carries the modulation originally im-
pressed on the incoming rf carrier.
These frequency relationships can be ex-
pressed as follows:
= lZeme
multiplication first first
carrier factor oscillator mixer
input frequency output
(first if)
f - 12me
i, ‘sees ——________ ; where f_ is the carrier freq.
1 5 c
The multiplied oscillator frequency and the
rf carrier are used as the input to the first mix-
er. The output from the first mixer is called the
first intermediate frequency (first i-f).
d. First I-F and Second Mixer
The signals are amplified in the first i-f
amplifier and applied to the second mixer along
with an injection frequency generated in the sec-
ond local oscillator. The second local oscillator
frequency is controlled by the i-f crystal. This
frequency is 12455 kc, the same for all receivers
regardless of rf carrier frequency. The differ-
ence between the second local oscillator frequen-
cy and the first i-f is the second mixer output.
This output is a 455 kc signal which carries the
audio modulation. The frequency relationships
of these three stages are as follows:
Second local oscillator
freq. . 12455 ke
First intermediate freq. 12000 kc
Difference freq.
(second i-f) . 455 ke
e. Second I-F
A '"permakay'"' i-f filter is-used in the second
i-f before the amplification stages. This filter
is permanently sealed in polyesterstyrene is un-
conditionally guaranteed for the life of the re-
ceiver provided the seal is unbroken and the
housing is not tampered with. This filter is the
major factor in determining the bandwidth of the
receiver. It greatly attenuates the signal outside
the pre-determined pass-band. Signals leaving
the filter are amplified by three stages of second
i-f amplification (tubes V106, V107 and V108)
and applied to the limiter stages.
f. Limiters Discriminator and Audio Stages
Thetwo limiter stages, tubes V109 and V110,
clip the tops andbottoms of the incoming signals,
thereby virtually eliminating the noise which
characteristically "rides" the signals in the form
of amplitude modulation. These stages are lar-
gely responsible for the ''quieting"' effect inherent
in the FM communications receiver when it picks
up an on-frequency signal. The limiter output is
sent to the discriminator, tube Vl1l1l, which
translates frequency deviations into corresponding
amplitude variations, thereby detecting the audio
modulation. The audio amplification stage pro-
vides two watts audio output to a three ohm load.
63C854791-A
J104 (0) :
144-174 MC
ANTENNA RF
V104 fc
V4iO3
COILS
2ND IF-{
V 106
6CB6
DELAY
VOLTAGE
NOISE NOISE
LEGEND:
fe =CARRIER FREQUENCY = 144-474 MC.
f—f
(
fy, 71ST. OSCILLATOR FREQUENCY = 5
=26.4 -32.4MC.
t, = 4ST. INTERMEDIATE FREQUENCY: fc-5 fo, = 12 MC.
f= 2ND.INTERMEDIATE FREQUENCY = fo, ~f, = 455 KC.
fo, =2ND. OSCILLATOR FREQUENCY= {2.455 MC.
g.- Noise-Actuated Squelch Circuit
The noise-actuated squelch circuit consists
of a noise amplifier, a noise rectifier, a dc am-
plifier and associated circuit components, as
shown on the schematic diagram. The discrimi-
nator output is applied to the input of the noise
amplifier, V112. The input r-c network greatly
attenuates the low-frequency components but
passes frequencies above 3000 cps. These ran-
dom frequencies are applied as a signal to the
grid of V11l2 and amplified like other types of
signal inputs. In the cathode of the noise ampli-
fier the variable SQUELCH control varies the
gain of the tube by adjusting its bias. The setting
of this control is covered in the following para-
graph.
The output of the noise amplifier drives the
noise rectifier, V113. The rectified noise signal
{ST MIXER
MULTIPLIER
L6 & L7
SQUELCH
AMPLIFIER RECTIFIER AMPLIFIER
vail2 V3 VGA
6BH6 6C4 1/2 6679/
i2ATT
parr FREQ. NO.{ TFREQ.NO.2 | bs r
|__| OsciLLaTor | SNe Sap pa ore CRYSTAL
¥ 104 SBMULTIPLIER ———{ Y201 | Widae y 402
{ eee cas ‘ees | 1/2 6679/ foz
(fe ee Mee sta 15 tet {2AT7
NOTE: V201 & Y201 USED ON TWO
FREQUENCY MODELS ONLY.
DC BIAS
2ND MIXER
V4O5A
{/2 6679/
{2AT7
fo fo
{ST LIMITER 2ND LIMITER DISCRIMINATOR
V1iO9 Vito Viti
6BH6 6BU6 6AL5
NOISE & AUDIO
AUDIC
AUDIO
AMPLIFIER
V444B
4/2 6679/
{2AT7
POWER
AuDIO | AMPLIFIER AUDIO
OUTPUT
V5
6AQ5
appears as poSitive voltage across the load re-
sistor, R152. This positive voltage is added to
a steady negative bias taken from the second
limiter stage. The resultant of these two volt-
ages is applied to the grid of the dc amplifier
tube. In the no-signal condition, i.e., noise
alone, the resultant voltage is zero or somewhat
positive. The dc amplifier conducts and cuts off
the audio amplifier tube. This keeps the speaker
silent when signals are not being received. When
signals are received the noise is greatly reduced
and the rectified noise output is not
overcome the steady negative bias on the grid of
the dc amplifier. In this condition, the dc ampli-
fier is cut off and the audio amplifier operates,
passing on the received audio signals.
enough to
h. Squelch Control
The SQUELCH control limits the gain of the
noise amplifier tube. In practice, this control is
adjusted for a "threshold" setting. This is the
point where the rectified noise voltage will bias
the grid of the dc amplifier so that the audio am-
plifier is just barely cut-off. Then, when a weak
signal is received a slight reduction in noise will
cut off the dcamplifier and allowthe audio ampli-
fier to conduct.
Setting of the SQUELCH control is described
in the instruction manual INSTALLATION AND
OPERATION section.
abe Audio Level
The audio level control onthe receiver chas-
sis isused to set the maximum audio level avail-
able at the VOLUME control on the control unit.
This permits future adjustments to compensate
for variations in tube characteristics, resistor
and capacitor tolerances and transmitter devia-
tion. This control has more than adequate range
of audio drive to the 3 ohm PM speaker.
Setting of the audio level control is described
in the instruction manual INSTALLATION AND
OPERATION section.
3. ALIGNMENT PROCEDURE
A complete receiver alignment procedure, in
chart form, isincluded in this section. Test set-
up information, using a MOTOROLA portable test
set, isalso included with the alignment procedure.
Any 0-50 microampere meter with anequiv-
alent series resistance of 20,000 ohms may be
used as a metering device. The meter should be
connected from chassis ground to the pin recep-
tacle of the metering socket corresponding to the
stage being measured. Refer to the applicable
schematic diagram for specific metering pin re-
ceptacle information.
4. PRE-OPERATIONAL NOTES
The receiver isaligned toits exact operating
frequency before it is shipped from the factory.
It should, however, be checked for proper oper-
ation before it is placed in service. Make the
frequency check described in step 9 of the align-
ment chart in this section. Also take meter
readings for the first five entries in the stage
measurement chart. If the readings are beyond
the allowable limits, realign the receiver ac-
cording to the alignment chart.
a. Sensitivity Adjustment (20 db Quieting)
The receiver sensitivity check should be made
in a well shielded location in the absence of ex-
traneous electrical noise. The sensitivity, or
quieting signal, is that input signal necessary to
reduce the output noise at the speaker by 20 db.
The following equipment is required to ac-
curately measure the quieting signal:
Signal Generator (Motorola Model TU576, or
Measurements Corp. Model 80, or equivalent)
Motorola Portable Test Set (Model TU546
Series)
(1) Warm up the signal generator for 1-1/2
to 2 hours.
(2) Plug the test set metering cable into the
test set and the other endinto the 1l-pin receiver
metering socket on the radio set.
(3) Place the test set function selector
switch in the RCVR position. Place the position
selector in position 11, AUDIO.
(4) Set the signal generator to the carrier
frequency andconnect the signal generator, using
the coaxial cable and 6 db pad, to the antenna
connector on the radio set. The exact carrier
frequency will be indicated by a ''0'' reading on
the ''0'' center scale of the test set with the posi-
tion selector switch in position 4. Return the
switch to position 11, AUDIO.
(5) Turn the SQUELCH control on the con-
trol head fully counterclockwise (open).
(6) Set the VOLUME control to provide any
convenient reading on the 0-2 vac scale on the
test set, preferably mid-scale for ease in read-
ing.
(7) If the radio set has a speaker connected
to it and in operation, place the test set SPKR
switchtothe OPEN position. If the radio set under
test doesnot havea speaker connectedtoit, place
the test set SPKR switch to the LOAD position. It
is important that only one speaker be in the cir-
cuit, i.e., either the speaker on the radio set or
the speaker on the test set. Now note the exact
meter reading and mark it down for use asa ref-
erence later.
(8) Place thetest set multiplier switch tothe
0.2 vac position and hold it there. This makes
the meter exactly 10 times, or 20 db, more sen-
sitive than the normal 2 v ac position.
(9) Increase the signal untilthe meter needle
isinexactlythe same position as noted in step (7).
The noise has been reduced 20 db. The receiver
sensitivity in microvolts can now be read on the
signal generator.
Equipment required:
Ac vtvm
Signal Generator (Motorola Model TU576, or
Measurements Corp. Model 80, or equivalent)
(1) Connect the vtvm across the voice coil
terminals (terminal #1 and #2 on the power supply
receiver terminal board).
(2) With noise only, turn the VOLUME con-
trol to a normal listening level and turn the
SQUELCH control fully counterclockwise (open).
(3) Note the reading on the meter.
a reference level to be used later.
This is
(4) Set the signal generator to the carrier
frequency andconnect the signal generator, using
the coaxial cable and 6 db pad, to the antenna
connector on the radio set.
(5) Inject a signal until the noise is reduced
1/10 the value as noted in step (3). For example,
if step (3) was 1.0 volt, then step (5) should be
0. lvolt. The noise has been reduced 20 db. The
receiver sensitivity in microvolts cannow be read
on the signal generator.
c. Average Stage Measurements .
INPUT TO FREQ. IN MC,
METER
POSITION
METER READING
OR DB.
APPROX, MICROVOLT
INPUT
150,000 Pinot Vi107
2nd IF -2
' 1
nn Nn
2000 Pin 1 of V106
2nd IF-1
Pin 1 of V104
3
*DB Meter
*DB Meter
“DB Meter
sd
1 -5
3
ee
aE SE ee
: a
Pin 6 of V103
a0 lst Mixer
he
0
1
1
1
l
1
*
PREC OE s
4
4
4
+9
0
Cc
Cc
Cc
iz
en
F
F
F
55
55
es)
i 1
2
i 4
NOTE
A Model T1034A Signal Generator was used when taking readings on V101, V103, and V104.
A Model 65B Signal Generator with a 30 ohm terminated output cable was used when taking
all other readings.
* Refer to paragraph 4 when making this measurement.
** A meter reading of up to +1 ua of zero is allowable without any degradation.
AEPD-1707-A (CE057)
AEPD- 1406
oil (see DETAIL A, lower left).
ji and set the ON-OFF switch to
the probe in its position and place
|/meter reading (selector switch
to that an increase of Signal
a to keep the input at a constant
r 5 ua with the selector switch in
lice the test set ON-OFF switch
‘the illustration. After adjusting
; The signal
Adjust L13 fora
age, The peak found when the
and L1l for a maximum meter
|
|
i)
}
1 (pin 6) of V103 and adjust L10,
/the screwdriver adjustment slot
lor switch in position 6. If
ile adjusting trimmer C204 and
ntended to receive. A zero
Check the final setting by
|s the trimmer is rotated. Set
f
|
ved. To do this follow the pro-
ito pin 6 of V103 instead of pin 7,
(position 1 or 2).
tignal loosely to the grid (pin 1)
Ise a 6 db, 50 ohm, attenuation
)
in while making the adjustments.
émitter, signal generator or
db). Turn VOLUME control on
tr. Set the selector switch to
reduce the meter reading more
TU546
TeST SET
ALIGNMENT SWITCH METER
FREQUENCY | ADJUSTMENT | POSITION] READING
5
ee 4 Zero
top slug
Maximum
455 kc,
sharp tuning
Tel
bottom slug
Maximum
455 kc,
sharp tuning
455 ke,
sharp tuning
455 kc,
broad tuning
455.ke;
sharp tuning
Ik oye 7
iZ-mc,
sharp tuning
WA eax, Maximum
sharp tuning
L10, L9 lor2
and L8
L5 Maximum
(L201)
ad
L7 lor2 Maximum
L6
L4, L3 ore, Maximum
and L2
r
:
Receiver
crystal
frequency,
sharp tuning
Carrier
frequency,
sharp tuning
Carrier
frequency,
sharp tuning
Carrier freq.
sharp tuning
Carrier freq.
sharp tuning
Reduce
audible
noise
Carrier freq.
slight adj.
rr rr
144-174 MC 'T-Power'! Mobile
Receiver Alignment Procedure
Motorola No. EPD-907-B
11/3/59-RCS
AEPD-1707-A (CE057)
AEPD- 1406
HOW TO SET UP THE P-8500 AND P-8501 SERIES TEST SETS
FOR DISCRIMINATOR AND 455 KC ALIGNMENT
- Set the REC.-XMTR. 0-50 UA switch to the REC position,
2. Plug a 455 kc crystal into the two-pin crystal socket.
3. Set the GRID CURRENT-METER-FIELD STRENGTH selector
switch to the GRID CURRENT position.
4. Set the ATTENUATOR control for maximum output (10).
5. Place the test set ON-OFF switch in the ON position. (Test
set operates on internal battery. Conserve battery life by
keeping switch OFF when set is not in use.)
6. Adjust the frequency control (ADJ) for a maximum meter
reading.
7. Set the ON-OFF switch to the OFF position.
8. Set the GRID CURRENT-METER-FIELD STRENGTH switch
to the METER position.
9. Plug the test set metering cable into the METER receptacle
on the receiver chassis,
10. Connect one end of the test set extension cable to the RF
OUTPUT jack on the test set. Connect the other end of the
extension cable to the RF probe cable.
HOW TO SET UP THE TU546 SERIES TEST SETS
FOR DISCRIMINATOR AND 455 KC ALIGNMENT
1, Set the function selector switch to the RCVR position.
Z. Connect the 20-pin metering cable into the receptacle on
the test set. Plug the other end (1l-pin) into the metering
socket on the receiver.
3. Connect one end of the test set rf extension cable to the
rf connector on the test set. Connect the other end of
the extension cable to the rf probe cable.
4. Place the oscillator and meter reversing switch to the
455 kc position.
TEST SET SELECTOR SWITCH POSITIONS
P-8500 & P-8501
SERIES
TEST SETS
TU546 SERIES
TEST SETS
Wil
TERMINAL IDENTIFICATION
DETAIL A
SOLDER SHORT JUMPER
ESTERS 1)
TUNING SLUG
COLOR CODE
BLU.
ee ae
CIRCUIT 2nd I-F lst Lim. Discr. Discr. lst Osc.
METERED #3 Grid Grid Output Input Grid
DISCRIMINATOR
STEP 1&2
TA
2ND IF-2
STEP 4
Li5
2ND IF 2ND IF-4
STEP 5 STEP 3
Li4 Lie
STEP 6
{2MCIF-6 L43 STEP 7
ele ae I. Lio 12Mc IF-1
{2MCIF-5 L42 L9 4{2MC IF-2
STEP 44 L8 {2MC IF-3
RF:MIXER GRID L4
; STEP 40
Ra NC at L6 4ST MULTIPLIERIIF
RF: PLATE we L7 INJECTION ‘IF
STEP 8
STEP 42 L5 1ST OSCILLATOR:RF
Paani L204 2ND OSCILLATOR:RF
2.
3h
ANTENNA COIL STEP 9
C110 FREQUENCY
C204 CHECK
AEPD—1707-A
HOW TO SET UP THE SIGNAL GENERATOR*
FOR 12 MC, ILF. ALIGNMENT
Couple the signal generator output loosely to the grid (pin 7) of V105.
Couple just enough input to give a small meter reading.
Set the test set selector switch to position 4. Turn on the test set.
Set the signal generator frequency for approximately 12 mc.
Locate the exact 12 mc point by rotating the generator dial back and
forth around the 12 mc setting until you obtain a meter reading of
exactly zero (position 4), The meter reading should go above and be-
low zero as the dial is rotated. Leave the generator set for zero meter
reading. Make sure the signal remains constant throughout the align-
ment (generator may drift).
*Use a Motorola T1034A Series, or equivalent.
DISCRIMINATOR
STEP 1&2
Ti
2ND IF-2
STEP 4
Li5
2ND IF 2ND IF-4
STEP 5 STEP 3
Li4 Li6
STEP 6
[F-6 Lis STEP 7
2 lier LiO 12MC IF-1
[F-5 Liz L9 {2MC IF-2
STEP 44 L8 {2MC IF-3
GRID L4
ING L3 STEP 40.
L6 4ST MULTIPLIER‘IF
L2 L7 INJECTION ‘IF
STEP 8
STEP {2 L5 1ST OSCILLATOR: RF
L4 L204 2ND OSCILLATOR:RF
ENNA COIL STEP 9
C10. FREQUENCY
C204 CHECK
AEPD—1707-A
HOW TO SET UP THE SIGNAL GENERATOR*
FOR 12 MC, I.F. ALIGNMENT ,
the signal generator output loosely to the grid (pin 7) of V105.
just enough input to give a small meter reading.
test set selector switch to position 4. Turn on the test set.
signal generator frequency for approximately 12 mc.
the exact 12 mc point by rotating the generator dial back and
ound the 12 mc setting until you obtain a meter reading of
zero (position 4). The meter reading should go above and be-
> as the dial is rotated. Leave the generator set for zero meter
Make sure the signal remains constant throughout the align-
enerator may drift).
Aotorola T1034A Series, or equivalent.
TU546
TEST SET
SWITCH METER
POSITION | READING
ALIGNMENT
STEP STAGE, TEST CONDITIONS AND PROCEDURE FREQUENCY | ADJUSTMENT
a aS ee
1 DISCRIMINATOR PRIMARY -- Solder a short jumper across terminals 4 and 5 of the discriminator secondary coil (see DETAIL A, lower left). 455 kc, yi | 5
Set up the Motorola Test Set as described in the left hand column. Place the test set selector switch in position 1 and set the ON-OFF switch to sharp tuning bottom slug
the ON position. Move the rf probe around near pin 1, V106, until the meter reading is at least 15 ua. Secure the probe in its position and place
the selector switch in position 5. Adjust Tl for maximum meter reading. Unsolder the jumper.
‘DISCRIMINATOR SECONDARY -- With the rf probe placed as in step 1 adjust the top slug of Tl for exactly zero meter reading (selector switch 455 ke,
in position 4). sharp tuning top slug
Zero
Maximum
Maximum
455 KC, I.F. COIL Ll6 -- Place the rf probe near the input to the 455 kc I-F filter. Couple the signal loosely so that an increase of signal 455 kc, L16
strength will produce a linear increase in meter reading (switch in position 1 or 2). Secure the probe in position to keep the input at a constant sharp tuning
level. Adjust L16 for a maximum meter reading with the switch in position 2.
lp
455 KC, I-F COIL L15 -- Couple the signal to the I-F filter so as to obtain a maximum reading of approximately 5 ua with the selector switch in 455 kc, L15 Maximum
position 1. Adjust L15 for a maximum reading. broad tuning
455 KC, I-F COIL Ll4 -- Use the same conditions as in step 4. Adjust L14 for a maximum meter reading. Place the test set ON-OFF switch 455 kc, L14
in the OFF position and remove the rf probe. sharp tuning
Maximum
;
a
Maximum
lor2 Maximum
Parcs Maximum
um
lor 2 Maxi
L14 2 Reduce
audible
noise
144-174 MC ''T-Power" Mobile
Receiver Alignment Procedure
Motorola No. EPD-907-B
11/3/59-RCS
12 MC. I-F COILS L13, L12 and Lll -- Set up the Motorola T1034A Series (or equivalent) as described below the illustration. After adjusting
the signal generator set the test set selector switch to position 1 or 2 and couple the generator output to the grid (pin 1) of V104. The signal
must be coupled loosely so that an increase of signal strength produces a linear increase in meter reading (position 1 or 2). Adjust L13 fora
maximum meter reading with switch in position 1 or 2, note that two peaks are present within the coil tuning range. The peak found when the
slug is nearest the top of the coil (as viewed from bottom of chassis) is the proper alignment peak. Adjust L12 and L1l for a maximum meter
reading (position 1 or 2).
IZ mec;
sharp tuning
12 MC. I-F COILS L10, L9 and L8 --Follow the same procedure as in step 6 except couple the signal to the grid (pin 6) of V103 and adjust L10,
L9 and L8; no double peaks will be found.
L10, L9
and L8
12 mc,
sharp tuning
FIRST OSCILLATOR COIL L5 -- Uncouple the signal generator. Position the ceramic trimmer, C110, so that the screwdriver adjustment slot Receiver
is parallel with the length of the receiver chassis. Adjust coil L5 for a maximum meter reading with the selector switch in position 6. If crystal (L201)
2-frequency, set Fl-F2 switch on control head to F1 position while adjusting L5. Then repeat in F2 position while adjusting trimmer C204 and frequency, ‘
coil L201. sharp tuning
FREQUENCY CHECK -- Transmit the carrier frequency from the transmitter which this receiver is normally intended to receive. A zero Carrier C110, C204
meter reading indicates that the receiver is on frequency. Adjust trimmer C110 to obtain a zero meter reading. Check the final setting by
rotating C110 back and forth while observing the meter. The reading should go above and below the zero point as the trimmer is rotated. Set
C110 for exactly zero meter reading. On 2-frequency receivers, adjust C204 for the number 2 frequency.
frequency,
sharp tuning
~
a cS
MULTIPLIER COILS L7 AND L6 -- The signal generator must be set for the exact carrier frequency to be received. To do this follow the pro-
cedure outlined below the illustration except select the carrier frequency instead of 12 mc and couple the signal to pin 6 of V103 instead of pin 7,
V105. With the generator output coupled loosely to pin 6, V103, adjust L7 and L6 for maximum meter reading (position 1 or 2).
Carrier
frequency,
sharp tuning
RF COILS L4, L3 and L2 -- Keep the signal generator set for the carrier frequency as in step 10. Couple the signal loosely to the grid (pin 1)
of V101. Adjust L4, L3 and L2 for maximum reading (position 1 or 2).
L4, L3
and L2
Carrier freq.,
sharp tuning
—
N
ANTENNA COIL LI! -- Connect the signal generator output to the antenna receptacle on the receiver chassis. Use a 6 db, 50 ohm, attenuation
pad between the generator and the receiver input. Adjust Ll for maximum reading.
Carrier freq.,
sharp tuning
— ao ~I oO
Is.
=
bo
IGNITION NOISE ADJUSTMENT -- Install the receiver in the vehicle. Start the vehicle engine and allow it to run while making the adjustments.
Turn the receiver ON and allow it to warm up for five minutes. Radiate a carrier frequency signal from a transmitter, signal generator or
test set (see test set instruction manual). The signal should be just strong enough to produce quieting (20 to 30 db). Turn VOLUME control on
control head to normal usable level. Plug the test set metering cable into the METER receptacle on the receiver. Set the selector switch to
position 2 and note the meter reading. Adjust coil L14 very slightly to reduce audible ignition noise. DO NOT reduce the meter reading more
than one-half microampere.
Carrier freq.,
slight adj.
= al aq” oe PO Ae “a ee ot” ee ee a oe 7
iL. ae ae ee a Pera
ST a ee eee
=
Rapahe ol
a a) ee,
Yto1
CRYSTAL HEATER
——08 02
“ C166
Vi05 1500 |
4 5
“FR Cir
vit4 = O1UF
DISCRI sf ls
vio2
3 —
c169
O1vF
W103
3
REVISIONS
vi06
3{ la aan emma Ce
TRDI1I71AA/
TA237W-L-4
TRD1172AA/
TA237W-H-4
TRD1171AB/
TA237S-L-5
TRD1172AB/
TA237S-H-5
TRDI171AA/
TA237W-L-5
TRD1172AA/
TA237W-H-5
TRD1171AB/
TA237S-L-6
TRD1172AB/
TA237S-H-6
CRYSTAL & HEATER
33K RESISTOR
ADDED
6.8K RESISTOR
ADDED
C129 WAS .47 uuf AND
RELOCATED
CIRCUIT WAS AS
SHOWN BELOW
63E854792-F
AEPD-909-B (CE023)
AEPD-909-8
clei
iam peace oe is eae
|
ola
We hreeg late ed
ee ets eae §
S
OAO a
ao
viiz os RiWi5 C125
ms 190K ab 1500
foe]
3 4 fq =>
~
(NOTE 3) Y 80
GRN.~YEL
| y
TERMINAL IDENTIFICATION BOTTOM VIEW
OF GOILS Vi0O5-B
2ND. OSC.
1/2 6679/12AT?
COLOR CODE
BLU.
MODEL TABLE
& FREQ. HANNEL
pone rreauency SRP | dance _Epacing
oO MODEL TA237X MODEL
REMOVED TABLE
razsrw freonias tazswel 3 hae- teen one |
|TROW72AA/TAZ37W-H_ || 5 fi52-174MC[_6OKC
n237g LUROUTIAB/ TA237S-L_ | 6144-152 SOKC
[TROU72AB/TAZS7S-H_ || 6 ft52-174MCT30KC _ |
4ST C
TO SQUELCH CONTROL
Single Frequency Receiver
Schematic Diagram and Parts Location Detail
Motorola No. 63E862486-O
11/3/59-RCS
ViOS-A
FRFQUENCY RANGES V104 V103 Ae
ate ne He anes Re {ST MIXER | . 12MC alba AMP : exe a
MOUNTING PLATE
“5 644840844
oa 129
C144 . (G——Vo.ume contro (ae
HI04)5 3
a7) Ye)
=
>
x
>
3
Ni
>
a
|
| uw
lg
FE
ait
| L9(109)
— i
ANT, | | |
| |
cs c2t ;
st Fp
10(L) |
ei pam
V4 { { } c102 c103 | R103 | RA wi =
DISCRIMINATOR PRIMARY Ti | | sD SO oa
| 261
S V445 | (er | te
s V440 viq2 |
i
vio vi eo, . |=
yi ee 2 ss : i ? | — 14 455KC IF COIL were 8 e ue | :
oS be; 3 68C5 fails C115 (3 =i Linoy : 0.82 1500 |
° TUBE SHIELD aA Paaccasan fie 2) tt ! ———=
j : | te ce | |
: 26A890034 S Ne get | : 7
v408 v106 inane on or
= V107 IF CRYSTAL (Y102) PF uf Lp 23>, {—
a TUBE SHIELD CRYSTAL cut ft cee I * T Be 3
3 260881244 HOLD-DOWN GLAMP | in|
; 4 199V B+ RED 7 - = 7 Lt IDISCR.
2 455KC : | | =
+ FILTER V105 SRN.-YEL.
aq L43 12 MC IF-6 rie * FROM FILTER ) V107 ? VOB 7 Ute (ara) 3
42MC is 4 re) B { { 42 MC IF-4 100 Bs 2 ‘Lt4 Bc6) 455KC LF. AMPL-2 L15.8C6 ) Rizr : 455KC LF. AMPL:3 -— ees ; Al =
Vi0O4 ie Li2 I2 MC IF-5 Ed val ms : rea move 5) : a 200
{2 MC IF-2 L9 re a 7 : 2 5 7v Si0 3 ace "3 S | R130 | R29 : | BK 1 z
68K aol 5% 1 WoO $k | a Th R : 2 < ake :
—— L4 RF COl L Re : T T Ton 33K es ISR eH SoS AE WHT.- BRN —* | ; % t a WHT al Tisoo | T on a 02 | | | ot) tee ey 1
{2MC IF-4 L8& —4 ViO3 * = en = = | ci. MieTErRSoceeniie® ; Fa = a ae Ae | ae = MEDS BA, ae = = = | oki 5 ig ee We a Aa ‘ | eK 900-1
| ¥ ES RF Col L NOISE FROM DISCR | [ T sew E i. ol 4
MULTIPLIER COIL L6 L7 MULTIPLIER COIL re bog | ae aa ;
TU BE S Hi E~ D L e R F CO L , BOTTOM VIEW ne sa nes re : 4 Panne S * | bid eee rower su ~ ee : fi
26 A890034 V204(2-FREQ.ONLY) ee ee
vi02 ViO4 SOT 2 ; a "6 So
4ST OSCILLATOR COIL L5 MOUNTING POST ~ ra) keene ne
46K848989 ate Cea Sore
CONTROL CRYSTALS =| 2S 6) \L1 RFZANTENNA
(Y101) TY 301(2-F) CRYSTAL
(Y¥201) HOLD-DOWN CLAMP aii |
(226) 414850841 | |
FROM Vit
———— oe .
& 2ND LIM
ot y 5+ 200
B+
vi04 VIO5-A
42MC {ST I. F. AMP. 2ND. MIXER
: 6BHE 4/2 6679/12AT7
NOTES:
C128
{ ALL RESISTOR VALUES ARE INDICATED IN OHMS t10%, 1/2 WATT
UNLESS OTHERWISE STATED. K= {000 OHMS
455KC
FILTER 2 ALL CAPACITOR VALUES ARE INDICATED IN MICROMICROFARADS yiot
(NOTE 5 ) UNLESS OTHERWISE STATED CRYSTAL HEATER
A ,
3. “Y" HEATER IS 12.6 VOLTS “08 0—- cee
Vi05 : 1500
ees oe
4. ALL VOLTAGES MEASURED WITH A VTVM (B+=200V) AND WITH ame | C170
THE SQUELCH CONTROL AT MINIMUM (COUNTERCLOCKWISE) AND A Lowr
VOLUME CONTROL AT MAXIMUM (CLOCKWISE). yn
sf 14
5. COMPONENTS NOTED DIFFER IN VALUE FOR THE VARIOUS RECEIVER ’
MOCELS FOR WHICH THIS DIAGRAM IS APPLICABLE. vio2
REFER TO THE. FOLLOWING TABLE FOR SPECIFIC IDENTIFICATION vo
of ee
cea
sie
O1 UF
vio3
. 4f 3
To, viog REVISIONS
et CHASSIS REF.
: ISSUE SUFFIX SYMBOL CHANGE LOCATION |
+
C125 TRDII71IAA
maisee \ | TA237W-L-4
oat BN TRD1172AA
__ CRYSTAL _&_HEATER = TA237W-H-4 33K RESISTOR
MODE | = TRDI1171AB - ADDED
T {5-1-5
COMPONENT |p uTIAA/TARSTW-L TRONTIAB/TAZ37S-L t | B Ea es 2
Vi05-B |_TRON7ZAA/TAZ37W-H__| TRDI172AB/TA237S-H | | .° EDIE AB
2ND. OSC. | TA237S-H-5 : =
1/2 6679/t2ar7 et ee a a7 || TRDIITIAA, R66 [6.6K RESISTOR
crs ae eed Ree ee waota TA237W-L-5 ADDED
‘< a a a ee | TRD1172AA/ [R115 |WAS180K —_———s
ete iL ea ae ee B 7TW-H-5 [R116 |WASI10MEG |
fey 4 TA237W-H 5 R116 cas 101 AEG 2ND OSC
TYPE GO3 aT Rin man ee eee ee TRD1171AB/ WAS .47 uuf AND
a 8.2MEG. ts TA237S-L-6 RELOCATED
= I = van TRD1172AB/ CIRCUIT WAS AS
DISCR. TA237S-H-6 SHOWN BELOW
6ALS 8
“E101 oB80 =
R140 f= mal Rie TO PIN 4 OaO Ee
(METER &
4 =| 5 | | 1.5 MEG SOCKET) =
3 | | | R144 Sa20k iced :
5 | 100 47K | 5% ae a
° ==
= z 3 a
viog C149 7OV VAT . = o28 | | od
4ST. LIM 5 2NO°. LIM. S S 200 100 e => (NOTE 3) Y
aH6 ch 7 6BU6 c26 3 } } pace IL =f BLU WeTER GRN-YEL
= 240 = = 10 c29
‘ 6 i, : : | Ge 4 7 =e R142 152 SOCKE) us
=17V 7 liens 200K) 1) 1000 TERMINAL IDENTIFICATION BOTTOM VIEW
We { BLK RED Bie OF COILS Vi05-B
R134 RI35 R136 2 530 | = B+ 200V. 2
100K z 2% 1 BLU \ e 2N0. OSC.
ES eG 5% Toru MES. FROMIOSON@ =e (/2 6679/2aT?
= + [OF y
‘ C148 C164 if (NSE 5) a2 FROM DISCR WHT =GRN. | 5 \
WHT -RED—> ot 02 3! =
| [i500 i: 500} FROM MSTA tea COLOR CODE
LN aad a = FROM: 2NoD 1)F. 4 ee BRN
= = FROM DISCR. OUTPUT Sarai =
06 - TO Vii2 7 BLK.
NOISE AMPL. GRID Jags { "a MODEL TABLE
OUTPUT 9 | series | | _oNe-FREQUENcY | FREQUENCY BES Ee |
J TIAA /TAZ37W-L_|| 60 KC MODEL TA237X
: AUDIO FROM DISCR TO vite JE . [TROUTIAA/ TAZ37W-L_ || 5 |4g@t52MC_6OKC_ |
° vat3 Vii4-A a Seige sealer VA45 Ms hoist ame WHT-GRN.§ TO PINS * SRN =e kee TRONTOAA/TA237W FrepiT2Aa/TAZSTW-H | 8 fs@1T4mc] GOKC_] REMOVED
5 NOISE RECT Dc AMPL 42 - * Vi44-B POWER AMPL. i (METER SOCKET) TROUTOAB/sAz375 [LROM7IAB/ Tazs7s-L [6 hraa-ts2mc | S0KC
ee 1/2 6679 /128T7 {ST AUDIO 6AQs TO vita 8 [TRON72AB/TA237S-H_ | 6 [ts2-174MCT 30KC |
YEL -PED Rte aly cies 190V BLU. T1O1 Yer _—Y#029 x {ST AUD 2
= AUDIO CUTE UT
TO SFEAKER POWER SUPPLY
3,2-OHMS TERMINAL ae
BLK
102-10 som
BLK -WHT |
A<—t—_ om)
O ee, = a=, TO SQUELCH CONTROL
, — MOBILE
FI ny 8 ag CONE YELSS SANIYEL ay) —> =YEL. cr *Y" FIL
8+ 200V, <<———__— ee 200v.
x =
RS ae
~ = red.
+ 200V
Single Frequency Receiver
Schematic Diagram and Parts Location Detail
Motorola No. 63E862486-O
11/3/59-RCS
y201
CRYSTAL HEATER
°o B
Yiot
CRYSTAL HEATER
=
4 5 ry
aati
7 C170
VIG => .O1UF |
5 4.
AEPD-909-B
vios
vii2
E
AST
(NOTE 3)
v4
Y.
CRYSTAL & HEATER
‘1
eo
GRN.-YEL.
TERMINAL IDENTIFICATION
COLOR CODE
BLU
MODEL TABLE
TWO-FREQUENCY
TRON71AC/ TA237 W-R2-L
TRDI172AC/ TA237W-R2-
HASSIS
SUFFIX
FREQ,
RANGE
144-152MC
TROWM71AD / TAZ37S-R2-
TRD1172AD/TA237S-R2-
EeGral
—
6
152-174 MC
144-152MC
152-174MC
BOTTOM VIEW
OF COILS
CHANNEL
SPACING
REVISIONS
CHASSIS REF.
TRD1L171AC/
fy TA237W-R2-L-4
” TRD1172AC/
m | TA237W-R2-H-4 33K RESISTOR
in TRD1171AD/ ADDED
fm | TA237S-R2-L-5
2 TRD1172AD/
TA237S-R2-H-5
R166 6.8K RESISTOR
ADDED
TRD1170AC/ R115 WAS 180K
TA237W-R2-5 R116 WAS 10 MEG 2ND OSC
TRD1170AD/ C129 WAS .47 uuf AND é
TA237S-R2-6 RELOCATED.
CIRCUIT WAS AS
SHOWN BELOW
R15 C125
180K la'foe
63E854793-F
Vi05-B
2ND. OSC.
1/2 6679 I2AT7
102
12.455Mc =
TYPE GO3
MODEL TA237X
REMOVED
Two-Frequency Receiver
Schematic Diagram and Parts Location Detail
Motorola No. 63E862487-O
11/3/59-RCS
SCHEMATIC DIAGRAM PARTS LIST
21R490602
21R400072
21R114052
21R87127
21R121918
21K836528
21R490605
21K840716
21K840711
21K836528
21R791561
21R31492
21R119296
21R114153
21R474573
21R475262
21R475261
21R890124
21K840048
21K840811
21K840812
21B801139
21B800801
21K840365
21B837745
21K881064
205840719
21K838284
Reference:
Schematic Diagram
63E862486-O
CAPACITOR, fixed: unless other-
wise stated
ceramic; tubular; 10 uuf 25%;
500 vdcw
ceramic; tubular; 6 uuf +,5 uuf;
500 vicw
ceramic; tubular; 56 uuf £10%;
500 vdcw
ceramic; tubular; 36 uuf 45%;
500 vdcw
same as C1L
ceramic; tubular; 6 uuf +.5 uuf;
500 vdcw
ceramic; disc; 14 uuf +5%;
500 vdcw
ceramic; tubular; 12 uuf +5%;
500 vdcw
same as CIL
same as C1lH
ceramic; disc; 24 uuf +5%;
500 vdcw
molded silver mica; 51 uuf +5%;
500 vdcw
ceramic; disc; 14 uuf +5%;
500 vdcw
fixed: ceramic; tubular; 6 uuf
#.5 uuf; 500 vdcw
ceramic; tubular; 20 uuf £5%;
500 vdcw
ceramic; tubular; 16 uuf #5%;
500 vdcw
same as C2L
ceramic; tubular; 47 uuf 10%;
500 vdcw
ceramic; tubular; 50 uuf 5%;
500 vdcw
ceramic; tubular; 15 uuf #5%;
500 vdcw
ceramic; tubular; 12 uuf +5%;
500 vdcw
same as C13
same as C12
ceramic; tubular; 10 uuf +5%;
500 vacw
same as C2H
same as C2H
same as C2H
molded silver mica; 240 uuf 5%;
500 vdcw
ceramic; disc; 10 uuf 5%; 500
vdew
molded silver mica; 200 uuf 5%;
500 vdcw
same as C28
ceramic; disc; .01 uf +80-20%;
600 vdcw
ceramic; disc; 1500 uuf GMV
+100% max, ; 500 vdcw
cer.; disc;24 uuf 5%; 500 vdew
cer.; disc; 820 uuf +10%;500 vdcw
same as C102
same as C102
same as C102
mld. phen. tub. ; . 15 uuf #5%;
500 vdcw
same as C106
same as C101
same as C102
var.:air;8uuf min. to50uuf max.
cer.; disc; 3.9 uuf*.25 uuf;
250 vdew
MOTOROLA
PART No.
CAPACITOR, fixed: cont'd.
21K837746 ceramic; disc; 2000 uuf +10%;
500 vdew
same as C112
same as C112
21K830201 molded phenolic; tubular; . 3 uuf
+5%; 500 vdew
same as C31
same as C30
same as C106
samc as C106
21K837996 ceramic; disc; 3900 uuf +10%:
500 vdcw
same as C120
same as C3]
same as C106
same as C106
same as C31
same as C101
same as C30
same as C30
21K475679 molded phenolic; tubular;
0.82 uuf +10%; 500 vdcew
same as C31
same as C7
same as C7
NOT USED
8A892986 oil filled; tubular; .25 uf +20%;
400 vdcw
same as C30
same as C30
same as C30
same as C7
same as C30
same as £30
same as C7
21B401029 ceramic; disc; .02 uf +80-20%;
600 vdcw
same as C31
same as C30
same as C30
same as C31
same as C7
same as C30
same as C101
same as C30
same as C120
21K847601 molded silver mica; 1000 uuf
+5%; 500 vdcw
same as C31
21K840049 molded silver mica; phenolic
coated; 800 uuf 5%; 300 vde
same as C30
same as C142
sameas C7
same as C142
same as C112
same as C30
23K890624 electrolytic; tubular; 5 uf
+100-15%, 150 vdew
same as C30
same as C112
same as Cl42
8K85984 oil filled; tubular; .02 uf +20%;
400 vdcw
same as C31
same as C30
same as C102
same as C30
same as C30
same as C30
same as C30
same as C102
MOTOROLA
San Iias: DESCRIPTION
CAPACITOR-RESISTOR ASSEMBLY,
21K842354 tubular; consisting of:
Dual CAPACITOR; printed
circuit, silver paint on
ceramic form, each section
100 uuf; 300 vdew
One RESISTOR; fixed; carbon
47K 420%
CONNECTOR, receptacle: female;
9087120 single contact; round molded
mica filled phenolic base; for
1/8" diameter male pin
connector
9B86864 contact; polarized; round
molded black plastic base;
chassis mounted; does not
include 42A821428 RING,
connector retainer; ring must
be ordered separately
COIL,
24K836515 RF: Antenna; base stamped AD4;
includes 76A824120 CORE,
adjustable tuning and ClL,
c2L
24B824102 RF: Antenna; base stamped 102;
includes 76A824120 CORE,
adjustable tuning and ClH,
C2H
24K836518 RF: Plate; base stamped AD7;
includes 76A824120 CORE,
adjustable tuning and C3L,
: Rl
24B824104 RF: Plate; base stamped 104;
includes 76A824120 CORE
adjustable tuning and C3H,
Rl
24K836519 RF: Coupling; base stamped AD8
includes 76A824120 CORE,
adjustable tuning and C4L
,24B824106 RF: Coupling; base stamped 106,
includes 764824120 CORE,
adjustable tuning and C4H
24K836520 RF; Mixer Grid; base stamped
AD9; includes 76A824120
CORE, adjustable tuning and
C5L
24K824107 RF: Mixer Grid; base stamped
107; includes 76A824120
CORE, adjustable tuning and
C5H
24B840709 RF: lst Oscillator; base stamped
AR7; includes 46K881276
CORE, adjustable tuning;
coded ORANGE dot and C6,
c7
24B824105 RF: lst Multiplier; base stamped
105; includes 764824120
CORE, adjustable tuning and
c8L
24B838987 RF: Ist Multiplier; base stamped
AP7; includes: 764838181
CORE, adjustable tuning and
C8H
24K836516 RF: Injection; base stamped
AD5; includes 76A824120
CORE, adjustable tuning and
COL, C10L
24K824103 RF: Injection; base stamped 103,
includes 764824120 CORE.
adjustable tuning and C9H,
C10H
24K834778 IF: 12 mc IF - 1, base stamped
AA2; includes 70A824118
CORE, adjustable tuning and
Cll, RS
MOTOROLA
PART No.
24B824109
24B824110
24K 834779
24K 824111
24K824112
24K854048
24K840842
24A840728
24B840042
24K 840559
244855418
28K849416
6R6394
6R5591
6R6398
6R6031
6R6410
6R6428
6R6433
6R6397
6R6031
6R6446
6R5553
6R6377
6R6069
6R400490
6R400066
6R2075
6R6048
6R6479
COIL,
IF: 12 mc IF - 2,base stan
109; includes 76A824118
CORE, adjustable tu
C12
IF: 12 mc IF - 3; base s
110; includes 76A8241
CORE, adjustable tu
C13
CORE, adjustable tu
C14, R4
IF: 12 mc IF - 5; base sta
CORE, adjustable tu
‘ers
IF: 12 mc IF - 6; base sta
Cle
IF: 2nd IF - 1; base sta
R8
same as L14 except 2nd JF - 2
and includes C24, R9
IF: 2nd IF - 1; base sta
ARQ; includes 46K891110
CORE, adjustable tunjng,
coded GREEN dot and C25,
R10
RF: choke; 4 microhenry; coded
WHT-BLU dot
RF: choke; 1 microhenry; coded
RED- BLK dot |
RF: choke; 1.2 microhenry;
coded BLK-GRN dot
RF: choke; .52 uh
CONNECTOR, plug: male; |
single contact; brown bakelite
wafer insulator; cable
mounted
RESISTOR, fixed; carbon;
_ins; unless otherwise state
12K +10%
18K 410%
150K +5%
100K +10%
NOT USED
NOT USED
NOT USED
33K £10%
same as R8
same as R8
6.8K +10%
2.2 megohm +10%
22K £10%
100K
4.7 megohm +1 0%
100K +5%
470K +10%
2.2K 410%
8.2K £5%
220K 45%
12K £5%
47K 410%
68K +5%
same as R105
same us R104
same as R105
MOTOROLA
PART No.
RESISTOR, (cont'd)
same as R3
6R5644 82K +10%
6R5646 390K 410%
6R6117 5.6K +10%
6R6326 100 ohm +10%
same as R103
6R6270 220 ohm +10%
same as R115
6R5585 8.2 megohm +10%; used only
in TA237W and TA237S
same as R103
same as R3
6R488095 18K +5%; used in TA237W
only
or 6R5553 100K +5%; used in TA237S only
6R6414 270K +10%; 1/2 w; ins.
6R6046 1 megohm +10%
6R400228 1.5 megohm +5%
oR401006 56K +5%
6R5631 120K +10%
same as R128
same as R103
same as R3
same as R127
same as R127
same as R103
6R6477 15K 410%
same as R109
6R401006 56K +5%; used in TA237W
only
or 6R2061 180K +5%; used in TA237S only
same as R139
6R5773 820K +5%
18K845110 variable: carbon; 200K +20%;
1/4w
same as R128
6R5772 47K 45%
same as R3
6R6040 680 ohm +10%; used in
TA237W only
or 6R6270 220 ohm +10%; used in TA237S
only
same as R3
6R6407 220K +10%
same as R148
same as R127
same as R13
6R5796 560K +5%; used in TA237W
only
or 6R5587 lmeg. +5%; used in TA237S only
6R6497 3.3 megohm +10%
6R490110 3.9 megohm +10%
6R2089 1. 8K +10%
6R6434 27K +10%
same as R156
6R2097 6.8 megohm +10%
6R400334 12 megohm +10%
6R6475 680K +10%
same as R101
same as R104
same as R128
same as R120
same as R8
same as R11
TRANSFORMER,
1V 842353 discriminator; base coded
BLUE dot; included two
76A821495 CORE, adjust-
ble tuning; coded YELLOW
dot and G26, C27, C28, C29,
C30, C31, R11, R12 and R13
25K847479 AF: output; 5000 ohm to 3.2
ohm at 55 ma dc
REFERENCE
SYMBOL
MOTOROLA
PART Ne.
TUBE, electron
195T170A01 type 6AK5
195T225A01 type 6BC5
195T212A01 type 6AB4
195T175A01 type 6BH6
195T113A02 type 12AT7
195T147A03 type 6CB6
same as V106
same as V106
same as V104
195T176A01 type 6BJ6
195T111A03 type 6AL5
same as V104
195T179A01 type 6C4
same as V105
195T101A01 type 6AQ5
LINE; RF transmission:
30B849414 ~~ assembly: includes: _
30B850951 CABLE, RF:
coaxial; RG-58A/U; 4"
length required
reference part Pl]
SOCKET, tube: female;
9B834083 "7 contact; miniature; molded
mica filled phenolic base;
saddle mounting; includes
center shield and tube shield
base
same as XV10!
9K87124 7 contact; miniature; molded
mica filled phenolic base;
saddle mounting; includes
center shield
same as XV103
9B881243 9 contact; miniature; molded
mica filled phenolic base;
saddle mounting; includes
center shield and tube shield
base
same as XV101
9B87123 7 contact; miniature; molded
black phenolic base; saddle
mounting; includes center
shield
same as XV107
same as XV107
same as XV107
same as XV107
same as XV107
same as XV107
SOCKET, tube: female;
9B86868 9 contact; miniature; molded
black phenolic base; saddle
mounting; includes center
shield
same as XV107
SOCKET, crystal: female;
9K857508 4 contact; square molded
black bakelite base; chassis
mounted
9K861367 2 contact; rectangular; black
phenolic base; chassis
mounted
REFERENCE
SYMBOL
FILTER
CRYSTAL
Y101
Y102
MOTOROLA
PART Ne
TU540W PERMAKAY IF Filter; used in
60 kc models
TU540S PERMAKAY [IF Filter; used i
30 kc models
NOTE
Crystals are part of the Radio Set
model. When ordering a receiver
chassis only, crystals must be
ordered separately. Crystal type
number and operating frequency
must be specified when ordering
crystal.
CRYSTAL UNIT, quartz:
RM10-A Receiver Control; for 144-174
me carrier frequency;
includes 12 volt heater unit
Type G03 Receiver IF; 12.455 mc
FREQUENCY RANGES ViO4
CONTROL ates e fe eee eee ee awe ees
age MOUNTING PLATE C106 15 4 C7, s5 SAGs C118), 15 cng, . coo eee rt ATED IN OHMS % wa
M1041) 3 H (106% 3 HUM07)> 3 |. 08 70v 4 a shale
FF [e) 644840844 ; PeMIAD TIN Be Fe 6 (ae --—-| oF y \ L8iAA2) = fon = WOLN10 | Pe a ee PT ah ith Per ene
Ci4i : “a lcovy | ere cestan { += (=) | ! | \ | | NLESS OTHERWISE STATE
. z 9 c3 | ey se i
FE (G— _voiume contror fe WE dst | | Li Eek re
wt | 10iL) | | | |
xem J J
(9) (orm rouino> maw ann V4 4 4 i R105 2 i
‘ ew 01 Tov il é Rd ee '
DISCRIMINATOR PRIMARY T1 OM 2. fe wey » 4 oh "ee 1 ea este ean
fe = t AND DC VOLUME CONT! L AT MAXIMUM (CLOCKWI: )
a |
V5 ae | i nae |
820 M NENTS Wi RECEI
phe vit2 : etek
Vii4 2
ViO9 ees |
V4d3 ae be
455KC IF COIL Li5 - = = —— — = a
L14 455KC IF COIL FREQ. NO.1 (METER sochen) 1 v102 FREQ. NO.2 TO PIN © i201
455 KC i F Col L L4 6 OSCILLATOR | 1ST. OSG. 8 MULT. | aoe Ranaane ce (METER SOCKET) 1st ge. MULT Mees
Ty BE SHIELD TU BE SHIELD Le MoT 3) ao) Leouanziy® = T MODELS
U 26 A 890034 fy | relia =i as componenr [LROMZIAG/TAZ37W-R2=L | TRDI171AD/TA2375-R
| | | -R2- =
2648390034 emir | | ee | ee _ Jraow7eac/ TAZ R2-H TRON TRADATARSIS R
Vi08 Vi06 | Sih Me |e | tn oes = oer | ia
ViO7 IF CRYSTAL (Y102) MOT RT| oy | lee a | Ps
a | [ia Le == = so aue Te000 ent, & R40 | 56K | 180K
° HOLD-DOWN CLAMP r co a Fen res
fe>) = e i _
41A824763 mys oe :
= 455 KG t
a V105 BRN.-YEL Aas a TO PIN 4
= Jims he L13 12MCIF-6 : | 7 a , Pe = me
a o 5% 5 ‘2
7 Lit. 42MC IF-4 “Tames vor Tees | ,
42MCIF-3 LiO See ICIS ez Fg fesv cca. seme dua aan, ale Noe FRa. ae ol ie Soria new es E di ceo *
7 A | | | 1 uF M 24 E ae = 200
Vi04 Li2 I2MC IF-5 eS a és : ie cet =. 2 HE cay | atte, a Ce al ee ‘nd Ev) eet
= = | 6 ay | \ | 46V — mr e 200 |_4 z
12 MC IF-2 L9 —G 2lozv WW, | | re 2 2 Wd 3 alee Ree RI32 aS : RI33, R134 RIBS RI36 4s 2 RI37 ] RI2 | | oY
5 m 150K ' : 15K | ' ul | +
- L4 RF Col E Ring R20 ¢ 1.135 cise ICI37 gries) °K ak 190% 3 “or T st i ea aR on Soe é ag 28 oe Meee ae 3% np he ol o> T MEG © Linge | Bapyick
100K 220 o4 [2 [F S50K) ee i ] Es Ai, =e | A wHT-BRN—e] > C1 warcaeocal| aeons: cas cree = —? NOTES ee
- 5% F F yF I | 500 “a Hay || [ . ae M4 OISCI
{2MC IF 4 L8 V1IO3 ae at a eA ‘ a plis uy ale Je ‘ aL vere" be ull wel owe Me alse Je UE ili or if oe Me ul 1 goss . a3 ar | 5% me aes:
B+ 200V
L3 RF COIL 1 2
ie |
FROM ONG) TFL @— WETS SRNS te {
FROM DISCR. OUTPUT <————
MULTIPLIER COIL L6 L7 MULTIPLIER COIL oe ley we (po
TUBE SHIELD L2 RF COIL | Pee! ae acme | en Cron nn i, :
26890034 V201(2-FREQ.ONLY) rm es i eititian —— e ee ey ones "aaa ots
vio2 ViO4 3I sea ea
4ST OSCILLATOR COIL L5 MOUNTING POST ] — atl
46K848989
L1 RF: ANTENNA H
201(2-F) CRYSTAL al Pye |
ia 220K $220K $150 Dae ge A en | |
150K
= ie 2000 O1uF Ot pF ORG
(NOTE 5); 150K 3 33 Oo gory CE
+ a ote ee GRN -YEL
x = GRN -WHT = Y" Fil. Q
CONTROL CRYSTALS || :
(Y104) (ae Ne
(Y201) HOLD-DOWN CLAMP a Daaiceme ea =
(2-F) 444850844 : : oe mez}
RED
8+ 200V
ah
roan age
ia ; oa
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12. MC 4ST 1.F AMP.
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30
c123
ViOS-A
2ND MIXER
1/2 6679 /12AT7
C128
£91109)
ee RE ees bt Lit(aa3) Li2(ai4 ) Soa KG
3 oy : = = MEVIB) FILTER
| 1 (NOTE 5)
| | Il | |
| | | \ o15 1 | |
l | | | | 15 | |
J | | |
lao eal
3 |
= = + + 3900 | 3900 |
= 100K = => =
ee eS
= — 4 |
Z LL cree a eee
AR 1500
|
| |
B+
RNS 125
82K 1500
_jeies =
0.82 RI66
6.8K
80K
Vi05-B
2ND OSC
1/2 6679 \2aT7
5
102
12.455Mc =
TYPE G03 9 CI32 = ayi7
“i 5.6K
ad oy = vai
DISCR.
6AL5
E104
R140
vw!
5
100 ark |
vi09 Vi10 : -35V]
0449 7ov 3
1ST LIM dl 2ND. LIM. | 3 cee "/ |
| 6BHE 24 a ebuc | c26 S 200 100
| 240) 3 c29
2 200 4 z 4
: RM c30 Re
22 ‘
3 6800 TT -01mF MEG
eh ee -— 1 cies c 7 (NOTES)
; WHT -RED—= a eat 5% a
> => => TO PIN 2 = = 22k $500)
B+ (METER SOCKET) ‘ =
L aaa
o6 TO viNz
A = NOISE AMPL GRID
visa ber ces AUDIO FROM DISCR “i TO wit2
A slihgeat vid a GRN & Waiaee V4it5 a NOISE AMPL WHT. -GRN. PINS . a oan
aos OC AMPL ee POWER AMPL (METER SOCKET)
1/2 6679/\2AT7 {ST AUDIO 6AQ5
1/2 6679/12ATT W102 -9 TOON SG
YEL -RED {70V 190V. au THO1YEL {ST AUDIO
| | sf AUDIO OUTPUT
| TO SPEAKER
RIST7
ae iw 3.2 OHMS
i J102 -10
154 cise
Soe T° oF
ee Ts B+ 200V
NOTES:
4
COMPONENT
ALL RESISTOR’ VALUES ARE INDICATED IN OHMS +{0%, 1/2 WATT
UNLESS OTHERWISE STATED K-= {000 OHMS
ALL CAPACITOR VALUES ARE INDICATED IN MICROMICROFARADS
UNLESS OTHERWISE STATED
"y' INPUT VOLTAGE Is (2VDC
ALL VOLTAGES MEASURED WITH A VTVM (B+ * 200V) AND WITH
THE SQUELGH CONTROL AT MINIMUM (COUNTERCLOCKWISE )
AND OC VOLUME CONTROL AT MAXIMUM (CLOCKWISE ).
COMPONENTS NOTED DIFFER IN VALUE FOR THE VARIOUS RECEIVER
MODELS FOR WHICH THIS DIAGRAM IS APPLICABLE
REFER TO THE FOLLOWING TABLE FOR SPECIFIC IDENTIFICATION
MODELS
TRDMN71AC/TA237W-R2-L TROMN71AD/TA237S-R2-L
TRON72AC / TA237W-R2-H TRO1172AD/TA237S-R2-H|}
FILTER TUS4OW Tus40S
100K
RI25 18K
RI46 680 220
(oLUNE
BLK
> TOPING
(METER
1.5 MEG SOCKET)
5% 153
T 1500
BLU slo2z
METER
Rig2 >= C152 SITET
200K | {000
= = 8+ 200V. - BED - 7
FROM osc, «WHT BLU I_<g
FROM DISCR Se 5
FROM (ST. LIM 2 age 2
FROM 2NO 1 fF ¢—WHE-BRN I ,
FROM DISCR. OUTPUT aie ail 4
aux. |
FROM 10
AUDIO |
ouTPUT 9
BLK c “
POWER SUPPLY
TERMINAL BOARD
aux._|
vn RN lal
oO ors. ||
; Il
GRN -YEL *yFIL.
*y" FIL, ¢——— 4
B+ 200V. ols BED : (10) B+ 200v.
ee ee
FREQ.2
at
eal
201
CRYSTAL HEATER
—o Bo +
C210
YIOt
CRYSTAL HEATER E1500
ees Tike
lL. 415 x +
T8170
VIG = O1UF
is Sirus =|
v2ot
af 3
; C206
oe
vyo2 =
ig : : ties i
| O\UF =
vio3
i J
467
vioy Ofer T
af 3
vio6
cies 7
620. acer + 3f Ne il
a e172
T OtpF
4
at CRYSTAL & HEATER
t + ee ||
a1 |
tour Ri64 |
Vand e260 Vii | 1 |
a
af 3 4 Ms | |
ie if | |
A
m Papen!
{ af a $-------!
Vito vio8
+ af 3 | 3 4 o80
Oao
Vita vite
| le I mM
a= (NOTE 3) y
GRN-YEL
"4
TERMINAL IDENTIFICATION
BOTTOM VIEW
OF COILS
COLOR CODE
BLU
MODEL TABLE
HASSIS
SUFFIX
FREQ.
RANGE
[ SERIES TWO-FREQUENCY
TRON71AC/ TA237 W-R2-L 5 144-152MC
TRDIITOAC/ TA237 W-R2irRp1172 AC TAZ37W-R2- 152-174MC
TRONTIAD/TA237S-R2-L| 144-152MC
TROWNTOAD/TA237S*82 [rap 72AD/TAZSTS-R2- {52174MC
—® TO SQUELCH CONTROL
REVISIONS
CHASSIS REF.
a, a ae
TRD1171AC/
TA237W-R2-L-4
TRD1172AC/
TA237W-R2-H-4
TRD1171AD/
TA237S-R2-L-5
TRDI172AD/
TA237S-R2-H-5
33K RESISTOR
ADDED
63E854793-E
6.8K RESISTOR
ADDED
WAS 10 MEG
WAS .47 uuf AND
RELOCATED
CIRCUIT WAS AS
SHOWN BELOW
TRD1170AC/
TA237W-R2-5
TRD1170AD/
TA237S-R2-6
2ND OSC
RUS C125
180K [1800
63E854793-F
Vi05-B
2ND. OSC
1/2 6679 |2AT7
y102
12.455 MC =
TYPE GO3
C132
51 7. RAT
MODEL TA23
REMOVED
Two-Frequency Receiver
Schematic Diagram and Parts Location Detail
Motorola No. 63E862487-O
11/3/59-RCS
CE978C
CE1063A
AA
TRANSISTORIZED POWER SUPPLY
POWER SUPPLY
1. INTRODUCTION
The TPN6000BA is a fully transistorized
power supply with a common emitter circuit. It
provides all the plate, screen and bias voltages
required by the mobile radio transmitter and re-
ceiver. The transistorized circuitry replaces
the vibrator circuits commonly used in mobile
radio applications.
a. Basic Principle
The transistor circuit of the power supply is
essentially a single-pole, double-throw switch,
operating back and forth continuously. This
Switching action interrupts the flow of battery
current through the power supply transformer
primary. Interrupting the dc gives the effect of
ac and the transformer windings stepup the volt-
ages as required for the rectified outputs.
The input is connected to the transistor
emitters. The opposite ends of the transformer
are connected to the transistor collectors, which
alternately open and close the circuit to the dc
input. The current flows first through one tran-
sistor, then through the other, giving the effect
MOTOROLA INC.
Engineering Publications
11/3/59-RCS
4501 W. Augusta Blvd.
TRANSISTORS AND POWER SUPPLY
COMPONENTS
ON RADIO SET FRONT PANEL
of an alternating current. This circuit effec-
tively duplicates the action of a vibrator and is
used to replace the vibrator circuit.
b. Advantages
The transistorized power supply has several
advantages over the conventional vibrator supply.
These are: lifespan of the transistor exceeds
that of the finest vibrator, eliminationof vibrator
hash and lower battery drain requirements.
In addition, the transistor circuit has a
built-in protection factor not found in vibrator
supplies. A short inthe output does not damage
the transistors.
2. DESCRIPTION
The power supply is designed for a 12-volt
negative or positive ground electrical system.
COMMUNICATIONS DIVISION
Chicago 5], Illinois
68P856656-A
SCHEMATIC DIAGRAM PARTS LIST
Reference: MOTOROLA
Schematic Diagram
63E862487-O
PART No
REFERENCE MOTOROLA
SYMBOL PART No.
ecto | Es ‘manne
CAPACITOR, fixed: cont'd.
same as C102
same as C110
same as Cll]
same as C30
same C102
same as C112
same as C102
same as C3]
CAPACITOR, fixed: cont'd.
ceramic; disc; 2000 uuf 10%;
500 vdcw
same as C112
same as C112
molded phenolic; tubular; . 3uuf
45%; 500 vdcew
same as C31
same as C30
same as C106
same as C106
21K837996 ceramic; disc; 3900 uuf 10%:
500 vdcw
same as C120
same as C31
same as C106
same as C106
same as C31
same as C101
RESISTOR, (cont'd)
r R8 6R6410 33K +10% RESISTOR, fixed; carbon; 1/2 w;
24K836516 RF: Injection; base stamped R9 same as R8 ins; unless otherwise stated
AD5; includes 764824120 R10 same as R8 6R6434 27K 410%
CORE, adjustable tuning and RI 6R6428 6. 8K 410% same as R156
C9L, C1OL | Rl2 6R6433 2.2 megohm +10% 6R2097 6.8 megohm +10%
24K824103 RF: Injection; base stamped 103; Ris 6R6397 CASE) 6R400334 12 megohm +10%
includes 76A824120 CORE, 6R6475 680K £10%
adjustable tuning and C9H, R101 6R6031 100K same as R101
C10H R102 6R6446 4.7 megohm +10% same as R104
24K834778 IF: 12 mc IF - 1; base stamped R103 6R5553 100K £5% same as R128
AA2; includes 76A824118 R104 6R6377 470K £10% same as R120
CORE, adjustable tuning and R105 6R6069 2.2K +10% same as R8
Cll, R3 R106 6R400490 8.2K £5% same as Rll
24B824109 IF: 12 mc IF - 2jbase stamped R107 6R400066 220K +5% 6R400066 220K +5%
109; includes 76A824118 R108 6R2075 12K 45% 6R2075 12K 45%
CORE, adjustable tuning and R109 6R6048 47K +10% NOT USED
C12 R110 6R6479 68K £5% NOT USED
24B824110 IF; 12 mc IF - 3; base stamped R111 same as R105 6R400490 8.2K +5%
SOCKET, tube: female;
same as XV107
same as XV107
same as XV107
same as XV107
same as XV107
same as XV107
9B86868 9 contact; miniature; molded
black phenolic base; saddle
mounting; includes center
shield
same as XV107
same as XV101
CAPACITOR, fixed: unless other-
wise stated
21R490602 ceramic; tubular; 10 uuf 25%;
500 vdcw
21R400072 ceramic; tubular; 6 uuf +.5 uuf;
500 vdcw
21R114052 ceramic; tubular; 56 uuf +10%;
500 vdcw
21R87127 ceramic; tubular; 36 uuf 25%;
500 vdcw
same as C1L
21R121918 ceramic; tubular; 6 uuf +.5 uuf;
500 vdcw
21K836528 ceramic; disc; 14 uuf +5%;
CAPACITOR-RESISTOR ASSEMBLY,
tubular; consisting of:
Dual CAPACITOR; printed
circuit, silver paint on
ceramic form, each section
100 uuf; 300 vdew
One RESISTOR; fixed; carbon
21K842354
SOCKET, crystal: female;
9K857508 4 contact; square molded
black bakelite base; chassis
Bao sacs same as C30 47K 420% 110; includes 76A824118 R1il2 same as R104 ted
21R490605 ceramic; tubular; 12 uuf 25%; same. 38)\C30 CORE, adjustablejfning and Ris aes ae aiaaaee a8 2 contact :
21K475679 molded phenolic; tubular; CONNECTOR, receptacle: female; i IEE) eaacramiastox: ba tig ae ee Raa abe becg Guess
Sodledce : (ici R114 same as R3 olic base; chassis mounted
dot; includes two 764821495 :
CORE, adjustable tuning;
coded YELLOW dot and C26,
C27, C28, C29, C30, C31,
0.82 uuf 10%; 500 vdew 987120
same as C31
same as C7
same as C7
single contact; round molded
mica filled phenolic base; for
1/8" diameter male pin
connector
24K834779 IF: 12 mc IF - 4; base stamped R115 6R5644 82K 410%
AA3; includes 76A824118 R116 6R5646 390K +10%
CORE, adjustable tuning and R117 6R6117 5.6K +10%
C14, R4 R118 6R6326 100 ohm +10%
same as C1IL
same as C1lH
21K840716 ceramic; disc; 24 uuf +5%;
500 vdcw
same as XY101
64 : ized:
21K840711 mnaidediasiverearess/51 cats % NOT USED 9C 868 11 contact; polarized; round 24K824111 TH: 12)me IF)=/5})baed stamped R119 Sane ROS R11, R12, R13
500 vdcw Balu92986 oil filled; tubular; .25 uf #20%; pooldedibie chipiasicibase, 111; includes 764824118 R120 6R6270 220 ohm +10% pEULEE:
21K836528 ceramic; disc; 14 uuf 25%; ASO aEN chases siea oumcedadessinod CORE, adjustable tuning and R121 same as R115 Gas He SOBER; 5000 ob ie iors
same as C30 include 42A821428 RING mead 8 at 55 4
500 vdcw ae fe eens jeanne C15 R122 6R5585 8.2 megohm +#10%; used only in Bae 2) OS nee DERMAKAY IF FulLece meee
21R791561 fixed: ceramic; tubular; 6 uuf games C20 itt ites een Ra 24K 824112 IF; 12 me IF - 6; base stamped TA237W-R2 and TA237S-R2 Pe eas '
same as C30 be ordered separately aa TUBE, electron © mode
+ 5 qut= 500 vdew jae 112; includes 764824118 TOR TATOACIIGGSOEAKE
21R31492 ceramic; tubular; 20 uuf 5%; game 2S eo cote CORE, adjustable tuning and ae Se type <s
sidahetad saan kneaa 24K836515 RF: Antenna; base stamped AD4; ie Se Sse ee 195T212A01 Ee GAs TUS40S PERMAKAY IF Filter; used in
21R119296 ceramic; tubular; 16 uuf 5%; aetna Rac aTCA ATA TS OTEORE SE 24K 854048 IF: 2nd IF - 1; base stamped Rize same as R3 ReERGeKOl Bs ari 30 kc model
500 vdew sae as oF Ses 3 2 BC6; includes 46K891110 R125 6R488095 18K 45%; used in TA237W-R2 i ou Oo
Suivead C20) 21B401029 ceramic; disc; .02 uf +80-20%; adjustable tuning and ClL, CORE, adjustable tuning; only 195T113A02 type 12AT7
21R114153 ceramic; tubular; 47 uuf +10%; 600 wew, C20 coded GREEN dot and C23, or 6R5553 100K +5%; used in TA237S-R2 only 195T147A03 type 6CB6 CRYSTAL
500 vd > same as C31 24B824102 RF: Antenna; base stamped 102; R8 same as V106
ihe! Serieine (G40 includes 76A824120 CORE, Nae 6R6414 270K #10%; 1/2 same as V106
21R474573 ceramic; tubular; 50 uuf +5%; A i same as L14 except 2nd IF - 2 o; 1/2 w; ins NOTE
500 vdew same as C30 adjustable.tuning and ClH, and includes C24, R9 R127 6R6046 1 megohm +10% ; same as V104
21R475262 ceramic; inbular; 15 uni 45%; same as C31 DER ETEEID a ; 24K840842 IF: 2nd IF - 1; base stamped R128 6R400228 1.5 megohm +5% 195T176A01 type 6BJ6 Crystals are part of the Radio Set
500 vdcw same as C7 2 RF: Plate; base stamped AD7; ARQ; includes 46K891110 R129 6R401006 56K £5% 19STII1A03 type\bAL5 model. When ordering a receiver
21R475261 ceramic; tubular; 12 uuf +5%; same as C30 ee oe ee ere CORE, adjustable tuning; R130 6R5631 120K £10% same as V104 chassis only, crystals must be
500 wdew same as C101 ae e tuning and C3L, coded GREEN dot and C25, R131 same as R128 195T179A01 type 6C4 ordered separately. Crystal type
same as C13 same as C30 R10 R132 same as R103 same as V105 number and operating frequency
Saire ae CAE same as C120 24B824104 Bey Plate; base stamped 104; R133 PayneeeR S| 195T101A01 type 6AQ5 fiuetbetaretiaaitwieniesdertas
21R890124 Serene: tables kl ant 45%; ae oay molded silver mica; 1000)uuf pneludesii 2824120 CORE 244840728 RF: choke; 4 microhenry; coded R134 same as R127 same as V102 Eyal.
500 io / ‘ #5%; 500 vdew slong UES) at WHT-BLU dot : R135 same as R127 NES
sermecas Cod : 24B840042 RF: choke; 1 microhenry; coded R136 same as R103 ; RF transmission: ;
21K840049 molded silver mica; phenolic 24K836519 RF: Coupling; base stamped AD8 RED-BLK dot R137 6R6477 15K £10% 30B849414 assembly: includes: a oe 144-174
same as C2H
same as C2H
includes 764824120 CORE,
adjustable tuning and C4L
24K 840559 RF: choke; 1.2 microhenry; R138 same as R109 30B850951 CABLE, BUD
coded BLK-GRN dot R139 6R401006 56K +5% used in TA2Z37W-R2 coaxial; RG-58A/U; 4
coated; 800 uuf +5%; 300 vde
same as C30
me carrier frequency;
includes 12 volt heater unit
same as C2H 24B824106 RF: Coupling; base st d 106;
ica: ; same as C142 aera ec rate 244855418 RF: choke; .52 uh only length required :
ee Sees os Beh sameas C7 rrcend Gene aaron, or 6R2061 180K +5% used in TA237S-R2 only reference part Pl Receive> IF; 12.455 mc
: 2 same as C142 CNC MEN OEY ctl LS t 2nd Oscil- R140 ‘same as R139
Fe Seana Cisce BE say = eee same as C112 24K83 6520 Waste HARES GIGS IS CLS ec Vator and fnelede@e201; R141 6R5773 820K +5% SOCKET, tube: female; SE a)
21K840812 m ee mica; 200 uuf 25%; same as C30 SOK) ATIC PAS BaD C202 R142 18K845110 variable: carbon; 200K +20%: 95834083 7 contact; Tei snes
ae : ? 23K890624 electrolytic; tubular; 5 uf ara COPECO Use By 08 244840728 RE! choke; 4 uh;coded 1/4 w aa filled a “a aa
+100-15%; 150 vdcew WHT-BLU dot R143 same as R128 sa e mounting;
same as C28 O% ty 24K824107 RF: Mixer Grid; base stamped Beer ny o R144 6R5772 47K 45% center shield and tube shield
113 ; disc; .01 uf +80-20%; ats us
PMS) ieee Fs same as C30 107; includes Sete a 24K840559 RF: choke; 1.2 uh; coded BLK- R145 same as R3 base aint
same as C112 CORE, adjustable tuning an GRN dot \ R146 6R6040 680\ohm £10%; used in RaineAs
| TA237W-R2 only 9K87124 7 contact; miniature; molded
215800801 ceramic; disc; 1500 uuf GMV
mica filled phenolic base;
C5H
same as C142
+100% max, ; 500 vdcw : E 24B840709 RF: Ist Oscillator; base stamped ta
“tem 2 K85 : rie 420%; CONNECTOR, plug: male;
21K 840365 cer. ;disc:24 uuf £5%; 500 vdcw 8 984 oil peered 02 uf 420% AR7; includes 46K881276 28K849416 single contact; brown bakelite or 6R6270 220 ohm £10%; used in saddle mounting; includes
21B837745 cer.; disc; 820 uuf +10%;500 vdew Bae eat CORE, adjustable tuning; matectinealatorieanle TA237S-R2 only center shield
same as C102 ee era coded ORANGE dot and Cé, mounted R147 payne raarRs| same as XV103
same as C102 ee a aaa c7 R148 6R6407 220K £10% 9B881243 9 contact; miniature; molded
same as C102 24B824105 RF: lst Multiplier; base stamped RESISTOR, fixed; carbon; 1/2 w; R149 same as R148 mica filled phenolic base;
same as C30
same as C30
same as C30
same as C30
same as C102
ins; unless otherwise stated R150 same as R127 saddle mounting; includes
6R6394 12K £10% R151 same as R13 center shield and tube shield
6R5591 18K +10% R152 6R5796 560K £5%; used in TA237W-R2 base
6R6398 150K +5% only same as XV101
6R6031 100K +10% or 6R5587 Imeg. 45%; used in TA237S-R2 only| 9B87123 7 contact; miniature; molded
NOT USED R153 6R6497 3.3 megohm +10% black phenolic base; saddle
NOT USED R154 6R490119 3.9 megohm +10% mounting; includes center
NOMUSED R155 6R2089 1.8K 410% shield
21K881064 mld. phen. tub. ; . 15 uuf £5%;
500 vdcw
same as C106
same as C101
same as C102
20B840719 var.; 8 uuf min, to 50 uuf max.
21K838284 cer.; disc; 3.9 uuf.25 uuf;
250 vdew
105; includes 764824120
CORE, adjustable tuning and
c8L
RF: lst Multiplier; base stamped
AP7; includes: 764838181
CORE, adjustable tuning and
C8H
24B838987
same as C6
same as C7
Me
byes ate Sis; wre
_
Pa
_
7 ay on
™ or - as
es fake iy
ary |
PERFORMANCE SPECIFICATIONS
INPUT REQUIRED 12 v de negative or positive ground.
OUTPUT RATINGS Transmitter:
High B+
Low B+
Osc. Bt
Bias
Receiver:
Bt
The power supply chassis mounts between
the transmitter and receiver of the radio set.
The dc input and control circuits are brought in
through a 19-pin male connector in the front
panel. The various rectified outputs are routed
to terminal boards on the wiring side of the chas-
sis for the transmitter and receiver connections.
An 18-lug terminal strip on one side is used for
the transmitter connections; a15-lug strip on the
other side is for receiver connections.
Two alloy junction P-N-P transistors, de-
signed for high power audio frequency applica-
tions, are connected in an electronic switching
circuit which is basically a multivibrator. The
operating frequency is in the audio range.
The transistors are mounted on a cast-
aluminum radiator (called a ''heat-sink'') on the
front panel of the radio set. The radiator con-
ducts heat away from the transistors, permitting
them to operate safely at relatively high ambient
temperatures. The heat-dissipating capacity of
the heat-sink provides safe operation under the
most adverse temperature conditions normally
encountered in mobile radio operation.
CAUTION
The transistor feedback circuit in this
power supply is under a protective cover.
The cover prevents accidental shorting of
the enclosed components withconsequent
damage to the transistors. Do not re-
move this cover unless necessary for
servicing components. Always replace
the cover before restoring operation.
3. OPERATION
a. Introduction
The function of the mobile radio power sup-
ply is to convert the low-voltage dc input to the
various high-voltage dc outputs required for op-
eration of the transmitter and receiver. This is
accomplished in several steps, each of which is
treated separately in succeeding paragraphs.
First. Changingthe dc into ac -- Transistor
Circuit.
Second. Stepping up the voltage of the ac --
Power Transformer.
Third. Converting the high voltage ac to dc
-- Rectifier-filter Networks.
b. Transistor Multivibrator Circuit
(1) Function,
The function of the transistor multivi-
brator circuit is to change the pure dc input into
pulsating dc, a form of ac, so that it can be
stepped-up in voltage by transformer action.
The operation is illustrated in the simplified
functional diagram, Figure 1. The diagram
shows a negative ground electrical system. For
a positive ground electrical system, reverse the
leads to the polarity reversing terminals.
(2) Operation
The ON-OFF switch at the control head
connects the 12 volt dc input to pin #19 of the
CEPD-1267-A
CONTROL HEAD
ON-OFF SWITCH
POLARITY
REVERSING
TERMINALS
PIN 49
POWER &
CONTROL PLUG
42 VOLT DC
BATTERY
if;-_Sbiifif
CONNECTIONS SHOWN FOR
NEGATIVE GROUND SYSTEM
YOLVTTISSO OL LAdNI 9d
FEEDBACK NETWORK
USED FOR RECEIVING
aL
TRANSMIT - RECEIVE
RELAY IN RECEIVE
POSITION
power and control plug on the power supply.
When the switch is ON, one side of the dc input
positive potential is applied to the transistor
emitters and the receive feedback network. The
negative side is connected to the primary center
tap of the transformer and the starting resistor.
(a) Feedback Path
The path through the "receive''
feedback network leads to the center tap of the
feedback winding of the transformer. The oppo-
site ends of this transformer winding are con-
nected to the two transistor base elements. The
starting resistor is connected between the center
tap and the dc input. Current flows through the
feedback network and starting resistor, applying
a bias to the base elements of each transistor.
Due to a slight unbalance in transistor conduc-
tivity, one will tend to conduct more heavily than
the other. This is the effect which starts the
oscillation cycle.
(b) Transformer Primary Path
The dc path through the center tap
of the maintransformer primary winding leads to
STARTING
RESISTOR
T1
PRIMARY
/
Ti
gel tia
FEEDBACK NETWORK
USED FOR
TRANSMITTING HIGH VOLTAGE
OUTPUT
INDUCTIVE FEEDBACK
the two transistor collector elements, which are
connected to opposite ends of the winding. The
slight unbalance in transistor conductivity causes
more current to flow through one primary half-
winding than through the other. The current path
is through the primary half-winding and the tran-
sistor (emitter-to-collector) to the dc input. The
current in the transformer half-winding induces
voltages in the two feedback half-windings. Po-
larity is such that the more heavily conducting
transistor is quickly biased to full conduction;
the other transistor is quickly driven to cut-off.
(3) Oscillation Cycle
The induced feedback voltage drops to
zero as the current through the conducting tran-
sistor reaches the point of saturating the trans-
former core. The cut-off transistor begins to
conduct, reversing the polarity of the voltage in
the feedback windings and conduction througn this
transistor increases inducing greater feedback
bias and quickly cutting off the first transistor.
Current through the second transistor then
reaches core saturation, completing a cycle of
oscillation. The circuitry is designed for self-
Sustaining, continuous oscillation as long as the
dc input is applied. First one transistor con-
ducts to core saturation, then the other. Thus,
the current alternates between the two primary
half-windings. The switching action is very rap-
id and the voltage induced in the feedback winding
of the transformer approximates atypical ''square
wave" pattern. The overall effect of the transis-
tor oscillator circuit is essentially that of a
single-pole, double-throw switch operating back-
and-forth continuously.
(4) Feedback Networks
Separate drive requirements are neces-
Sary - one for receive conditions and one for
transmit conditions. These are provided by the
feedback networks. For receive conditions, the
feedback paths are a series combination of the
receive feedback network and the transmit feed-
back networks. These networks provide the pro-
per bias. To increase the drive required for
transmit conditions, the receive feedback net-
work is bypassed through closed relay contacts,
thus utilizing only the transmit feedback networks.
ce Power Transformer
The main purpose of the power transformer
is to provide a high voltage ac output with a low-
voltage ac input. A special transformer is used
in this power supply to provide the feedback re-
quired for the transistor oscillator circuit in ad-
dition to the high voltage ac output. There are
two separate high voltage secondaries for the B+
outputs and one low-voltage secondary for the
bias supply.
d. Rectifier-Filter Networks
Refer to Schematic Diagram 63E856657.
(1) Receiver B+ Section
The receiver B+ rectifier-filter network
converts the high voltage ac induced in the trans-
former secondary to a smooth de output required
for the receiver plate circuits. This section
consists of a full-wave silicon bridge rectifier
(CR5,.CR6, CRT and CRS) a pi” section iiiter
and a bleeder resistor.
The high voltage ac is connected to op-
posite corners of the bridge circuit. On one half-
cycle rectifier CR5 conducts toward the trans-
former and CR8 conducts in the direction of the
filter and load, which completes the circuit to
ground. On the other half-cycle CR7 conducts
toward the transformer and CR6 conducts cur-
rent toward the filter. The filter network
smoothes out the ripple in voltage and current.
The output of this section is connected
to a set of normally closed contacts of relay Kl
in the de-energized (receive) condition. These
contacts route the output to the B+ terminals of
the receiver terminal board. B+ is applied tothe
receiver continuously except when the transmit-
ter is turned on. Relay KI is then energized and
the receiver is muted, since its B+ circuit is
broken. The relay contacts then switch the B+
output to the transmitter terminal board, where
the B+ is used for the transmitter oscillator and
multiplier stages during the ''transmit" period.
(2) Transmitter Bt Section_
The transmitter B+ section provides
high and low B+ outputs to the transmitter when
the transmit-receive relay (Kl) is energized.
Pressing the push-to-talk button operates this
relay andits contacts complete the circuit to the
rectifier, CR2 and CR4. The rectified output is
connected so that its B+ output is added to the
output of the multiplier B+ section, providing a
transmitter B+ of approximately 400 volts. This
output is filtered and routed through closed con-
tacts of relay Kl to the transmitter PA B+ ter-
minal.) boelor
The full winding of the transformer sec-
ondary provides an intermediate B+ source for
the transmitter multiplier stages. The bridge
network consisting of CR5 to CR8 is used as the
rectifier inthis circuit. The multiplier B+ out-
put is filtered and routed through terminals of
relay K1 to the transmitter terminal board. The
multiplier voltage is shorted out during receive
conditions through contacts of relay Kl. The
transmitter oscillator screen voltage is obtained
from the same source as the multiplier Bt
through a dropping resistor network.
The HI-LO switch is in the transmitter
(PA screen) circuit. The HI position is the nor-
mal operating position. The LO position is used
for transmitter tuning purposes before the final
amplifier of the transmitter is fully aligned.
(3) Transmitter Bias Section
The transmitter bias section includes a
low-voltage secondary of transformer, Tl, rec-
tifier CR9 and a filter network. The -23 volts
bias output appears on TB3-13 for connection to
the transmitter PA grid circuit.
e. Relay Operation
The transmit-receive relay, Kl, is a 12 volt
dc relay. One side of the relay coil is connected
to the 12 volt bus. To energize the relay, the
other side of the coil must be grounded.
In the de-energized condition, all operating
voltages for the receiver are supplied through the
contacts of the relay. When the push-to-talk cir-
cuit is grounded, the relay becomes energized
and the relaycontacts are switched. The switch-
ing removes the B+ voltage fromthe receiver and
supplies operating voltages to the transmitter
stages. Therefore, the receiver is muted and
the transmitter is turned on when the relay is
energized.
4. TRANSISTOR CHECKING
a. Meter Considerations
A standard ohmmeter can be used to test
P-N-P type power transistors for an open or
short circuit. When testing transistors, it is
important to establish the polarity of the meter
leads. This can be done by using a de voltmeter
or by reference to the schematic diagram of the
ohmmeter. The actual numerical readings ob-
tained will vary with the type of meter used,
range setting, and the condition and temperature
of the transistor.
be Test Procedures
(1) Completely disconnect the transistor
from the circuit.
NOTE
The most common failure in switching
circuits is a short (emitter-to-collec-
tor). If the transistor does not show a
short, proceed with steps 2 through 4.
(2) Connect the positive lead of the ohmme-
ter to the transistor emitter. Connect the nega-
tive lead to the collector. Leave the base circuit
open. A normal transistor will indicate approxi-
mately one hundred ohms and may be as high as
several hundred ohms.
(3) Connect the base to the collector. The
meter indication should then drop.
(4) Connect the base to the emitter. The
meter reading should then be higher than that of
step 2.
HI-LO
SWITCH
TRANSFORMER
LAMP
TRANSMIT-
RECEIVE
RELAY
3- SECTION
MYLAR CAPACITOR
SILICON
RECTIFIERS
AEPD-1538
Parts Location Detail
Motorola No. AEPD-1538-O
11/3/59-RCS
AEPD-1538-O (CE1063-B)
ee
BLU SHIELD AUDIO
BLK AUDIO
ORG SHIELDED
RED SHIELDED
ORG SQUELCH
WHT-ORG VOLUME CONTROL
REO B+ 200 VOLTS
. BLK
<q
12]
POLARITY
139 REVERSING
(NOTE 3)
rt _t2_
wa oy RED RED
| sa: SOUH
F2
| .
ad
R2I
33
2w
iJ
3<J
ie GRN - SHIELD
me BLK
a4
POWER AND CONTROL
eoeeoeeee @
(233) 4s cere. ce
7@ © —@H ©
9 10 4 42 43 14 15 46
e@ee0e01ee8e @
REVISIONS
DIAG. CHASSIS REF.
NSSUEI se) SUFEDGb. alsyMBoul: — CBANGERS |p LDCAnON
TPN6000BA-3
BLU-YEL
REO-YEL
D TPN6000BA-4
WHT-BLK
| PARTNUMBER NUMBER
CHANGED
| POWER
TRANS -
FORMER
EL
SECONDARY
CIRCUIT
REMOVED
REMOVED a
SECONDARY
CIRCUIT
Tl OULPUL
CIRCUIT
WAS
COMMON LEAD
CODED “c*
LN6155A 2-FREQ.
IRCVR FILTER KIT
ADDED TO SCHEMAT- TB2 & Jl
IC FOR REFERENCE.
SEE NOTE 4.
FRONT
E TK661-1 Ql, Q2 [WAS 48A125286 PANEL. SEE
NOTE 2
TPN6000BA Power Supply
Schematic Diagram
Motorola No. 63E856657-E
11/3/59-RCS
TRANSFORMER
LAMP
SILICON
RECTIFIERS
Parts Location Detail
Motorola No. AEPD-1538-O
11/3/59-RCS
TRANS MIT-
RECEIVE
RELAY
3-SECTION
MYLAR CAPACITOR
AEPD-1538
AEPD-1538-O (CE1063-B)
a SIN New ae Bee ie a =
! 47-W/2 NOTE a |
| «
| ; 47-W/2 | |
| | RECEIVER | |
LD OOOOOODODOODGHO® |»
Y as
= ' bo
tect |__ BRU SHIELD AUDIO | a
120 120
tac BLK AUDIO rae REVISIONS
|
hb ~*~ + DIAG Pay i CHANGE LOCATION
= RED SHIELDED —-—— ISSUE SUFFIX
ORG SQURCH sn Cc TPN6000BA-3 Tl PART NUMBER POWER
fe CHANGED TRANS-
re MALTS ORG “VOEUMERCON TROL eas > 9] FORMER
a RED B+ 200 VOLTS onl REMOVED Tl
SECONDARY
P CIRCUIT
“a BLK CR3 REMOVED Tl
BLU- SECONDARY
ad TONE ee WHTEGRN CIRCUIT
(2
a POLARITY Tl OUTPUT
13 REVERSING CIRCUIT
(NOTE 3) WAS
| Fi L2 |
RED RED
IBA SOUR ce O |
TRANSISTOR DETAIL
(28 SS =
F2 P
os ! COLLECTOR REO ‘ BLu-YEL - 5 1
< T-GRN
eA BASE 3 :
EMITTER >)
COMMON LEAD | 3
o WHT- GRN CODED “c* | 3
BLU- ! ]
YEL | LOCATING RED-BLU t
RED-YEL | STUD | = |
4 !
O ! , = I
(ait euirrer base
WHT-REO as a
5 | COLLECTOR | COMMON LEAD !
8 | (MTG. SCREW) CODED “c* 1
“ | Ea /
| ( 5
Oo \ ‘1 a |
HS
\ LN6155A 2-FREQ.
WHT-TEL | RCVR FILTER KIT
& B rE D TPN6000BA-4 ADDED TO SCHEMAT- TB2 & Jl
GRN-BLK AI? me [toy EUBIES . IC FOR REFERENCE.
100 apr A) SEE NOTE 4.
| GRN-BLK WHT-BRNg GRN-BLK i | FRONT
a ES) RED-BLK Loma E TK661-1 Ql, Q2 [WAS 48A125286 PANEL. SEE
nx ¢ bi ones: NOTE 2
| ee | WHT-BLK 9 4. UNLESS OTHERWISE SPECIFIED:
; 2 | ALL RESISTOR VALUES ARE IN OHMS, * (0%, 1 WATT
e eS > SE 0) wrsven Ray K=1000 OHMS.
R2 ALL CAPACITOR VALUES ARE IN MICROFARADS.
33
2w | 2. COMPONENTS ENCLOSED IN DASHED LINES ARE
BLK-WHT 6 LOCATED OWN FRONT PANEL.
ImX < | 3. POLARITY REVERSING TERMINALS SHOWN FOR
5 : NEGATIVE BATTERY GROUND (BLK TERMINAL TO
1 ARROW). FOR POSITIVE BATTERY GROUND, REVERSE
1 THE TWO TERMINALS (RED LEAD TO ARROW).
1
i 2 4. TLN6GI55A RCVR. FILTER KIT IS P/O 2-FREQ
DIAGRAM FOR PARTS IDENTIFICATION.
GRN-YEL (2 VOLTS ;
im Ka
4 2
w ”
o|? 8
” 5 $ =
| 5 fe} [s)
>|t =
> gS i
< eg Te t
Per} m ult ot) ” 7)
we N a 1 rs i
S 5] = a @2 3
= “ 5 a ro) iJ
| 2 < z 2
o ° - =
rE x a ? !
5 Fe i < G z
fy GRN - SHIELD j 2 3} Cs a ¥
2 z i > z 4
8 a & ¥
' 1
{gq = ace o =} =
en : e 5
‘ 2
Kt DETAIL
Pi
POWER AND CONTROL (2) TBS
rh re 7 8
7@
°
TRANSMITTER MODEL TABLE
456 DESCRIPTION
@ «@® @ TPN GOOOBA- 4| TRANSISTOR POWER SUPPLY
9 1 4 12 43 4 15 16
eoeeeee e
TPN6000BA Power Supply
Schematic Diagram
Motorola No. 63E856657-E
11/3/59-RCS
MOTOROLA DESCRIPTION
PART No. te
FUSEHOLDER;:
9B820279 extractor post type; molded
black bakelite bayonet base;
single hole chassis mounted;
for 1-1/4" long x 1/4" dia
fuse; includes cap, lockwasher
and mounting nut
same as XF]
NON-REFERENCED PARTS
1V859763 MOUNTING BOARD ASSEMBLY,
rectifier:
riveted; includes:
1V859764 TERMINAL BOARD
ASSEMBLY: riveted; includes
5 pairs of mounting clips
and solder lug terminals
1V859765 TERMINAL BOARD
ASSEMBLY: riveted; includes
4 pairs of mounting clips and
solder lug terminals
1. INTRODUCTION
Experience has shown that there is a par-
ticular way of maintaining 2-way radio communi-
cations equipment that is far superior to any
other in achieving maximum operating efficiency
and reliability at least cost.
This procedure is known as ''System Mainte-
nance'', which simply means that the inspection
and maintenance of all units constituting the
whole is conducted in an established and orderly
fashion. The procedure should be conducted at
regular intervals inorder to yield all of the well-
known benefits of preventive maintenance.
All two-way radio communications systems
include integrated assemblages. A failure in any
one of these would constitute a failure of com-
munications. However, there are three major
factors in a mobile radio communications system
which require attention:
a. The primary power source
b, The basic radio units
c. The antenna system
Any successful maintenance program must
include the entire system. It would be of no
consequence to maintain the basic radio units at
top efficiency only to ignore the primary power
or the antenna. A failure in either one results
directly in a failure of radio communications,
Therefore, to be successful in preventive main-
tenance, a program should be developed and
closely followed on a basis of all-inclusive sys-
tem maintenance, Such a program should include
MOTOROLA INC.
AA
Engineering Publications
11/3/59-RCS
4501 W. Augusta Blvd.
ROUTINE MAINTENANCE
a periodic check on all the factors constituting
a radio communications system as follows:
a. Primary Power
Automobile batteries usually fail after a long
period of undercharging or overcharging, lack of
water, poor connectionsand old age.
It is important to measure the voltage avail-
able at the battery terminals when under a load.
A fully charged lead-acid battery will ‘have a
measured voltage of approximately 13.0 volts for
a 12 volt battery and 6.5 volts for.a 6 volt bat-
tery. An old sulphated or undercharged battery
may show lower voltages. These are battery
terminal voltages, not the voltage present at the
radio set. The terminal voltage at the radio set
will decrease when transmit current is being
drawn. The voltage will be lowered approxi-
mately 1.1 volts for a 12 volt system and ap-
proximately .8 volt for a 6 volt system.
One of the good methods of checking primary
power trouble is to measure battery voltage both
at the terminals of the battery and at the equip-
ment, An immediate drop in voltage of more
than .2 volts measured at the battery ona short
transmit cycle would indicate a battery in poor
condition. A drop of more than 1 volt measured
at the units would point totroubles in the primary
circuit--cable, fuse block, relay or chassis re-
turn, This voltage drop is excessive and should
be investigated fully.
‘Alt relay contacts wear out, requiring re-
placement.
COMMUNICATIONS DIVISION
Chicago 51], Illinois
68P856479 -B
PARTS LIST for Power Supply Diagram 63E856657-E
REFERENCE
SYMBOL
MOTOROLA
PART No.
23K859299
8K861326
23K858677
23K837903
23K850516
23K840707
23K850516
23K824135
21B801139
8K861614
48K859708
48K859726
65K8 04906
65K475248
28C802820
80D8 63333
25B837416
DESCRIPTION
CAPACITOR, fixed:
tantalum; 10 uf +75-15%; 25 vdcw
mylar; consists of:
1 uf 20%; 900 vdcew;
coded "A"
.47 uf 20%; 900 vdcw;
coded ''B"'
common connection; coded ''C"!
2 uf 20%; 400 vdcw; coded "'D"
electrolytic; tubular; 15 uf
+100-10%; 10 vdcw
same as C3
electrolytic; tubular; 10 uf
+50-10%; 450 vdcw
NOT USED
+100-10%; 15 vdcw
electrolytic; tubular; 25 uf
+100-10%; 50 vdcw
electrolytic; tubular; 125 uf
+100-10%; 18 vdcew
electrolytic; tubular; 25 uf
+100-10%; £0 vdcw
electrolytic; tubular; 5 uf +50-10%;
250 vdew
ceramic; disc; .01 uf +80-20%;
600 vdcw
mylar; tub. .47uf+10%; 100 vacw
CRYSTAL UNIT, rectifying: silicon
junction; cartridge:
NOT USED
type 1N1222
NOT USED
same as CR2
same as CR2
same as CR2
same as CR2
same as CR2
type 1N1219
FUSE, cartridge: one time;
slow blow type; glass; 15 amp; 32
volt; 1-1/4" long x 1/4" dia
slow blow type; glass; 8 amp; 32
volt; 1-1/4" long x 1/4" dia
CONNECTOR, receptacle:
male; 19 contact; polarized;
rectangular molded black
phenolic insulator; chassis
mounted
RELAY, armature:
dual stack; contact arrangement;
Satiatack, 1 form."B", 2
form ''C"', 2nd stack, 4 form
"A"; coil resistance 100 ohms;
does not include 15K848892
COVER, relay, nor 7A811735
BRACKET, relay cover
mounting; cover and bracket
must be ordered separately
REACTOR:
filter; 2.1 henries at 100 ma dc
REFERENCE
SYMBOL
MOTOROLA
PART No.
25B861375
484124376
6R118205
6R488035
6R6459
17C863951
6R5620
6R5574
6R118239
6R6415
6R6477
6R5766
6R5732
6R488016
6R6409
6R2079
6R488053
40A482097
25D865192
31A858723
31B802699
31B851408
COIL, AF:
choke; 50 microhenry
TRANSISTOR:
P-N-P
same as Ql
RESISTOR, fixed: carbon; +10%;
1 _w; ins.; unless otherwise stated
10 ohm £20%
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
NOT USED
47 ohm; 2 w
470K
wire-wound; 5 ohm; 5 w
same as R12
1. 8K ohm
220K
68 ohm; 2 w
100 ohm
15K; 1/2 w
NPA SE PI
15K; 2 w
33 ohm; 2 w
Zeeks
same as R20
68K; 2 w
220 ohm; 2 w
SWITCH, toggle:
spst
TRANSFORMER, power:
transistor controlled; consists
of the following windings:
primary #1; YEL, RED leads
with BLK center tap; total
resistance .045 ohms
primary #2; WHT-RED,
WHT-YEL leads with WHT-
BLK center tap; total
resistance ,085 ohms
secondary #1; BLU-YEL,
BLU-YEL leads; resistance
14. 5 ohms
secondary #2; RED-BLK,
RED-YEL leads with RED-
GRN tap; total resistance
10. 3 ohms
secondary #3; GRN-BLK,
GRN-BLK leads; resistance
1.81 ohms
BOARD, terminal:
2 screw terminals
14 solder lug terminals; board
coded 1 to 15
17 solder lug terminals; board
coded B, A, and 1 to 16
REFERENCE
SYMBOL
MOTOROLA
FUSEHOLDER;:
extractor post type; molded
black bakelite bayonet base;
single hole chassis mounted;
for 1-1/4" long x 1/4" dia
fuse; includes cap, lockwasher
and mounting nut
same as XF1
|
NON-REFERENCED PARTS
/1V859763 MOUNTING BOARD ASSEMBLY,
rectifier:
riveted; includes:
1V859764 TERMINAL BOARD
ASSEMBLY: riveted; includes
5 pairs of mounting clips
and solder lug terminals
1V859765 TERMINAL BOARD
ASSEMBLY: riveted; includes
4 pairs of mounting clips and
solder lug terminals
1. INTRODUCTION
Experience has shown that there is a par-
ticular way of maintaining 2-way radio communi-
cations equipment that is far superior to any
other in achieving maximum operating efficiency
and reliability at least cost.
This procedure is known as ''System Mainte-
nance", which simply means that the inspection
and maintenance of all units constituting the
whole is conducted in an established and orderly
fashion. The procedure should be conducted at
regular intervals inorder to yield all of the well-
known benefits of preventive maintenance.
All two-way radio communications systems
include integrated assemblages. A failure in any
one of these would constitute a failure of com-
munications, However, there are three major
factors in a mobile radio communications system
which require attention:
a. The primary power source
b, The basic radio units
c, The antenna system
Any successful maintenance program must .
include the entire system. It would be of no
consequence to maintain the basic radio units at
top efficiency only to ignore the primary power
or the antenna. A failure in either one results
directly in a failure of radio communications,
Therefore, to be successful in preventive main-
tenance, a program should be developed and
closely followed on a basis of all-inclusive sys-
tem maintenance, Such a program should include
MOTOROLA INC.
AA
Engineering Publications
11/3/59-RCS
4501 W. Augusta Blvd.
ROUTINE MAINTENANCE
a periodic check on all the factors constituting
a radio communications system as follows:
a. Primary Power
Automobile batteries usually fail after a long
period of undercharging or overcharging, lack of
water, poor connectionsand old age.
It is important to measure the voltage avail-
able at the battery terminals when under a load.
A fully charged lead-acid battery will ‘have a
measured voltage of approximately 13.0 volts for
a 12 volt battery and 6.5 volts for a 6 volt bat-
tery. An old sulphated or undercharged battery
may show lower voltages. These are battery
terminal voltages, not the voltage present at the
radio set. The terminal voltage at the radio set
will decrease when transmit current is being
drawn. The voltage will be lowered approxi-
mately 1.1 volts for a 12 volt system and ap-
proximately .8 volt for a 6 volt system.
One of the good methods of checking primary
power trouble is to measure battery voltage both
at the terminals of the battery and at the equip-
ment, An immediate drop in voltage of more
than .2 volts measured at the battery ona short
transmit cycle would indicate a battery in poor
condition. A drop of more than 1 volt measured
at the units would point totroubles in the primary
circuit--cable, fuse block, relay or chassis re-
turn, This voltage drop is excessive and should
be investigated fully.
‘Alt relay contacts wear out, requiring re-
placement,
COMMUNICATIONS DIVISION
Chicago 51, Illinois
68P856479 -B
Fuseg get tired, sometimes even when new
they may have too much resistance. Check and
replace if voltage drop exceeds .1 volt.
Connections loosen as a result of vibration.
Tighten or resolder.
Fuse Holders also loosen because of vibra-
tion. They lose their temper because of heat re-
sulting from poor contact. Acid causes cor-
rosion, Accumulation of oil and dirt increases
contact resistance and the remedial action is to
clean contacts, tighten or replace.
Keeping voltage drops to a minimum in a
primary circuit is very essential to good system
operation. The samerules apply to other sources
of power. Dry batteries especially must be
checked under full load. Some knowledge of the
number of hours of use must be available as an
indication of when they most likely will need to
be replaced.
b. Unit Assemblages
These include transmitter, receiver, power
supply, and associated units. Very few adjust-
ments need t
…[truncated]