Genave syncom vhf fm transceiver maintenance manual

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The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Use at your own risk. Unauthorized reproduction is prohibited.

This manual is for educational purposes only.
Genave shall not be liable for any loss or damages.
Copyright © 2007 Genave/NRC,

EA.

LIMITED

{ WAZA REARS OS

General Aviation Electronics, inc. (Genave), warrants this

‘oduct to be free from material defects for a period of 90 days
rom the date of purchase, provided the warranty registration
card properly filled out is returned by the purcheser to Genave
within 10 days after purchase. This warranty is limited to the
original retail purchaser and is not extended to second owners
of the product.

Our obligation under this warranty is limited to replacement
of any parts (except periodic maintenance items such as bulbs,
fuses, etc.) which, upon our examination, appear to us to be
defective in materials or workmanship. The parts will be re-
Placed within 45 days after receipt of the unit, provided the
unit is delivered to the Factory (Customer Service Dept., Gen-
eral Aviation Electronics, 414} Kingman Drive, Indianapolis,
Indiana 46226) within 90 days after the date of purchase, ship-
ping prepaid. All shipping costs and labor charges shall be born
by the purchaser

The owner may elect to have the unit repaired at an author-
ized Genave repair facility in which case Genave, within 45
days after receipt of the unit, will replace only those defective
parts returned shipping prepaid to the Factory (Customer Serv.
ice Dept., General Aviation Electronics, 4141 Kingman Drive,
Indianapolis, Indiana 46226). Purchaser shall bear any and al}
cnet costs including but not limited to labor, transportation and

reight.
is warranty does not apply to defects, malfunction, o¢
breakage due to improper installation of to the servicing thereof

by other than an authorized Genave dealer nor to units that
have been damaged by lightning or other acts of God, excess
current, or any units that have had serial number altered ot
removed. Abuse, misuse, tampering, submersion in water or
willful destruction of the unit will also void this warranty,

This warranty gives you specific legal rights. You also have
implied warranty rights. In the event of a problem with war-
fanty service or performance,

u you may be able to go to a small
claims court, a State court,

or a Federal District court.

Genave offers this warranty in Hien of any
and all other guarantees or warranties, either
EXPRESSED or IMPLIED, including but not
limited to warranties of merchantibility and/or
fitness for = particular purpose. Any implied
warranties are specifically and expressly limited
to the 90-day period specified herein. Damages
for breach of any warranties, either expreased
or implied are limited to replacement of any
defective parts as specified herein and any other
Incidental or consequential damages are ex-
pressly excluded.

Geasral Aviation Electrovics, 141 Kingrien Drivy, indiseagots, indiana 40228—Aree 317-548-1111

‘MARINE & LAND MOBILE Marine Pub. No. 0910009; Land Mobile Pub,

GENERAL AVIATION ELECTRONICS, INC,

4141 Kingman Drive, Indianapolis, Indiana 46226

AREA (317) 546-1111

Specifications subject to change without notice

No. 9910010

Printed in U,

This manual is for educational purposes only. The accuracy an

SrA sconeSeR ne prs: eee provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc. All rights reserved.

ech. Pub. No. 0540060

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.

CONTENTS

SECTION I GENERAL INFORMATION

1-1 Introduction

1-2 Description

1+~3 Specifications

1-4 Equipment Lists

1-5 Operating & Licensing The SynCom

SECTION 11 INSTALLATION MANUAL

Antenna Installation Warning
Introduction

Equipment Supplied

Equipment Required, But Not Supplied
Optional Equipment Available
Pre-Installation Check
Installation Planning

Fixed or Mobile Installation
Portable Operation

Accessory Connector - P101
Microphone Receptacle
Antenna Connector Assembly

i i
RRR OMON DUP WD Ee

Nor ©

oe ee oe ee or

SECTION III OPERATING MANUAL

3-1 Operating Controls
3-2 Operating Instructions
3-3 Licensing Information

SECTION IV MAINTENANCE MANUAL

Introduction
Theory of Operation - Synthesizer
Theory of Operation ~- Receiver
Theory of Operation - Transmitter
Disassembly
Reserved
Channel Programming - General
Synthesizer Adjustment
Receiver Alignment
0 Transmitter Alignment
1 SA-1 Subaudible-Tone Programming
2 Schematics and Component Location Diagrams

ie to te ee ee ee a eae
mH rer OMOnN AU WN Ee

Model; SynCom

SECTION I

This manual is for educational NE only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

ERAL iNFORMAT

acl 3

1-1. INTRODUCTION

Sections 1, 2, and 3 of this manual
contain all the information normally
required to license, install, and oper-
ate the Genave SynCom VHF communica-
tions transceiver.

The maintenance manual includes ail the
above information, and adds Section 4
(Theory of Operation, Alignment Proce-
dures, and Schematics). Section 5 lists
replacement electronic parts, as well
as major mechanical components.

1-2. DESCRIPTION

This VHF-FM transceiver is designed to
provide reliable, high-quality two-way
communications in the various Public
Safety, Industrial, and Business Radio
Services. The unit is capable of trans-
mitting and receiving frequency modu-
lated (16F3) radio signals on either of
two frequency bands: 150 -— 159.995 MHz
or 160.7 to 170.695 MHz.

The Genave SynCom radio is a VHF-FM
transceiver utilizing a single quartz
crystal and frequency synthesizer to
determine the operating frequency(ies).
A front-panel mounted rotary switch can
select either of two simplex channels
or one semi-duplex channel.

Simple internal adjustments allow the
transceiver frequencies to be set-up as
desired; thus, if a frequency change is
required, delays caused by crystal pro-
curement are eliminated.

NOTE: These adjustments MUST be
made by or under the immediate su-
pervision and responsibility of a
person holding a first- or second-
class radiotelephone operator li-
cense, who shall be responsible for
the proper functioning of the sta-
tion equipment.

Modétl= Sy nom educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or Lsbitea.
e

mave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.

9. A. fireproduction is prohibited.

If frequency synthesizer "unlocks," the
transmitter is "locked-out" to prevent
inadvertent operation on an unautho-
rized frequency. In this event, the TX
indicator WILL NOT glow when the micro-
phone push-to-talk switch is depressed.

The unit is completely solid-state,
employing the latest in semiconductor
and integrated-circuit technology. The
frequency synthesizer utilizes only one
quartz crystal to enable operation on
all business frequencies within the two
ranges, 150 - 159.995 & 160.7 -— 170.695
MHz.

The transmitter provides a minimum RF
output of 20 watts from 150.0 - 159.995
MHz, and a minimum of 15 watts from
160.7 ~ 170.695 MHz. A large heat sink
increases transmit-power stability. The
unit is designed to work into a 50-ohm
antenna, using a standard UHF co-axial
connector (83-1SP or PL259).

The receiver is a crystal~controlled,
dual-conversion superheterodyne employ-
ing an 8-pole monolithic crystal filter
for good selectivity. A single inte-
grated circuit performs limiting and
detection functions. A 10.7 MHz lst IF
provides good image rejection, while
the 455 kHz 2nd IF improves’ receiver
stability. A broadband (6 MHz) receiver
front end, normally set for 150 to 156
MHz, is utilized.

A 15-pin male plug mounted on rear pan-
el of the SynCom transceiver is desig-
nated as an "Accessory Connector," and
mates with a 15-pin female connector to
provide a convenient method of connec-
ting power or optional accessories to
the unit. Standard wiring of the acces-
sory connector utilizes only five pins,
leaving the remainder available for op-
tions or customized installation.

The internal speaker can be disconnec-
ted and replaced by an external speaker
via connections to the rear~panel plug.

The SynCom transceiver is designed to sions for changing frequency of subau-
operate on +13.75 volts DC power (neg- dible tone on one channel only. A ce~
ative ground). For mobile operation, ramic resonator on the SA~1 printed
the power source may be a battery or circuit board determines the frequency
. the vehicle electrical system. The Gen- of subaudible tone being used.
ave Model PSI-10 or PSI-31 power supply
can be utilized when it is desired to NOTE: If subaudible-tone system is
operate the instrument from a 117 volt, used, the carrier is automatically
50-60 Hz source. modulated by the subaudible tone
during entire time that transmis-
Provisions are made within each trans- sion is taking palce. Also, the op~
ceiver for the addition of an optional erating frequency must be monitored
SA-1 Subaudible-Tone Encoder/Decoder. to ascertain that it is NOT in use
This subaudible-tone system keeps the prior to originating a call. This
receiver squelched until a signal con- monitoring is accomplished auto-
taining the proper subaudible, contin- matically by any of the Genave mi-
uous tone is received. The SA-1 board crophones utilized with the sub-
generates the subaudible tone used to audible tone system.
modulate the transmitter to activate
the receivers in the system, and also The instrument is enclosed in an easi-
decodes incoming signals. Note that all ly removed, two-piece plastic case to
operating channels installed in a Syn- protect the unit from physical damage,
Com transceiver must utilize the same as well as from dust and dirt in the
tone frequency -- there are no provi- air.

1-3. SPECIFICATIONS

GENERAL:

Front—Panel Size: 3-3/8" (8.57 cm) x 9-3/4" (24.76 cm)

Over—all Dimensions: 3-3/8" (8.57 cm) x 9-3/4" (24.76 cm) x 12" (30.48 cm)
Power Supply: 13.75 VDC, negative ground; 11.5 VDC, minimum
Frequency Range: 150.0 - 159.995 MHz; 160.7 ~— 170.695 MHz
Frequency Stability: ~0005%

Number of Channels: 2 simplex, or 1 semi-duplex (both freqs in one band)
Temperature Range: -30°C to +60°C

Weight: Approx. 6 lbs. (2.72 kg)
RECEIVER:

Sensitivity: 0.25 uV typ., 0.35 uV max. for 12 dB Sinad;

0.45 uV typ., 0.55 uV max. for 20 dB quieting

Input Bandwidth: 6 MHz

Image: 70 dB, or better

Spurious: 65 dB, or better

Intermod: 70 dB, or better

Selectivity: +7.5 kHz

Adjacent Channel Reject: 60 dB

Modulation Acceptance: 7.5 kHz

Squelch Threshold: 0.2 uV, or less

Tight Squelch Threshold: 2 uV, maximum

Audio Output Power: 5 Watts; 4 Watts for 15% distortion

Hum and Noise Level: Better than 35 dB below rated putput
Frequency Stability: 001%

1-2 Model: SynCom

1-3. SPECIFICATIONS (Cont'd)

TRANSMITTER:
Frequency: 150.0 - 159.995 MHz; 160.7 - 170.695 MHz
Power Output: 25 Watts Typ; 150.0 - 159.995 MHz -- 20 Watts min.
160.7 -— 170.695 MHz ~~ 15 Watts min.
Output Impedance: 50 ohms
Current Drain: 6.5 amps
Deviation: 4 kHz, minimum; 5 kHz, maximum
Spurious: -57 dB (25 Watts)
Frequency Stability: 200052
Frequency Accuracy: +200 Hz
Subaudible Deviation: 1 kHz +200 Hz
Subaudible Freq. Tolerance: +0.3 Hz
1-4, EQUIPMENT LISTS 1-5. OPERATING & LICENSING THE SYNCOM
Section 2 of this manual contains lists Complete operating instructions, and
of equipment normally supplied with technical information needed for the
each SynCom transceiver, as well as F.C.C. station-license application, is
equipment required but NOT supplied, given in Section 3 of this manual.

and optional equipment available.

Model: SynCom 1-3

This manual is for educational purposes only .@&T ra a ss e information provided herein is not guaranteed or warranted.
Genave shall not be liable a s Mir : lea Ir own risk. Unauthorized reproduction is prohibited.
C) ig ©°2Z007 Gefave/NRC, Inc., all rights reserved.
LL STALLAT ION MAN 0 AL

2=1. ANTENNA INSTALLATION WARNING b. Mounting Bracket, with thumbscrews
and washers,
WARNING: Each year a number of persons

are electrocuted while installing radio c. Accessory Connector, 15-pin female.
antennas; therefore, use extreme cau-

tion when installing antenna/antenna- 2-4, EQUIPMENT REQUIRED, BUT NO
support for use with this transceiver. SUPPLIED

Observe following precautions:
a. Vehicle or Base Antenna, 50-ohm.
a. Do NOT attempt to erect antenna

while a thunderstorm is gather- b. Antenna Cable, RG=8A/U or RG=58A/U,
Ing. as required.

b. If installing antenna in vicini- c. Co-axial Connector, PL-259 (83-1SP).
ty of overhead wires, use a
wooden ladder rather than metal- d. Cabling for Power and Audio wiring,
116s as required.

c. Do NOT allow antenna, mast, or 2-5. OPTIONAL EQUIPMENT AVAILABLE
cable to touch electric signs or
overhead electric wires --- even a. SA-] Subaudible-Tone PC Board.

if only 120 or 240-volt wiring.

b. PSI-10 or PSI-31 AC Power Suppiy.
d. If antenna or mast starts to

fall toward overhead wires, get c. PSI-21 Portable Power Pack.
completely away. If the antenna
comes to rest against electrical d. Desk-Microphone, G-1l1

wires, do NOT attempt to remove
it, but call local power compa-

ny.
2-6, PRE-INSTALLATION CHECK
e. REMEMBER - UNDER THE RIGHT CON-
DITIONS, ANY CONTACT WITH AN Visually inspect the unit for any obvi-
ELECTRICAL CIRCUIT CAN BE LETHAL. ous external damage - such as broken
knobs, dents, damaged microphone or
2-2, INTRODUCTION radio case. Any damage NOT related to
shipping must be reported to General
This section provides installation data Aviation Electronics, Inc., 4141 King-
and recommendations for fixed, mobile, man Drive, Indianapolis, Ind., (46226),
or portable operation of the SynCom VHF Telephone (317) 546-1111, as soon as
transceiver, For complete technical possible.
specifications of the unit, refer to
Section 1-3 (Specifications) in this If the packing case shows damage, make
manual. a notation to that effect on the ex-
press receipt or freight bill. Report
2-3. EQUIPMENT SUPPLIED to the transportation company any dam-
age due to shipping, and file a claim
a. SynCom Communications Transceiver, promptly.

with hand microphone and hang-up
mounting clip.

m Copyright © 2007 Genave/NRC, Inc. All rights reserved.
Model: SynCom \

{

This manual is for educational purposes only.

The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages.

Use at your own risk. Unauthorized reproduction is prohibited.

2-7, INSTALLATION PLANNING

The unit has been pre~aligned at the
factory, and is programmed for the re~
ceive and transmit frequencies listed
on tag attached to the instrument. If
it is necessary to change these fre-
quencies, programming procedures con-
tained in Section 4 of the SynCom main-
tenance manual must be performed by a
licensed technician who shall be re-
sponsible for proper functioning of the
Station equipment,

If SynCom transceiver is equipped with
optional SA-1 (Subaudible-Tone Squelch
System), the subaudible—tone frequency
will be listed on tag attached to the
unit, and also on a label affixed to
inside of transceiver. If it becomes
necessary to readjust subaudible-tone
frequency from factory-set frequency,
refer to "Tone-Frequency Adjustment"
procedure in Section 4 of SynCom main-
tenance manual.

Before starting transceiver installa-
tion, determine desired mounting method
and logation: ascertain that required
AC or DC power is available; determine
location for antenna installation and
routing of co-ax cable to transceiver
rear-panel mounted antenna connector.

TO POWER SOURCE

NOTE: In choosing an operating lo-
cation for the instrument, remember
that F.C.C. Rules require that:
"Each transmitter shall be so in-
stalled and protected that it is
not accessible to or capable of op-
eration by persons other than those
duly authorized by the licensee,"
and, that "The operating position
must be under the control and su-
pervision of the licensee."

The transceiver may be
convenient position;
is NOT affected by the mounting posi-~
tion. However, the unit should NOT be
mounted directly above a hot-air regis~
ter or radiator.

mounted in any
unit performance

2-8. FIXED OR MOBILE INSTALLATION

1. Refer to Figure 2-1,
yoke has
ceiver,
For fixed

If mounting
been installed on trans-
remove yoke temporarily.
operation, yoke may be

repositioned on bottom side of unit
to function as a supporting stand.

teed warranted.
This manual is for educational parposbsl GUN Os Pd scey Typaicad.Instad lati-ony provided herein is not guaranteed or

Genave shall not be liable for any loss or damages

authorized reproduction is prohibited.

2-2

Model: SynCom

This manual is for educational purposes only.
Genave shall not be liable for any loss or damages.
Copyright © 2007 Genave/NRC,

For either fixed or mobile opera-
tion, the yoke may be secured in
the desired location (under dash or
shelf, on console or desk top, or
overhead, etc.) with appropriate
screws or bolts through two holes
provided in the mounting yoke.

Connect color-coded power leads,
terminated in the rear-—panel 15-pin
connector, to a power source. For
fixed operation, the source may be
a well-regulated, low-ripple AC
power supply, such as the Genave
Model PSI-10 or PSI-31. For mobile
operation, the source may be a bat-
tery or the vehicle's electrical
system. This transceiver is design-
ed to operate ONLY on a supply hav-
ing a negative ground.

Be SURE to connect RED power lead
to +13.75 volts, and BLACK lead to
ground (-13.75 volts). If it is
necessary to extend power leads,

use #14, or heavier, gauge insulat-
ed copper wire.

Internal
Speaker

Conn.

Accessory Connector
Standard Wiring

Mic. Clip’ - Grnd to
Chassis to Enable i
i

Tone Squelch

Hand-Mic.
Plug

Desk-Mic.
Plug

TAGs

P10L Mating
Conn.

Accessory Connector
Wired for Ext Speaker

The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Use at your own risk.

Unauthorized reproduction is prohibited.

If supply polarity is reversed ac-
cidentally, the unit will be inop-
erative. In this event, check wir-
ing polarity (RED to positive, and
BLACK to negative); then, check the
protective fuse located on trans-
ceiver main circuit board just be-
low rear-panel power connector. A
blown fuse should be replaced ONLY
with a 3AG 10-amp fuse.

The 15-pin receptacle has a jumper
connected between pins 2 and 10 to
activate the internal speaker in
the SynCom transceiver. If an ex-
ternal speaker is to be used, re-
move the jumper and connect speaker
leads between pins 2 and 7 of the
15-pin female receptacle. See Fig-
ure 2-2,

The SynCom transceiver is equipped
with a plug-in microphone’ recepta-
cle which allows use of either a
standard Genave hand microphone or

desk-style microphone interchange-
ably. Accessory connector and mi-
13.75 V

To
Antenna

Mic
Recept .~—

This manual is for educational purpose 1 GUY @heGedwe AGE eS SOK¥: CONE GOK bn MiGaea Wari ng not guaranteed or warranted.

Genave shall not be liable’ for any loss or damages.

Model: SynCom

Use at your own risk.
Copyright © 2007 Genave/NRC,

Inc.

Unauthorized reproduction is prohibited.
All rights reserved.

2-3

This manual is for educational purposes only.

The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.

crophone receptacle connections are de-
scribed in Sections 2-10 & 2-11 below.

NOTE: If standard hand microphone
is used with "“subaudible-tone op-
tion," the microphone-mounting clip
should be attached to the desired
mounting surface; then, clip MUST
BE electrically connected to SynCom
chassis ground in order to provide
"hang-up" receiver squelching.

5. After any optional or custom wiring
has been completed, replace trans-
ceiver in mounting yoke, and tight-
en both thumbscrews.

6. Connect microphone to transceiver,
and connect 15-pin receptacle to
mating rear-panel plug.

7. j%Imstall co-axial connector on an-
tenna cable as shown in Section
2-12, and connect antenna cable to
rear-panel mounted antenna recepta-
cle,

NOTE: The SynCom transceiver is de-
signed to match standard 50-ohm VHF
communications antennas. In the in-
terest of maximum efficiency, the
antenna system should exhibit low
VSWR.

2-9, PORTABLE OPERATION

1. The easiest method of portable op-
we eration with the SynCom is to uti-
lize a Genave PSI-21 Portable Power
Pack. The PSI-21 unit includes a

rechargeable battery and AC-powered .

charger.

2. Portable operation of the trans-
ceiver requires the same basic con~
siderations as fixed or mobile op-
erations; that is, connections to a
power source, antenna system, and
microphone.

2-10. ACCESSORY CONNESTOR - P101

a
The 15=-pin male plug mounted on rear
panel of the SynCom transceiver is des-
ignated as an "Accessory Connector,"
and mates with a 15-pin female connec-—

his manual is for educationa

tor to provide a comvenient method of
connecting power or optional accesso-
ries to the unit. Standard wiring of
the accessory connector utilizes five
pins, leaving ten pins available for
options or customized installation.
Figure 2-2 illustrates standard wiring
of the accessory connector and the mi-
crophone receptacle. The connections to
the accessory connector pins are de-
scribed below:

Pin 1 -— No Connection.

Pin 2 - High-level audio output from
receiver section of the trans-
ceiver; this audio is applied
either to the internal speaker
or to an external 4-ohm speak-
er, as determined by wiring of
the accessory connector. To use
the internal speaker, a jumper
is connected between pins 2 and
10 of the female connector; to
connect an external speaker,
the speaker leads are connected
between pins 2 and 7 of the 15-
pin female connector.

Pin 3 - No Connection.

Pin 4 - No Connection.

Pin 5 - No Connection.

Pin 6 - No Connection.

Pin 7 -— A chassis ground - particularly
intended for audio circuitry
such as an external speaker,
tone-squelch enable, etc.

Pin 8 ~- No Connection.

Pin 9 ~ No Connection.

Pin 10 - Input connection to the inter-
nal 4-ohm speaker in trans-

ceiver. This pin is normally
jumpered to pin 2.

Pin 11 —- No Connection.

Pin 12 - No Connection.

purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
, Genave shall not be liable for any loss or damages.

Use at your own risk. Unauthorized reproduction is prohibited.

2-4

Model: SynCom

Pin 13 - Chassis ground, and DC-input
negative connection. The fe-
male connector has a BLACK
lead, some four feet long,
attached to this pin for con-
nection to the DC-power input
source,

Pin 14 -— No Connection.

Pin 15 ~ DC-input voltage positive con-
nection. The female connector
has a RED lead, approx. four
feet in length, attached to
this pin for connection to the
DC-power sources

2-11. MICROPHONE RECEPTACLE

The microphone receptacle is a 5 con-
ductor jack (4 pins plus shell) mounted
on left-hand side of SynCom control
unit. Internal connections are factory-
made to this receptacle so that stan-
dard Genave hand microphones, or desk-
style microphones can be used inter~
changeably. The connections to the mi~
crophone receptacle pins are described
below:

Pin 1 — Microphone-audio connection to
input of transmitter~modulator
circuitry.

Pin 2 — Microphone push-to~talk switch
connection. When this switch is
closed, the keying relay is en-
ergized which applies power to
transmit circuitry and switches
antenna from receiver to trans—
mitter.

Pin 3 ~ Tone-squelich enable connection.
If transceiver is NOT equipped
with SA-1 Subaudible~Tone Op-
tion, this pin has no function;
however, if tone-squelch option
is used, this pin must be con-
nected to ground for the tone-
squelch circuitry to squelch
the receiver. Removing ground
from this pin disables the tone
squelch - allowing the frequen-
cy to be monitored.

The method of grounding pin 3
is dependent upon type micro-
phone being used: The hand mi-
crophone grounds this pin via
the mic. hanger and mic. mount-
ing clip; whereas, the desk-
style microphone grounds pin 3
through contacts on the Monitor
Switch. Refer to Figure 2-2.

Pin 4 =- No Connection.

GND ~-- Provides a chassis-ground con-
nection for microphone audio
and push-to-talk circuits.

2-12. ANTENNA CONNECTOR ASSEMBLY

For maximum efficiency, the antenna
should be fed with low-loss 50-ohm co-
axial cable. The loss per 100 feet at
144 MHz is shown in Table 2-1 for sev-
eral popular types of co-ax cable;

Table 2-1.

Cable Type Impedance dB Loss
RG58/A-AU 53-ohms 5.7 dB
RG58 Foam 50-ohms 4.1 dB
RG8/A~AU 52~ohms 2.5 dB
RG8 Foam 50-ohms 2.2 dB

2-12-1. Connector Assembly - General

The procedure for installing a PL-259
(83-1SP) antenna connector is dependent
upon type co-axial cable used - the PL-
259 is instalied directly on 0.405" OD
cable such as RG8/A, whereas, the plug
requires an adapter when used with the
0.195" OD cable such as RG58/A. The
procedures for both cable types are
given below, and shown in Figure 2-3.

2-12-2. RG8 Cable Procedure

1. Trim end of cable flush; remove vi-
nyl jacket from 1-1/8" of cable as
shown in Figure 2-3(1). Do NOT nick
braid.

2. Bare 3/4" of center conductor. Trim
braided shield 1/16" and tin. Slide
coupling ring on cable. See Figure

2-3 (2).
This manual is for educational purposes only. The accuracy and completeness of the 73,62). provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc. All rights reserved.

Model: SynCon 2-5

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.

RG5S Cable

RG8 Cable

COUPLING RING

SOLDER HOLE

=
| bed?

Figure 2-3. Connector Assembly.

3. Screw plug assembly on cable; _ sol-
der plug assembly to braid through
solder holes; solder center conduc~
tor to plug assembly center pin.

2~12~3. RG58 Cable Procedure _

Trim end of cable flush; remove vi-
nyl jacket from 21/32" of cable as
shown in Figure 2-3 (1). Do NOT
nick braid. Slide coupling ring and
adapter on cable.

Fan braid
over cable.

slightly and foid back
See Figure 2-3 (2).

Compress braid around cable, Figure
2-3 (3), and position adapter to
dimension given in Figure 2-3 (4).
Press braid over adapter sleeve and
trim to dimension shown.

Bare 1/2" of center conductor as
shown —— do NOT nick the conductor.
Pre-tin exposed center conductor.

Screw plug assembly onto adapter
sleeve, and solder braid to plug
assembly through solder holes. Next
solder center conductor to plug as-
sembly center pin.

Screw coupling ring on plug
bly.

assem~

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited
2 =H Copyright © 2007 Genave/NRC, Inc. All rights reserved. Mode’ : yntom

This manual is for educational purposes only. T a r 19) e of gan&prmation provided herein is not guaranteed or warranted.
Genave shall not be liable fo Oo or Tage, yo nérisk. Unauthorized reproduction is prohibited.
Co i 20 G Cx; pints reserved.

3-1. OPERATING CONTROLS
For reliability and operating conve-
nience, only essential operating con-

trols are installed on the unit's front

panel. The functions of these controls

are as follows:

1. Volume control/On-Off switch

2. Squelch control

3. Channel-Selector switch

4. Transmit-Indicator lamp

The push-to-talk button on the micro-

phone also functions as an operating

control, Unit operation is quite sim-

ple, as explained below:

3-2. OPERATING INSTRUCTIONS

1. Turn VOLUME (#1) and SQUELCH (#2)
controls fully counterclockwise.

2. Rotate CHANNEL SELECTOR (#3) to de-
sired operating frequency.

3. Rotate VOLUME control clockwise un-

til switch this turns ON

transceiver.

clicks;

NOTE:
SQUELCH control if
ing received,

If transceiver is equipped with the
SA-~1l subaudible-tone option, it is
necessary to deactivate tone-con-
trolled sausich by removing micro-
phone trom its hanger or, by de-
pressing MONITOR button on desk-
style microphone. This breaks "tone
enable” sround, and disables tone-~
squelch system.

Now, votate VOLUME control clock
wise to adjust receiver volume to
desired level.

Turn SQUELCH control
til background noise
pears.

clockwise un-
just disap-

Do NOT to adjust the

attempt
a signal is be-

To transmit, depress the microphone
pushbutton. If unit is equipped
with subaudible-tone system, it is
important to monitor channel before
transmit that it is
clear, The hand microphone circuit-
ry is designed in such manner that
receiver squeiching is deactivated
when microphone is removed from its

ng to insure

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Model: SynCom

Genave shall not be liable for any loss or damages.

Use at your own risk.
Copyright © 2007 Genave/NRC, Inc.

Unauthorized reproduction is prohibited.

3-1

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.

hanger; while the Gil desk-style
microphone is designed so that its
TRANSMIT button will not function
unless MONITOR switch has also been
depressed.

8. The TRANSMIT-INDICATOR lamp (#4)
will illuminate when transmitter is
operating; then, hold microphone 3
to 6 inches from your mouth, and
talk in a normal voice.

9. Release TRANSMIT pushbutton to lis-
ten.

NOTE: The squelch circuit, which is
adjusted by front-panel control,
quiets receiver in the absence of
an incoming signal on the assigned
operating frequency; however, any
station in your vicinity, operating
on this frequency, wil! be heard.
With the tone~squelch system, how-
ever, only transmitted signals car-
rying the proper subaudible tone
are heard, as explained previously.

3-3, LICENSING INFORMATION

Licensing requirements vary with the
service for which this unit will be
used; however, all services require the
station transmitter to be Licensed.

NOTE: While the seller or install-
ing agency may assist in filing the
license application, the responsi-
bility Jays solely with the pro-
spective licensee to assure that
transmitting equipment is covered
by a valid station license PRIOR TO
BEGINNING OPERATION.

Further, all transmitter adjustments or
tests during or coincident with the in-
stallation, servicing, or maintenance
of a radio station, which may affect
the proper operation of such station,
shall be made by or under the immediate
supervision and responsibility of a
person holding a first- or second-class
commercial radio operator license, ei-
ther radiotelephone or radiotelegraph,
who shall be responsible for the proper
functioning of the station equipment.

In addition to the STATION license, the
FCC Rules normaily require OPERATORs to
hold some type of authorization. The
minimum class of cperateor authorization
required for each specific classifica-
tion of station is set forth in the ap-
propriate FCC rule part. The most com-
mon authorization permitted by Rules
under which the SynCom is approved, is
the "restricted radiotelephone operator
permit (FCC Form 753).

The following technical information is
intended to aid SynCom users in com-
pleting the application for radio sta~
tion authorization. Oniy technical data
pertaining to the transceiver are shown
below; all other station particulars
must be furnished by the Licensee;

Transmitter Input 60 watts
Transmitter Output Powers 25 watts

Type of Units Transceiver
Type Acceptance/Model No: T7044 000
Frequency Range (MHz): 150 = 159.995

160.7 - 170.695
Frequency Tolerance: » 0005%
Emmission: 16F3
Approved under Rule Part 21, 74, 81,

Numbers 89, 91, 93

For additional information on filling
out the appropriate application forms,
consult the fF.C.C. instruction sheet
provided with that form. NOTE THAT SOME
FORMS MAY BE COMPLETED EITHER BY PRINT-
ING IN INK, CR BY TYPING; WHEREAS, TYP-
ING IS MANDATORY FOR CERTAIN F.C,C. AP=
PLICATION FORMS. Two of the more common
forms used to apply for a license for
the SynCom VHF transceiver are F.C.C.
forms 400 or 425, depending upon the
usage and/or geographic location of the
proposed station. To determine which
form is required, contact nearest FCC
Field Engineering Office as listed be-
low -- they will alsc supply the appro-
priate forms.

The procedures for obtaining necessary
licenses are found in the Federal Com-
munications Commission Rules and Regu-
lations. Any of these volumes may be
purchased from the Supt. of Documents,
U.S. Government Printing Office, Wash-
ington, D.C., 20402.

Model: SynCom

3-3-1. F.C.C. Rule Part Numbers

The services and the corresponding F.C.C. rule part numbers, under
which the SynCom can be used, are as follows:

Domestic Public Radio Services (Other than Maritime Mobile)
F.C.C. Rules & Regulations, Volume VII, Part 21
Domestic Public Land Mobile Radio Service
Rural. Radio Service

Experimental, Auxiliary, and Special Broadcast,
F.C.C. Rules & Regulations, Volume III, Part 74

Remote Pickup Stations

Stations on Land in the Maritime Services
F.C.C. Rules & Regulations, Volume IV, Part 81

Public Goast Station

Marine Utility Stations

Fixed Stations Associated with the Maritime Mobile
Service

Stations Operated in the Land Mobile Service for
Maritime Purposes

Public Safety Radio Services
F.C.C. Rules & Regulations, Volume V, Part 89

Local Government Radio Service
Police Radio Service

Fire Radio Service

Highway Maintenance Radio Service
Forestry~Conservation Radio Service
Special Emergency Radio Service

Industrial Radio Services ;
F.C.C. Rules & Regulations, Volume V, Part 91

Power Radio Service
Petroleum Radio Service
Forest Preducts Radio Service
Motion Picture Radio Service
Relay Press Radio Service
Special Industrial Radio Service
Business Radio Service
Manufacturers Radio Service
Telephone Maintenance Radio Service

Land Transportation Radio Services
F.C.C. Rules & Regulations, Volume V, Part 93
Motor Garrier Radio Service ;
Ratiroad Radio Service
Taxicab Radio Service
Automobile Emergency Radio Service

Model: SynCom 363

3-3-2.

This manual is for educational purposes only.

EF«GsCe

ALASKA, ANCHORAGE 99510

Copyri
Field Engineering Offices

G-63 U.S.P.S. and Courthouse Bldg.

Box 644, 4th and F Streets

CALIFORNIA, LONG BEACH
Room 501
3711 Long Beach Blvd.

CALIFORNIA, SAN DIEGO 92101
Fox Theatre Bldg.
1245 7th Ave.

CALIFORNIA, SAN FRANCISCO 94111
323-A Customhouse
555 Battery St.

COLORADO, DENVER 80202
Suite 2925, The Executive Tower
1405 Curtis St.

DISTRICT OF COLUMBIA, WASHINGTON
Room 411

1919 M St. NW.

FLORIDA, MIAMI 33130
Room 919
51 Southwest lst Ave.

FLORIDA, TAMPA 33607
ADP Building, Suite 601
1211 N. Westshore Bivd.

GEORGIA, ATLANTA 30309
440 Massell Bldg.
1365 Peachtree St. NE.

HAWAII, HONOLULU 96808
502 Federal Bldg.
Box 1021, 355 Merchant St.

ILLINOIS, CHICAGO 60604
3935 New Federal Bldg.
230 South Dearborn St.

LOUISIANA, NEW ORLEANS 70130
829 F. Edward Herbert Federal Bld
600 South St.

MARYLAND, BALTIMORE 21201
819 Federal Bidg.
31 Hopkins Plaza

MASSACHUSETTS, BOSTON 02109
1600 Customhouse

20554

The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages.

Use at your own risk. Unauthorized reproduction is prohibited.

MICHIGAN, DETROIT 48226
1054 Federal Bidg.
231 West LaFayette St.

MINNESOTA, ST. PAUL 55101
691 Federal Bldg. and U.S. Courthouse
316 North Robert St.

MISSOURL, KANSAS CITY 64106
1703 Federal Bldg.
601 East 12th St.

NEW YORK, BUFFALO 14202
1307 Federal Bldg

111 West Huron St.
NEW YORK, NEW YORK 10014
201 Varick St.

OHIO, CINCINNATI 45231
8620 Winton Road

OREGON, PORTLAND 97204
1782 Federal Office Bldg.
1220 Southwest 3d Ave.

PENNSYLVANIA, PHILADELPHIA 19106
James A. Byrne Federal Courthouse
601 Market St.

PENNSYLVANIA, MONROEVILLE 15146
(Pittsburgh Area)

William Penn Highway

PUERTO RICO, HATO REY 00918
747 Federal Bldg.

TEXAS, DALLAS 75242
13E7 Earle Cabell Federal Bldg.
1100 Commerce St.

TEXAS, HOUSTON 77002
5636 New Federal Office Bldg.
515 Rusk Ave.

VIRGINIA, NORFOLK 23502
Military Circle

870 North Military Highway

WASHINGTON, SEATTLE 8174
3256 Federal Blidg.

Ave

162. ahate, Bt ®ducational purposes only. The accuracy and Seipre eee d the Information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.

This manual is for educational purposes only. The accurac ee ANE of the information provided herein is not guaranteed or warranted.
Genave shall not be “SE ECTIO own risk. Unauthorized reproduction is prohibited.

sasreniaaee : ANUAL

4-1, INTRODUCTION Basically, the receiver is a dual con-

version superheterodyne, utilizing an
The frequency-synthesized VHF business-— output from the synthesizer for the lst
band transceiver is designed to trans- L.O. injection. An 8-pole monolithic
mit and receive 16F3 emissions in ei- crystal filter provides good selectiv-
ther of two frequency ranges: 150 - ity, while a single integrated circuit
159.995 MHz or 160.7 - 170.695 MHz. The performs limiting and detection func-
unit provides a typical power output of tions. In conjunction with the follow-
25 watts into a 52-ohm load. ing circuit description, refer to the

block diagram of Figure 4-1, and to the
transceiver synthesizer and main PC
board schematics in this Section.

Input nj RF Lat h-Pole git IF 4-Pole 5 oe IF |e] 2nd 2nd IF
Filter Ap [Mixer Filter Lae, Mixer Amp

= Low-Pasa| -&
Pilter |

o wi |
Pre -friver

This manual is for educational purposes only. The {Gui and Let information provided herein is not guaranteed or warranted.
Genave shall not be liable for any an age Lg sbrtOe ey “A Mhauthorized reproduction is prohibited.
se Bie © 2007 Poneieyane. Ine. All eae reserved.

Model: SynCom A~]

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction: is prohibited.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.

4-2, THEORY OF OPERATION - SYNTHESIZER

The frequency synthesizer generates ail
required frequencies for operation of
the transmitter and receiver sections
in the VHF-FM Business-Band Transceiv-
er. See block diagram, Figure 4-2.

4-2—-1, Reference Oscillator

Ic403 (4060A) is a dual-purpose oscil-
lator and divider. A portion of I1C403
is used as a 3.2 MHz crystal oscillator
and the remaining portion is a divider
which divides the signal down from 3.2
MHz to 25 kHz at pin 6.

Ic404 (74090) further divides the 25
kHz signal down to 5 kHz, which is used
as a reference input signal to phase-
detector IC401 pin l.

The 3.2 MHz crystal is temperature con-
trolled when the ambient temperature
drops below approximately 0°C. RT401,
R465, and Q41i1 control current flow
through resistors R463 and R464 which
are used to heat the 3.2 MHz crystal,
Y401.

4~2-2. Voltage-Controlled Oscillator

1c402 is a voltage-controlled oscilla-
tor (VCO) which produces the VHF signal
for the synthesizer. The VCO output is
amplified, buffered by Q405, Q406, and
Q407, and then applied to the receiver
and transmitter sections on the unit
main PC board.

4-2-3. Counters — Prescaler

The synthesizer consists of two groups
of counters: Group "A" (IC406B and IC-
415) and group "B" (10409, IC411, and
Ic413). "A" counter group controls the
length of time prescaler 1C405 divides
by ll. In operation, the prescaler IC-
405 divides the VCO output by 11 until
"A" counter reaches a "zero" state.
IC407 (12014) consists of a Zero detec-
tor which controls the modulus of pre-
scaler IC405 -- Logic HIGH (1) for #10,
and logic LOW (0) for #11.

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages.

Ic406 provides a divide by 2, which al-
lows prescaler to divide either by 20
or 21. Once "A" counter reaches a zero-
state, the state of "B" counter equals
B- A. The modulus of the prescaler
then changes to divide by 10, or in op-
eration, a divide by 20 at output of
IC406 pin 5, until the remaining count-
er B - A is decremented to zero.

4-2-4, Phase Detector

IC401 (4044) compares the 5 kHz refer-
ence (pin 1) with the output from the
counter chain (pin 3), and supplies a
variable voltage to varicap CR405 via
loop filter Q403 and Q404, Q401, Q402,
CR401, CR402, and CR403 comprise an
"out~of-lock" detector, which is used
to inhibit transmitter output, should
synthesizer fail to lock.

4—m2—5, Offset Programmer

The VCO frequency is increased by 10.7
MHz for “high=-band" transmit and "low-
band" receive functions, by utilizing
offset-programming chips IC410, IC412,
and 10414 (12021s). These chips provide
a digital means of increasing frequen-
cy. Offset-programmers IC410, IC412,
and 10414 consist of a logic implemen-
tation of a four-pole, two-position
switch controlled by the "enable-input"
from IC408 pin 3.

Each chip has two groups of inputs: One
group (pins 1, 13, 15, and 11) deter-
mining the transmission frequency, and
is programmable with either logic state
of the “enable" line, The other input
group (pins 10, 12, 14, and 2) deter-
mines the offset frequency (10.7 MHz),
and is controlled by the enable line --
logic "1" for NO offset, or logic "Oo"
for 10.7 MHz offset. In operation when
PTT line at pin 1 of IC408 is a logic
"0," the chip becomes a buffer gate
that follows the clock input at pin 10.
@ line (pin 3 of IC408) produces a con-
stant logic "1" which DOES NOT enable
offset. A logic "1" on PIT line at pin
1 of [C408 turns IC408 into a flip-flop
and divides by two both Q and Q outputs
(pins 5 and 3 respectively).

Use at your own risk. Unauthorized reproduction is prohibited.

4-2

Model: SynCom

This manual is for educational purposes only.

Genave shall not be liable for any loss or damages.

The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Use at your own risk. Unauthorized reproduction is prohibited.

This switching logic allows 10.7 MHz
frequency information "hard-wired" at
input pins 10, 12, 14, and 2 (1C410,
Ic412, and IC414) to be enabled into

programmable counter chips.

Transistor Q410 is used to invert logic
at PTT (key) line input to pin 1 of
Ic408 (12020), when transceiver is used
on the high-band, 160.7 to 170.695 MHz.

4-2-6, Synthesizer Power Supply

The synthesizer receives a 13.75-volt
DC input from the transceiver main PC
board. The 13.75-volt input is applied
directly to the crystal-heater trans-
istor Q411 through the crystal—heater
resistors R463 and R464,

The incoming 13.75 volts is applied
through R456 to a 10-volt Zener diode,
CR408, This regulated 10-volt supply is

then applied to C-MOS reference oscil-
lator/divider chips 1C403 and IC404.

Four 3-terminal solid-state regulators
supply +5 volts to the various inte-
grated circuit chips on the synthesizer
board. Separate regulators are used for
the various 5-volt supplies to provide
isolation and decoupling between the
stages, and thus eliminate undesirable
interaction and coupling between syn-
thesizer stages.

Regulator 10420 (78LO5CP) supplies 5 V
to VCO 1¢402; 1C419 (78LO5CP) supplies
5 V to phase detector IC401 (MC4044);
IC418 (MC78HO5P) supplies 5 V to the
prescaler IC405; as well as to IC415
and 10406; while IC417 (MC78HO5P) sup-
plies 5 V to remainder of synthesizer.

4-2-7, Reserved

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages.

Use at your own risk. Unauthorized reproduction is prohibited.

Model: SynCom

4-3

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Use at your own risk.

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The accuracy and completeness of the information provided herein is not guaranteed or warranted.
loss or damages.

The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for a

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Genave shall not be liable for any loss or damages.

vrOy
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S666S!-05!

This manual is for educational purposes only.
This manual is for educational purposes only.

SynCom

Model

4-4

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages.

Use at your own risk. Unauthorized reproduction is prohibited.

4-3, THEORY OF OPERATION - RECEIVER
4-3-1, Low-Pass Filter

From antenna connector J201, the re-
ceived signal is applied to a low-pass
filter comprised of C232, L214, and
C231. After the signal leaves the low—
pass filter, it is routed to pin 15 of
T/R relay K301. In the "receive" mode,
pin 14 of the T/R relay feeds the in-
coming signal to the receiver input
filter.

4—3-2. Input Filter and RF Amplifier

The receiver-input filter consists of a
double-tuned circuit, L101, C102, L102,
and C103, with the output tap on L102
coupled to RF amplifier Q101. The RF
amplifier output is applied to another
double-tuned circuit comprised of L103,
C106, C109, and L104; then, the tap on
L104 is coupled to a second RF ampli-
fier, Q102. The output of Q102 is ap-
plied to a double — tuned circuit con-
sisting of L105, Cll1, L106, and C114.
The output tap on L106 routes the am-
plified signal to a dual~gate FET first
mixer.

NOTE: The values of double-tuned
circuit coupling capacitors, C158,
C108, and Cil2, are selected to
provide a 6 MHz bandwidth.

4-3-3, First Mixer Injection

The injection siganl from the synthe-
sizer is connected to gate 2 of dual-
gate ist mixer Q103. To receive between
150.0 and 159.995 MHz, the injection
frequency is 10.7 MHz ABOVE the desired
"receive frequency,’ while to receive
frequencies between 160.7 and 170.695
MHz, the injection frequency is 10.7
MHz BELOW the desired "receive" fre-
quency.

4—~3-4, First Mixer and First IF Amp.

The 10.7 MHz difference signal produced
in the first mixer is coupled by T101
to a 4—pole monolithic crystal filter
consisting of FLIOL and FLI02. The

coupled by T102 to first stage Q104 of
the first IF amplifier. The output of
Qi04 is coupled by T103 to another 4-
pole monolithic crystal filter con-
sisting of FL103 and FLIO4. The output
of the filter is then transformer cou-
pled by T104 to the second stage, Q105,
of the first IF amplifier.

4~3-5. Second Mixer/Autodyne Converter

The output of Q105 is transformer cou-~
pled by T105 to the second mixer, Q106,
which operates as an autodyne converter
with crystal Y123 oscillating at 10.245
MHz to produce a second IF of 455 kHz.

4~3~6, Second IF Amplifier

Transformer T106 applies the resultant
455 kHz difference frequency to ICl10l,
which functions as a high-gain 455 kHz
IF amplifier.

4-3-7, Limiter, Detector, and Squeich

The output of IC101 is coupled by T107
to IC102 pins 1 and 2 ~ IC102 performs
the limiting and detection functions in
the receiver. C130 sets the de-emphasis
level in the detection circuitry, while
T108, R121, and C131 form the quadra-~
ture detector. Detected audio on pin 8
of IC102 is fed through C132 and R122
to the audio amplification circuits via
pin 14 on IC102,. At the same time, de-
tected audio from pin 8 is also applied
to a noise amplifier consisting of Q107
and its associated circuitry. The am-
plfied noise from Q107 is fed to the

voltage - doubling detectors CR103 and
CR104. The detected noise then charges
C137 and biases the base of 0108. The
Squelch control, R504, determines the
authority of the detected-noise level
on base of Q108 ~ as Q108 turns ON, it
pulls pin 6 of IC103 to ground, This
action turns IC103 OFF, and completely
silences the receiver,

4-3-8, Audio Amplifier

Volume control R505 sets the level of
audio fed to audio amplifier Tc103.
R132 and C143 perform the frequency-

ok put.of saat MR ded Gh ses is,. Fé ansform CX wictenesk SRONSE, Shaping..af,. fhe audio, amplifier,

Genave shall not be liable for any loss or ander

Use at your own risk. Unauthorized reproduction is prohibited.

Model: SynCom

4-5

while C145, ©¢146, and C148 provide plifier. This Class C stage increases

feedback to various stages within IC103.
Audio output from pin 12 of Ic103 is
applied through C150 to the speaker.

4-4, THEORY OF OPERATION - TRANSMITTER
4-4-1. Modulator Audio Amplifier

The modulator audio amplifier in the
unit is built around a single integrat-
ed circuit, IC301. This IC is a dual
operational amplifier, and is shown on
the schematic as IC301A and IC301B.
Audio output of the ceramic microphone
is amplified by IC301A - a 6 dB per
octave rising characteristic is given
to the audio frequencies by loading the
1500 pF microphone capacitance with
bias resistor R302. IC301 also provides
the clipping function required for lim-
iting modulation by saturating symmet—
rically against supply voltage and
ground, Regulated-supply voltage for
the modulator is obtained by applying
13.75 VDC primary power through R310
and across 6.8-volt zener diode CR301.

Output from IC301A is applied to IC301B
which acts as an active, 2-pole, Cheby-
shev low-pass filter with a cutoff fre-
quency of 3 kHz. R308 and C312 add a
third pole to the filter, which gives
the required -18 dB per octave rolloff
above 3 kHz. R309 controls audio level
applied to modulator varactor diode
CR406. C313 provides an audio return
for R309.

4-4—2, Buffer Amplifiers

RF output from the synthesizer is am-
plified by Q201 and Q202. Transistor
Q201 also disables the transmitter in
case the synthesizer "unlocks." Should
the synthesizer go out of a phase-
locked condition, Q408 is turned on by
the lock indicator and pulls the base
of Q201 to ground, thus disabling the
transmitter.

4eae4—3, REF Predriver

The 150 to 170.695 MHz signal from fi-
nal buffer Q202 is applied to the base

of Q20dnwhich: t@cé hei firsé& RE. POWER raaMana compleths approximated %o.9aed n@Od ESnDGwaranteed or warranted.

Genave shall not be liable for any loss or damages.
Copyright © 2007 Genave/NRC, Inc.

4-6

Use at your own risk.

the RF signal from 50 milliwatts to ap-
proximately 500 milliwatts at its out-
put. This output is coupled to the fol-
lowing driver stage by a filter network
formed by L204, C210, C235, and L203.
This circuit provides both filtering of
any undesired spurious responses, and
impedance matching into driver stage.
4-4-4, RF Driver

Q204 and associated circuitry function
as a Class C RF Driver.

L205, C213, L206, C216, and C217 forma
frequency - selective matching network,
which also reduces any undesired out-
puts from driver stage.

4-4-5, Final Power Amplifier

Q205 functions as the final power am-
plifier, and develops 25-watts of RF-
output power when full drive is applied
from Q204, C221, C225, and L208 com-
prise a resonant matching network which
matches the output of Q205 to the 52-
ohm antenna impedance. The remainder
of components up to output connector
J201 form an eliptic~-function filter
which reduces level of all spurious
outputs to less than -13 dBm.

4-4-6. Power Supply

Power to operate unit is obtained from
the 13.75 VDC external power source
through input connector J101, F301, and
SW510. The 13 VDC line supplies power
to operate relay K301, audio output,
synthesizer, and 9.7-volt regulator.

The synthesizer VCO, reference oscilla-
tor, and counters are all operated from
5-volt IC regulators to ensure stabili-
ty and isolation between sections of
the synthesizer, and to virtually elim-
inate "close-in" spurious responses.

Voltages for receiver RF, mixer, and IF
stages are obtained from a zener-diode
stabilized pass-transistor regulator,
which consists of R131, R135, CRIO7,
and Q109. The output of this regulator

Unauthorized reproduction is prohibited.
All rights reserved.

Model: SynCom

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages.

Use at your own risk. Unauthorized reproduction is prohibited.

NOTE: To quiet receiver audio during
transmission, the microphone push-to-
talk switch also grounds pin 6 of au-
dio amplifier IC103 through CR105.

4-5, DISASSEMBLY

4-5-1, Top and Bottom Cover Removal

Prior to performing any service work on
the instrument, the plastic top cover
must be removed. The bottom cover need
not be removed, unless it is necessary
to gain access to bottom-side of main
PC board, To remove either cover, re-
move two 6/32 x 3/8" screws (D)securing
each side of cover to transceiver chas-
sis; then, slide cover back and lift it
off unit.

4m5~2. Access to Synthesizer Board

With unit top cover removed, the compo-
nent side of synthesizer board is ac-
cessible for waveform measurements or
frequency adjustment. Note that shield
covers are tack~-soldered in place.

To gain access to bottom-side of syn-
thesizer board, remove four screws se-
curing PC board to shield (see Figure
4-3); then, loosen pivot screws (B) one
or two turns. Pivot board forward as
required.

4-5-3. Access to Main PC Board

To reach component side of main board
for alignment purposes, remove the two
screws (C) securing shield to heatsink,
and remove two #4 x 1/4" sheet - metal
(A) serews. Loosen pivot screws (B)
one or two turns; now pivot shield and
synthesizer board forward as required.

NOTE: Synthesizer board and shield
may be pivoted forward as one unit.
It is NOT necessary to remove the
screws holding PC board to shield
unless access to bottom of PC board
is required,

4-5-4, Control Head Removal

In order to ebtain access to SA-1 Tone

Board or the Programming Board, both
located in transceiver control head,
remove two #8~-32 oval-head screws from
each side of head; then, pull head for-
ward and remove from front of trans-
ceiver chassis.

The SA-1 tone board mounts on the pro~
gramming board by means of two plugs --
P501 and P502. To remove SA-1 from con-
trol head, carefully grasp tone board
by its ends, and gently but firmly rock
board while pulling it up and off mat-
ing pins on programming board. Normally
the 4-pin receptacle will disengage
first. To reinstall SA-i1, reverse the
removal procedure.

Access to the programming switches is
obtained simply by removing the SA-l1
board (if used); however, if the sim-
plex/duplex jumpers must be changed,
the programming board must be removed
from control head. To remove program-
ming board, loosen three screws which
secure mounting clips (Figure 4-4); now
slide clips in until small control pan-
el is released. Pull panel forward from
control housing. Slide squelch, volume,
and freq .-selector knobs off their
shafts, and remove four Phillips—head,
self-tapping screws which secure pro-
gramming board to control panei. The
board can now be lifted off panel to
facilitate installation of jumpers.

4-6, RESERVED

SHIELD Synthesizer

Plastic
Case

Figure 4-3.

Disassembly

Model: SynCom 4=7

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.

4-7, CHANNEL PROGRAMMING - GENERAL

The SynCom transceiver may be internal-
ly programmed for operation on a maxi-
mum of two SIMPLEX channels, or one
SEMI~DUPLEX channel, by changing two
jumpers on programming board mounted
in control head. Refer to Figure 4-4
for location of jumpers.

Frequency programming is accomplished
by means of six 10-position, rotary BCD
switches and two 2-position SPDT slide
switches mounted on programming board.
Refer to Figure 4-4 for location of
programming switches on PC board. Ac-
cess to Simplex/Duplex jumpers and the
Programming switches is obtained by re-
moving control head from transceiver as
given in Section 4-5 of this manual.

As indicated previously, the transceiv-
er is capable of operating on either
frequency range: 150.0 - 159.995 MHz,
or 160.7 = 170.695 MHz. The SynCom MUST
BE programmed so that all transmit/re-
ceive frequencies, either simplex or
semi~duplex, are in the same frequency
range. The desired frequency range is
selected by a jumper arrangement on the

SW504
1 MHz

sw505
1 MHz

Synthesizer PC board. See Figure 4-5
for location of frequency-range jumpers
on PC board. To gain access to synthe-
sizer board, remove instrument top cov-
er; then, follow instructions given in
Section 4-5 of this manual.

NOTE: The SynCom transceiver is
shipped from factory with program-
ming jumpers installed to provide
SIMPLEX operation, with synthesizer
board jumpered to provide operation
on the "low-band" (150 - 159.995
MHz), and the receiver input filter
adjusted for 150 - 156 MHz.

To adjust frequency switches to select
a desired frequency for channei 1, for
example 154.315 MHz, proceed as fol-
lows: The 100~MHz digit (1) and the 10-
MHz digit (5) are preset, thus no se-
lection is required for these digits.
Use a slotted alignment tool and rotate
SW504 (i~MHz digit) so that its arrow
indicator points to "4"; then, use the

slotted tocol to rotate SW506 (100—kHz)
so it indicates "3", Next, use slotted
tool to rotate SW508 (10-kHz digit) so
it indicates "1." Now slide switch SW-
502 to its 5—kHz position. The switches
are now set to 154.315 MHz.

P502

1@€@¢¢¢ 6 6|

NOTE: Top switches are CHANNEL 1 for SIMPLEX, or TRANSMIT for SEMI=DUPLEX.

Bottom switches are CHANNEL 2 for SIMPLEX, or RECEIVE for SEMI-DUPLEX.

For SIMPLEX, use solid-line jumpers X and Y.

7 eon oncemewmnns . = ®

For SEMI-DUPLEX, remove jumpers X and Y¥; add dotted-iine jumbérs A and B.

Lexy” “Long Clip

Figure 4-4. Programming Board, Component Side.

This manual is for eduGational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages.

Use at your own risk. Unauthorized reproduction is prohibited.

4u§

Model: SynCom

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.

Eve 2007 Genave/NRC, Inc.
>

NOTE: To program SA-1 TONE SQUELCH, “See
Section 4-11 in this manual. 7.

1.
2.
For “Llow-band," use jumper Js; omit 1K resistor |
and jumper H (shown dotted). 5.
For “high-band," add jumper H and 1K resistor;
remove jumper J.
Figure 4-5, Freq. Range Jumpers-
Synthesizer Board.
; 4.
4-7-1, Programming Simplex Frequencies
(Low~Band)

l, First, determine frequency(ies) to
be used.

2. Gain access to large compartment on 5.
synthesizer board by following pro-
cedure in Section 4-5.

3. Determine that synthesizer is set Bo

for "low-band" operation; that is,
jumper J is installed, but 1K res-
istor and jumper H are omitted. See
Figure 4—5.

4. Remove control head from transceiv-
er as described in Section 4-5. See
that "simplex" jumpers X and Y are a
installed from channel switch to PC
board and jumpers A and B are omit-
ted as shown in Figure 4-4.

5. Now set SW504, SW506, SW508, and 8.
SW502 for the i MHz, 100 kHz, 10
kHz, and 5 kHz digits respectively,
of the frequency to be designated
as channel 1, as detailed in 4-7 9.
above. For SA~1 info, see Sec. 4-11.

6. Repeat step 5, using SW505, SW507,
SW509, and SW503 for the frequency 10.
to be designated as channel 2, if
used.

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Re-assemble transceiver, and check
operation on programmed frequen-
cies.

2. Programming Simplex Frequencies
(High-Band)

Determine frequency(ies) to be pro-
grammed into transceiver.

Gain access to large compartment on
synthesizer board by following pro-
cedure in Section 4-5.

Determine that synthesizer is set
for "high-band" operation; that is,
jumper H and the 1K resistor are
installed, but jumper J is omitted.
See Figure 4-5,

Remove control head from transceiv-
er as described in Section 4-5. See
that "simplex" jumpers X and Y are
installed from channel switch to PC
board and jumpers A and B are omit-
ted as shown in Figure 4-4,

Now subtract 10.7 MHz from each of
frequencies determined in step 1
above.

Using one of frequencies obtained
in step 5, set SW504, SW506, SW508,
and SW502 for the 1 MHz, 100 kHz,
10 kHz, and 5 kHz digits respec
tively, of the frequency to be des-
ignated as channel 1, as given in
Section 4~7 above.

Repeat step 6, using SW505, SW507,
SW509, and SW503 for the remaining
frequency determined in step 5, if
used. This is channel 2.

Realign receiver input filter to
cover frequency range required by
frequency(ies) in step 1 above.

If unit is equipped with SA~1 tone
squelch, see Sec. 4-11 for program-
ming information.

Re-assemble transceiver, and check
operation on programmed frequen-
cies.

Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.

Model: SynCom

4-9

4-7-3, Programming Semi-Duplex Freqs. 2. Gain access to large compartment on
(Low~Band) synthesizer board by following pro-

cedure in Section 4—5.

1, Determine transmit and receive fre-

quencies to be programmed into the 3. Determine that synthesizer is set
transceiver. for “high-band" operation; that is,
jumper H and the IK resistor are
2. Gain access to large compartment on installed, but jumper J is omitted.

synthesizer board by following pro-

See Figure 4-5,

cedure in Section 4-5,

4, Remove control head from transceiv-
er as described in Section 4-5. See
that "semi-duplex" jumpers A and B
are installed, but that jumpers X
and Y from channel switch to PC

board are removed. Refer to Figure
4-4,

3. Determine that synthesizer is set
for "low-band" operation; that is,
jumper J is installed, but 1K res-
istor and jumper H are omitted. See
Figure 4-5,

4. Remove control head from transceiv-
er as described in Section 4-5. See 5. Now, subtract 10.7 MHz from the
that “semi-duplex" jumpers A and B "transmit" frequency, and also from
are installed, but that jumpers X the "receive" frequency, found in
and Y from channel switch to PC step 1 above.
board are removed, Refer to Figure
fad, 6. Using "transmit" frequency obtained
in step 5, set SW504, SW506, SW508,

5. Using "transmit" frequency found in and SW502 for the 1 MHz, 100 kHz,
step 1 above, set SW504, SW506, SW- 10 kHz, and 5 kHz digits respec-
508, and SW502 for the 1 MHz, 100 tively, as given in Section 4-7
kHz, 10 kHz, and 5 kHz digits re- above.
spectively, as detailed in Section
4-7 above. NOTE: When transceiver is program-

med for semi-duplex operation, the
front-panel channel-selector switch
is disabled.

NOTE: When transceiver is program-
med for semi-duplex operation, the
front-panel channel=-selector switch

is disabled. 7. Using "receive" frequency obtained

in step 5, set SW505, SW507, SW509,
and SW503 for the 1 MHz, 100 MHz,
10 kHz, and 5 kHz digits, respec-
tively, as given in Section 4-7,

6. Using "receive" frequency found in
step ] above, set SW505, SW507, SW-
509, and SW503 for the 1 MHz, 100

kHz, 10 kHz, and 5 kHz digits, re-
spectively, as detailed in Section 8. Realign receiver input filter to
a=] » cover frequency range required by

"receive" frequency in step l.

7. Re-assemble transceiver, and check

operation on programmed frequency. 9. Re-assemble transceiver, and check
operation on frequencies program-
med into transceiver.

4-7-4, Programming Semi-Duplex Freqs.
(High~Band)

1, Determine transmit and receive fre-
quencies to be programmed into. the
transceiver.

4-10 Model: SynCom

This manual is for educational purposes only.

Genave shall not be liable for any loss or damages.

4-8. SYNTHESIZER ADJUSTMENT

Remove top cover from instrument, and
refer to Synthesizer Component Layout
for adjustment locations,

i. Disconnect plugs P403 and P404 from
mating jacks at right-hand side of
synthesizer PC board.

2. Connect frequency counter to either
jack, 3403 or J404, on synthesizer
board.

3, Set frequency-selector switches to
150.000 MHz, and turn unit ON.

4, Depress push-to-talk button on mi-
cxrophone, and adjust trimmer C441
on synthesizer board for a reading
of 150.000 MHz if unit is program-
med for "low-band" operation or, a
reading of 160.700 MHz if unit is
programmed for "high-band" use.

CAUTION: BE SURE frequency is with-
in +.0005% of 150.000 or 160.700
MHz, aS applicable.

5. Disconnect frequency counter from
transceiver, and reconnect P403 and
P404 to synthesizer jacks.

NOTE: This is the only adjustment
required for proper frequency oper-
ation of synthesizer.

4-9, RECEIVER ALIGNMENT

and two sheet-—
outlined in Dis-

Remove two screws (C)

metal screws (A) as

assembly Procedure (Section 4-5) in

this manual; then, pivot shield and

synthesizer PC board forward to gain

access to receiver adjustments.

4-9-1, RF & Input Filter Alignment

1. With transceiver OFF, connect RF-
output cable of sweep generator to
transceiver antenna connector J201.
Connect a high-impedance detector
(Figure 4-6) to gate 1 of lst mixer
Q103; then, connect detector output
to oscilloscope vertical input.

The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Use at your own risk.

Unauthorized reproduction is prohibited.

39pf
‘ol. TO SCOPE
100K VERT. tNPUT

INPUT

Figure 4-6. High-Impedance Detector

Remove mixer injection signal by
disconnecting P404 from J404 on the
synthesizer board.

3. Set sweep generator to sweep a 6 MHz

band which includes the "receive"
frequencies on which the transceiver
is to be used. Use an RF-generator
to produce the necessary markers.

NOTE: Factory-setting of the input
filter is 150 to 156 MHz.

switch ON.

attenuator to
position; then,
RF-output level
overdriving

Turn transceiver power
Set scope vertical
its most sensitive
set sweep generator
low enough to prevent

transceiver RF amplifier.

Adjust C102, C103, C106, C109, Clil
and C114 to give a 6-MHz bandpass
similar to that shown in Figure 4-7

below.
Turn unit power switch OFF, discon-
nect test equipment, and reconnect

P404 to J404 on synthesizer board.

6 MHz

Figure 4-7. Input-Filter Response

4-9-2. 10.7 MHz & 455 kHz IF Alignment

ile

Connect a high-impedance detector
(Figure 4-6) to drain of FET ampli-
fier Q105; then, connect detector
output to scope vertical input. Set

scope vertical attenuator to its

‘ A e .
This manual is for educational purposes only. The accuracy and completeness of the MOStar SCRSLEAVE -POSLEION anteca or warranted.

Genave shall not be liable for any loss or damages.

Use at your own risk.

Model: SynCom

Unauthorized reproduction is prohibited.
All rights reserved.

4-11

2. The connection point for the sweep- 6. Apply a 10.7 MHz CW signal by ei-
input signal depends upon frequency ther of the following methods:
range of sweep generator being
used: If generator covers 10.7 MHz, (1) Inject an accurate 10.7 MHz CW
the sweep signal can be applied signal into gate 1 of mixer Q103
through a 39 pF capacitor to gate l through a 39 pF capacitor. Remove
of mixer Q103; however if generator mixer injection signal by discon-
covers operating frequency of the necting P404 from J404 on synthe-
transceiver, the sweep signal can sizer.
be applied directly to antenna in-
put connector J201. Turn transceiv- (2) Connect a sig. generator, set
er power switch ON. to desired "receive" frequency, to
antenna connector J201, and connect
NOTE: During alignment of the mono- a frequency counter to pin 1 of IF
lithic crystal filters, keep sweep- Ic101. Turn instrument power switch
Signal input level low enough to ON, and increase generator output
prevent overdriving the detector -- until 2nd IF is read on counter.
signal level at the detector should "Fine-tune" signal generator until
be approximately 10-20 mV. Set 2nd-IF frequency reads 455 kHz.
generator sweep width for approxi--
mately 25 kHz at a sweep rate of 7. Disconnect RF generator from trans-
not more than 40 Hz. ceiver, and with transceiver power
switch ON, adjust volume control
3. Adjust T101, T102, T103, T104, and for a 0.5-volt noise level on the
T105 for a bandpass response simi- AC voltmeter.
lar to that shown below. The ripple
should not exceed 2 dB, and in most 8. Reconnect signal generator to the
cases will be 1 dB or less. transceiver, and increase unmodu~
lated signal from signal generator
until noise level drops to 0.25 VAC

2 dB v on voltmeter.

Max, Ripple
7 9. Now, adjust T106 and T107, in that

order, for maximum quieting as in-
dicated on the AC voltmeter.
Decrease RF input, as necessary, to
maintain a usable reading on AC
voltmeter during alignment. Repeat
step 9 until no further quieting is

Figure 4-8. IF Response obtained.

4, Turn transceiver power OFF, and 10. Turn transceiver power OFF and dis-
disconnect sweep generator, detec- connect AC voltmeter. Now, connect
tor, and scope. an oscilloscope across speaker ter-

minals, and turn transceiver power
NOTE: After the 10.7 MHz crystal switch ON.”
filters have been properly aligned
using a swept signal, DO NOT change 11. FM modulate signal generator with a
adjustments of T101 through 1105. 1-kHz tone at +5 kHz deviation. Ad-
just generator RF output to a 10-

5. Connect an AC voltmeter across unit microvolt level and adjust scope-
speaker terminals; turn squelch and input sensitivity to cover about
volume controls fully counterclock- 3/4 of scope screen vertically with
WwiSe. the i-kHz tone.

4-12 Model: SynCom

12. Adjust T108 for maximum amplitude volume control at midrange, and ad-
of the 1-kHz tone on scope screen. just squelch control fully counter-
clockwise; then, set squelch clock-
13. Turn transceiver power switch OFF, wise until receiver background
and disconnect all test equipment noise just disappears.
from unit. If method #1 used for
alignment, reconnect P404 on syn- 4. Increase setting of signal genera-
thesizer board. tor RF attenuator until the squelch

just fully opens. The RF attenuator

4-9-3, RF Input for 20-dB Quieting should show -121 dBm (0.2 uv) or

better.
1. Connect FM signal generator to an-
tenna connector J201, and connect 4-9-5. ‘Minimize 1/2 IF Response
an AC voltmeter across unit speaker
terminals. Turn transceiver power The following -steps minimize receiver
switch ON. response to signals which differ from
the selected frequency by 5.35 MHz (1/2
2. Turn signal—-generator modulation IF):
OFF, and set generator RF attenu-
ator for minimum output. Set gener- 1. Set receiver to desired operating
ator and transceiver to desired op- frequency; then set FM signal gen-
erating frequency. erator 5.35 MHz ABOVE the receiver
frequency, with an output of 400 to
3. Adjust transceiver volume control 500 uV, modulated with a 1 kHz tone
so that receiver background noise at +3 kHz deviation.

indicates -10 dB on AC voltmeter.
2. Adjust trimmer C114 (input of Ist

4, Slowly increase setting of IM sig- mixer) for a null (minimum received
nal generator RF attenuator, until signal). The receiver should now
AC VIVM indicates -30 dB. Note RF require MORE THAN 500 uV input for
level shown on signal-generator at- a 12 dB SINAD.
tenuator. This is the RF input re-
quired to produce 20 dB receiver 3. Check receiver sensitivity at all
quieting; an input of -112 dBm programmed "receive" frequencies to
(0.45 uv) will quiet receiver 20 assure that receiver passband is
dB. Check additional frequency(ies) still within specifications.

as desired.

4-9-6, Audio-Output Power

1. Set FM signal generator on desired

4-9-4, Squelch Operation

1. Set signal generator to desired "receive" frequency, and modulate
"receive" frequency, and modulate generator with a 1-kHz tone at +5
generator with a 1 kHz tone at +5 kHz deviation. Set RF attenuator in
kHz deviation. Set RF attenuator to the vicinity of 5 uV.

minimum RF output.
2. Turn volume control fully clock-

2. Turn squelch control fully clock- wise. The AC VTIVM should indicate
wise. Receiver audio control should not less than 4 volts (4 watts).
be set for maximum volume. Receiver
is fully squelched, and should be 3. Modulate generator with 500~Hz tone
completely silent. at +5 kHz deviation, and note that
AC VIVM indicates at least 4 volts
3. Reduce DC-input voltage to approxi- with transceiver volume control
mately 11 volts, and note that re- fully clockwise.

ceiver is still fully squelched.
This Return DC input to | 13.73. VDC, PES icecnatt “of t fodulate Siena, generator, with es
Genave shall not be liable for any loss or damages. Use at your KAZ stone at 45 RAS deviatrons: Again

Model: SynCom 4-13

the AC VIVM should indicate at 2. Preset deviation potentiometer
least 4 volts at maximum setting of (R309) to its lowest setting (po-
the transceiver volume control. tentiometer rotated toward receiver

side of mainboard).
5. Turn OFF transceiver power switch,

and disconnect signal generator and 3. Connect unit to a 13.75-volt DC
AC VIVM from transceiver. power source.

4-10. TRANSMITTER ALIGNMENT 4-10-3. Frequency and Power Alignment

4-10-1. Equipment Required 1. Before starting to align transmit-

ter, refer to programming instruc-

To properly align the T-7044000 trans- tions in Section 4-7 of this manual

mitter, the following test equipment, and program transceiver to operate

or its equivalent, is required: on desired frequency(ies).

a) Power meter, 35 watts @ 158 MHz; or, NOTE: The signal peak-voltage mea-
Relative Output Indicating Device suremnets in the following steps of
(Figure 4-9) with 50-ohm dummy load. this section are made with a VTYM

and DC probe. Key transmitter only

b) Frequency counter, DC to 165 MHz; or when adjustments are being made.
other accurate frequency measuring
device. 2. Connect DC probe to emitter of Q-

203, key transmitter, and adjust

c) Deviation meter, to read at least C206 for a peak reading at the op-

+5 kHz. erating frequency. Adjust VIVM at-—

tenuator for an "onscale" reading.
d) Power supply, filtered, 13.75 VDC at

8 amps minimum. 3. If the relative output indicating
device of Figure 4-9 is used, con-

e) VIVM ~ any accurate instrument. nect VIVM DC probe to the relative
output terminal labeled "To VTVM."

f) Audio generator, to supply 1700 Hz. Otherwise, observe wattmeter or

other relative output indicator.

g) Oscilloscope, DC to 5 MHz.
4. Preset C217 by tightening its ad-

4-10-2. Preparation for Alignment justment screw down firmly; then,
backing it off 1/2 turn.

1. Attach a 50-ohm dummy load to the

transceiver RF-output connector 5. Key transmitter and adjust C213,
through a power meter or relative C217, C221, C225, C210, C235, and
output indicating device (Figure C206 for maximum relative output
4~9), indication on the operating fre-
quency. Repeat this step as neces-
sary.
r 4-10-4. Power Measurement Procedure
[ I ' [fos om on anaes Reiaait
Sark i i 1. Select a channel with the channel~
] selector knob.
47K
ei IN34 2
E é 7] TO FREQ. COUNTER 2. Key transmitter and note power out-
< 100 K OR DEVIATION
4 {] METER put on selected channel. The power
a + should be 20 watts, or more, from

2
iow 150.0 to 159.995 MHz, ora ee
This manual is for educational purposes onl The accuracy and completeness OF ne 15, .watt Srovi from... 46 is Oe. 1 diet LO ».69 eed:
purp y- 4 Pp Bp. g
Genave shall not be liable for any loss or damages. Use at y] wn risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc. mn rights reserved.

Figure 4-9. Relative Output Indicator
pe Model: SynCom

This manual is for educational purposes only.

3. Repeat step 2 for the second trans-
mit frequency, if used.

4-10-5. Subaudible- and Carrier-

Deviation Adjustment

1. Connect deviation meter to "Freq.
Counter/Deviation meter" output of
the relative output indicating de-
vice.

2. Select desired operating frequency
with channel-selector switch; then,
if subaudible-tone squelch is used,
key transmitter and adjust '"Subau-
dible Dev. Adj." R113 (located on
SA-1 subaudible-tone board) to pro-
duce an output deviation of +1 kHz,
as indicated on the deviation me-

tere

J1O1

SA-}
(TOP VIEW)
R113
Subaud.
Dev.

Adj.

° IC101
4 B rc102 fEer
j R «|
(°) GD Het)
Figure 4-10. Subaudible-Tone Board

3. Do NOT key transmitter during this

step. Feed a 1700-Hz audio signal
into transceiver microphone. Set
Mic. Gain potentiometer R304 to

maximum resistance (max. gain) by
rotating wiper toward receiver side
of main circuit board. Connect os-
cilloscope vertical-input lead to
pin 1 of IC301, and adjust Symmetry
potentiometer R302 until displayed
waveform limits
both top and bottom of waveform.

4. Key transmitter, observe frequency—
deviation meter, and increase 1700

Hz microphone audio input until no
further increase in deviation is
indicated. The modulator stage is

now saturated.

symmetrically on.

Use at your own risk.

4-10-6.

The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages.
Copyright © 2007 Genave/NRC,

Unauthorized reproduction is prohibited.

Set deviation potentiometer,
as follows:

R309,

Without subaudible tone: Set R309
for a deviation reading of +5 kHz
with the 1700 Hz tone applied to
microphone,

With subaudible tone: Set R309 for
a combined subaudible and 1700 Hz
tone deviation reading of +5 kHz.

Switch deviation meter to the + and
- positions, and check amount of
deviation in each position.

For normal operation, mic. gain po-
tentiometer R304 is set at mid-
range. If unit is to operate in an
area having a high acoustic noise
level, mic. gain can be reduced by
rotating gain potentiometer away
from the maximum gain position.
This will help reduce amount of
noise being transmitted along with
the voice.

Reserved

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages.

Use at your own risk.

Model: SynCom

Unauthorized reproduction is prohibited.
All rights reserved.

4-15

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.

4-11. SA-1 SUBAUDIBLE-TONE PROGRAMMING

The following paragraphs contain all
the information normally required to
install an SA~1 Subaudible-Tone Board
in a Genave SynCom transceiver, or to
change the subaudible-tone frequency in
an existing SA-1/SynCom installation.

In conjunction with the following in-
formation, reference should be made to
the SA~1 Service Manual for Theory of
Operation, Schematics, and Parts Lists
for the SA-! tone board.

ee Initial Installation

SA-l tone boards shipped from the fac-
tory with the resonator installed have
been pre-tuned, and are ready for in-
stallation.

First, determine which operating chan-
nel(s) are to employ tone squelch. If
two simplex channels are programmed in-
to the transceiver, the tone squelch
may be used on both channels, or may be
used on only one channel by installing
two diodes in transceiver control head
to "inhibit" tone squelch on channel
where it is not desired.

NOTE: If tone squelch is to be used
on two operating channels, the same
subaudible frequency must be used
on each channel; there are no pro-
visions for changing tone frequency
as the channel selector is rotated.

Next, gain access to programming board
in transceiver control head by remov-
ing control head as explained in Sec.
4-5 of this manual. It is NOT necessary
to remove programming board from con-
trol head to install SA-l tone board.

Install squelch programming diodes (if
required) as follows; If tone squelch
is to be used on all programmed fre-
quencies, then no diodes need be in-
stalled. I£ channel #1 (on front-panel
channel~selector switch) is to use tone
squelch, but channel #2 is NOT, then
install two 1N4148 silicon diodes from

SW50K:; Gif Zan tooPaAQ2i:Ppinug andiP 5Q2 abany Baa completensYAGUENGIS A nd..Genane, RAN gud Oeck BE warrantea.

that cathode (banded-end) of each diode
connects to P502.

NOTE: Solder diodes to appropriate
pins on P502 BELOW the plastic pin
support. If diodes are soidered to
pins ABOVE the support, the copper
tracks on the SA-1 board may short
against the diode leads.

If channel #2 (on front—panel channel-
selector switch) is to use tone squelch
but channel #1 is NOT, install two IN-
4148 diodes from SW501 (#1) to P502 pin
2 and P502 pin 3 (refer to Figure 4-4).

Prior to installing SA-1l tone board in
control head, REMOVE JUMPER WIRE CON-
NECTED DIRECTLY BETWEEN PIN 4 (Audio
In) of P50i and PIN 6 (Audio to Vol.
Cont.) of P502 ON PROGRAMMING BOARD;
then, the two receptacles on tone board
are carefully aligned with the corre-
sponding plugs on control head program-
ming board. Push SA-1 tone board down
until it is fully seated on connecting
pins. Next, it is only necessary to set.
subaudible deviation and the combined
tone~voice deviation as outlined in
Sec. 4-10-5, and check rec. operation.

After deviation has been adjusted, and
unit is working properly, re-assemble
transceiver.

4—~11-2, Changing Tone Frequency

If it is necessary to change tone fre-
quency from the factory-set value, pro-
ceed as follows:

With control head removed from trans-
ceiver, remove SA-1 tone board from the
programming board by gently, but firm-
ly, rocking SA-1 board while pulling it
up and off mating plugs; then, remove
ceramic resonator and capacitor Cl1O0l.
Refer to Figure 4-10.

NOTE: The resonator determines tone
frequency; therefore, a different
resonator is required for each dis-
crete subaudible-tone frequency.
Refer to Table 2-1 in SA-1 Service
Manual for list of EIA subaudible

exactly as sHOWi IH! “FLRUFE* “FARING ES,.. Mec OPPASP HHA NG RESO rarESrS eo Premettes

4-16

Model: SynCom

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages.

Use at your own risk. Unauthorized reproduction is prohibited.

Now, select division ratio Foe SALTS ber Ato rPect value for C101 is deter-

oscillator/multiplier by soldering a
jumper on bottom side of PC board be-
tween IC101 and I1C102 as follows: If
subaudible tone is below 131.8 Hz, con-
nect pin 8 of IC102 to pin 14 of IC101;
but if frequency is above 136.5 Hz,
connect pin 8 of 1C102 to pin 6 of IC-
lol.

Install new resonator on SA-1 board. On
newer production units, the resonator
leads plug into socket pins; whereas,
in earlier runs the resonator leads
were soldered in place.

Temporarily replace SA-1 in position on
programming board and connect trans-
ceiver to its power source. Measure the
subaudible-tone frequency at pin 3 of
P502 (6-pin plug). BE SURE TRANSCEIVER
IS SET ON FREQUENCY EMPLOYING TONE
SQUELCH. Now, select a capacitor for C-
101 which will provide correct tone
frequency at pin 3. For resonators
shipped prior to June l, 1978, C101
will fall between 390 pF and 690 pF;
whereas, C101 will be 0 to 100 pF for
resonators shipped after June l, 1978.

mined, solder C101 in place on the SA~l1
board; then, carefully replace tone
board in control head. Check receiver
and transmitter operation as outlined
below.

If another unit with the correct sub-
audible tone frequency is available, it
may be used for on-the-air testing;
otherwise, set a signal generator to a
10 uV level on the appropriate operat-
ing frequency with +1 kHz deviation at
the desired subaudible-tone frequency.
With test signal (from antenna or sig-
nal generator) applied to receiver,
note that receiver unsquelches and op-
erates normally.

The transmitter subaudible deviation
should be 1 kHz +200 Hz, as given in
Section 4-10-—5 of this manual.

After transmitter and receiver are
found to be operating properly, re-
assemble unit, and complete records,

4-12. SCHEMATICS AND COMPONENT LOCA~
TION DIAGRAMS

This section of the SynCom Maintenance
Manual contains schematics of the unit
main PC board, the synthesizer board,
and the control head, as well as com-
ponent location diagrams for the main
board, and the synthesizer.

Refer to the component location draw-
ings for location of adjustments called
out in the transmitter and receiver
alignment procedures,

NOTE: For troubleshooting purposes,
voltages are shown on synthesizer
and main board schematics, while
synthesizer waveforms are given. on
Synthesizer Block Diagram, Figure
4-2,

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or

Model . SynComve shall not be liable for any loss or damages.
°

Apres
Use at your own risk. Unauthorized reproduction is prohibited. "

ITEBO ARO

This manual is for educational purposes only. The accuracy and completeness of the information provided nérein is not guaranteed ‘or warranted.
Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized#r8groduction is prohibited.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.

SHOWN AS.
FROM, COMPO]
SIDE OF CIR

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Figure 4-11. Main B30ard Component Location
This manual is for educational purposes only. The accuracy Top View the information provided herein is not guaranteed or warranted.

Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc. All rights reserved.

4-18 Models T-7044000

R106
100

C34

- 5 189 ase + C307
Go) 1000/7 30V

R3K
O50

R304
. se GAIN SOK
‘ah Ht 02
| ‘300K
TO PIN}
P40
“aT
"paar 301 1OMFD
cass H C36 £H2
ott wep poary 12
1047
—+__4. oe 4
NOTES
FOR EXTERNAL SPEAKER, OMIT uti
AND CONNECT SPEAKER FROM a Swe
TO PIN 7 OF PlOl.
2, DC VOLTAGE MEASUREMENTS
AREADINGS TAKEN WITH 20.000 CHMS— PER— VOLT METER,

B, VOLTAGE MAY VARY 20% FROM THE VALUES LISTED.

CALL TRANSMITTER VOLTAGES WITH UNIT KEYED INTO 50 onta Loan,

v402 4404-9403

—

TO
SYNTHESIZER

i Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc. All rights reserved.

680
XMIT sq At Sw
LED ‘At

{ This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

This manual is for educational purposes only.
Genave shall not be liable for any loss or damages.

Use

at your own risk.

Ine.,;. abl. rights

reserved.

Iclo2

5.5V

390V

.59V
CI3 CRIOS rs

RCV RF IN

The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Unauthorized reproduction is prohibited.

Q,05V SQUELCHED
1.17V NOT SQUELCHED

Ra08 Cat9 C222 jcz23 icz2a
i 7 IMED) 105 ==.001 >= 330
cau
470
= CR 304
case |cei4 | cais
+05 L601 L150
L207
crt eae
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= > : XMIT
L205 PTT : |
—— ck ¢208
<001 L208 ik 135V ov |
0,3V C235. 18-115 L206 cast az08
14-80 = IS-15 L208 cg26 zB Lz10 tzt2
" #—13,5V
R2i1 R213 ou, 294 ene tf alts Fa 1 ROE Ye C234
150210 ear Caria | c22s L209 22 22 150
bi i c239 R24 — iZ 201 Ws C218 ic220 15=115 L2ti L2i3
47 iV, R216 Shean i L: C227
56 MA 47 may i
—— *. i i
sais ETCHEO ON
—~ MAIN BOARD
‘. : SQUELCH
=
= VOL, -—E j=
1At + AUDIO
a TO JIOl = TO 101
= +PIN 10 PIN
v v Aubié our SYNCOM
17? 8 i | Pid2
ho VOL, KEYLINE NOT
: USED

This manual is for educational purpo
Genave shall not be 1

Model:

T-7044000

EABGrs, Vee LQendMa ly

NRC,

a gy,

Inc

eS of the information provided herein is not guaranteed or warranted.

ard ‘Sehenarie reproduction is prohibited.

4-19

This manual is for educational purposes only.

The accuracy and completeness of the informati' Pegirovided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages.{ Use at your own risk. hoaeatnencae reproduction is prohibited.

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Genave shall not Pune: nthes Ese hematckiers reproduction is prohibited.
eet © ¥ seer NRC, tn Se

4-20

Model: T-7044000

et vee any loss or damages.

sc peagraat

The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.

a” This manual is f : Biuegt ional purposes Rie
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This manual is for educational purposes only.

Genave shall not be liable for any loss or damages.

Unauthorized reproduction. is prohibited.

The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Use at your own risk.

Genave shall not be.liable for any loss or damages.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.

This manual is for educational purposes only.

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4-22

P50e2 :

CR528

CR526
R502
R503

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This manual is for peational pur race see e accuracy and completeness of the informatign provided herein is not guaranteed or warranted.
Lp gor

Genayg BPUIMNE b a, OnELObk@s ea 4: Component Orbea a rysection is prohibited.

Model: T-7044000 4-23

This manual is for educational purposes only. The a Aas 1 ge yg jhe mation provided herein is not guaranteed or warranted.
Genave shall not be liable for any’ s anager s i jy 9 ro isk. Unauthorized reproduction is prohibited.
Copyri Gi vi i wall hts reserved.

5-1. INTRODUCTION The assembly or section number (100,
200, ...) is indicated next to the ref-

This section contains a list of all erence number heading; that is, CAPACI-

replaceable electronic parts for the TORS Ci00, or CAPACITORS C200.

SynCom transceiver, as well as major

mechanical components. In general, the following system of
numbering is used; 100-series numbers

The first column in the Parts List con- pertain to receiver items; 200-series

tains component reference numbers. The numbers indicate transmitter parts;

three-digit circuit reference on the 300-series are amplifier/modulator;

schematic is represented in the REFER- 400—-series numbers are for synthesizer

ENCE NUMBER column by the last one or components; and 500-series items are

two digits. The first digit represents used in control head.

the assembly, or section, of unit in

which the part is located. Genave part numbers for replaceable

items appear in the Part Number column,
while a brief description for each part
is shown in the Description column.

Reference Part
Number Number Description

CAPACITORS C100

L 1510015 Gimmick, 2.2 pF, + 10%

2, 3, 6, 9 1570120 Trimmer, 1-6 pF

ll, 14

4, 5, 7, 10, 1520028 YSE, Disc, 150 pF +102

13, 24, 42

8 1510004 Gimmick,,27 pF, +10%

12 1510008 Gimmick, .56 pF, + 10%

15, 19, 22, 27 1520071 mor, Disc, .001 pF, +104
16, 44, 48 1541009 Elect, 47 uF, 16 V

17, 20 1510026 NPO, Gimmick, 5.6 pF

18, 21 1510014 NPO, Gimmick, 1.8 pF, +10%
23 1530007 Sil., Mica, 680 pF, +10%
25 1520010 NPO, Disc, 18 pF

26, 28, 29, 51 1520054 M25, Disc, .O5uF, +80-20%,25 V

Model: SynCom aed

Reference Part
Number Number Description

CAPACITORS C100 (Cont'd)

30 1520042 Y5E, Disc, 470 pF

31 , 1520022 N220, Disc, 100 pF, +10%

32, 36, 39 1520051 Y5U, Disc, .01 uF, +20%, 25V
33, 34 1520037 YSE, Disc, 330 pr, 7107

35 1520007 NPO, Disc, 10 pF, +102

37, 38, 52, 53, 1540014 Elect, 10 uF, 25V

40, 47 1520055 Y5E, Disc, .1 uF, +80-20%, 12V
41 1520083 YSE, Disc, .033 pF, +202

43 1540023 Rieet, 150 uF, 1l6V

45 1520057 Magna, Disc, .22 uF, +80 20%
46 1500004 Poly,.0015 wF, +10%, 630V

49 1540038 Elect, 1000 uF, 30V

50 1540049 Elect, 500 uF, 12V

55 1520014 NPO, Disc, 39 pF

56, 57 Not Assigned

CAPACITORS C200

1 1520015: . N1500, Disc, 47 pF, +10%

2, 3, 15, 34, 1520028 Te, Disc, 150 pF, +10%

37, 38

4, 12 1520013 NPO, Disc, 33 pF, +102

5 1520007 NPO, Disc, 10 pF, +10%

6, 10, 35 1560403 Trimmer, 4-40 pF

Ty 36 1520054 M25, Disc, .05 uF, +80-20%, 25V
8, 9, 14, 23 1520071 ZP, Disc, .001 uF, +102

1l 1520042 Y5E, Disc, 470 pF

Reference
Number

13, 07, 21
25

16, 18
19
20
22
24

26, 27, 28, 29,
30, 32

31
33
39, 40

CAPACITORS C300

iy, by.%05 00;
14, 16

3, 4, 13

9, 12

CAPACITORS C400

1 > 4 3 7 > 9 3
10, ll, 12, 24,

37, 38, 43, 47, 52

2, 3, 48, 50

5, 8, 20, 45

Model: SynCom

The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Part
Number

CAPACITORS C200 (Cont'd)

1560406

1520022

1540002

1520014

1520054

1520037

1520011

1510014

1510015

1520018

1520059

1520028

1520053
1540002
1540038
1540014
1500018

1500013

Not Assigned

1550002

1520054

1520051

Use at your own risk.

Unauthorized reproduction is prohibited.

Description

Trimmer, 15-115 pF

N220, Disc, 100 pF, +10%
Elect, 1 uF, 35V

NPO, Disc, 39 pF

M25, Disc, .05 uF, +80-20, 25V
Z5E, Dise, 330 pF, +102

NPO, Disc, 22 pF

NPO, Gimmick, 1.8 pF, +10%
NPO, Gimmick, 2.2 pF, +10%
N220, Disc, 56 pF, +102%

Cer, Disc, .1 uF, +80-20%, 12V

Y5E, Disc, 150 pF, +102

M25, Dise, +02 UP, +104, Z5V
Elect, 1 uF, 35V

Elect, 1000 uF, 30V

Elect, 10 uF, 25V

Mylar, .01 uF, +102, 100V

Mylar, .0047 uF, +10%

Tant., lwuF, 35V

M25, Disc, .05 uF, +80-20%, 25V

Y5U, Disc, .01 uF, +20%, 25V

Reference Part
Number Number Description

CAPACITORS C400 (Cont'd)

6, 46, 49 1540023 Elect, 150 uF, 16V

13, 15, 21, 44, 1520055 Magna, Disc,.1uF, +80-20%, 12V
51, 72

14 1550003 Tant, 3.3 uF, 35V

16 1530013 Sil. Mica, 56 pF, +5%

17 1520001 NPO, Disc., 2.2 pF, +10%

18, 22, 25, 28, 30 1520028 Y5E, Disc, 150 pF, +10%, 25V

42, 54, 55, 56,
57, 58, 59, 60,
61, 62, 63, 64,
65, 66, 67, 68,
69, 70, 74, 75,

76, 77, 80

19, 23, 73, 79 1520071 Z5P, Disc, .001 UF, +10%, 1000V
26, 71 1520034 Y5E, Disc, 220 pF, +10%, 25V
27 1520197 NPO, Disc, 3.3 pF, +10%, 25V.
31, 40, 81 1520011 NPO, Disc, 22 pF, +10%

32 1520006 NPO, Disc, 8.2 pF, +10%

33 1520015 Ni500, Disc, 47 pF, +10%

34, 35 1520022 N220, Disc, 100 pF, +10%

39 1530017 Sil. Mica, 150 pF, +5%, 500V
29, 53 Not Assigned

4l 1570009 Trimmer, 3-18 pF

78 1510008 Gimmick, .56 pF, +10%

CAPACITORS C500

1, 2, 3, 4, . 1520028 Y5E, Disc, 150 pF, +10%, 25V
: +

FILTERS FL100

13.25. 35: 4 2303504 Monolythic Crystal 10.7 MHz,
4p

This manual is for educational purposes only.
Genave shall not be liable for any loss or damages.

Reference
Number

DIODES CR100

1, 2, 5
3. 4

7 .

8, 9, 10, 11
12, 13

DIODES CR200
1

DIODES CR300

ft
2

3, 4, 5

7, 8, 9, 10

DIODES CR400

1, 2, 3, 4
12

6, 13
7
8
9, 10, 11

DIODES CR500

Model: SynCom

The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Unauthorized reproduction is prohibited.

Use at your own risk.

Part
Number

4810017
4810021
4810008

Not Assigned

4810017

4810007
4810011
4810013

Not Assigned

4810017

4810034
4810027
4810007
4810008

Not Assigned

4810017

Description

Sil. 1N4148
Gen. Purpose 1N34A

Zener, 10V, 1W

Sil. 1N4148

Zener, 6.8V, +5%

Zener, 24V, 1W

Gen. Purpose 100 PRV, 1A

Sil. 1N4148

Varicap MV2210
Varicap MV2201
Zener, 6.8V

Zener, 10V

Sil. 1N4148

Unauthorized reproduction is prohibited.

5=5

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

Reference
Number

INTEGRATED CIRCUITS IC100

4, 5, 6

INTEGRATED CIRCUITS 1C300

2, 3, 4

INTEGRATED CIRCUITS IC400

1
2

19, 20

INTEGRATED CIRCULTS 1IC500

Part

Number

3130017
3130024
3130020

Not Assigned

3130012

Not Assigned

3134044
3130028
3130027
3130046
3130031
3130047
3130030
3130029
3130032
3130035
3130033
3130042
3130037

3130036

3130373

Unauthorized reproduction is prohibited.

Description

RF. Amp MC1350P
Quad Det. CA3075

Audio Amp. CA810

Op Amp N5558

MC4044P, Phase Detector

MC1648P, VCO

MC4060AE, Divider

MM74C90N, Divider

MC12013AL, Prescaler

MC3060L, Flip - Flop

MC12014L, Counter Control
MC12020L, Offset Control
MC4018P, Programmable Hexadecima
MC12021P, Offset Programmer
MC4016P, Programmable Decade Cnt
MC7400P, Quad, 2-input Gate
MC7805CP, 5V, 1 Amp., Regulator

MC78LO5CP, 5V, Regulator

MC7404, Hex Inverter

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.

5-6

Unauthorized reproduction is prohibited.

Model: SynCom

Reference Part
Number Number Description

CONNECTORS (JACKS) J100

2 2100259 Molex 13 Pin

CONNECTORS (JACKS) J400

2, 5 2100261 Molex, phono

3, 4 2100019 Socket, phono
CONNECTORS (PLUGS) P400

LTA&B 2100257 Molex, 13 Pin
CONNECTORS (PLUGS) P500

1 2100070 Molex, 4 Pin

INDUCTORS L100

1 1800226 Coil, 7T

2 1800225 Coil, 7T, TAP 3T

3 1800116 Coil, 4 1/2T

4 1800117 Coil, 6 1/2T, 1 1/4T

5 1800118 Coil,.6 1/27

6 1800125 Coil, 3 1/4T, 5 1/2T TAP at
3 1/4T

7 1800332 Choke 56 yH

8, 9, 10 Not Assigned

INDUCTORS L200

1, 15 1800124 Choke, 2.7 uH, Wilco 27G
2, 12 1800203 Coil, 3: 1/2T
3, 4, 6, 8, 1800201 Coil, 2 1/2T LHH
10
5 1800202 Coil, 2 1/2T RHH
7, 9 1800204 Coil. 4 1/2T
11. 13 Etched on P.C. Board
1800205

OoL
This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc. All rights reserved.

Model: SynCom 5-7

Reference Part
Number Number Description

INDUCTORS L200 (Cont'd)

16, 17, 18, 19 Not Assigned

INDUCTORS L300

1 1800247 Choke, .65 mH, 7A
25 3 Not Assigned

INDUCTORS L400

1, 5 1800360 Coil, 220 pH
2. 1800264 Coil, 39 vH

3 1800319 Coil, 11/2 T
4, ll, 13, 14, 1800124 Coil, 2.7 vH

15, 16, 17, 18,

6 1800367 Coil, Torroid, 5 7

Jy 8595.10 1800366 Coil, 4 T, center-tapped
12 1800365 Choke, 10 uH

TRANSISTORS Q100

1, 3 4800068 MOSFET, Dual Gate 3N201

2 4805486 J FET, NeChainel 2N5486
4,5 4805484 J FET, N-Channel 2N5484

6 4800026 Sil. NPN MPS 3693

7, 8 4800028 Sil. NPN, Red Dot MPS 6514S
9 4800018 Sil. NPN, Audio MPS~U01
10, ll, 12 Not Assigned

TRANSISTORS Q200
ae 4804427 Sil NPN 2N4427

4 4806080 Sil NPN RF Power 2N6080

Reference Part
Number Number Description

TRANSISTORS Q200 (Cont'd)

5 4806082 Sil NPN RF Power 2N6082
6 4800051 Sil NPN Darlington MPSA13
7, 8, 9 Not Assigned

TRANSISTORS Q400

1, 2, 8, 9, 4800007 Sil NPN Brown Dot SPS1423
10 2N4264

3, 4 4800029 Sil NPN Orange Dot MPS6513
5, 6, 7 4800024 Sil NPN Blue Dot MPS3563
11 4800051 Sil NPN Darlington MPSA13

RESISTORS R100

Ly 2h y 29 4700045 47K, +10%, 1/2W
2 4700047 100K, +10%, 1/2W
3, ty Sy. 6, 4700013 1002, +10%, 1/2w
11,12, 135.33

7 4700050 120K, +10%, 1/2W
8, 10, 16 4700035 6.8K, +10%, 1/2W
Os 22 4700058 IM, +10%, 1/2W
14 4700033 4.7K, +10%, 1/2W
13; 30 4700041 22K, +10%, 1/2W
17.20 4700049 1OOK, +10%, 1/2W
18 4700037 10K, +10%, 1/2W
19 4700003 102, +10%. 1/2W
23, 24 4700043 33K, +10%, 1/2W
25 | 4700057 470K, +10%, 1/2W
26 4700032 3.9K, +10%, 1/2W
28, 31 4700011 682, +10%, 1/2W

4700010

This manual is for educational purposes only. The accuracy and compléténeSs of the information pr OSea nthO%s sth L2Wanveca or warranted.
Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc. All rights reserved.

Model: SynCom 5-9

Reference Part
Number Number Description

RESISTORS R100 (Cont'd)

35 4700025 IK, +10%, 1/2W
27, 34, 36, 37, Not Assigned
38, 39, 40

RESISTORS R200

i ¥y. 12 4700024 8202, +10%, 1/2W
2 4700031 3.3K, +10%, 1/2W
3, 4, 5, 8 4700006 2.22, +10%, 1/2W
6 4700033 4.7K, +10%, 1/2W
9, 13 4700003 109, +10%, 1/2W
10, 18 4700029 2.2K, +10%, 1/2W
ral 4700015 1502, +10%, 1/2W
14, 16 4700009 470, +10%, 1/2W
17 4700037 10K, +10%, 1/2W
19 4700023 6802, +10%, 1/2W
> 20, 21, 22, Not Assigned

RESISTORS R300

1 4700045 47K, +10%, 1/2W

2 4760039 500K, Var., +20%
3, 10 4700015 1502, +10%, 1/2W
4, 9 4760021 5OK, Yar., +20%

5 4700037 10K, +10%, 1/2W

6 4700043 33K, +10%, 1/2W

7 4700035 6.8K, +10%, 1/2W
8 4700034 5.6K, +102, 1/2W
11, 12, 13, 14 Not Assigned

5-10

Reference Part
Number Number Description

RESISTORS R400

1, 32 4700003 10Q, +10%, 1/2W
2 4710007 682, +5%, 1/4W
3, 23 4710049 822, +10%, 1/4W
4 4710068 68K, +5%, 1/4W
5, 26, 27, 31 4710008 1002, +5%, 1/4W
6, 7, 9, 17 4710035 47K, +5%, 1/4W
8, 63 4710033 33K, +5%, 1/4W
10, 11, 12, 20 4710019 1.5K, +10%, 1/4w
13, 24, 29 4710026 5.6K, +5%, 1/4W
14, 15, 19, 46, 4710017 IK, +5%, 1/4W
47, 48, 49,

57, 58, 68

16, 51 4710022 2.7K, +5%, 1/4W
18, 62 4710063 100K, +10%, 1/4W
21 4710012 3302, +5%, 1/4W
22 4710004 222, +5%, 1/4W
25, 28, 45 4710019 1.5K, +10%, 1/4W
30, 35, 56 4710010 1802, +5%, 1/4W
33 4710013 4702, +10%, 1/4W
36, 37, 38, 39, 4710029 10K, +5%, 1/4W
40, 41, 42, 43,

44, 60, 61, 67

34, 55 4740016 42, +10%, 5W

59 4710039 470K, +10%, 1/4W
64 4700014 1202, +102, 1/2W
65 4720014 150K, +12, 1/4W
52, 53, 54, 66 Not Assigned

This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Model . Syntom Copyright © 2007 Genave/NRC, Inc. All rights reserved.

Reference Part

Number Number Description

RESISTORS R500

1 4710029 10K, +5%, 1/4W

2 4710017 1.0K, +5%, 1/4W

2 4710018 1.2K, +5%, 1/4W

4 4760051 25K, Var., Squelch

5 4760057 25K, Var., Audio Taper with
SW510

SWITCHES SW500

1 5100128 4 Pole, 2 Pos., rotary

25.3 5100098 Slide, SPDT, CH1I5W, 43-000~-121
4, 5, 6, 7, 5100137 BCD, 10 pos,, micro DIP

8, 9

TRANSFORMERS T100

Le ee 5600098 10.7 MHz, IF Blue
ae 5600046 10.7 MHz, IF Orange
6, 7, 8 5600012 455 kHz IF

9, 10 Not Assigned

TRANSFORMERS T200
1 5600099 Buffer Trans.
2 Not Assigned

CRYSTALS Y400

1 2302452 XTAL, 3.2 MHz, .0005%, wire
leads

MISCELLANEOUS

RT401 4760034 Thermistor, 10K Fenal JA41J1

K301 4500008 Relay, 4 PDT

2201, 2 1800063 Choke

F301 5140021 Fuse, 10 Amp

o-12

This manual is ‘for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.

Reference Part
Number Number Description

MISCELLANEOUS (Cond't)

2510241 Bracket, mounting
2400025 Thumbscrew, (knob)
2820010 Washer, nylon (for thumbscrew)
2510236 Bracket, head mounting
2502088 Cover, top/bottom
2510268 Front, plastic
1325077 Microphone
SP501 1320025 Speaker, 3.5", 3.22
1870003 Core, Ferrite Bead, 57-0180

Model: SynCom

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