Document text
This manual is for educational purposes only.
Genave shall not be liable for:any loss er demagent
Copy
The accuracy and com
isk.
ECOM-40
VHF-FM
MAINTENANCE MANUAL
General Aviation Electronics, Inc (Genave), warrants this
‘oduct to be free [rom material defects for a period of 9 days
from the date of purchase, pcovided the warranty registration
rd propery Bled out returned by the purchaser to Genave
Within 10 days after purchase, This warranty is limited to the
original ‘purchaser and is not extended to second owners
of any parts (except periodic maintenance items such as bulbs,
fuses, etc.) which, upon onr examination, appear 10 us to De
defective in matctinls or workmanship. The parts will be re-
placed within 45 days after receipt of the unit, provided the
nit is Gelivered to the Factory (Customer Service Dept., Gen-
erat Aviation Electonics, 4141 Kingman Drive, Indisnspolis,
Indiana 46226) within 90 days after the cate of purchase, shnp-
1g Prepaid. Alt shipping costs and labor charges shail be born
the purchaser
‘The owner may clect to have the unit repaired mt 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 peepaid to the Factory (Customer Serv-
ice Dept. General Aviation Eectronxs, 4141 Kingman Drive,
Indianapolis, Indiana 46226}. Purchaser shall bear any and all
‘other costs including but not limxed 10 labor, transportation and
Srcight.
This warranty doet noi apply tc defects, malfunction. oF
breakage due to improper installation of to the servicing thereof
LIMITED
by other than an authorized Genave dealer aor to units that
have been damaged by lightning or other scts of God. excess
current, o¢ any units that have sd serial number altered or
Femoved, Abuse, misuse, tampering, submersion in water oF
willful destruction of the unit will also void this warranty.
‘This warranty gives you specific legal rights. You also have
implied warranty tights. In the event of a problem with war
fanly service of performance, you may be able to go to a small
claims court, a Siale court, or 3 Federal District court
Genave offers this warranty in lieu of any
and all other guarantees or warranties, either
EXPRESSED or IMPLIED, including but not
limited to warranties of merchantibility and/or
fitnesa for a particular purpose. Any implied
warranties are specifically and expressly limited
to the Waly period specified herein, Damages
for breach of any warranties, either expressed
or implied are limited to replacement of any
defective parts as specified herein and any other
incidental or consequential damages are ex-
presaly excluded.
Bectronies, 4141 Kingatan Oct, ndionapoks, Indiena $8228— Arua 317 - 546-1111
"MARINE & LAND MOBILE Marine Pub. No. 0910009: Lend Mobile Pub, No. 0910010
Genave
4141 Kingman Drive, Indianapolis, Indiana 46226
AREA (317)
546-1111
Specifications subject to change without notice
Copyright 1980 -- Genave
Printed in U.S.A. Mar, 1981
-- All Rights Reserved
(Rev. )
teness of the information provided herein is not guaranteed or warranted.
Unauthorized reproduction is prohibited.
Th £ 1 ‘
is manual is for educational purposes onl-egh accPt andNOnpi 054006 Zn information provided herein is not guaranteed or warranted
Genave shall not be liable for any loss or damages. Use at your own risk. ,
Unauthorized duction i isi
Copyright © 2007 Genave/NRC, Inc. All Sep rocueht on ie: PEonipated-
rights 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.
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 Furnished
1-5 Optional Equipment Available
SECTION II INSTALLATION MANUAL
2-1 Introduction
2-2 Battery Installation
2-3 Antenna Information
SECTION III OPERATING MANUAL
3-1 Operating Controls
3-2 Operating Instructions
3-3 Licensing Information
3-4 F.C.C. Field Engineering Offices
SECTION IV MAINTENANCE MANUAL
Introduction
Theory of Operation - General
Theory of Operation - Receiver
Theory of Operation - Transmitter
Disassembly
Unit Reassembly
Alignment Procedure - General
Alignment Procedure - Receiver
Alignment Procedure - Transmitter
Frequency Changes
Crystal Specifications
Component Layout & Schematic
ECOM-40 DC Voltages
Speaker/Mic. Wiring Options
Sia TOR Ob Gis Tues es Gs Tae TT
SH Ht HI OO OWNHDHO HPWH
RPWNM OO
SECTION V PARTS LISTS
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. »
Genave shall not be liable for an:
This manual is for educational purposes only. The SE CTION.. | provided herein is not guaranteed or warranted.
y loss or
lamages
Copyright © 2007 Genave/NRC, Inc.
Use at 3euE ove risk. Unauthorized reproduction is prohibited.
all rights reserved.
GENERAL INFORMATION
1-1. INTRODUCTION
This manual contains all the informa-
tion normally required to license, im-
plement, and operate the Genave Model
ECOM-40 VHF-FM transceiver.
The maintenance manual contains all the
above information, in addition to unit
schematics, alignment data, and parts
lists.
1-2. DESCRIPTION
NOTE: The ECOM-40 transceiver has
the capability of transmitting and
receiving on frequencies assigned
by the F.C.C. to the various Busi-
ness Radio Services, such as: Land
Transportation, Industrial Radio,
and Public Safety, and thus MUST BE
LICENSED PRIOR TO ACTUAL USE. While
the seller may assist in filing the
license application, the responsi-
bility lies solely with the pro-
spective licensee to assure that
transmitting equipment is covered
by a valid station license.
The ECOM-40 is a handheld, portable
VHF transceiver designed for the trans-
mission and reception of frequency mod-
ulated (16F3) radio signals on any one
of four channels within the range from
143.9 to 173.4 MHz. A four=-position
slide switch selects the desired oper~
ating channel -- each of which may be
either simplex or duplex, depending up-
on crystal frequencies installed within
the unit. Note, however, the maximum
spread between highest and lowest fre-
quencies installed in the unit is 2 MHz
for either receive or transmit.
The receiver and transmitter circuits
each utilize standard quartz crystals
with a frequency-netting trimmer pro-
vided for each receive and each trans-
mit crystal to allow precise frequency
adjustment.
This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Use at your own risk.
Copyright © 2007 Genave/NRC, Inc.
ECOM-40 10/80
Genave shall not be liable for any loss or damages.
Model:
If the transceiver is equipped with the
CICSS sub-audible tone option, a tone~
override switch on the unit's top panel
“is provided to permit communications
with other transceivers NOT equipped
with your sub-audible tone frequency,
and to permit monitoring the frequency
prior to initiating a call.
The transmitter provides a typical RF
output of 1.5 watts minimum into a 52-
ohm standard antenna system over the
frequency range from 143.9 MHz to 173.4
MHz. The frequency accuracy is adjust-
able to +100 Hz, and the frequency sta~
bility is +.001% from -30°C to +50°,
A 1l-kHz modulating audio signal will
give a deviation of +5 kHz maximum.
The receiver is a crystal-controlled,
dual~conversion superheterodyne employ-
ing a 4-pole monolithic crystal filter
for good selectivity. A single inte-
grated circuit performs 2nd mixer, 2nd
IF amplification, limiting, and detec-
tion funcitons. The 10.7 MHz Ist IF
provides good image rejection, while
the 455 kHz 2nd IF improves receiver
stability. The receiver frequency accu-
racy is adjustable within +500 Hz, ana
the frequency stability is ; +, 001%. The
receiver audio output power typically
is 350 mW at less than 10% distortion.
A self-contained battery pack, consist-
ing of 8 nicad cells, supplies 9.6 VDC
to operate the unit. An external charg-
ing jack and a diode, which prevents
"reversed=polarity" charging, provide
for charging the battery pack while in-
stalled in the transceiver.
The transceiver is housed in a rugged
Lexan case -- this easily-removed, two~
piece, durable plastic cover protects
the instrument from dirt and physical
damage while maintaining the unit's
light weight (less than 2 pounds).
Unauthorized reproduction is prohibited.
All rights reserved.
1-1
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/NRG, Inc., all rights reserved.
The transceiver is complete with an-
tenna, 9.6V nicad battery pack, battery
charger, and built-in speaker/micro-
phone, A helically-loaded, rubber-clad
flexible antenna with an 8-32. threaded
mounting is standard equipment with the
ECOM-40: however, a helically loaded,
rubber-clad flexible antenna with a BNC
mounting is available as an option at
time of purchase.
transceiver components are mounted
on a single "double-sided," printed-
circuit board.
Operating controls for the unit (Vol-
ume, Squelch, Charging Jack and Antenna
or connector) are mounted on top panel.
The Frequency Selector switch is locat-
ed'in the lower, right-hand corer of
the front panel. Thus, the controls are
easily accessible when needed, yet do
All circuitry employed is the latest not interfere with the portability or
state-of-the-art design, using the lat- operation of the instrument. The push-
est in semiconductor and integrated- to-talk switch is mounted on the left-
circuit technology. hand side of case for easy one~handed
operation.
1-3, SPECIFICATIONS
i
GENERAL:
8.625" (21.9 em) High; 2.938" (7.46 cm)
Wide; 1.830" (4.65 cm) Deep
Over-all Dimensions:
Internal battery pack; 8 nicad cells,
9.6 volts : 7
Power Supply:
Standby: 25 mA; Receive: 63 mA;
Transmit: 700 mA
Current Drain:
Battery Operating Time: 1.5 Watts = 6 hrs, based on 5% transmit,
5% receive, and 90% standby duty cycle
Frequency Range: 143.9 to 173.4 MHz
Temperature Range: -30°C to +50°C
Number of Channels: 4, maximum
Weight: Approx. 1 Lb (0.45 kg)
RECEIVER:
Sensitivity: 0.35 uV max. (12 dB SINAD)
Adjacent. Channel Rejection: ~55 dB minimum at 25 kHz (12 dB SINAD)
Image Rejection: 55 dB minimum
Spurious Rejection: 55 dB
Intermodulation: 60 dB, minimum
This manual is aes educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
enave 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: ECOM-40
1-2 1/81
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.
RECEIVER (Cont'd):
Modulation Acceptance Bandwidth:
Squelch Threshold:
Hum and Noise Level
Audio Output Power:
Frequency Accuracy:
Frequency Stability:
Maximum Channel Separation:
TRANSMITTER:
1-4,
Output Power
Output Impedance:
Spurious & Harmonics:
Frequency Accuracy:
Frequency Stability:
Modulation:
Deviation:
Subaudible Tone :
Frequency Range:
Maximum Channel Separation:
EQUIPMENT FURNISHED
47.5 kHz, maximum
0.35 uV, maximum
More than 35 dB below 0.25 watts
350 mW at less than 10% distortion
Adjustable within +500 Hz
1.5 watts, minimum
50-ohms, nominal
More than 46 dB below 1.5 watts
Adjustable to +100 Hz
+.001% from -30°C to +50°C
Type 16F3, +5 kHz for 100% modulation
with 1000 Hz audio
+5 kHz maximum, with 1 kHz audio
Optional
143.9 to 173.4 MHz
2 MHz
a. ECOM-40 VHF-FM Transceiver
b. Helically - loaded, flexible antenna
c. 9.6 volt battery pack (8 nicad cells) ~ PSI-32
d. Battery charger - PSI-16
e. Crystal, receive (1) -- specify frequency
f£, Crystal, transmit (1) -- specify frequency
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. 13
Model * ECOM-40 Copyright © 2007 Gen Q ABO Inc. All rights reserved.
rans
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.
OPTIONAL EQUIPMENT AVAILABLE
I
oO
a. Antenna, helically-loaded, rubber-
clad flexible with BNC connector
b. SA-44 CTICSS sub-audible “gone
squelch module.
c. Leather holster for Ecom-40 (GLC-4)
d. Leather flap for holster (GLC-5)
e. Speaker/Microphone (G22)
f. Spare battery pack (PSI-32)
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.
1-4 10/80 Model: ECOM-40
Th:
2-1.
is manual is for educational purposes only.
thc, ange c ft
Genave shall not be liable for adas yo
Cop! OM MceMavemency Mic.,
risk. Unauthorized reproduction is prohibited.
rights reserved.
INSTALLATION MANUAL
INTRODUCTION
This manual section provides installa-
tion and charging data for the nicad
battery pack
handheld transceiver.
cerning the
supplied with the VHF-FM
Information con-
antenna supplied with the
unit is also given.
oe
The 9.6-volt
installed in unit at time of
from the factory,
shipping
The battery pack must
instrument,
2. BATTERY INSTALLATION
nicad battery pack is not
shipment
but is packaged in
with transceiver.
be installed in
charged for a minimum
container
and
of 8 hours, prior to using transceiver.
Remove plastic BACK
ceiver in order to
NOTE: Nicad batteries supplied with
instrument must be installed in the
transceiver in order to charge them
with battery charger that is sup-
plied with unit. This charger will
NOT overcharge the nicad cells. DO
NOT TRANSMIT WITH CHARGER CONNECTED
TO TRANSCEIVER,
cover from trans-—
install batteries.
This cover is easily removed as fol-
lows (See Figure 2-1):
1. Carefully lay transceiver on its
FRONT on suitable work surface. Be
SURE unit is turned OFF.
2, Remove two #4-40 x 1" pan-head ma-
This manual is for educational purposes only. The accuracy and completeness of the i
Genave shall not be liable for any loss or damages.
Copyright © 2007 Genave/NRC, Inc.
Model:
chine screws which secure back cover
to transceiver (item "A" Fig. 2-1).
Lift cover up and off transceiver.
Connect battery-pack to mating con-
nector which is attached to ECOM-40
main PC board. Lay battery pack on
rear of transceiver main PC board,
using foam material supplied to pro-
tect PC board.
ECOM-40
3.
Use at your own risk.
10/80
Figure 2-1. Unit Rear View
Re-install transceiver rear cover.
Be sure cover does not pinch battery
wires; then replace two #4-40 x 1"
screws removed in step 2 above.
Plug cord from battery charger into
charging jack on top of unit; then,
insert charger into 120 VAC, 50/60
Hz, receptacle.
Be SURE volume control is turned
fully counterclockwise to its OFF
position. Allow batteries to charge
for a minimum of 8 hours, and pref-
erably overnight.
NOTE: Disconnect charger from 120 V
source prior to connecting or dis-
connecting charger and transceiver.
Unauthorized reproduction is prohibited.
All rights reserved.
2-1
formation provided herein is not guaranteed or warranted.
formation provided herein is not guaranteed or warranted.
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.
2-3. ANTENNA INFORMATION The ECOM-40 is designed to operate into
a 52-ohm antenna system. The unit is
All VHF communications are basically normally supplied with a rubber-clad,
limited to "line-of-sight" distances. flexible, helically-loaded antenna with
The range to be expected with any par- an 8-32 threaded mounting; however, the
ticular system will depend primarily same antenna, except equipped with a
upon two factors: (1) Antenna heights, BNC connector, is available as an op-
both at the transmitting station and at tion at time of purchase.
the receiving station and, (2) ground 7
terrain between transmitting and re- If it should be necessary to replace
ceiving stations. antenna, the following cutting chart
can be used to insure that antenna is
As a general estimate, two handheld, 2- adjusted for the desired frequency. To
watt transceivers can communicate in a use this chart, find the operating cen-
normal urban environment over approx. ter frequency along the bottom edge of
1.5 miles. A 2-watt handheld communi- chart; then, read upward to the point
cating directly with a 25-watt mobile at which the curve intersects the fre-
unit can transmit approx. 2.8 miles to quency line, Now, read across to verti-
the mobile, but can receive the mobile cal edge of chart to determine proper
for approx. 5.8 miles. If a 2-watt unit antenna length. This is dimension "A"
is working through a VHF Repeater hav- in Figures below. Use Figure 2-2 for
ing a 6-dB gain antenna mounted 100 ft. stud-mounted antennas, but use Figure
above average terrain, and with trans- 2-3 for antennas with BNC mounting.
mitter power of 90-watts, the handheld
can expect to raise the repeater over a
radius of 14 miles; however, the hand-
held will receive the repeater over a
distance of approx. 25 miles.
=I
ac D
<= A -
rl Tr]
f +
ay
8}
:
oil
t+
eT
A?
7 i
INCHES } i
3 |
t an
n i
rat '
zt + .
a i rT 4 ee
t t 7
ey TC i He + iz i |
Lit i ey
10 2 6 HSE ae 54 6e 7 La t 4 66 1S 170 172 174 176
FREGLENCY iN: MHz FREQUENCY IN MHz
Figure 2-2. Stud-Mounting Figure 2-3. BNC-Mounting
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.
2-2 6/81 Model: ECOM-40
This manual is for educational purposes only.
Genave shall not be liable fo
OPERATING
cy of (Bf formation provided herein is not guaranteed or warranted
orga y ty] J cisk. Unauthorized reproduction is prohibited
ae fe naw@/NRe,inc., atl rights reserved
MANUAL
3-1. OPERATING CONTROLS
For reliability and operating conve—
nience, only essential operating con-
trols are installed on the unit's ex-
ternal surfaces. The functions of these
controls are as follows:
1. Charging jack to permit charging
the internal nicad battery pack
2. Earphone jack
3. Volume control/On-Off switch
4. Squelch control, and tone-squelch
override switch.
5. Flexible antenna, or BNC
antenna connector.
6. Built-in Speaker/Microphone
7. Channel-Selector switch
8. Push-to-talk switch
The unit is designed to fit comfortably
in the palm of the hand -- permitting
easy, one-handed operation.
3-2. OPERATING INSTRUCTIONS
1. To operate transceiver, turn unit ON
by rotating the Volume Control (3)
clockwise until switch clicks,
2. Select desired transmit/receive fre-
quency by sliding Channel-Selector
Switch (7) to desired operating pos-
ition.
3. Check that helically-loaded, flexi-
ble, rubber-clad antenna is properly
connected to transceiver.
4. If transceiver is equipped with the
SA-44 subaudible-tone option, deac-
tivate tone-squelch by pulling the
squelch-control knob OUT to its MON-
ITOR position.
5. Rotate Squelch Control (4) counter-
clockwise until noise is heard in
speaker (6). Adjust Volume Control
for desired audio level; then, re-
adjust Squelch Control clockwise
This manual is for educational purposes only. The accuracy and completeness oUATIL neceiverjust, quiehsenreQO, NOT.
Model:
Genave shall not be liable for any loss or damages.
ECOM-40
Use at your own risk. Unauthorized reproduction is prohibited
Copyright © 2007 Genave/NRC, Ine. All rights reserved
10/80
3-1
This manual is for educational purposes only.
Unauthorized reproduction is prohibited
Copyright © 2007 Genave/NRC, Inc., all rights reserved
ADJUST SQUELCH WHILE A SIGNAL IS BEING
RECEIVED.
6. To activate tone-squeich, PUSH the
squelch-control knob (4) IN~ to its
SQUELCH position (Do NOT turn knob
from position selected in step 5).
7. To transmit, depress Push-to-Talk
Switch (8) and speak into microphone
(6). Release Push-to-Talk Switch to
listen.
NOTE: The carrier-level squelch
circuit, which is adjusted by the
TOP-PANEL squelch control, quiets
the receiver in the absence of an
incoming signal on the assigned op-
erating frequency; however, ANY
station in your vicinity, operating
on this frequency, will be heard.
The SA*44 Subaudible-Tone System is
a tone-activated circuit designed
to squelch receiver audio until a
transmitted signal containing the
oroper subaudible tone is received.
Thus, calls by other licensees who
share the channel will not be heard
unless transceiver is manually set
to its MONITOR position by pulling
squetch knob (4) OUT. Note that the
channel MUST be monitored prior to
initiating a call, to insure that
frequency is NOT in use; if channel
is clear, PUSH squelch knob (4) 1
and proceed to originate call.
8. If an optional, external speaker/
microphone is desired, it may be
connected to Earphone Jack (2) on
unit top panel.
9, To charge internal batteries, plug
charger into Charging Jack (1). Now,
insert charger into 120 VAC, 60 Hz,
receptacle. Be SURE Volume Control
is turned fully counterclockwise to
its OFF position.
Th £ e
ig 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
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.
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.
Note, however, that in many services an
unlicensed person, after having been
authorized to do so by the station li-
censee, may operate from a control
point a mobile, base, or fixed station
or from a dispatch point a base or fix-
ed station, during the course of normal
rendition of service. The minimum class
of operator authorization required for
each specific classification of station
is set forth in the appropriate F.C.C.
rule part.
If this transceiver is to become part
of a new radio-communications system,
it should be included as a portable or
mobile unit on the initial station li-
cense application. Information concern—
ing modification of an existing license
(that is, adding additional portable or
mobile units, or changing transmitter-
type of portable or mobile units) can
be found in the F.C.C. Rules and Regu-
lations governing the service in which
the system is used.
The following technicai information is
intended to aid ECOM-40 users in com-
pleting the application for radio sta-
tion authorization. Only technical data
pertaining to the transceiver are shown
below; all other station particulars
nust be furnished by the licensee.
Copyright © 2007 Genave/NRC, Inc. All rights reserved
fan)
-2 16/56
Model: ECOM-40
The accuracy and completeness of the information provi
; a mati vided herein i
Genave shall not be liable for any loss or damages. Use at your own risk. 7 Nreproduction is gremibived
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 “eetlene @ ioe) ce sie Tain eights doesn reproduction is prohibited.
Type Accepted: Yes Form 405-A may be used in applying for
Type Acceptance/Model No: ECOM-40 license RENEWAL in the Aviation, Public
Type of Unit: Transceiver Safety, Industrial, Land Transportation
Frequency Range (MHz): 143.9 to and Disaster radio services when there
174.0 has been no change, other than mailing
Frequency Tolerance: +,001% address or licensee's name.
Emission: 16F3
Transmitter Input Power: oe For answers to specific licensing ques-
Transmitter Output Power: 1.5 watts ‘tions, contact the Engineer-in-Charge
Approved under Rule Part 22, 74, at nearest Federal Communications Com-
Numbers: 81,87,90 mission Field Engineering Office as
listed below -- they will also supply
the appropriate form(s).
For additional information on filling
out the appropriate application forms, The procedures for obtaining necessary
consult the F.C.C. instruction sheet licenses are found in the Federal Com-
provided with the form. munications Commission Rules and Regu-
lations. These volumes may be purchased
F.C.C. Form 400 and F.C.C. Form 405-A from the Superintendent of Documents,
are normally used to apply for a li- U.S. Government Printing Office, Wash-
cense for the ECOM-40s The Form 400 is ington, D.C. 20402.
used to apply for a NEW station autho-
rization in the Public Safety, Indus- The services and the corresponding
trial, and Land Transportation Radio F.C.C. rule part numbers, under which
Services under F.C.C. Rule Part 90. the ECOM-40 transceiver can be used,
are as follows: =
3-3-1. F.C.C. Rule Part Numbers
Public Mobile Radio Services
F.C.C. Rules & Regulations, Volume VII, Part 22
Domestic Public Land Mobile Radio Service
Rural Radio Service
Private Land Mobile Radio Services
F.C.C. Rules & Regulations, Volume V, Part 90
Local government radio service Subpart B
Police radio service
Fire radio service
Highway maintenance radio service
Forestry-conservation radio service
Medical services Subpart C
Rescue organizations
Veterinarians
Disaster relief organizations
School buses
Beach patrols
Paging operations
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: ECOM-40 10/80 3-3
3-4
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.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.
Private Land Mobile Radio Services (Cont'd)
Power radio service Subpart D
Petroleum radio service
Forest products .radio service
Motion picture radio service
Relay press radio service
Special industrial radio service
Business radio service i
Manufacturers radio service
Telephone maintenance radio service
Motor carrier radio service Subpart E
Railroad radio service
Taxicab radio service
Automobile emergency radio service
Stations on Land in the Maritime Services
F.C.C. Rules & Regulations, Volume IV, Part 81
Public Coast Stations
Marine Utility Stations
Stations Operated in the Land Mobile Service for .
Maritime Purposes
Aviation Services
F.C.C. Rules & Regulations, Volume V, Part 87 =
Civil Air Patrol Stations
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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.
10/80 Model: ECOf!-40
This manual _is for educational purposes only.
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Genave shall not be liable for any loss or damages.
Copyright © 40/8ee Inc. All rights reserved. 3-5
Model: ECOM-40
Use at your own risk. Unauthorized reproduction is prohibited
Genave shall not be liable for “SECT. es
This manual is for educational purposes only.
10 £ d IV... provided herein is not guaranteed or warranted.
seat your own risk.
Unauthorized reproduction is prohibited.
MAINTENANCE MANUAL
4-1. INTRODUCTION
This Section of the maintenance manual
contains theory of operation, alignment
data, and schematics. Lists of replace-
ment parts are given in Section 5 of
this manual.
The Genave Model ECOM-40 transceiver
is a handheld VHF-FM unit designed to
transmit and receive 16F3 emissions in
the various land-mobile or business-
radio services between 143.9 and 173.4
MHz. The instrument supplies a typical
RF power output of 1.5 watts on any of
four possible channels.
the receiver is a dual con-
version superheterodyne employing a 4-
pole monolithic crystal filter. A sin-
gle integrated circuit performs 2nd LO,
mixer, limiter, detection, and squelch
functions.
Basically,
In conjunction with the following cir-
4-2, THEORY OF OPERATION - GENERAL
4-2-1. Power Supply
A self-contained battery pack supplies
power to operate the instrument. This
battery pack supplies 9.6 volts DC, and
uses eight (8) Nickel-Cadmium cells.
The battery pack may be charged, while
installed in transceiver case, by means
of CHARGE jack J102, located on the top
panel of ECOM-40 case. A series diode,
CR106, prevents the "reversed-polarity"
charging of nicad battery pack.
The + TRANSMIT and + RECEIVE voltage
lines are each supplied with 9.6 volts
DC through On-Off switch SW103, Push-
to-Talk switch SW101A, and isolating
choke L211. L110 supplies DC current to
the receiver devices while at the same
time resisting flow of RF currents;
L210 performs the same functions for
the transmitter solid-state devices.
cuit description, refer to the block R105 and CR104 drop the 9.6V supply to
diagram of Figure 4-1, and to trans- 6.8 volts for receiver ICs, IC101 and
ceiver schematic in this Section of the Ic102.
ECOM-40 maintenance manual.
Input Filter] [ar azo Net Mixer! is-Pote {ong Lc, Mixers Liviter,| Audio amp,
hare rts oo 7F* giot ane Q1o2z [pao - surah z | alia 12103
Te = spkr/sic
SP101
¥ SW1O01B
! R Re
To
nog. «| SA-6e {kK
Tone Bd -
‘ist LO/Trip,
C191 YiOT/s184 |
y2a1 Ose/Trip| ist Doubler!
ure 4-1.
This manual is for educational purposes only. Figure. 4- and°completenéss of the™information provided herein is not guaranteed or warranted.
Block Diagram
Genave shall not be liable for any loss or damages. Use at your own risk. Unauthorized reproduction is prohibited.
Model: ECOM-40 Copyright © 2007 ones Inc. All rights reserved. 4-1
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
4-2-2, Push-To-Talk Circuitry
On-Off Switch SW103, located on Volume
Control R118, applies +9.6-volts to the
receiver or transmitter circuitry via
Push-To-Talk Switch SWLOIA, Also P.T.T.
SW1O1A switches antenna between receiv—
er and transmitter circuitry. P.T.T.
Switch SW1O1B connects speaker/micro-
phone SP101 to receiver output when the
switch is in its normal resting posi-
tion, or to transmitter audio input
when switch is depressed.
Isolating chokes L110, 1210, and L211
allow SWLO1A to switch DC and RF cur-
rents simultaneously. In receive mode,
the 9.6-volt supply is applied to Qiol,
Ql02, IC101, IC102, Q103, and Q104
through SW103, L211, SWLOLA, and Li190.
At the same time, the RF signal from
the antenna is applied to the 2-pole,
receiver input filter through C251, SW-
1O1A, and C101. Note that L110 and L211
prevent the incoming RF signal from en-
tering receiver DC circuits.
In the transmit mode, the 9.6-volt sup-
ply is switched to transistors Q201,
Q202, Q203, Q204, and Q205 through Q208
by means of L211, SWIO1A, and 1210.
Simultaneously, transmitter RF output
from the L.P. filter is routed to the
antenna by SWIO1A and C251. Chokes L210
and L211 prevent transmitter RF output
from appearing across the battery pack
or other DC circuitry.
4-3. THEORY OF OPERATION - RECEIVER
4-3-1. Input Filter and RF Amplifier
Capacitor C101 couples the incoming
signal from antenna to the receiver in-
put filter, comprised of C102, L101,
and L102; this filter applies signal to
grounded-gate RF amplifier Q101. The RF
amplifier output is routed to a double-
tuned circuit consisting of L103, C104,
C105, C107, and L104, C108 then applies
the amplified signal to base of Ist
mixer Q102.
4-3-2, lst Local Oscillator/Tripler
Q103, and associated. components form, the
i manu.
Copyright © 2
4-2
acy and completeness of the ?
modified Colpéttsye orystal=controbd edqsneses.
7 Genave/NRC, Inc. All rights reserved
12/80
first local oscillator circuitry. SW-
102A selects proper crystal in the 44,4
MHz to 54.2333 MHz range to produce the
desired injection frequency.
The output circuit of FET tripler Q104
is tuned to three times the crystal
frequency by L109 and C147; then, out-
put of Q104 is capacity-coupled to base
of mixer Q102 by C109. The first LO in-
jection frequency is 10.7 MEz below de-
sired "receive" frequency.
The crystal frequency can be calculated
from the following formula, where Fe, is
the crystal frequency and Fy is the op-
erating frequency:
FE, = (F, - 10.7) / 3
4-3-3. lst Mixer and 4-Polie Filter
The amplified RF input signal and the
LO injection signal are each applied to
the base circuit of mixer Q102. The
10.7 MHz difference signal, produced in
the first mixer, is coupled by T101 to
a 4-pole monolithic crystal filter, FL-
101 and FLLO2. T102 matches the filter
output to lst IF amplifier IC101.
4-3-4. lst IF Amplifier
Integrated-circuit chip, IC10i, and the
associated comperents form the 10.7 MHz-
ist IF amplifier. CRI1O2, across T102,
limits the incoming signal to prevent
overdriving IC101l. T103 tunes output of
IC101 to 10.7 Miz, while ©119 couples
the amplified signal to input of 2nd
mixer in IC102.
4-3-5, 2nd LO, Mixer, Limiter, Detector
and_Squelch
Integrated-circuit IC102 is a multi-
function chip which combines the 2nd
local oscillator, 2nd mixer, limiting
2nd IF amplifier, quadrature discrimi-
nator, active filter and squelch mute
in a single chip.
¥105, C124, and C125, together with IC-
102 pins 1, 2, and 4, form an internal-
ly biased Colpitts-type oscillator. The
collector, base and emitter connec-
Use at your own risk. Unauthorized reproduction is prohibited
Nedel: ECOMN-40
nformatio® provided herein is not guaranteed or warranted
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.
tions are at pins 4, 1, and 2 respec-
tively. Low-side injection is used;
therefore, the crystal frequency is 455
kHz below the 10.7 MHz IF, or, 10.245
MHz. :
The mixer-oscillator portion of I¢102
down-converts the 10.7 MHz input fre-
quency to 455 kHz. T105 tunes the mixer
output to 455 kHz, and also functions
as an external bandpass filter. From
T105, the signal is routed to input of
a five-stage limiter at pins 5 and 6 of
IC102. The output of the limiter at pin
7 drives a multiplier, both internally
directly, and externally through the
quadrature coil T104, to detect the FM
signal.
The recovered audio is filtered and
buffered internally in I1C102, then ap-
plied to pin 9. From pin 9 on IC102,
the audio signal is applied to a de-en-
phasis network consisting of R112 and
C127; then the signal is routed through
the SA-44 tone board (if used) to audio
volume control R118.
Pin 9 also routes the recovered audio
to input (pin 10) of a bandpass active
filter, which consists of an internal
op-amp and external components R113,
R114, C128, and C129. Pin 11 applies
noise output from the filter to exter-
nal AM detector CRI05, which detects
noise ABOVE normal voice audio band.
The absence of an input signal results
in considerable noise above the desired
audio frequencies; whereas, an incoming
signal greatly reduces the noise level.
R115 connects the NEGATIVE output of
CR105 to IC102 pin 12.
Squelch potentiometer R110 selects and
applies an external POSITIVE bias to
Icl02-pin 12 to set squelch-trigger
circuit so that audio-muting switch
(pin 14) is an OPEN circuit; this re-
moves ground from pin 1 of audio output
IC103 which then turns ON and operates
normally. When NEGATIVE output of CR105
pulls IC102 pin 12 below 0.7V, pin 14
is internally grounded; this grounds
pin 1 of audio output IC103 which turns
OFF and squelches receiver.
This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Use at your own risk. Unauthorized reproduction is prohibited.
Genave shall not be liable for any loss or damages.
Thus, with NO input signal, a large
noise voltage is applied to CR105. The
resultant NECATIVE DC voltage is ap-
plied to IC102 pin 12 where it combines
with the POSITIVE voltage supplied by
squelch control R110. With a normal
setting of the squelch control, the de-
tected noise voltage pulls pin 12 down
‘toward OV causing pin 14 to short to
ground -- thus squelching receiver.
With an incoming signal above squelch
level, a reduced noise voltage is ap-
plied to CRIO5. The detected noise
voltage is again applied to IC102 pin
12, but does NOT have sufficient ampli-
tude to hold pin 12 below 0.7V; there~
fore, the ground is removed from IC102
pin 14 -- thereby unsquelching the
receiver.
4-3-6. Audio Output
The audio signal, attenuated by volume
control R118, is applied to pin 2 of
audio output 1C103. _
R119 and C134 set gain of the ampli-
fier, while C138 and R120 are used to
prevent high-frequency oscillation of
the amplifier.
NOTE: A ground applied to pin 1 of
IC103 (by pin 14 of IC102) disables
the output stage to mute receiver.
The reactance of speaker SP101 and C137
provide low-frequency roll-off of the
audio output.
4-4, THEORY OF OPERATION - TRANSMITTER
4-4-1. Speech Amplifier/Limiter/Filter
In TRANSMIT mode, output of SPI101 is
applied to a common-base amplifier,
Q201. From Q201, the voice signal is
coupled to common-emitter amplifier Q-
202. Q201 and Q202 amplify the micro-
phone output, as well as providing pre-
emphasis of the voice signal.
It is necessary to limit the peak am-
plitude of the audio signal applied to
the modulator, so that deviation of the
FM transmitter will not exceed the pre-
Copyright © 2007 Genave/NRC, Inc. All rights reserved.
Model: ECOM 40H 12/80
4-3
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.
set value. Q203 performs the limiting
function in the ECOM-40H transceiver.
The limiting process produces high-
order harmonics which, if allowed to
pass through to the modulator stage,
would create unwanted sidebands. There-
fore, an audio low-pass filter, Q204
and associated components, is used at
the output of the limiter to provide a
-18 dB per octave rolloff above 3 kHz.
R215 sets the maximum voice modulation
deviation.
4-4-2, Voice/Subaudible-Tone Modulator
C213 couples audio from the speech am-—
plifier to the modulator circuitry,
consisting of varactor CR202 and asso-
ciated components.
If the subaudible-tone option is in-
stalled in the transceiver, R221 con-
nects subaudible-tone output from the
SA-44 tone board to varactor modulator
CR202.
Audio voltages applied to varactor CR~
202 cause the diode capacitance to vary
at an audio rate; therefore, since CR-
202 is connected between the common
crystal line and ground, any change in
diode capacitance will result in the
crystal frequency changing by a few
Hertz. The crystal frequency multiplies
12 times to reach the output frequency;
thus the crystal frequency only has to
shift approximately 400 Hz’ for 5 kHz
deviation.
4-4-3, Transmit Oscillator/Tripler
Q205 and associated components form a
modified Colpitts, ecrystal-controlled
oscillator. The crystal frequency is
multiplied 12 times in the transmitter
stages. A 4-position, slide switch, SW-
102B, selects proper crystal in the
11.99 MHz to 14.45 MHz range to cover
operating frequencies between 143.9 and
173.4 MHz.
Variable capacitors are used in series
with each crystal to allow exact set~
ting of the generated frequency. Ther-
mal stabilization is provided by means
of C225 and C226. Their temperature co-
efficient compensates the oscillator
eircuitry to maintain +.001% frequency
stability over the temperature range.
Crystals are specified to +.001% over
the temperature range from -30°C to
+50°C.
L202, C228, and C230 tune collector
circuit of Q205 to three times the
crystal-oscillation frequency and match
collector of Q205 to base of Ist dou-
bler, Q206.
4-4-4, 1st Doubler
Q206 is a Class C doubler stage,
another silicon, NPN transistor.
using
L203, C232, L204, C233, and C234 tune
output of lst doubler to the 71.94 to
86.7 MHz frequency range (6 times the
crystal frequency), and also match col-
lector impedance of Q206 to input of
2nd doubler, Q207.
4-4-5. 2nd Doubler
Q207 is another Class C doubler stage,
using a silicon, NPN transistor. Q207
performs the final frequency multipli-
cation, as well as providing sufficient
power to drive the final RF amplifier.
L205, C237, C238, L206, C239, and C240
tune output of 2nd doubler to the 143.9
MHz to 173.4 MHz frequency range (12
times the crystal frequency), and also
match collector impedance of Q207 to
input of power amplifier, Q208.
4-4-6. Power Amplifier
Class C power amplifier Q208 amplifies
the RF signal to provide a power output
of approximately 1-1/2 watts.
L208 and C244 match the collector im-
pedance of Q208 to the 50-ohm antenna
impedance. C245, C247, C246 and L209
form an elliptic-function, lowpass fil-
ter which reduces level of all spurious
outputs above the operating frequency
to at least 46-dB below the carrier
level. The filter output is connected
to the antenna via push-to-talk switch
This manual is for educational purposes only. The accuracy and complet athe Z rn } i i i
Genave shal aot’ be Liable £52 any ioss oe /danages” USWLQLA,, aug" DE? BLOCK Ing -icapac thor E25 kysenes
Copyright © 2007 Genave/NRC, Inc. All rights reserved.
4-4 12/80 Model: ECOM-40
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.
4-5. DISASSEMBLY 3. Lift cover up and off transceiver.
Prior to performing any service work on 4-5-2. FRONT Cover Removal
the instrument, the plastic BACK cover
must be removed, This will allow bat-— 1. Imscrew the antenna from its 8-32
tery pack to be replaced, TRANSMIT fre- threaded mounting stud; then, use
quency(ies) to be adjusted, or SA-44 _ 0.050" Allen wrench to loosen two
Tone Board to be serviced. Any further setscrews in each control mob. Re-
work will necessitate removing plastic move both knobs.
FRONT cover also.
2. Remove BACK cover as given above to
The transceiver covers are easily re- gain access to PC-board mounting
moved; refer to Figure 4-2 and proceed screws.
as follows: (DO NOT BUMP OR MOVE XMIT
CRYSTAL TRIMMERS AT BOTTOM, RH-SIDE OF 3. Disengage battery connector from its
PC BOARD). mating connector; then, remove bat-
tery pack from ECOM-40 Transceiver.
4. Remove two #4-40 pan-head machine
screws (Figure 4-2, item "B") which
secure PC board to FRONT cover.
5. Place hand across open back-side of
transceiver. Carefully grasp unit
and turn it over. The PC-hoard may
drop into the palm; but if it does
not, push gently on channel-selector
switch. Hold PC-board, while sliding
FRONT cover off over jacks and con-
trol shaves.
CAUTION: The speaker/microphone is
simply lying in position on the PC
board - DO NOT drop speaker or dam- ~
age leads.
4-5-3. SA-44 Tone-Board Removal
1. Remove BACK cover from transceiver
as outlined in Section 4-5-1 above.
2. Grasp SA-44 tone board by its edges
and, with a slight rocking motion,
lift tone board away from main PC
board until tone board clears the
Figure 4-2. Disassembly seven connecting pins.
4-5-1. BACK Cover Removal 3. If service work, such as component
replacement, is to be performed on
1. Carefully lay transceiver on its SA-44, it is necessary to remove
FRONT on suitable work surface. Be phenolic insulator from foil side of
SURE unit is turned OFF. tone board. The phenolic insulator
is secured to tone board with RTV;
2. Remove two #4-40 x 1" pan-head ma- thus, the insulator can be easily
miehine iscrewsawhichnsecure. ba eckueover completenesPQeOhedn EE On tone.beanrd:. rand.aZecwSedarrantea.
Genave shall yot be liable, for any loss Ey ages. Use at your own risk. Unauthorized reproduction is prohibited.
to transceiver (Fig. -2, captna@pnt OAV} Genave/NRC, Inc. All rights reserved. zt
Model: ECOM-40 3/81 4-5
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.
Copyright © 2007 Genaye/ NRE 1n6 all rights reserved.
4-6. UNIT REASSEMBLY
As a general rule, items are reassem-
bled on the ECOM-40 transceiver by re-
versing the disassembly procedure. How-
ever, a few points require special at-
tention.
4-6-1. FRONT Panel
1. Place the PC board, foil side down,
on the palm. Lay speaker/microphone
in proper position on the PC board,
with its magnet resting on PC board
(some boards may have "guide pins"
installed to facilitate the speaker
placement on PC board).
2. Rotate speaker so that its two sol-
der terminals face in the general
direction of the Charging Jack. Be
sure speaker terminals DO NOT short
against resistor leads or coils;
then check routing of speaker wires
to insure they will not be pinched
when mounting screws "B" or "A"
(Figure 4-2) are installed.
3. Align holes in top panel with con-
trols and jacks on PC board; then,
carefully slide FRONT cover into
position. BE SURE Push-to-Talk but-
ton is in its normal-resting posi-
tion (NOT depressed), otherwise the
P,T.T. switch may be damaged.
Turn transceiver over on its front
side and be sure PC board is fully
seated in FRONT cover. Now install
two 4-40 machine screws (Figure 4-2,
item "B"),
i
4-6-2. SA-44 Installation
1. Note that phenolic insulator is in
position on foil side of SA-44 Tone
Board. This insulator is essential
to prevent shorts between the tone
board and the main-board circuitry.
2, Align the seven socket pins on tone
board with the corresponding male
pins on transceiver main board. Push
tone board down on pins until the
phenolic insulator rests against the
main board.
eck component side of tone board
for a block of foam material design-
ed to press against unit BACK cover
and thus hold tone board in place.
4-6-3. Battery Pack Installation
1. Turn Volume Control fully counter-
clockwise to the OFF position.
2. Lay nicad battery pack on rear of
transceiver main PC board, with the
foam material toward PC board. The
battery pack SHOULD NOT rest against
SA-44 Tone Board.
3. Connect battery-pack to mating con-
nector which is attached to ECOM-40
main PC board. BE SURE BACK COVER
WILL NOT PINCH BATTERY WIRES.
4-7. ALIGNMENT PROCEDURE - GENERAL
The unit is properly aligned when ship-
ped from the factory, and realignment
should never be necessary during normal
life of the unit unless components are
replaced within the instrument. In con-
junction with the following alignment
instructions, refer to the Component
Location Diagram in this Section of the
manual for location of the adjustment
points.
Never attempt to realign circuitry of
the unit unless test
fied for each section is available.
4-7-1. Preparation for Alignment
1. Remove LACK and FRONT covers as ex-
plained in Section 4-5, so that com-
ponent side of PC board is acces-
sible. For ease of test equipment
connection, a female BNC connector
may be soldered temporarily to the
antenna connector copper-pad area &
the adjacent ground area. See Figure
4-3.
2. Power may be supplied by either a
fully charged 9.6V battery pack, or
a regulated bench supply capable of
1 Amp at 9.6 volts. CAUTION: Observe
correct polarity of power supply.
equipment speci-
—
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.
4-6
Model: ECOM-40
This manual is for educational purposes only
a ANT. STUD &
BRACKET
ANT. CONN.
PAD
TEMP BNC
}
é
‘
GRND PAD
ECOM-40° PC
BOARD
©
Figure 4-3. Temporary Ant. Conn.
3. To facilitate transceiver test and
alignment, the SA-44 tone board (if
used) can be temporarily removed and
a jumper wire substituted to con-
plete audio circuitry from "Det.
Audio" pin to "Audio to Vol. Cont."
pin on ECOM-40 PC board. Refer to
Component-Location drawing in this
Section for pin locations.
NOTE:
board
only)
The SA-44 subaudible tone
(receive "decode" function
can also be disabled by mov-
ing squelch override switch to its
MONITOR position; in this event,
the transmit “encode" will still be
functional. In the first 100 trans-
ceivers built, the MONITOR position
was with squelch knob turned fully
CCW until switch operated; however,
this also disabled the carrier lev-
el squelch. The squelch control was
replaced by a unit having a push-
pull switch, in which the squelch
knob is pulled OUT to MONITOR. This
allows the carrier-level squelch to
operate, if desired, while the tone
squelch is disabled.
The accuracy-and completeness of the information provided herein is not
i mati i in i waranteed
Genave shall not be liable for any loss or damages. 7 eeconipivea
Copyright © 2007 Genave/NRC, Inc.
Use at your own risk. Unauthorized reproduction is prohibited
all rights reserved
4-8. ALIGNMENT PROCEDURE - RECEIVER
1. Connect unit to 9.6V supply -- See
CAUTION note above in step 2.
NOTE: To prevent accidental keying
of transmitter during the receiver
tests, temporarily short base of Q-
- 205 to ground.
2. Couple frequency counter to first
LO coil L109 with a “pick-up” loop.
Turn unit ON, and adjust each re-
ceive crystal to its proper frequen-
cy with the appropriate crystal net-
ting trimmer. See Figure 4-4.
Figure 4-4. Crystal & Trimmer Locations
NOTE: The crystal frequency is cal-
culated as follows:
F. = (Rec. Freq. - 10.7) + 3, +,001%
Turn unit OFF,
counter.
and remove frequency
Place channel-selector switch to ANY
working channel position. This will
be the test frequency.
5. Connect scope and SINAD-measuring
equipment to unit speaker terminals.
6. Connect FM signal generator to an-
tenna-input connector; then, set the
generator on desired "receive" fre-
quency, and modulate generator with
a 1-kHz tone at +5 kHz deviation.
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.
Copyright © 2007 Genave/NRC, Inc.
Model: ECOM-40
Use at your own risk. Unauthorized reproduction is prohibited
All rights reserved
3/81 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.
7. Turn unit ON, adjust squelch fully
counterclockwise, adjust rec. vol-
ume control and generator RF output pF capacitor to base of mixer Q-
level to usable range of the SINAD- 102; however, if generator covers et
measuring equipment. . the operating frequency, sweep sig-
nal can be applied directly to the
NOTE: During alignment, the volume antenna-input connector.
control and generator-level controt ;
should be adjusted as necessary to c) Set generator sweep width for ap-
avoid over-driving unit. proximately 25 kHz at a sweep rate
of NOT MORE than 40 Hz. During the
8. Adjust C102, L103, L104, L109, T101, alignment of T101 and 7102, keep
T102, T103, 1104, and T105 for best generator output low enough to pre-
SINAD reading. vent overdriving the detector.
9. Touch up T7104 for maximum undistort- d) Turn unit ON, and adjust 1101 and
ed sinewave on scope. Repeat steps 7102 for a bandpass response simi-
8 and 9 until no further improvement lar to Figure 4-6. Ripple should be
is obtained. Turn unit OFF, and dis- NOT MORE than 2 dB, and is gener-
connect test equipment. ally 1 dB or less.
NOTE: An alternate (and preferred) NOTE: After crystal filters have
method of adjusting T1101 and 7102 been properly aligned using a swept
(10.7 MHz crystal filters FL101 and signal, do NOT change adjustments
FL102) is by using a sweep genera- of T101 or 7102.
tor, detector, and oscilloscope as
explained below:
2 4B Y
10. To sweep T101 and 1102, proceed as Max, Ripple =
follows: 7
a) Connect detector input (Figure 4-5)
to pin 5 of IF amp. IC101; connect
detector output to scope vertical
input. Set scope vert. sensitivity
to give a usable pattern with min-
imum sweep-generator input.
Figure 4-6. IF Response
35:
< 1E nse iN ] > 11. Turn unit OFF, and disconnect test
ae } a. equipment.
el ae Bice TT WERT: INEUT
| | 4-8-1. RF Input for 20-dB Quieting
+—>
1. Connect FM signal generator to unit
antenna-input connector, and connect
AC voltmeter to speaker terminals.
Pigure. S-S< Uighainpedaice Pateeker 2. Turn signal generator modulation OFF
and set generator RF attenuator for
zero output. (Generator must have
of generator being used -- if gen- neqligible leakage). Set _ generator na
erator covers 10.7 MHz, the sweep to desired "receive" frequency.
mess TUNA T Cate BE CaMAL eH ee NEOUCI a co cs ce veer Ges cise onacthorinea cesronotion ie seni
Copyright © 2007 Genave/NRC, Inc. All rights reserved. 2
4-8 3/81 Model: ECOM-40
b) Connection point for sweep-input
signal depends upon frequency range
This manual is for educational purposes only.
Genave shall not be liable for any loss or damages.
3.
4,
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.
Adjust transceiver volume control so
that receiver background noise indi-
cates -10 dB on the AC voltmeter.
Slowly increase setting of generator
RF attenuator, until AC voltmeter
indicates -30 dB. Note RF level in-
dicated on signal generator attenu-
ator. This is the RF input required
to produce 20 dB receiver quieting.
An input of -109 dBm (0.8 uV) will
quiet receiver 20 dB.
4-8-2, Squelch Operation
1.
2.
3.
4.
Set generator to desired “receive”
frequency, and set modulation for a
1 kHz tone with +5 kHz deviation.
Set RF attenuator for zero RF out-—
put.
Turn volume control to full volume;
now, rotate squelch control fully
cew (squelch OFF), and then rotate
squelch control slowly cw until unit
just squelches. The receiver should
now be completely silent (no RF sig-
nal input).
Increase setting of signal-generator
RF attenuator until receiver squelch
just fully opens. The RF attenuator
should read no higher than -113 dBm
(0.5 uV).
With no RF generator input, adjust
receiver volume to maximum, and ad-
just squelch control fully clockwise
(full squelch). Increase signal gen-
erator output level (modulated with
1 kHz tone at +5 kHz deviation) un-
til squelch just opens. The signal
generator attenuator should read no
more than 2.0 uV.
4-8-3. Audio Output Power
1.
26
Set FM signal generator on desired
receive frequency, and set modula-
tion for +5 kHz deviation using 1
kHz audio. Set RF attenuator in the
vicinity of 5 uV.
Turn receiver volume control fully
clockwise. The AC voltmeter, connec-
ted to speaker terminals, should in-
Tats doped te ATES:
ha s InP acy and completeness of the i
Genave Ress Het eae 28 woitsa damages.
Use at your own
3, Set signal generator For +5 kHz de-
viation using 500 Hz audio, and note
that AC voltmeter indicates at least
1.8 volts with unit volume control
fully clockwise.
4. Set signal generator for +5 kHz de-
viation using 3 kHz audio. Again the
AC voltmeter should indicate at
least 1.8 volts at maximum setting
of the transceiver volume control.
5. If base of transmit oscillator Q205
was shorted to ground during receiv-
er alignment, remove this short.
6. If SA-44 tone board was removed in
step 3 of Section 4-7-1, remove jum-
per and re-install tone board.
NOTE: If any adjustments are needed
for tone board, refer to the SA-44
Maintenance Manual.
4-9. ALIGNMENT PROCEDURE ~ TRANSMITTER
4-9-1. Preparation for Alignment
1. Refer to Section 4-7-1 in this Sec-
tion of Maintenance Manual.
2. Attach a 50-ohm power meter, or a
relative output indicating device
{Figure 4-7), to transceiver antenna
connector.
mt 47
TL = _ hanes eee i} {70 $0 OWM LOAD
Ficure 4-7. Relative Output Indicator
3. Preset deviation potentiometer R215
to its lowest setting, by rotating
it fully CLOCKWISE, as viewed from
component side of ECOM-40 PC board.
formation provided herein is not guaranteed or warranted.
sk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, Inc. All rights reserved.
Model: ECOM-40
3/8) 4-9
4-
Es
Be
bs
dw
No
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.
9-2. Frequency and Power Alignment
NOTE: The peak voltage measurements
in following steps of this Section
are made with an RF VTVM. Key the
transmitter ONLY when adjustments
are being made.
Place channel-selector switch to an
operative channel.
Connect VIVM RF probe to base of Q-
206 and key transmitter. Adjust 1202
for a peak voltage indication on the
VTIVM.
Move RF probe to base of Q207. Key
transmitter and adjust slugs in L203
and 1204 for a peak reading on VTVM.
Move RF probe to base of Q208. Key
transmitter and adjust L205 and 1206
for a peak voltmeter reading.
Remove RF probe. Key transmitter
and, using the 50-ohm power meter or
relative output device, adjust 1208
for a maximum output indication.
Touch-up tuning of L202, L203, L294,
L205, L206, and L208 for a maximum
indication on the power or rel. out-
put indicator.
9-3. Transmit Crystal Installation &
Frequency Netting
Refer to Figure 4-4 for crystal and
netting capacitor locations (T).
NOTE: TRANSMIT crystals are mounted
on component-side of transceiver PC
board, while the netting trimmers
are mounted on foil side of board.
With a crystal installed and channel
switch in corresponding position,
connect a frequency-indicating de-
vice to transceiver --- either by
loop coupling to final power stage
or, by connecting to jack on rela-
tive output device (Figure 4-7).
Key transmitter, and adjust appro-
priate crystal-netting capacitor for
correct frequency.
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, Repeat steps 2 and 3 for each crys-
tal installed in transceiver.
4-9-4, Power-Measurement Procedure
1. Key transmitter, and note RF power-
output reading. Typically, the power
should be approximately 1.5 watts on
‘each channel installed in unit.
4-9-5. Subaudible-Tone Deviation
Adjustment (If Used)
1, Connect unit to relative output in-
dicating device (Figure 4-7); then,
connect a Deviation Meter to "Freq.
Counter/Deviation Meter" output of
the relative output indicator.
2. Adjust FREQ potentiometer, R401, on
SA-44 board for desired subaudible
tone as given in SA-44 Service Man.
3. Key transmitter, and adjust S.A. DEV
potentiometer, R405, on SA~44 for a
deviation of +1 kHz as shown on De=
viation Meter.
4-9-6. Carrier Deviation Adjustment
1. Preset DEVIATION-level pot., R215,
by rotating it fully CW as viewed
from component-side of main board,
and then backing pot. off approx.
1/4 turn.
2. Key transmitter, and feed a 1700 Hz
tone into transceiver microphone.
Watching Deviation Meter, increase
audio tone (1700 Hz) level until no
further increase in deviation is in-
dicated, The modulator stage is now
saturated.
3. Key transmitter, and adjust DEVIA-~
TION potentiometer, R215, fora +5
kHz reading on Deviation Meter.
NOTE: If ECOM-40 is equipped with
SA-44 Tone Board, the +5 kHz devia-
tion consists of the combined 1790
Hz audio and the subaudible tone;
whereas, if SA-44 is NOT used the
+5 kHz deviation is due ONLY to the
1700 Hz audio tone.
Copyright © 2007 Genave/NRC, Inc. All rights reserved.
4-10
3/81
Model; ECOM-40
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, Turn transceiver OFF, and disconnect 4, To bring the receive crystal(s) “on
all test equipment. Replace front frequency," perform steps 2 and 3
cover, install battery pack, and re-— given in Section 4-8 of this manual.
place rear cover.
5. To adjust transmit crystal(s) "on
4-10. FREQUENCY CHANGES frequency," perform steps 1 through
4 given in Section 4-9-3 of this
Installation of new frequencies in this manual.
transceiver can be easily accemplished
by performing the following steps: NOTE: If new frequencies differ ap-
preciably from original alignment
frequencies, it may be necessary to
completely re-align transmitter and
NOTE: To aid in obtaining
crystals for the ECOM-40, c
crystal specifications are given in receiver circuits as detailed in
Section 4-11 of this manual. Sections 4-8 and 4-9,
1. Remove BACK and FRONT covers from 4-10-1. Large Changes in Frequency
ECOM-40, as explained in Section 4-5 ~
of this manual. If new frequency differs from original
e
alignment frequency by 6 MHz or more,
2. Locate mounting position for = it will probably 5e necessary to re-
crystal(s). Refer to Figure 4 place one or two coils and three capac-
TRANSMIT and RECEIVE crvstal loca- itors in receiver front-end. Then unit
tions. should be re-aligned, as given in Sec-
tions 4-8 and 4-9.
NOTE: When installing new crystals,
BE SURE that transmit and receive Refer to Table 4-1 for component values
crystals are properly paired. norna usec for different frequency
ranges in the ECCMN-4+o receiver.
3. Insert leads of new crvs
appropriate holes in PC 30 then, NOTE: As civen in Section 1-3, the
carefully solder leads to copper maximum separation between highest-
pads on back (foil) side of board. and lowest-frecuency channels in-
stalied in the ECOM-49 is 2 MHz.
NOTE: Crystal leads MUST 3E trimmed
close to PC board, to prevent then
from cutting into battery pack.
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: ECOM-49 3/8] 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.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.
TABLE 4-1. COMPONENT CHANCES
Receiver
MHz
Component Range 144-150 151-158 159-165 166-174
L101 1800116 1800116 1800105 1800105
(44T) (45T, (3457 (35T)
spread)
L104 1800308 1800308 1800308 1800304
(8%T) (847) (847) (447)
C104 1.8 pF 1.5 pF 0.82 pF 0.47 pF
C107 0.82 pF 0.56 pF 0.22 pF 1.5 pF
C147 6.8 pF 6.8 pF 4.7 pF 3.9 pF
—
—
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.
4-12 3/81 Model: ECOM-40
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. CRYSTAL SPECIFICATIONS
To change a transmitter and/or receiver
operating frequency in a Model ECOM-40
transceiver requires that a new trans-
mit and/or receive crystal be installed
in the unit. The transceiver may also
require some realignment to insure
proper operation of the new frequency.
Crystals for the ECOM-40 VHF transceiv-
ers are available from the factory at
nominal cost by calling the factory
"Parts Department," and specifying the
model number, desired operating fre-
quency, and whether for transmit or re-
ceive. Crystals may also be obtained
from other sources; therefore, the in-
formation necessary for ordering these
crystals is given below:
Transmit Crystals
Parallel Mode:
Fundamental Cut, Tolerance:
Temperature Range:
Holder:
Crystal Frequency:
Series Resistance:
Genave Part Number
Cy = 32 pF
+,001% max. calib. tol. 825°C +1°C
+.0005% max. drift over temp. range
0° to +50°C
HC-25/U
(Operating Freq.) = 12
25 ohms, maximum
2300211 (Spec. Freq. )
Receive Crystals
Parallel Mode:
3rd Overtone, Tolerance:
Temperature Range:
Holder:
Crystal Frequency:
Series Resistance:
Drive Level:
Genave Part Number:
This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
1 Use at your own risk. Unauthorized reproduction is prohibited
Copyright © 2007 s7ey Inc. All rights reserved. id 4-13
Genave shall not be liable for any loss or damages.
ECOM-40
oy =m mpi
+.001% max. calib. tol. @25°C +1°C
+.001% max. drift over temp. range
-30°C to +60°C
HC-25/U
(Operating Freq - 10.7 NHz) + 3
40 ohms, maximum
One mv
2300226
This manual is for educational purposes only. The accuracy and completeness of the information provided herein is not guaranteed or warranted.
4-12, COMPONENT LAYOUT AND STHEMAT EG rrlone’s 2007 cenave/nne, incky ali rights reserved: “sPnouuction 2s prohibited.
Figure 4-8. ECOM-40 PC Board Component Layout.
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.
evar ® 2007 Genave/NRC, Ine. All rights reserved. Made]: ECOM-40
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.
R2TE870R
vA
R207
ik
R208
| 1OOK
4
FEEOTHRUS
© tase
a 75Pe |
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.
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.
Rees ~Gopyright ©_2007 Genave/NRC, Inc., all rights reserved.
A> TOS cS oe
Pe
SPKR VU AND Z
JUMPERS WTS x
ADD JUMPERS, M AND N
INSTALL 104
J103
. ICRI? Z20a Z20S 2206 2207 | RQ ~
aaa ee
i {
{
| |
‘ c250 1 | =
| ail cer ket
i 180 = ! OY aT ax
is | u a
i | =
NoTe 4.
6247, 82
NOTES:
STERNAL SPAR;
NTERNAL AP KAJ MIC =,
SATERNAL
ce MC
ERNAL MXCTANOTERTERNGL
8? L203 ; Lele | +—+—
pacers | H SPTIONAL SU0IG WIRING
MIC
4. ©CR OPTIONAL w
S FOR CPTIONAL aUcIO
OR" NTERNAL SPAR A:
ERTEHNAL,
EXTERNAL SPKR“AN2 EXTEANAL Wt
KEMOTE SPARIMIC iT NEMOTE
V JUMPER F $A-a4 N07
“auDId TC VOL.CONT.
Saas] cag. C248 REFER TO EcCm 40
sv T se 1G.4- Tart Ai “0
oH et iad H 3 OBTAIN OPTIONAL FLNCTIONS.
1
----0 SUSAUD BLE TONE OG MOD.
SA-44 TOME 39
Swl04
Figure 4-9. ECOM-40 Transceiver Schematic
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: ECOM-40 Copyright © 2007 Genave/NROR FEF] All rights reserved. 4-15
This manual is for educational purposes only.
Genave shall not be liable for any loss or damages.
Copyright © 2007 Genave/NRC,
ECOM AUDIO WIRING
SEE
SHEET
NO. 1
ure 4
fils wonval Ja ‘rae, oovedtbl
4-16
purposes onl
Genave shall not be liable for au deen or damages”
SW IO1B
SEE
NOTE BL =
Copyright © 2007 Genave/NRC,
INT SPKR/MIC
SP10t
EXT MIC
J104
Inc.
Use at seue orn = sk.
Inc.
Use at your own risk.
All
rights reserved.
P103
Pi04
The accuracy and completeness of the information provided herein is not guaranteed or warranted
Unauthorized reproduction is prohibited
NOTES:
A.
B.
FOR REMOTE SPKR/
SHELL OF MIC JACK
IS USED TO KEY R
FOR REMOTE KEYIN
1S REPLACED BY A
= 10. Remote Beads Microphone, and PTT Wiring
teness of the
information provided herein is not guaranteed or warranted.
rights reserved.
Unauthorized reproduction is prohibited.
Model:
ECOM-40
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.
OTE
IC/PTT
ss |
‘MIC WITH REMOTE KEYING, THE
Jl04 1S NOT GROUNDED BUT
ELAY KIO},
GaPTT SWITCH SWIOl (A&B)
DPDT RELAY KIO,
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.
This manual is for educational purposes only
Copyright © 2007 Genave/NRC, Inc.
4-13. ECOM-40 DC VOLTAGES
4-13-1. Receiver Voltages
a) Channel-Switch set to any operative channel.
b) No signal input.
c) P.T.T. Switch in "Rec." position.
d) Unit connected to 9.6V supply.
e) Voltages measured with 10 Meg. input VTVM.
f) Voltages may vary +20%.
IC-101
Q101 D - 9.0V Pin-1 2.6V
S - OV 2 - OV
G - OV 3 - 2.6V
4-0
Q102 E - OV 5 - 6.4V
B- 0.7V 6 - 6.4V
C - 9.2V 7 - 6.4V
8 - OV
Q103 E - 4.4V
B - 5.0V
C - 7.2V
Qq1o4 D - OV
S - 7.2V
G - 7.4V
4-13-2. Transmitter Voltages
a) Channel-Switch set to any operative channel.
b) P.T.T. Switch in "Xmit" position (depressed).
c) Unit connected to 9.6V supply.
d) Voltages
measured with 10 Meg. input VTVM;
detector used to measure 9206, Q207, & Q208.
Q201 — - 0.1V Q205 E - 4.0V
B - 1.0V B - 3.4V
C - 1.0V Cc - 9.2V
Q202 E - OV Q206 E - OV
B - 0.8V B - 2.3V
C - 2.0V C - 15.0V
Q203 E - OV Q207 E - OV
B - 0.8V B ~ 3.5V
C - 2.6V C - 10.5V
Q204 E - 3.6V Q208 E - OV
B - 2.5V B - 1.6V
Cc - OV C - 23.0V
Detector
The accuracy and completeness of the information provided herein is not gu
i mati i in i aranteed or warranted.
Genave shall not be liable for any loss or damages. Use at your own risk. 2
Unauthorized reproduction is prohibited
1C-102 IC-103
Pin-I - 6.4V Pin-1 - 1.6V
2 - 5.8V 2- OV
3 - 6.4V 3 - OV
a - 6.4V 4- Ov
5 - 1.2V 5 ~ 4.8V
6 - 1.2V 6 - 9.5V
7 -1.2V 7 - 4.8V
8 - 6.4V 8 - 1.5V
9 - 2.0V
10 - 2.2V
11 - 2.6V
12 - 1.2V
13 - ov
14 - 1.6V
15 - ov
16 = 2.2V
.001
-—— +
To
Znput .001 vTVM
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.
Copyright © 2007 Genave/NRC, Inc.
Model: ECOM-40 3/81
All
Use at your own risk. Unauthorized reproduction is prohibited
rights reserved.
4-17
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.
4-14, SPEAKER/MIC. WIRING OPTIONS
4-14-1. Optional External Speaker/Mic.
Standard audio wiring for the ECOM-40
utilizes INTERNAL speaker/mic., SP101.
Plugging an EXTERNAL speaker/mic. into
J103 disables the internal unit. Note 1
on the Schematic (Figure 4-9) depicts
these audio connections, while Figure
4-8 shows physical location of jumpers
and jacks.
4-14-2. Optional Ext. Speaker/Earphone
This option utilizes INTERNAL speaker/
mic. SP101, until an EXTERNAL speaker
or earphone is plugged into jack J103;
then, reception is by means of the ex-
ternal unit, while the internal unit
serves as the microphone. Note 2 on the
Schematic (Figure 4-9) illustrates the
speaker/mic. connections, while Figure
4-8 shows physical location of jumpers
and jacks.
4-14-3, Optional Ext. Microphone
This wiring option uses the INTERNAL
speaker/mic., SP101, until an EXTERNAL
microphone is plugged into jack J104.
The internal unit then functions as the
speaker, while the external unit be-
comes the microphone. Note 3 on ECOM-40
Schematic (Figure 4-9) gives audio wir-
ing connections, while Figure 4-8 shows
physical location of jumpers and jacks.
4-14-4. External Earphone and/or Mic.
Again, this wiring utilizes INTERNAL
speaker/mic. SP101, if earphone jack J-
103 and mic. jack J104 are NOT used. An
earphone or speaker may be plugged into
J103 for reception, while the internal
unit functions as the microphone. If
desired, an external microphone can be
plugged into J104, while the internal
unit functions as the speaker. One of
the more practical uses for this option
is -with a headset having an attached
boom microphone; the headset is plugged
into J103 and the microphone is plugged
into J104.
Note 4 on the Schematic (Figure 4-9)
depicts these audio connections, and
Figure 4-8 shows physical placement of
jumpers and jacks.
4~14-5, Optional Ext. Speaker/Mic/PTT
With this option the INTERNAL speaker/
mic., SP101, performs the usual receive
and transmit functions if headset jack
J103 and mic. jack J104 are NOT used.
Basically, this option is designed to
provide remote speaker, microphone, and
push-to-talk operation, with a minimum
number of connecting wires, while the
transceiver is carried in a belt mount-
ed holster. The speaker or earphone
plugs into J103 and the microphone/PTT
plugs into mic. jack J104. The normal
PTT switch SW101 MUST BE replaced by
DPDT relay K101. An auxilliary PTT
switch can be added to ECOM-40 case, if
desired.
Note 5 on Schematics
4-10) shows the audio wiring required
for this option. Figure 4-8 shows the
physical location of jumpers and jacks.
(Figures 4-9 and
—
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.
4-18
4/81 Model: ECOM-40
This manual is for educational purposes only. Thc £ tf Information provided herein is not guaranteed or warranted
Genave shall not be liable for a ie f you{Mwn risk. Unauthorized reproduction is prohibited
Co; oN Mv M., MB rights reserved
5-1. INTRODUCTION the assembly, or section, of unit in
which the part is located.
This section of the Maintenance Manual
lists replacement electronic parts, as “The assembly or section number (100,
well as major mechanical components, 200, ...) is indicated next to the ref-
for use in the Genave ECOM-40H VHF-FM erence number heading; that is, CAPACI-
Handheld Transceiver. TORS C100, or CAPACITORS C200, etc.
The first column in the Parts List con- In general, 100-series numbers pertain
tains component reference numbers. The to receiver components, while the 200-
three-digit circuit reference on the series numbers are used for transmitter
schematic is represented in the REFER- parts. Genave part numbers for replace-
ENCE NUMBER column by the last one or able items appear in the Part Number
two digits. The first digit represents column, while a brief description for
each part is shown in the Description
column.
Reference Part
Number Number Description
CAPACITORS C100
1, 1510015 NPO Gimmick, 2.2 pF +10%
2, 39, 40, 41, 42 1570009 Trimmer, 5 - 25 pF
3, 6, 11, 46, 49 1520196 Z5U Disc, .001 uF +10%, 25V
4 --- Selected Value (See Table 4-1)
5 1510002 NPO Gimmick, .18 pF +10%
7 . --- Selected Value (See Table 4-1)
8, 13 1520197 NPO Disc, 3.3 pF +10%, 25V
9 1510011 NPO Gimmick, 1.0 pF +10%
10 1520037 Y5SE Disc, 330 pF +10%, 25V
12, 19, 22, 23, 32 1540215 Mylar, .01 uF +10%, 100V
14 1520184 NPO Disc, 5.6 pF +10%, 25V
15 1520191 N750 Disc, 33 pF +10%, 25V
16 --- Not Assigned
17 1520081 Kemet monocer. .047 uF
18, 29, 43, 50 1520208 N2200 Disc, 180 pF +10%
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: ECOM-40 3/8) 5-1
This manual is for educational purposes only.
ineference
Humber
CAPACITORS €100 (Cont'd)
20, 36
21
24, 25
26, 27, 30, 38, 48
28, 44, 45
31
33
34
35
37
47
CAPACITORS C200
1, 9, 10, 14, 27,
29, 36, 41
2
3, 6, 3, 11, 35,
43, 48, 50, 54
4
5
7, 24
12, 25
13, 42, 49
15
16, 18, 20, 22
17, 19, 21, 23
The accuracy and completeness of the information provided herein is not guaranteed or warranted.
Genave shall not be liable for any loss or damages.
Part
Number
1540204
1520190 _
1520202
1520243
1520195
1550007
1550003
1540221
1520196
1550002
1520208
1550001
1540216
1540215
1526195
1520243
1520190
1520202
1570009
Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 Genave/NRC, all rights reserved.
Description
Electro., 100 uF, 16V
HPO Disc, 22 pF +10%, 25V
N150 Disc, 47 pF +10%
Z5U Disc, .1 uF +80 -20%, 12V
N2200 Disc, 100 pF +10%, 25V
Tant, 10 uF +20%, 35V
Not Assigned
Tant., 3.3 uF, 35V
Not Assigned
Elect., 220 uF, 25V
Selected Value (See Table 4-1)
Z5U Disc, .001 uF +10%, 25V
Tant., 1 uF +20%, 35V
N2200 Disc, 180 pF +10%
Tant., .22 uF +20%, 35V
Mylar, .0047 uF +10%, 100V
Mylar, .01 uF +10%, 100V
2200 Disc, 100 pF +10%, 25V
75U-~Disc., .1 uF +80 -20%, 12V
NPO Disc, 22 pF +10%, 25V
N150 Disc, 47 pF +10%
Trimmer, 5 - 25 pF
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.
5-2
Use at your own risk. Unauthorized reproduction is prohibited.
Copyright © 2007 S78" Inc. All rights reserved.
Model: ECOM-40
This manual is for educational purposes only. The accufacy and completeness of the information provided herein is not guaranteed or warranted
“Copyright © 2007 Genave/NRG, Inc’, ali rights reserved: PT Promanitand
Reference Part
Number Number Description
CAPACITORS C209 (Cont'd)
26 ; 1520037 Y5E Disc, 330 pF +10%, 25V
28 1520039 Y5E Disc, 390 pF +10%, 25V
30 1520043 Y5E Disc, 560 pF +10%, 25V
31, 44, 46 1520189 N220 Disc, 18 pF +10%
32, 38 1510011 NPO Gimmick, 1.0 pF +10%
33, 40 1520191 N750 Disc, 33 pF +10%, 25V
34 1520199 N750 Disc, 39 pF +5%, 25V
37, 39 1520098 NPO EDPT, 12 pF +.25 pF
45 1520097 NPO EDPT, 10 pF +.25 pF
47 1520088 NPO EDPT, 8.2 pF + .25 pF
5] 1520027 N750 Disc, 150 pF +10%
52 1520204 N750 Disc, 75 pF +5%, 25V —
53 1520086 Feedthru, .001 uF, CF777 GMV
DIODES CR100
Ly 2iy Sed 4810017 Sil., Switching, 1N4148
4 4810007 Zener, 6.8V, ZS6.8A
6, 7 4810013 Gen. Purpose, 100 PRV, 1N4001
DIODES CR200 ;
1 4810007 Zener, 6.8V, ZS6.8A
2 4812109 Varactor, M¥2109
FILTERS FL100
1,2 2303504 10.7 MHz, 4-Pole Monolithic
Crystal (Matched Set)
INTEGRATED CIRCUITS IC10C
1 3130366 IF Amp. , SC74126P
2 3139038 Fil IF and Discr., MC3357P
3 3230025 Audio Amplifier, Lit3é6
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.
Hodel: ECO!H-40 3/81 5-3
This manual is for educational purposes only.
Reference
Number
INDUCTORS L100
10
INDUCTORS L260
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 prohibite
Copyright © 2007 Genave/NRC, Inc.
Part
Number
1800105
1800005
1800308
1800350
1800332
1800351
1800304
1800354
1800306
1800145
1300321
1800243
1800322
1800242
1800358
1800350
TRANSISTORS 9100
eal
1
2
4605484
4500064
4800024
all rights reserved
Description
Coil, 3-1/2T, #24 (Table 4-1)
Coil, .03 uH
Coil, 8-1/2T, (Table 4-1)
Coil, 1.0 uH, Wilco M10G
Coil, 56 uH, Wilco MU560
Coil, 470 uH, Wilco MU471
Coil, 4-1/2T {No Core) P. Smith 425
Coil, 1.0 mii, Wilco ES2735
Selected Value :
Coil, 6-1/2T, P. Smith 425
Coil, 3-1/2T, Center-tapped =
Coil, 3-1/2T, P. Smith
Coil, 5-1/2T, .1" I.D., LHH
#20 buss wire
Coil, 4-1/2T, P. Smith 426 —
Coil, 4-i/2T, .2" I.2., LHH
#20 buss wire
Coil, 3.9 uH, Wilco N-39G
Coil, 1 uH, Wilco Mi0G
JFET, N-Channel, 2N54c4
HPN, Sil., Low-Hoise fixer,
HPS H20-5
NPN, Si1., RF, MPS-3563
—
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.
5-4
Copyright © 2007 Genave/NRC, Inc.
3/81
Use at your own risk. Unauthorized reproduction is prohibited
All rights reserved. :
Model: ECOH-40
z ‘
This manual is for educational purposes only. The accuracy and completeness of ‘the information provided herein is not guaranteed or warranted.
Number. Number Description
TRANSISTORS Q100 (Cont'd)
4 , 4805461 JFET, P-Channel, 2N5462
TRANSISTORS Q200
2.3 4800033 NPN, Gen. Pur., 2N5172
4 4800073 PNP, Sil., Darlington, MPS-A64
5, 6 4800024 NPN, Sil., RF, MPS-3563
7 4804427 NPN, Sil., RF, 2N4427
8 4806089 NPN, Sil, RF Power, MRF629
RESISTORS R100
1, 3 4710029 Film, 10K +5%, 1/4W
2,9 4710008 Film, 100-ohms +5%, 1/4W
4, 6 4710036 Film, 56K +5%, 1/4W
5, 24 4710012 Film, 330-ohms +5%, 1/4W
7, 8, 11, 22 4710032 Film, 22K +5%, 1/4W
10 4760082 Pot., 25K (Squelch)
12 : 4710025 Film, 4.7K +5%, 1/4W
13 4710033 Film, 33K +5%, 1/4W
14 4710041 Film, 220K +52, 1/4M
15 4710035 Comp, 47K +10%, 1/4U
16 --- Not Assigned
17 4710038 Film, 100K +5%, 1/4W
18 4760081 Pot., 25K (Vol. Cont. w/ON-Off
Switch)
19, 23 4710013 Comp, 470-ohms +10%, 1/4W
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: ECOM-40 3/8) 5-5
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.
Copyright © 2007 Genave/NRC, Inc., all rights reserved.
Reference Part
Number Nurnber Description
RESISTORS R100 (Cont'd) =
20 4710048 Comp, 4.7-ohms +10%, 1/4W
21 4710027 Film, 6.8K +5%, 1/4W
25 4710001 Comp, 10-ohm +10%, 1/4W
26, 27 4710050 Film, 12K +5%, 1/4W
RESISTORS R200
1 4710048 Comp, 4.7-ohms +10%, 1/4W
2 4710031 Film, 18K +5%, 1/4W
3, 8, 24 4710038 Film, 100K +5%, 1/4W
4,6,7,9 4710029 Film, 10K +5%, 1/4W
5 4710041 Film, 220K +5%, 1/4W
10 4710033 Film, 33K +5%, 1/4W
11 4710068 Comp, 68K +10%, 1/4W
12 4710039 Comp, 470K +10%, 1/4W ~
13 4710013 Comp, 470-ohms +10%, 1/4W
14 4710037 Comp, 82K +10%, 1/4li
15 4760078 Var., 500-ohms
16 : 4710019 Comp, 1.5K +10%, 1/4W
17, 22, 23 4710017 Film, 1K +5%, 1/4W
18 4710024 Comp, 3.9K +10%, 1/4W
19 4710025 Film, 4.7K +5%, 1/4W
20 4710012 Film, 330-ohms +5%, 1/4W
2l 4710027 Film, 6.8K +5%, 1/4W
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. :
5-6 3/81 Model: ECOM-40
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.
Copyright © 2007 Genave/NRC.
Reference Part
Number Number
MISCELLANEOUS
ees ; 2510586
ane 2510550
ae 2510533
ani 2510534
ane 1200076
—_ 2510554
Sse 2100249
aoe 1200013
SP101 2509991
— 4000010
--- 4000007
— 2100298
This manual is for educational purposes only. The accuracy and completeness of the
Genave shall not be liable for any loss or damages. Use at your
5-8 Copyright © 2007 SPRL EC: Inc.
Use at your own risk. Unauthorized reproduction is prohibite:
all rights reserved
Description
Knob, Volume or Squelch
Insert, Top
Cover, Front
Cover, Rear
Antenna, Telescoping, 5-Section
Bushing, Antenna
Connector, BNC, UG-1094/U
Antenna, w/ #8 Screw Mounting
Speaker/Microphone
Battery Pack, 9.6 volts
Charger, Battery
Connector, Battery (9V)
information provided herein is not guaranteed or warranted
isk
sk. Unauthorized reproduction i
Peni nos” "iigdet: “€COne doi