Heathkit GW 31A Schematic

Page 1

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Assembly and Operation

of the

TABLE OF CONTENTS

Introduction.................... 2
PartsList................... 3

H A N D _ H E L D Step-By-Step Assembly - Circuit Board. . . . . . . . . . . 5
Adjustments.................... ..........12

TRANSCEIVER FmaIAssemny................. ....15
FinalAdjustment................ ....18

M 0 D E L 6 W- 3 1 A
In Case OfDifficulty........................... 20
Troubleshooting Chart.......................... 21
Excerpts From FCC Rules And Regulations Part 15. . . . . 23
Crystal List. . . ................ ............ 25
Specifications. . . . ................... ....... 26
Circuit Description. . . . .. 29
Circuit Board X-Ray VieW. . . 33
Schematic. . . . . (fold-out from page). . . . . . . . . . . . . 35

HEATH COMPANY,

BENTON HARBOR. cwyrigme was

MICHIGAN 177%???) more:

,
. SCHEMATIC OF THE
HEA'I'HKII'g MICROPHONE ANTENNA
HAND-HELD TRANSCEIVER 922,3 Ill Tr
MODEL GW-SIA
"or swl .oozl Iuro
RECEIVE TRANSMIT
L I'IJSTEIIE 45541219115 z °°°"
L . .

ALERV$£GESARE MEASURED FROM noma- molcnzn TO CHASSIS 5mm

VOLTAGE READINGS TAKEN WITN AN II MEGDHM INPUT VTVM.

VOLTAGES MAY VARV :IOX.

swmru sm swarm m YRANSMIT POSITION. SECTION 9 3

VOLTAOES AT 03 Am 04 TAKEN UmER THE FOLLWIW COMITIONS:

DUMMY LOAD POSITIONED ON TRANSMITTER OSCILLATOR COIL LA.

TEST CAPACITOR CW CONNECTED TO TP DN CIRCUIT BOARD.

SWITCH 9" IN TRANSMIT POSITION

ANTENNA REWVED.

VOLTAGES AT OI AM) 02 TAKEN UPDER THE FOLLOWIIG CONDITIONS:

REGENERATION CONTROL SET FOR LOWEST HISSIW scum FROM
SPEAKER. THEN SET THE VOLUME CONTROL FOR MINIMUM VOLUME,

ANTENNA CONNECTED.

REFER TO THE X-RAV VIEWS FOR THE PHYSICAL LNATION OF PARTS
ON THE CIRCUIT BOAR.

0 a
_ REGENERATION
- con-ram

on OFF
- BATTERY THIS sWIrcHls 0N
VOLUME CONTROL

0 0
RIG
I T2
4
_C_/!
.002
FD
5
2N27I2
MICROPHONE :
AMPLIFIER
+ Cl!
Ioc
UFO