Heathkit GD 69 Schematic 2

Page 1

CIRCUIT BOARD

:c/

IOLLF

R/9
680

CALIBRATE

é 920
. 5000

r----------_--------------

NOTES:

1 .

n.)

\J-I

A|------------------------------------------

ALL RESISTORS ARE H2 'T'T'i-ITT.
GHTIS 'K=l 000'.

| H

TO THE CIRCUIT BOARD.

THIS SY'TBOL INDICATES AH EXTERNAL

RESISTOR 'V'ALEES FIRE

COIIHECIIUII

REFER TO THE CIRCLIT BOARD XRAY JIESIS FOR
PHYSICAL LOCATION OF PARTS.

SLIDE
SWITCH
r I
' :0 0-H : METER
IIIII:+ :® @ELOW 0
9V ' :HIGH
BATTERY I 0I I
I
I 0 0 I OFF
1 ______ J

SCHEMATIC or THE
HEATHKITE
THUMB TACH
MODEL 60-69

a OTHIS SYMBOL INDICATES A POSITIVE DC VOLTAGE
"-1FAS'JRED TROO THE POINT INDICATED TO CIRCUIT
ORO'Igr-LO IPOIHT Os. VOLTAGE MEASURE-ELENTS M9:
TAKEN "IZIIH AH 11 a'IEGOH'xT VOLTMETER TTITH THE PHOTO
RESISTOR COVERED. VOLTACES "JAY :20".

F A
7 , :4

THE SCH'KIITT TRIGGER IS IN

THIS SYTTBEJL INDICATES 0C VOLTAGES TAKE": L.IIEN
ITS ALTERNA'E STATE

r---------------------------------------------------------------------------------------------------------------------1
SCHMITT MONOSTABLE 1
AMPL'F'ER AMPL'F'ER TRIGGER ~33 MULTIVIBRATOR I
4
9 o 9 9 o o w. 0
gm -‚¬93 as 97 .99 (m; 97
5600 33K $8200 82K ISK 8200 22K
Pf6
IOOK
-o M 0
C6
PHOTO .OIuF
RESISTOR H
C. II
3 A
01 02 C4 93 & 9/0 04 A C5 05 9/5 06
2N3393 ® 2N3393 Q49 2N3393 -ISOK 2N3393 @009F 2N3393
IEZIJJT ( °

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