Heathkit GD 39 Schematic

Page 2

El TRANSMITTER

SCHEMATIC or THE
HEATHKIT®

MODEL (ED-39
ULTRASONIC INTRUSION ALARM

NOTES:

1. ALL RESISTORS ARE 1/2 WATT. RESISTOR VALUES ARE IN OH
IK=1,000, M=1,00D,000.I 5% TOLERANCE RESISTORS ARE MARI
WITH AN ASTERISK,

Z, ALL CAPACITOR VALUES ARE IN ME UNLESS OTHERWISE MARK

3. SYMBOLS:
* 5% TOLERANCE RESISTDRS I 4m BAND GOLD )

A CIRCUIT BOARD CONNECTION HOLE. A LETTER IN THE
SQUARE IS THE LETTER PRINTED ON THE CIRCUIT BOARD.

C: TRANSDUCER.

OA DC VOLTAGE OF THE SAME VALUE AS THE CONTAINED Fl

[IE-Ac SOCKET.
..

4. REFER TO THE TRANSISTOR AND DIODE IDENTIFICATION CHAT
FOR IDENTIFICATION INFORMATION OF THESE DEVICES.

5. REFER TO THE X-RAV VIEWS AND THE CHASSIS PHOTOGRAPHS
THE PHYSICAL LOCATION OF PARTS.

6. REFER TO THE VOLTAGE CHART FOR VOLTAOES AT TRANSISTOR
AND DIODE LEADS.

PRIMARY
CONNECTIONS

I 20 240
VAC VAC

[80
§

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