Heathkit GD 39 Schematic
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Extracted text from Heathkit GD 39 Schematic (Ocr-read)
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
§
I