Heathkit HM 10A Schematic
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Extracted text from Heathkit HM 10A Schematic (Ocr-read)
Page 1
TI 363 TI 363 2N407
01 ® 02 03 METER
SENSITIVITY
CzB SWI TCHED INTO THE CIRCUIT
BY THE LONGER COIL PLUG PIN.
1. ALL RESISTOR VALUES ARE IN Q; K =1000;
2. ALL RESISTORS ARE 112 WATT.
3. OINDICATES POSITIVE Dc VOLTAGE MEASUREMENT
FROM POINT INDICATED To CHASSIS GROUND.
4. VOLTAGE MEASURED WITH AN 11 MEGOHM VTVM,
1-5 VOLTS NOMINAL SWITCH IN osc. POSITION AND SENS CONTROL
SET TO READ 50 ON METER.
m77 SCHEMATIC OF THE HEATHKIT TUNNEL DI PPER MODEL HM'lOA.
Courtesy Heath Co.
Fig. 7-20. A three-stage transistor amplifier is used to increase sensitivity in the
tunnel-diode GDO.