Heathkit GDA 57 2 Schematic

Page 2

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26.995 26.542
._ .. -- -- -- - -- 27.045 26.592
27 MHZ 27.095 26.642
BAND 27,145 26.692
27.195 26.742
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53.100 26.3235
53.200 26.3735
53 MHZ 53.300 26.4235
BAND 53.400 26.4735
53.500 26.5235
36.040 36.2665
36.120 36.3465
72 MHZ 36.200 36.4265
BAND 36.480 36.7065
37.820 37.5935

SCHEMATIC OF THE

HEATHKIT
IE is DIGITAL PROPORTIONAL SERVO
'A"""""" _a_I._I____ MODEL GDA-IQ-4
.4 " 22:.25532222324332115(I . Tm, mom.

2. ALL CAPACITOR VALUES ARE IN {Jr UNLESS MARKED OTHERWISE.

3. CD THIS SYMBOL INDICATES A POSITIVE DC VOLTAGE MEASUREMENT WITH NO

SIGNAL BEING RECEIVED. S C H E M A T I C 0|

4. ALL VOLTAGES ARE MEASURED WITH A HIGH IMPEDANCE VOLTMETER, FROM

THE POINT INDICATED TO COMMON GROUND. VOLTAGES MAY VARY 00%. H E A T H KIT

5. REFER TO THE SERVO PHOTOGRAPHS AND CIRCUIT BOARD XHAY VIEW FOR THE

PHYSICAL LOCATION OF PARTS. 3 - C H A N N E L D I G I T A L I:
6. * THESE WAVEFORMS snow THE DRIVE SIGNALS FOR BOTH DIRECTIONS. R E C E I V E R

MODEL GDA

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