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DC VOLTAGES
The voltage readings below should be used in troubleshooting the FM section. (Switch at FM position.)
Q1
B
1.6
E
.9
C
7.0
Q2
B
3.3
E
3.0
C
7.1
Q3
B
1.6
E
1.3
C
7.0
SPECIFICATIONS
Audio:
Frequency response 3dB drop into 8 ohm resistive load.
Low end 800Hz - high end 120kHz
Maximum power out at 10% total harmonic distortion.
500 MilliWatts
Typical audio gain at 1000Hz: 150 times
Typical % distortion at 100 milliwatts output <2%.
AM Radio Specifications:
Tuning range - 520kHz to 1620kHz
IF frequency 455kHz
Tracking = +3dB from 700kHz to 1400kHz
10dB signal to noise at 200 microvolts typical
FM Radio Specifications:
Tuning range = 88MHz to 108MHz
IF frequency 10.7MHz
Tracking +5dB from 90MHz to 106MHz
10dB signal to noise at 12 microvolts typical
Uses ratio detector and full time auto frequency control.
Q4
B
1.3
E
.7
C
7.5
Q5
B
1.3
E
.6
C
7.5
Q6
B
1.2
E
.6
C
6.6
Test Conditions
1. Volume set to minimum.
2. Connect TP14 to TP15 with a jumper wire.
3. Battery voltage = 9V
4. All voltages are referenced to circuit
common.
5. Voltage readings can vary +10%
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