Dc voltages, Specifications – Elenco AM/FM Radio Kit User Manual
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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
Q4
B
1.3
E
.9
E
.7
C
7.0
C
7.5
Q2
B
3.3
Q5
B
1.3
E
3.0
E
.6
C
7.1
C
7.5
Q3
B
1.6
Q6
B
1.2
E
1.3
E
.6
C
7.0
C
6.6
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.
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%