Mongoose
/ Bulldawg
Documentation Project
CBTricks.com
Receiver Alignment
Test Equipment
1. RE Signal Generator
2. V.T.V.M.
3. 8 ohm dummy load (10
watts)
4. Distortion Meter
5. Power Supply
6. Oscilloscope
Alignment Procedure
1. Connect Pin 4 of Mic
jack to ground.
2. Connect RF signal generator
output terminal to antenna jack, set modulation 1KHz at 30%.
3. Connect power cord
to power supply.
4. Connect dummy load
to EXT speaker jack.
5. Connect V.T.V.M., oscilloscope
and distortion meter to dummy load.
6. Set signal generator
and radio to Ch19.
7. Turn squelch frilly
counterclockwise and the volume fully clockwise.
8. Signal input must be
kept as low as possible, to avoid overloading and clipping.
9. Adjust T101, T102,
T213, T103, T104, & T105 for max. on V.T.V.M..
10. Reduce output from
signal generator so that audio output remains about 500mV-2V.
11. Repeat steps 9 &
10 to obtain max. output.
12. Set output of signal
generator to 1uV.
13. Check that V.T.V.M.
indication is above 4V and S+N/N is below 10dB.
14. Check that audio output
is over 4V on channels.
15. Turn squelch volume
fully clockwise, and adjust RV3 so that audio output appears.
16. Adjust VR1 so that
meter indicator is set at S-9 position.
Disclaimer: Although the greatest care has been taken while compiling these documents,
we cannot guarantee that the instructions will work on every radio presented.