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Test – Connect a speaker or headphones to the "SPKR" jack. Apply power to the PCB. Connect
an RF probe or oscilloscope to the top of resistor R81. Adjust trim resistor R87 to the middle of
its travel. Jumper the "Key" pads together to key the transmitter. Alternately adjust trim
capacitors TC1 and TC2 for maximum output. The RF probe should show an output level
of approximately 1.7 volts. On the oscilloscope, the waveform should approximately match that
shown in the next figure.
Your Measurements/Observations - ______________________________________________
____________________________________________________________________________
Transmit Final Amplifier
- Figure 41 -
- Figure 42 -
35
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