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Install resistors R86, R88, R89, R90, R91, R92, R93, and R94
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Install trim potentiometer R87.
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Install capacitors C104, C106, C108, C109, and C110.
Your PCB should look like that shown in the next figure.
Test – Connect a speaker or headphones to the "SPKR" jack. Apply power to the PCB. Connect
an RF probe or oscilloscope to the top pad of capacitor C103. Adjust trim resistor R87 CW to
the end 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 volt. On the oscilloscope, the waveform should approximately match that
shown in the next figure.
- Figure 39 -
33
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