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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 antenna to the lower pad where capacitor C95 will be mounted. Adjust R53 in both
directions to verify the receiver tuning changes approximately 3 KHz up and down in
frequency from the center detent position.
Your Measurements/Observations - ______________________________________________
____________________________________________________________________________
At this stage of the assembly, the receive strip is complete and fully functional. You might want to
readjust the RxLO (trim capacitor TC9) to set the injection point so that cw stations are at a
pleasing note, around 700 Hz, and the loudest you can make them. As you adjust the RxLO,
you'll have to re-tune the station with tuning potentiometer R54 to keep it centered in the
passband of the receiver.
Transmit Local Oscillator (TxLO)
[ ]
Install inductors L3 and L9.
[ ]
Install trim capacitor TC10. The rounded end is the grounded end.
[ ]
Install transistor Q1.
[ ]
Install resistors R1, R2, R3, R4, R7 and R8.
[ ]
Install capacitors C1, C2, C3, C7 and C22.
- Figure 33 -
29
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