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Test – Temporarily connect a 51 Ohm resistor from the top of resistor R40 to ground. This
resistor supplies a load for the VFO driver stage. Apply power to the PCB. Connect an RF
probe or oscilloscope to the top of resistor R40. Peak the driver tuned circuit by rotating TC7
while watching the output level. At the peak setting, the RF probe should show an output level
of approximately 0.9 volts. On an oscilloscope, the waveform should approximately match
that shown in the next figure.
Your Measurements/Observations - ______________________________________________
____________________________________________________________________________
Receive Main Mixer
[ ]
Install mixer M2. Before soldering all of the leads, make sure it it oriented correctly. A dot on
the part and on the PCB denote the location of Pin 1.
[ ]
Install resistor R66.
Your PCB should look like that shown in the next figure.
- Figure 26 -
23
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