QCX assembly Rev 1.08
63
3.70
Adjustment and alignment
The first thing that you will notice when you apply power to the radio, is that there is probably
nothing at all shown on the display. This is because you need to adjust the contrast trimmer
potentiometer R47 at the top right of the PCB! Adjust it with a screwdriver until the display text
looks right to you.
You should now see the following text on the display:
Select band:
80m
Turn the rotary encoder knob to select the band you have built the kit for. Then press the small
button to the left of the rotary encoder, to make your selection.
There are four more adjustments which now need to be made as part of the alignment procedure.
The adjustments are:
•
Band-pass trimmer capacitor peaking, C1
•
I-Q amplitude balance, R27
•
Audio phase shift adjustments, R17 and R24
Until these are adjusted, the sensitivity of the radio will be very low. So, do this first, before going
any further!
The location of these five adjustments is indicated on the following diagram.
Summary of Contents for QCX 5W CW
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