R3 for tuning the frontend
R6 for setting the gain
R16 for zeroing the output
R21 to set the range for the frontpanel meter
R22 to set the range for the A/D
The procedure I used was:
- set R16 to zero the meter and A/D
- center the R3 and R6
- adjust R3 for max signal.
- adjust R21 so meter is mid scale. I may need a bigger value for R21 as the meter is offscale.
- tweak R6 for max. This seems sensitive, maybe pushing the circuit into oscillation?
In the pic above I am using my voltmeter, which has recording software, to monitor the signal. I've set the outputs to about 2.4V.
I can clearly see the signal change as I rotate the antenna, so its receiving something. I've adjusted it to max signal. That's pointing off to the NE, so I may indeed be receiving from Skilton, UK.
I'll let it run to night to see if I can record the sunset events.
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