Now I will try to do what you suggested and visually check all the solderings on the cards. Unfortunately I do not have an oscilloscope
I confirm that he receives nothing! Turning the tuning potentiometer, the QRM increases in two places. If I stop on one of these points and unplug the antenna, nothing changes! As if the antenna was not connected
Thank you
Sergio
Da:[email protected] <[email protected]> per conto di Skip Davis via Groups.Io <skipnc9o@...> Inviato: mercoledì 18 aprile 2018 17:40 A:[email protected] Oggetto: Re: [BITX20] Help me! annoying ticking in the audio #bitx40help
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Sergio, if I understand you correctly? that your not receiving any signals with an antenna connected then it is possible that one or all of the oscillator signals might be missing.
If you have an oscilloscope you can check pins 3, 6, and 9 for signals these are the SI5351 clock outputs. I would also check over the Raduino board with a magnifying glass that all the solder connections are good.
I am not sure what test equipment you have there to help troubleshoot your problem, but I hope this helps you somewhat.
