Made some measurements today and above 21MHz I get some RF on 12V line. It is more with bigger frequency.?
Removed one filter capacitor (that comes in parallel with the coil of a relay) and I have 2Vpp on the 12V side. I get this , even without connecting ATU to power supply, without any cables. So, it doesn't cone from power supply.
RF noise seems to be more on inductors side.?
Where might come from? Relays, diodes, tandem match?
