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annoying humming sound

Kenwood AM/FM Stereo receiver 104AR. Any suggestions of what the humming noise could be?



annoying humming sound

If the humming is there all the time then it is probably power supply related (filter capacitors are bad). If it is there only with the volume turned up then it is external and could be your source, or poor shielding on a cable, or possibly a problem in a pre-amplifier circuit (like the phono pre-amp).

annoying humming sound

Thank you very much! Have a good day.