WonderNomad
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- Apr 11, 2025
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I recently completed building a LM3886-based gainclone amplifier. The build seemed to go smoothly, all connections checked multiple times, and I'm getting audio output.
However, I'm plagued by a significant and persistent 50/60Hz hum (sounds like mains frequency) that's present even with the input shorted and the volume at minimum. It increases slightly with volume but is always clearly audible. However, I haven't figured out what's wrong yet.
However, I'm plagued by a significant and persistent 50/60Hz hum (sounds like mains frequency) that's present even with the input shorted and the volume at minimum. It increases slightly with volume but is always clearly audible. However, I haven't figured out what's wrong yet.