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RE: Amp hum - do I have an issue (or just need education!)?

On my St-35 clone I had an identical problem. Both channels. 20mVAC on the outputs. Went away with shorted inputs. I was sure it was a grounding problem.

Nope. One channel's ultra-linear wire was sticking out through the ckt bd far enough to contact the chassis. Pulled it back a bit and presto. Hum gone.

Check the boards for protruding wires that might contact something.

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  • RE: Amp hum - do I have an issue (or just need education!)? - altecboy 10:20:38 11/03/15 (0)
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