Home › Forums › Design and Building › 2 Stroke Amplifier Design and Building › Squeal and hum on 2stroke › Re: Re: Squeal and hum on 2stroke
January 30, 2013 at 11:49 am #5783
I think I can closeout this thread by saying after adding a standby/Pentode/triode switch, I inadvertently found the wire that was the cause of hum.
adding the switch added a tone of hum, but moving it (and its many attached leads) about three mm made the big hum go down to virtually nothing .
the only noise you hear now is a tiny bit of hiss and only when cranked .