afterimage Posted March 7, 2014 Posted March 7, 2014 a mate of mine valve amp is making a blip blip blip noise through his speakers tried i with with no guitar plugged in it , it still does the same thing power off for 40 mins it goes off i lent him a shielded hi fi mains cable to try out but did not solve it any ideas what it is ? thanks Quote
waldflote8 Posted March 10, 2014 Posted March 10, 2014 I had a problem on a pair of Peavey Windsors,.. sort of irregular crackle/pop,.. small,. not like plugging/unplugging a guitar/bass with the amp volume up. It turned out to be the bias circuit, replaced the pot in each of them and fixed the problem. I had to track it with a scope, but when I narrowed it down to the bias circuit I was able to make it do the noise when pushing on the pot with an insulated chopstick. Quote
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