Backstage 30 buzzing

This forum is for talking about all kinds of Peavey guitar amplifiers.
Post Reply
vincenzotca
New Member
Posts: 1
Joined: Wed Jun 02, 2021 5:15 pm

Backstage 30 buzzing

Post by vincenzotca » Wed Jun 02, 2021 6:17 pm

I picked up a used backstage 30 I have significant buzz and it gets more pronounced with increased gain. No guitar plugged in

User avatar
Pappy B
Member
Posts: 767
Joined: Sun Jan 31, 2016 2:30 pm

Re: Backstage 30 buzzing

Post by Pappy B » Sat Jun 05, 2021 4:45 pm

That amp is old enough to have bad capacitors in the power stage. Have you pulled the chassis and looked it over? Look for bulged or split caps, burnt resistors. Keep in mind that a bad cap can look okay. Could also be a bad op-amp (usually a 4558) or even bad power transistor.
The more I learn the more I realize how much I don't know.

Post Reply