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My peavey renown 212 [1992] has rumbling sound in clean channel , lead channel sounds ok can someone help me with this thanks
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Probably a noisy IC in the channel.Education is what you're left with after you have forgotten what you have learned. -
Do you know how I can find out which ra4558 IC is the problem?Comment
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Is the noise a background noise or is there an effect on the instrument signal?
EDIT: As noted by Enzo below, Peavey often used sockets to mount their IC's around the time of that amp. I only know this because I had one for a short time. That would make it easy to get one chip and just swap the new one for the first, then the first for the second, etc. If a chip is bad it should reveal itself.Last edited by Chuck H; 10-27-2011, 06:22 AM."Take two placebos, works twice as well." Enzo
"Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas
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Are they in sockets? Get one spare, and substitute it into each socket going down the row. If one of those swaps makes the difference, you fixed it.
I would use a scope to go through teh amp stage by stage.
WHich controls do and which do not affect the noise?Education is what you're left with after you have forgotten what you have learned.Comment
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Effects are off. Can I swap the RC4558P chips around to find the bad one? Its only in the clean channel, lead and crunch channels are noise free. It has 4 in sockets and one solder in. thanks for the helpComment
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Yes, of course,move them around and see if the problem moves/changes.Education is what you're left with after you have forgotten what you have learned.Comment
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