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static feedback on my amp - any ideas?
Posted by: Ombligo
Date: May 22, 2006 06:32PM
Suddenly I'm getting a static sound from by beloved 12-year-old Carver power amplifier. I've checked it with two different preamps and two different speakers, same sound regardless. I've also tried different electrical outlets, so everything has been eliminatedexcept the power amp.

The music is still coming through but there is static as well.

Any guesses what it might be?



“No persons are more frequently wrong, than those who will not admit they are wrong.”
-- François de La Rochefoucauld

Growing older is mandatory. Growing up is optional.
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Re: static feedback on my amp - any ideas?
Posted by: The Grim Ninja
Date: May 22, 2006 06:45PM
What about without any preamp?

Bought any new equipment recently? (On other house circuits)
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Re: static feedback on my amp - any ideas?
Posted by: Spiff
Date: May 22, 2006 07:14PM
Clean the contacts. I've got 10+ year old denon (PMA 720, I think) that has a click dial the switches between tape deck A and B. I have to wiggle it and fudge it to get rid of static and get a clean sound. Frustrates me every time. I'm just lazy to not get it cleaned. That, and I'd be out of music for however long it takes to service the amp. Perish the thought.

I am assuming, of course, that there are hard wire dial contacts that you select on your amplifier instead of merely pushing a button. If it's a push-the-button type thing, then I have no clue.

Maybe this helped?



Edited 1 time(s). Last edit at 05/22/2006 07:15PM by Spiff.
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Re: static feedback on my amp - any ideas?
Posted by: billb
Date: May 22, 2006 07:53PM
Is it worse while moving the volume control ?
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Re: static feedback on my amp - any ideas?
Posted by: Ombligo
Date: May 22, 2006 08:45PM
This is a straight power amp - not a pre-amp or tuner. There is no volume or knobs. The signal goes in, gets boosted to a reasonable level and routed to the speakers.

The feedback is from every speaker post, so it is internal.

Here is photo of the same type of amp (This is not my Amp)
[www.lehigh.edu]



“No persons are more frequently wrong, than those who will not admit they are wrong.”
-- François de La Rochefoucauld

Growing older is mandatory. Growing up is optional.
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Re: static feedback on my amp - any ideas?
Posted by: mikebw
Date: May 23, 2006 12:55AM
Are you handy with a soldering iron? It could be one (or two) of the two large black filter capacitors seen here:


It would probably cost you about $10-15 to replace those yourself, but I'm not even sure that would fix it.

If you want some more help diagnosing this problem, check out [www.pesupport.com]
Just post your same question with a picture and you'll get some good responses I bet.
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