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previous: Mike Gardner Epiphone Comet Tube Amp EA32-RVT -- 11/21/1999 12:04 AM

Re: Epiphone Comet Tube Amp EA32-RVT

11/22/1999 3:37 AM
Farrow	Re: Epiphone Comet Tube Amp EA32-RVT Mike, it could be lots of things. Epiphone, right? Look for leaky coupling caps between tube stages. There shouldn't be too many of them, and if there's a DC offset on the grid of a gain stage, then there goes the bias and the tone. I'd replace ALL the caps in the amp. Maybe not the tone control caps, but certainly all the electrolytics. Make sure the catode bypass cap for th output tubes is OK also. Many times they're not rated at a high enough voltage (though with EL84s a 25V should be fine.) Also, I would replace ALL the plate resistors with either new stock carbon comp or carbon film resistors to cut down on noise. My .02 Farrow http://surf.to/pharaohamps http://www.skybolt6.com PS I think I might have a schem lying around. If you want it email me back.

11/22/1999 3:37 AM

Farrow

Re: Epiphone Comet Tube Amp EA32-RVT

Mike, it could be lots of things. Epiphone, right? Look for leaky coupling caps between tube stages. There shouldn't be too many of them, and if there's a DC offset on the grid of a gain stage, then there goes the bias and the tone. I'd replace ALL the caps in the amp. Maybe not the tone control caps, but certainly all the electrolytics. Make sure the catode bypass cap for th output tubes is OK also. Many times they're not rated at a high enough voltage (though with EL84s a 25V should be fine.)

Also, I would replace ALL the plate resistors with either new stock carbon comp or carbon film resistors to cut down on noise.

My .02

Farrow
http://surf.to/pharaohamps
http://www.skybolt6.com

PS I think I might have a schem lying around. If you want it email me back.