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I've just acquired a 70s Ampeg GT-10 - it's a small, champ-like 1x10 solid state amp with reverb. Pretty decent for a solid state. But this thing has a faint... fizziness on top of the notes. It's tough to describe (and therefore tough to google), so I thought I'd ask the experts.
It's kind of a faint distortion sound on top of notes played. Almost fizzy. Static-y. Kind of like distortion, but the note itself is still clear as can be. It's like this sound is separate, or "on top" of the note. Does this sound familiar to anyone? If so, can you recommend some troubleshooting steps, or at least some more helpful google search terms?
As for me, I've got experience doing simple repairs on tube amps, and I have a pretty general grasp of how tube amps work. This is the first time I'll be taking on a solid state project, so I figured this small (and hopefully simple) amp would be a good place to start. If this were a tube amp, I would check the tubes, clean all the sockets and pots and jacks, etc.
My (mostly blind) guess is this will turn out to be a leaky cap somewhere. If that's the case, what's a good way to check for that, without a scope? If it helps, when I have the reverb all the way up, the fizz dwells as long as the reverb. So I would tend to think the fizz is being introduced somewhere after the reverb, right?
I've attached a photo of the amps guts, if that's of any help. Thanks very much in advance.
It's kind of a faint distortion sound on top of notes played. Almost fizzy. Static-y. Kind of like distortion, but the note itself is still clear as can be. It's like this sound is separate, or "on top" of the note. Does this sound familiar to anyone? If so, can you recommend some troubleshooting steps, or at least some more helpful google search terms?
As for me, I've got experience doing simple repairs on tube amps, and I have a pretty general grasp of how tube amps work. This is the first time I'll be taking on a solid state project, so I figured this small (and hopefully simple) amp would be a good place to start. If this were a tube amp, I would check the tubes, clean all the sockets and pots and jacks, etc.
My (mostly blind) guess is this will turn out to be a leaky cap somewhere. If that's the case, what's a good way to check for that, without a scope? If it helps, when I have the reverb all the way up, the fizz dwells as long as the reverb. So I would tend to think the fizz is being introduced somewhere after the reverb, right?
I've attached a photo of the amps guts, if that's of any help. Thanks very much in advance.
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