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Hi all,
I posted about this a little while ago, but decided to re-post now since I have updated info to share.
I have an Allen Accomplice I built in 1999. After years of modding and tinkering with this amp, I decided to do a major modification and turn this little amp into a JCM 800 clone. I love the results! I've also done a cap job on it, about a year ago, after (gulp) almost 20 years on the original Illinois E-caps.
This amp has sounded KILLER for over a year, but now has suddenly developed an issue.
Tthe volume has started fluctuating, mildly, but just enough that my bandmates and I can hear it. There is also a very faint, extra distortion when a note's volume fluctuates "low". It's minor, and a non-musician may not notice it, but it's there, and it's a new phenomenon. And it's driving me NUTS.
The noise is most easily re-created when playing an open E chord, specifically plucking the E note on the D string. It is an intermittent, distorted, fuzz-tone type "note" riding on top of the true note - sounds like a fuzz-tone, and sounds like it's a musical third (chuckle, the noise has a good ear and a sense of humor). And as I said, it is intermittent (but easily induced), but most definitely there where it sure shouldn't be;
I've also noticed an intermittent crackling, as well.
I swapped out all tubes, preamp, power, and rectifier, without any effect. It's not a bad tube. I'm suspecting a problem with a filter cap, at this point, even though I recently replaced them all.
Ideas?
Thanks in advance!
I posted about this a little while ago, but decided to re-post now since I have updated info to share.
I have an Allen Accomplice I built in 1999. After years of modding and tinkering with this amp, I decided to do a major modification and turn this little amp into a JCM 800 clone. I love the results! I've also done a cap job on it, about a year ago, after (gulp) almost 20 years on the original Illinois E-caps.
This amp has sounded KILLER for over a year, but now has suddenly developed an issue.
Tthe volume has started fluctuating, mildly, but just enough that my bandmates and I can hear it. There is also a very faint, extra distortion when a note's volume fluctuates "low". It's minor, and a non-musician may not notice it, but it's there, and it's a new phenomenon. And it's driving me NUTS.
The noise is most easily re-created when playing an open E chord, specifically plucking the E note on the D string. It is an intermittent, distorted, fuzz-tone type "note" riding on top of the true note - sounds like a fuzz-tone, and sounds like it's a musical third (chuckle, the noise has a good ear and a sense of humor). And as I said, it is intermittent (but easily induced), but most definitely there where it sure shouldn't be;
I've also noticed an intermittent crackling, as well.
I swapped out all tubes, preamp, power, and rectifier, without any effect. It's not a bad tube. I'm suspecting a problem with a filter cap, at this point, even though I recently replaced them all.
Ideas?
Thanks in advance!
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