xbilx wrote:
Hello:
Hoping someone maybe able to help me troubleshoot. I recently picked up a mesa triple rectifier, i have only been able to play it through my (crappy) marshall mg412 cab. Everything started off great but then i started to realize after an hour or so of playing the volume would all of a sudden drop, notes (especially bass side) got super flat, almost staticy sounding too. I turned it off, let it sit a bit and then it would go back to normal. This happened a few times but now it is just like that all the time. I changed all the tubes, cleaned it inside, nothing...it almost sounds like maybe the speaker is blown but that seems odd since it would go out and then come back ok after resting. I havent changed the fuse but would that be an issue if its powering up just fine?
Have you tried the amp with the FX loop set to "Loop Bypass"?
Are you using Bold or Spongy, Tube Rectifier or Silicon Diode?
Also, exactly what tubes did you replace, and what (brand) did you use. Certain 12AX7's do not hold up well in the cathode follower preamp positions, and have been known to fail in those positions.
Dom
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