Mesa ta-30 combo problem...any ideas?

Gear
#1

Hello… I have a mesa ta-30 combo …I bought the amp in 2011 and this summer i changed all of the power tubes because it was creating weird noises, hum voume drops etc. but the problem is still going on. I sometimes use the amp with captor x attenuation. thinking about repacing the preamp tubes as well but they say preamp tubes wear out seldomly. The problem mostly happens in the drive channels .So for now at home i use a drive pedal.

Also in my country the official disributor does not have tubes in stock or technical service. I had to order the tubes from abroad which is a hassle. This is a nice amp in my opinion but i can’t use it at band rehearsals because of this problem.
Do you have any solutions/ideas about what the problem might be?

i posted a video about this problem. Maybe the video explains it better than i do :slightly_smiling_face:
thanks in advance

Here is the link:

#2

Is that almost rattling noise we hear right at the start of the video from the amp, or is that something else in your room? I’m guessing it’s something else, but…

Ah, yeah, just got to the gain sound. Never played a TA, and honestly that’s higher gain than I’d have expected… but that’s Mesa for you.

Anyway, just a hunch… but hum and kind of a washed out sort of sound in places that’s only really happening on one channel in a multi-channel amp does suggest a preamp tube.

I’m not sure if you have the manual handy, but if not - go to page 40 here.

That identifies tube location by function, and my guess would be V2 is your culprit.

1 Like