Marshall AVT 275 -Problem

[AndreasAvt275]

good morning everybody,

hopefully someone can help.

i do have a marshall AVT 275 (bought in 2001). i haven’t used in years. restarted using it some weeks ago and since then i have problems with my two od-channels. like some sort of squeaking in the background etc. just annoying noises - due to the fact, that i never had that before when i was using the amp regularly, i guess something is wrong.

further information:

- the clean channel still works amazingly fine, even with a bif of crunch etc. no annoying noises

- the volume level of the amp is still like it was when i bought it. so no loss of volume.

- changed the guitar, cables etc. so it must be the amp.

- i didnt changed the tube (its one tube 12AX7) yet.

does anybody have an idea what the problem is. could it be a prob with the tube?

thanks in advance

andreas

 

[FleshOnGear]

Welcome to the forum @AndreasAvt275! I think it would be good to try swapping the preamp tube. That’s something you can do yourself. There is a chance it’s a tougher problem, like old electrolytic capacitors, but try the tube first. Good luck!

 

[Mitchell Pearrow]

To The Forum
Definitely worth the try on the tube as @fitz said.
Good luck with getting it back in order.
They are cool amps after all

 

[fitz]

To The Forum
Definitely worth the try on the tube as @fitz said.
Good luck with getting it back in order.
They are cool amps after all

Mitch the mind reader...
I was thinking of suggesting a new tube would be a good place to start, but @FleshOnGear beat me to it.

 

[Mitchell Pearrow]

Mitch the mind reader...
I was thinking of suggesting a new tube would be a good place to start, but @FleshOnGear beat me to it.

Thanks buddy but I had thought you had made that post.
So thanks must go out to @FleshOnGear
Sorry for the mix up .. lol

 

[AndreasAvt275]

thank you for your advices. i’ll start with changing the tube. then i’ll see!

i was thinking abt. a T.A.D. - heard a lot of good things about it.

and until then, i’ll enjoy the amazing clean sounds.