I have a marshall 40w amp that started having intermitent trouble in my house a few years ago....it went out eventually, went to get it fixed and it went out again.

so I went a bought a Peavy Classic 30 and started having the same problems.

the problem is after a while of being on (on some days) it starts to lose output and the volume goes down and them comes back up... and back and forth and there is some scratchy sounds comming through the speaker. Today no volume at all or I trurn all the way up and it's quiet!

PLEASE Help...I going to go cry now

did you check your power tubes

thanks...

how do i check the power tubes?

the Peavey started doing it when it was brand new. just a coincidence that they are both doing this? both power tube issues

I am convinced its my house. its haunted or something. SOO frustrating

i changed all the outlets in my house because of this, had an electrician make sure everything was good and right now i am checking the voltage comming through the same surge protector my amp is plugged into...amp keeps losing volume and comes back but there is no change in the voltage.

its an old house built in 65. anyone heard of problems with older houses f9cking up amps

[Edited on 8/25/2007 by telenash]

[Edited on 8/25/2007 by telenash]

Just wondering if it does it at a gig? Have you tried different guitars? Sometimes the volume pot will get dirty and "crackle pop" and the volume will fade. Try it at another location and see what happens if the guitar is fine. It the power surges most likely the fuse will blow and protect the amp.

Kinda hard to pin-point without seeing or hearing the amp.

Let us know

Good point.
A friend of mine had a Boss multi effects unit that wouldn't work in one venue, it just didn't like the electrics at that venue.

i thought the pedals might be an issue so I tried plugging directly into the amp with the same results, on occasion. that is what's so frustrating. it's sporatic, and on some days everything is fine all day. then the next day it's like after ten mintues it starts acting up and the symptoms return.

The BIG issue is that my Marshall was damaged. So, what would do that? I could smell it frying and had to take it in.

The tube amp sounds like too much electicity is running through it at times and I can hear the tubes like, humming loudly. I measured the voltage comming through the outlet liek I said earlier and it was around 120v for an extended period of time. i was looking for surges but there were none.

Frying?
Well, the tubes can get really hot so it there's anything on them it'll get burnt off.
As for the noise they're making, if it's really loud you might want to think about changing the valves