#1
hey guys.

so heres the deal.

I recently invested in a rather fetching Marshall Valve amplifier combo. Buttt.... it's kinda screwed.

the trouble is that it keeps letting out a high pitched, loud, almost feedbacky kinda sound at random that doesn't stop till you turn it off. This is regardless of how loud I'm playing or indeed what channel I play through.

My guitar(s) are all fine and there doesn't seem to be any problem with my leads, (at least, I think they're alright).

any ideas as to what the problem might be, gents? (or, indeed, ladies)...
Originally Posted by Eric 666
if I had sex with my clone...I'd have a big dick in my ass.

Quote by Final !mpact
I mean 'Really Retarded' in the nicest way possible by the way.

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#3
educate me, man. I'm a bit of an amp noob.

thnx, btw.
Originally Posted by Eric 666
if I had sex with my clone...I'd have a big dick in my ass.

Quote by Final !mpact
I mean 'Really Retarded' in the nicest way possible by the way.

Member 37 Of The RHCP fanclub.
Bruce Springsteen Fan?
My Myspace
#5
Is it full valve or half? As you said Marshall I'm guessing its either a AVT or a JCM?
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#6
Marshall AVT.

how much does it cost to have them changed out?
Originally Posted by Eric 666
if I had sex with my clone...I'd have a big dick in my ass.

Quote by Final !mpact
I mean 'Really Retarded' in the nicest way possible by the way.

Member 37 Of The RHCP fanclub.
Bruce Springsteen Fan?
My Myspace
#7
well you could do it yourself and just buy the tubes but its not as easy as just swapping one for the other, you gotta bias them, but if that just made no sense to you then i'd just pay the cash and have someone at a shop do it....to me it would be better to just pay the cash for tubes that'll last work a while than try to do it and screw it up yourself
#8
Quote by wangmaster
Marshall AVT.

how much does it cost to have them changed out?


Thats not a tube amp, its a hybrid, and AFAIK the tube(or is it tubes?) wouldnt be much of an issue in a hybrid.
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#9
It has one tube I think. It may be microphonic. Its possible that's the culprit, but other things could do it. I'd take it to a tech before I bothered to replace the tube.
Unfortunately it may be time for a new amp.
#10
possibly try a new valve in the pre amp (get a new pre amp valve, and replace it - no biasing needed on pre amp valves). otherwise surely you can take it to the shop where you bought it from?
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#11
yeah dude if you really dont know what you're looking at then just take it in, its not worth trying to fix it yourself and messing it up for good, plus they arent gonna charge you to take a look at it
#12
^ I like the freeness idea. (y)
Originally Posted by Eric 666
if I had sex with my clone...I'd have a big dick in my ass.

Quote by Final !mpact
I mean 'Really Retarded' in the nicest way possible by the way.

Member 37 Of The RHCP fanclub.
Bruce Springsteen Fan?
My Myspace