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Scratch/crackle on certain notes...

frazettafan

frazettafan

New member
Joined
Oct 28, 2006
Messages
4,072
Just recently when playing through my 20W Plexi head I hear a harsh crackle/scratchy noise through the amp on certain places on the fret-board(there is no fret buzz on my guitar). This didn't used to happen and it seems to get worse the harder I play. At first I thought it was a bad earth but it's getting louder....

It tends to do this mainly on the high strings and I imagine it's a tube problem?

As an I'm amp thick-oh, any advice, suggestions or help would be greatly appreciated.

Thanks a lot.
 
Ad_02Std

Ad_02Std

Active member
Joined
Apr 12, 2005
Messages
5,055
Sounds like pre-amp valves to me. There are other reasons why you might get a crackle, but I'd check out the pre-amp valves first.
 
philip_m

philip_m

New member
Joined
Feb 22, 2007
Messages
487
probably only corroded sockets.

wiggle the preamp tubes a bit, if it crackles, turn off the amp, let the tubes cool of, then use some DeoxIT on the feet and sockets
 
Doc Sausage

Doc Sausage

Well-known member
Joined
Nov 21, 2006
Messages
1,708
Huh? Seriously, what worked? I'm having Blues Deville 410 issues - as in, one pop, some sizzle and scratchy notes on the clean channel. Pre amp tubes???
 
MikeSlub

MikeSlub

Administrator
Joined
Jul 15, 2001
Messages
15,170
Could also be a bad speaker. I've had bad luck with Webers the past few years. Recent set of Blue Pups with the sizzle/buzz on note decay. Not buying them any more. :hank
 
Dreadnaught

Dreadnaught

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Joined
Feb 26, 2004
Messages
442
Do you have a spare tube set? If not, you should, just for backup and times like these. I had this problem once and it was one of the main power tubes. If you have a spare tube set, replace each tube one at a time and see if you can resolve the problem. Return the old tube of each successive attempt that does not correct the problem.
 
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