Marshall valvestate 8040 volume dip

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Posted by robban [ 213.89.80.19 ] on December 09, 2007 at 11:19:00:

Hey!
I'm having some problems with my 8040. Recently I noticed that every 20 to 30 seconds or so, there is a big volume dip. It lasts for maybe 2 or 3 seconds, then the volume goes back to its normal level. I replaced the pre-amp tube but the problem didn't go away.

Any ideas?

thanks
//rob


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