Marshall Valvestate AVT 20 Problem - help?

sonsofthedesert · 06-18-2008, 01:56 AM

Hi,
This is my first post on this great forum, any help will be much appreciated.

I just bought a used 2002 model AVT20, it sounds great and grungy for its size.

However when i increase the reverb control after about 3 on the dial it begins to hum/buzz. I did notice it in the guitar shop where i bought it, but though it was a shielding problem with the guitar I was demoing it with. I can live with it, but if anyone has any advice for a easy fix or any info for the same problem I'd be grateful to hear it?

RogerAF · 06-24-2008, 07:04 AM

Can't say for certain, but try checking the ground continuity in the cables between the reverb and the amp chassis--this assumes the reverb is in a separate box with an input and an output. Usually RCA type jacks/plugs are the connectors, sometimes the grounds can disconnect.

Hope this helps,
Roger

sonsofthedesert · 06-25-2008, 11:42 PM

Thanks for the info RogerAF, much appreciated.

I will open it up and check it - i'll let you know if I have any luck.

Cheers.

06-18-2008, 01:56 AM	#1 (permalink)
sonsofthedesert Junior Member Join Date: Jun 2008 Posts: 2	Marshall Valvestate AVT 20 Problem - help? Hi, This is my first post on this great forum, any help will be much appreciated. I just bought a used 2002 model AVT20, it sounds great and grungy for its size. However when i increase the reverb control after about 3 on the dial it begins to hum/buzz. I did notice it in the guitar shop where i bought it, but though it was a shielding problem with the guitar I was demoing it with. I can live with it, but if anyone has any advice for a easy fix or any info for the same problem I'd be grateful to hear it?

06-24-2008, 07:04 AM	#2 (permalink)
RogerAF Junior Member Join Date: Jun 2008 Posts: 7	Re: Marshall Valvestate AVT 20 Problem - help? Can't say for certain, but try checking the ground continuity in the cables between the reverb and the amp chassis--this assumes the reverb is in a separate box with an input and an output. Usually RCA type jacks/plugs are the connectors, sometimes the grounds can disconnect. Hope this helps, Roger

06-25-2008, 11:42 PM	#3 (permalink)
sonsofthedesert Junior Member Join Date: Jun 2008 Posts: 2	Re: Marshall Valvestate AVT 20 Problem - help? Thanks for the info RogerAF, much appreciated. I will open it up and check it - i'll let you know if I have any luck. Cheers.

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