I've got a 1990 JCM 800 model 2210 that makes quite a buzz with the reverb on full and all other controls at zero. The reverb ois working, it's just buzzy. Footswitch will kill it, pulling V3 doesn't effect it, but pulling V4 does stop the buzz. Different tank, same thing. Grounding the V4b grid actually makes it worse.
I think it is less after hitting the connections on V4, but I am not 100% on that. I know it seems kind of odd to turn the reverb on a Marshall up fully and worry about some buzz, but the guy runs it with a full stack and says it is in his face.
Any ideas?
http://www.ampwares.com/schematics/m..._100w_2210.pdf
I think it is less after hitting the connections on V4, but I am not 100% on that. I know it seems kind of odd to turn the reverb on a Marshall up fully and worry about some buzz, but the guy runs it with a full stack and says it is in his face.
Any ideas?
http://www.ampwares.com/schematics/m..._100w_2210.pdf
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