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PostPosted: Fri Jan 19, 2018 11:11 am 
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Mark II

Joined: Mon Jul 31, 2006 11:34 pm
Posts: 58
Hi Guys,

I've noticed that when I change channels from my Lead to Rhythm on my Mark III greenstripe the gain on the lead channel decreases when I go back to it. It's not as full and sounds thinner. Also, when I switch from the lead to the r1 or r2 channels there a second or so of loud, static-y noise. Any thoughts about what might be going on?

Thanks guys!


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PostPosted: Mon Jan 22, 2018 4:26 am 
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Mark II

Joined: Fri Jul 28, 2006 5:58 pm
Posts: 104
Location: Europe
Sounds like something is wrong with the optocouplers for the channel switching. If you are not familiar with tube amp circuits best take it to a qualified tech.


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PostPosted: Fri Jan 26, 2018 11:18 am 
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Mark II

Joined: Mon Jul 31, 2006 11:34 pm
Posts: 58
Thanks for the reply. I’ve never even heard of these things so I have to find a good tube amp repair


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