6l6 bias problem

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6l6 bias problem

Postby Thestoff on Wed Feb 18, 2015 3:44 pm

Hi guys wondering gift u could help me out i recently biased my bugera v55 using a bias probe and the original Tubes I biased the first tube to 42ma but when checking the second power tube it is reading around 13ma higher than the other so one is reading 42ma the other is at 53ma does anyone know what might cause this or how I could trouble shoot the problem... Also I retubed it a while back using JJ's and one red plated on me and died.. Im starting to think it might have something to do with this issue I'm having. Thanks for any help u can provide

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Re: 6l6 bias problem

Postby PeterS on Wed Feb 18, 2015 5:33 pm

Swap the tubes between sockets and see if the current readings go along with the tubes. If so, you just have mismatched tubes. If not, there's a problem with the amp.
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