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How do I set/adjust the bias on my tube amp?

New to tubes here. I couldn't find anything on the site on this. How do I adjust the bias for my 300b amps. What guage do I need? How do I determine the setting for the tubes I have? (Electro Harmonix).
Thanks
myraj

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myraj OP
351 posts
 
Herman & Trelja,
It is a pair of custom made 300B monoblocks by Kevin Brooks. There appears to be a bias adjustment screw by each 300b tube.
Your comments and help are appreciated.
Thanks!
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