Bias for Mark IV B

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domglop78

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Dec 7, 2014
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HI EVRYONE AND MERY CHRISMAS 2022....

Good morning all
I am looking for photos or a plan to adjust the bias of my 6l6 tubes.
it is enough I think to replace a fixed resistance by an adjustable one...?
which ? what value? what power ?
Thanks for your help on this item.

Dom
 
I’m not an expert but IIRC the manual states that the mark iv needs no bias adjustment. There is a whole essay about it.
 
I believe what the OP is asking is for a mod to change his amp from fixed to adjustable bias. I don't have it.

Honestly this is the one change I wish all my Mesas had.
 

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