Please help! The left channel has developed one or two popping noise coming form the speaker at times, not too loud but frightens me! I checked the bias of the output tubes and it is 0.34v with music. I that too high! Have anyone had this problems before? thanks.
Thanks for the responds, I have since set the bias down to below 0.31. So far no pops and fingers crossed. I think I should change the 2 small tubes too as they have been there for many years!
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