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Topic starter
24/10/2005 11:27 am
One of the power tubes in my vintage 30 no longer glows, I guess its time to swap them. My question is, do I need to rebias the amp afterwords or is it plug-n-play? Thanks.
24/10/2005 7:50 pm
I don't believe that amp has adjustable bias.
"A cheerful heart is good medicine."
25/10/2005 6:54 am
Some will have their own opinion when it comes to Biasing an amp. My opinion is that Changing power tubes does require at least checking it and adjust if needed. I recall that amp is a CLASS A cathode bias design, which you can change tubes and not need to be biased. However I recommend you have it checked and checked again a few months later to see if its within spec's. It does make a differnce on how the amp sounds and how long the tubes will last.
Joe
