Originally posted by soundmasterg
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Perhaps one of the options for troublesome EL34 amps that should be considered is conversion to 6L6, like Marshall had to do in the 90's.
(this would be for those who do not want to spring for real NOS, which I guess I would consider pre-90s)
As far as the discussion about why modern tubes seem so crappy, I will add my pet theory about so many amps modded to adjustable bias; and then adjusted hotter to meet some mythical % figure because the designers didn't have a clue what they were doing with their cold bias.
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