AT>Plate voltage.  I don't know what the 70's Champs ran (if they were as
AT>insanely out of spec as the bigger silverfaces, for example).  I'd 
willingly
AT>give up 2 or 3 of my whopping 6 watts if it would extend tube life (or 
ake
AT>possible to buy new tubes to use in it).
My blackface runs between 400 & 410.  Normally that would be too high
but because it's cathode biased there's sort of a "regulating" effect
(for lack of a better term) that allows even Russian tubes to survive.
That said, I did put in a larger cathode resistor in mine to lower the
current thru the tube.  Didn't see to effect the sound.
 * SLMR 2.1a *
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