OK...back to the amplifier. Next question -
Considering the power transformer filament winding is geared for 4) 6V6 AND 1) 6SN7, I'm going to go out on a limb and say it's probably not enough for 2) KT88s and 1) 6EJ7. So, I'm thinking to use the PT filament winding to power just the 6EJ7, then I have a couple 30VA 12.6V CT transformers. I would use one of these per pair of KT88s
Given the KT88 filaments are 6.3V, is there anything noteworthy to consider in wiring them up like this to the 12.6V CT transformer?
Is there/would there be any benefit to wiring with a specific polarity to the filaments, e.g. as shown by the filament pinout numbers on the upper or lower illustration?
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