While this might work in principle (think a LTP with an OT having the floating primary connected between the plates), the plate resistors would eat up most of the availabe output power.What Im not quite sure about is whether the center tap is actually required for a push pull amp. E.g. suppose there was no center tap, but the HV DC was fed through, say plate resistors back to the power supply. The DC voltage would travel to the plate, across the OT primary winding to the other tube plate. Wouldn't this effectively be the same or similar circuit?