Thanks ! I wouldn't ask if I dint think something odd was going on.
I just ordered two P-P 8 watt transformers from Antique Radio Supply, the only place that seems to have them. The data sheet lists impedances, not DC resistance, so Im taking a chance that the 20 ohm difference spec'd for the two halves of the primary are not critical. The 41 tubes do not employ a phase splitter stage, but have an odd circuit where one G2 is to B+ and the other G2 via a 3.9K resistor with feedback capacitor to the other tubes' G1.
Reece, I think that partial open is correct. I pulled an output transformer off a speaker I bought for a Philco 42-1008, which had the original one under the chassis. Testing that one and the 42-1008s, both were open also
due to the tiny wires, dried up wrapping and loose leads allowed to move.
Old Coot, I must try that. I have a 240/120-6.3v filament transformer.