09-08-2016, 05:05 AM
With regard to the audio interstage transformer that is missing, it would be nice to know what the original DC resistances were of the windings. I've been looking at the service information for other sets that used a class B or class A-B power output and not only was the interstage between the driver tube or tubes and the power outputs a step down transformer but the DC resistances were quite a bit lower, such as under 1000 ohms for the primary and the secondary. The RCA schematics list the values, the Philco ones don't for some reason, they just give part numbers.
Regards
Arran
Regards
Arran