[Arran]

Bob;
I hope your mistake was not in the front end of that T.O, those are not easy to get into? The tube pins are always numbered clockwise from the underside of the chassis, anticlockwise from the top, I have a Phonola where someone made that mistake at the factory on a 6K7 IF amplifier tube. Imagine this, the radio left the factory in 1936 or 37, and nobody caught the mistake until I was checking the set over in 2023, and it was not untouched, it had hit the service shop a few times for tube replacements, filter caps, and a few paper caps over the years.
What I was doing was trying to trace out the wiring to a bypass condenser block, so as I was following the schematic I noticed that the cathode and suppressor grid were supposed to be tied together, the cathode was above B- because it had a cathode resistor/capacitor combo, but the suppressor grid was tied to chassis. So I looked through the catalogue of other Phonola sets from the same year, and all the others, including my 32 volt one, were wired with the two elements tied together. I'm guessing that the set must have played that way, but what that did to the life of that tube I'm not sure, it was a replacement tube and IF amplifier tubes are usually long lived.
Regards
Arran