SCA 35 success!
The saga is complete... for now. Got the new transformer from Triode and wired it back in the other day - still working like a charm and no more hummm. It's great to have a working phono section again so I can listen to yummy vinyl.
The SCA has a Tape Out channel so next I'm going to send that thru a pre-amp to my ST-35 and power some remote speakers. And so begins my quest for a fuse holder that will fit the ST-35...