I was worried I may have mixed up A and B, though I had checked myself a few times. Was wondering if perhaps Stromberg decided to use opposite nomenclature, even.
Lacking a butt set (I need to get one at some point!), I re-punched the power pairs on their opposite rows on the block, and still had the hum.
I then took a quick peek into the power supply, and found what looks like a leaking capacitor. I would suspect this is the cause; if not, it's certainly an important aspect to get fixed. Photo linked here:
[img]
https://imgur.com/a/7KSaFIN[/img]
I have an identical KSU in the attic...I think I'll start by checking that one over to see if the caps look okay. If yes, I can swap it in quickly and test things out. If not, I'll have to disassemble and get the capacitor specs.
Thanks for the reply and advice!
