Didn’t touch it Paul! That plug is simply not connected on the 4 pin Din plug I’m using. I only changed the speaker cable. Mysterious.When you changed cables around did that include anything to do with the wire to the preamp/preamps PSU?
It's a tremendous coincidence that this all failed at that time, and while shorting the preamp PSU should be safe, perhaps it triggered a cascade. Maybe worth checking the cabling regardless.
Impressive job on the 317 though. Work of art.
Good dayIt's a tremendous coincidence that this all failed at that time, and while shorting the preamp PSU should be safe, perhaps it triggered a cascade.