Jon, Ed, Mark and everyone else, thank you so much! I had to go to work today, an "occupational hazard".
Tonight I clarified a couple of things. The neon stays on for a good 30 seconds, but I need a dark place to see it in, so my bad that I didn't see it before, apologies. Second, the noise comes from the middle of the PSU. I'd love to say from the trafo or the caps but it's too tight in there to tell, definitely in there. Sounds like both ends of the unit. Sorry for the lack of certainty. Voltages say tight, the ripple is of variable frequency across voltages if that matters, this with a vertical and horizontal unit inserted. There are snaps, crackles, and pops from the hv cable when wiggled so this needs further cleaning as well, but it sounds different.
