well, I ended up rebuilding the PS but, the cap I'm using for the 2nd filter stage is still over-voltage, by about 75 volts. I'm wondering if I can use some mis-matched parts(just what I have on hand) to fix this up a bit.
like so...
electrically it should be the same as a 20uf cap... 22uf is 450V in series with a 220uf 100V cap to up the voltage handling. the 470k/100k resistive divider network should make sure that each cap doesn't exceed its voltage rating. I've seen this done before, and did it myself in the 1st filter cap position, but haven't tried it using 2 odd value caps/resistors.
I'm thinking that if it is a viable option, I can kill 2 birds with one stone and use the junction of those two resistors to elevate my heaters. I just want to bounce the idea off of someone else, and would love to avoid ordering mor parts, especially if I can use what I have.
secondly,
I've been poking around, and found a few ground loops, well 2 at least. one looks non-original(as I said, someone must have worked on this amp in the past
). but the other looks original to the amp. I'll try to describe it, but my head is spinning trying to modernize this sucker, while also uncovering some previous shoddy work.
so...4 input jacks...
all jacks are grounded at the chassis.
jack 3 has another wire coming from the grounded ring to another grounded lug of a terminal strip which seemed odd to me, though the wire wrap is there so it looks original.
compounding this all is the fact the V1 & V2 cathode resistors and bypass caps use the input jack rings as a grounding point.
sheesh.
if you read all that, thanks. and thanks to those who have offered me good suggestions for my earlier problems.
