Well Paul, I hope you've made some progress with your 1060. After some bonehead moves on my part, I'm in a very similar boat. Last week I had the amp board running great after replacing every component with new parts. Yesterday, I completely toasted R753 in a fiery SNAP, SNAP complete with much magic smoke. You can see the aftermath in the attached photo. I plan to do a little more cleanup of the board and seal it with epoxy before replacing the resistor. The fire also took out R721, R713, C703 and I'm guessing H709 is toast from whatever caused the resistor to burn up. I chalk this blunder up to 1 of, or a combination of 3 things:
1. I over voltaged the amp board when adjusting the pots. My supply voltage at J709 was 71.2 volts, so
as per rule of thumb I adjusted voltage at J713 to half the supply voltage, or 35.6 volts. Maybe this
was too much for the circuit to bear?
2. I depopulated about half of the preamp board in anticipation of my next phase of this build. Probably
a really stupid idea to fire up the amp with the power leads still connected to the preamp board in this
state. Maybe this further unbalanced the supply voltage going to the amp board?
3. I connected a standalone preamp to the amp section to test for any noise in this section after my
rebuild of the amp board. In my hast to hook up the preamp I believe I swapped input for output on the
preamp. Not sure if this would effect anything as far as R753 exploding but nevertheless, after running
for 5-10 seconds it did just that. The preamp I used is a DIY deal I assembled a few months back. It
had preformed well with a class A amp I had built but I'm thinking there may have been a compatibility
issue with the 1060 or it was mainly because I hooked it up wrong.
So after collecting myself I'll be putting a mouser order in for a few new parts plus everything else I still need for the preamp, tone boards, and phono board rebuild. I can say I got a little too confident in my abilities up to this point. From now on I will play it safe, section by section, and not introduce any outside factors like not fully tested DIY components. Hope others can learn from my mistakes as well.
Again, Paul, hope you're having a bit more luck with your 1060. Would like to hear an update on any progress you might have made.