JohnW

It's screwed into the board and into the chassis. I loosened and re-tightened. But perhaps the whole issue was shitty resistors?

That's what I loosened and tightened. Thanks again for all your patience and help. (not that we're done here, of course )

Undoubtedly. But this little victory makes further battles worthwhile. Thing sounds truly amazing. I think I'll keep it, and do what I can to keep it alive, for now.

Loosened and tightened the ground screw on Rectifier A and/or finally got a resistor that doesn’t suck. 1w resistors on the way just in case, though.

I was afraid you'd say that. New caps are on the way. I should likely just buy new transistors and diodes as well, since I can test resistors in the board. I almost want to pay someone locally to dig into this, because I'm in way over my head. But I'm stubborn af

Or should I just pull the rectifier A and B boards, unsolder every diode, capacitor, resistor and transistor, and test them individually?

Ok, so you're suggesting I remove the Red, Orange, and White/Orange wires from Rectifier A and then try powering it up again with the R9 resistor in place? Any idea how the board is grounded? Should I learn how to build a Dim Bulb Tester before I do this?

I read about a recap over on Audiokarma. Poster said they were like, 23.56 mm.

Should I just go through every board and check continuity from every solder point to every solder point? It looks like the lead spacing on the currently-installed 4700uF 35v filter capacitors is about an inch...can't seem to find a matching pair. Any guidance?

BadChile, any idea why it would start with 5-6 volts on the R9 resistor before it drops down to .7-.8? That's the only problem with this amp.

If you have links, that would be great...so far all I can find is sales demos and Rosie O'Kelly...which I haven't found particularly helpful.

Unless I'm mistaken (and I very well could be, I am obviously a novice here), I don't believe it has a relay when you power it up...at least I don't hear one when it starts...is there one in the schematics? I believe I read that there isn't one as well. Because if that's the case...not having one might be the source of our initial overload issues.

Sorry, Bill--yes, I checked D5, D6, D7, and D8. All were functioning.

The odds are with you. They were an hour from here. But I just went $2500 in debt for a pair of La Scalas.

There will be other deals.

Bump, still looking.

This wimpy mundane relic sounds amazing.

I’ll just replace the damned capacitors and eliminate the potential cause.😁

Will do, thanks. C4 kept going to infinity.

When testing resistance of the cap, what should I set my Multimeter to?

Was just shopping for new capacitors from Parts Conexxion. It's not like they don't need to be replaced, right? I'll pull the C4 and test it, but it'll probably be later this week. Here's my Parts Connexion shopping cart: will these work? https://www.partsconnexion.com/cgi-bin/sc/order.cgi?storeid=*20b7b4534d0a875b77f1157d6bb78322a865&function=show

Ok. I’m a bit done for the day, but I believe this is where we left off.

Diodes all tested functional, at l ast on the rectifier A board.

Ah. Not so fast. Went back out to the garage to listen to it and R9 fried again. So I’m guessing that initial voltage spike at power up is an issue. looks like I’m recapping sooner than later. I know I need electrolytics…any particular brand?

I don't think I mentioned some pertinent, important details: I bought this from some guy in Arizona for $200 who knew nothing about stereo gear. He sent it to me in an old Epson printer box with "EASTER" magic markered on the side, and the receiver was protected by laundry. That's right, no bubble wrap, no wadded paper, not even a blanket. Just old, XXXL tshirts, shorts, and yes...underwear. Three pair. I am not joking. I didn't check how well laundered they were, but there was a faint scent of detergent when I opened the box, and I'm going to tell myself that it came from the clothes being freshly laundered and that is the last thought I will give it, for obvious reasons. The box was taped shut with silver air conditioning insulation tape. The fact that the unit actually works is a miracle.