I went ahead and replaced all the transistors, and it works! Thank you Mr. Fahey for all the help!  -Dennis

The opamp is a TL072cp. Its in a socket. Q1 is mpsu07 and Q2 is mpsu57.

To check the transistors I have to take them out of the circuit, correct?

Pic

Pic

I'm back. I checked the PSU diodes and my meter reads .500 & if I switch probes 1.000 thats without pluging in the light bulb limiter. On the power caps with light bulb limiter plugged in I get 3.4v on one and less than a volt on the other. I also tried my ESR meter and it reads .1 ohms on both of them. I have more pictures too.

Speaker terminals:  -60mv  -20mv  Rail: +205mv  -3.7v

The bulb stays brightly lit.

I think that picture was too small. I'll try again.

OK,here's a pic

I actually have one of those light bulb limiter things. I'll dig my camera out and try to post some pictures.

Hello! I'm trying to fix a friends amp. It's a Pignose 30/60. He bought it about 6 months ago and worked fine, and sounded great. Perfect for band practice. He went to turn it on a couple days ago and it made a loud noise for about 2 seconds and tripped the circuit breaker. It doesnt have a fuse. I can't find a schematic. It's not one of the battery powered amps, and I'm guessing its from the 70's. I'm not a total newb, I've built a few tube amps, and modded a few pedals, but I don't know much about SS stuff or how to troubleshoot. Does anyone have an idea what it could be?  Thanks,  Denny