I worked on this not too long ago and after returning it, the owner was still having the same issue.
Turns out the pass transistor(tip3055) was weak and failed. I had tested it both in and out of circuit and for leakage and it was okay at the time.
I didn't have any TIP3055s but I do have a lot of 2N3055 so I used one of those. It's been a while and first mixed up Base and Emitter. You'll see.
This is a cool base unit amp. Roughly 150-220(am-SSB). Pegged my 100w meter.
Anyway, Thanks for watching!
\o/
14 окт 2024