By a rather coincidental set of circumstances yesterday, I ended up with a Dynaco ST-70 tube amp for $80. It was a local deal so didn't even waste money on shipping. The fellow's house wasn't more than 5 minutes out of my way from a trip I already had to make that morning.

The guy said it was "As-Is" because it was blowing fuses. It turned out to be a pair of leaky caps in the power supply (about $4) and a shorted tube.

Of course I can't leave well enough alone. The thing was pretty much original except for a replacement to the "can cap" so I've decided to completely overhaul it. I've already got it completely disassembled and the chrome polished. Need to repaint the transformers but the big change is going to be a new driver board and power supply overhaul. That and the new tubes will run a bit over $200 but I'll end up with a great amp. (The chrome base on this thing is in as good of shape as I've seen on a Dynaco that hasn't been rechromed.)

I've still got some decisions to make. Can't decide if I want to try a conversion to 6L6 outputs or stick with the EL34s. Same thing with whether to stick with the original configuration or go with the lower power triode configuration. The latter choice can wait but I need to decide on the tubes before I order parts tomorrow or Monday.

When everything is done I'll post a picture of the results.