This is an old amplifier that Ii used for many years up to 1996 when I moved to Calgary.
It used to put out about 800 watts being driven by an Icom IC-701, It was home built
from an article in CQ around 1961.
I didn't build it.
The power supply was also home built at the same time, puts out 2500 Volts DC.
Has a problem that's probably trivial but I can't fix it. (Too much DC for my knowledge)