Pooh Bear said:

Indeed. Notice the peanut-sized output transformer. Maybe a PA amp?

If those really are 807s in the output - certainly the top-cap fits the bill, I'd say
the output tranny was *way* undersized.

Probably an organ amp or something, the power tranny may had to feed
other circuits as well.

Maybe it's a 'starved plate' design ?

That's something else. Can't be applied to power amps.

--
Sander deWaal
"SOA of a KT88? Sufficient."