50Hz Transformer?

[Electronic M]

If that is a 50Hz unit it should run very cool at it's rated load on 60Hz.

The amp idea sounds like a fun project. I've been working on an output transformer-less tube amp project for a while now. I adapted an audiophile design to use some cheap compactron sweep tubes as the outputs. IMHO It sounds better than my tube amps that use output transformers. Though, until I get bigger lytics and possibly a hefty transformer with a 220V secondary so I can switch my PS circuit from a doubler to a full wave bridge, it has very limited output power.
I'm basically broke right now, and my design is just a rats nest of mid air connections in the process of being refined into something that I'll like well enough to build a quadraphonic amp chassis based on...once I have the funds to proceed.

Yeah, I've spent too much time reading over at AK.

[old_coot88]

The size of the iron in that looks more like it's a 25Hz. In any case, a 25 or a 50Hz transformer will be very happy on 60Hz. But not vice-versa, ie., a 60Hz unit will overheat on lower line frequencies.