"Andy Evans" wrote

b) You can't carry an amp with all directly heated triodes. There are
separate DC filament supplies for each DHT. For a three stage SET amp
that's 6 supplies plus heat sinks. For a PP amp it's worse still. Try
lifting that lot of transformers. Two monobloks are possible but
potentially noisy with DHTs and in any case who wants to construct two
HT supplies when one will do.



You could also ask Phil Thingy (?) at Bluebell Audio:

http://www.bluebellaudio.com/

Last I heard he was into ersatz copies of big 2 and 3 part amplifiers and
may have a solution or suggestions for you..??