As this is my first post, hello to everybody!
Hopefully I'll bring some added value here...but more possibly I'll get:-)
I'm looking for Marstran transformer PT 1204-43 (dual sec.) for my JTM45/100 clone (Cariatone).
I'd like to have both option voltages - 490V for modern tubes and 560V for vintage GEC.
It looks like there is no stock at the moment. And another one I need also (1203-80)

I look at the Mercury M. - is there any chance to use their M-JTM-45/100P transformer as subtitution for 1204-43?
It's correct PT for JTM100...:
secondary, B+: 168-0-168 + 188-0-188 + 90V bias + 6,3V filament self leads.
Would pls someone comment how this would work?
Thanks and regards