Unknown amplifier with Philips F443 pentode (Gezocht)

door rvervoort , 16.10.2023, 13:26 (405 dagen geleden) @ adamgol

Yes, the output transformer is one of the type P20.
Outut transformer class B for penthodes in push pull for perma dynamic loudspeakers.
I found two diagrams in a 1932 B&O catalog.