15-05-2024, 01:23 PM
(This post was last modified: 15-05-2024, 01:35 PM by boater sam.)
I note that it is a hand assembled triode. I can't imagine that there is much demand for a 2v filament PX4 even from the audiofools.
All 4 filaments look to be intact surprisingly. The PA20 has a higher output than the 2P which is supposed to be in there.
Though having a common control and chassis layout with the models 77, 63, 66 etc. the 72 has the addition of an RF amplifier first stage.
Does anyone have the circuit diagram for 72 or know which in which model the chassis is the same?
The dial cord is broken but I enjoy restringing these, am I a masochist?
All 4 filaments look to be intact surprisingly. The PA20 has a higher output than the 2P which is supposed to be in there.
Though having a common control and chassis layout with the models 77, 63, 66 etc. the 72 has the addition of an RF amplifier first stage.
Does anyone have the circuit diagram for 72 or know which in which model the chassis is the same?
The dial cord is broken but I enjoy restringing these, am I a masochist?
Boater Sam.
