[dieseljeep]

Originally Posted by jr_tech

Check out the schematic on ETF (scroll down to 10" Philco) looks to me like a 7B5 driving an electrodynamic speaker in the set:

http://www.earlytelevision.org/tv_sc...ms_prewar.html

jr

I should've have known, as the set has a speaker grill.
I wonder how many of those strange tubes used in the sweep and HV are available. I see, they also used their favorite 5X4G's in the LV power supply.