05-09-2018, 06:01 PM
As easy as looking on RM, the 46-420 code 128 does indeed use 50B5 & 35Y4... No schematic though..
Except for socket & their wiring connections won't be any different than one that uses 50L6 & 35Z5.. Same tubes different package..
https://www.radiomuseum.org/r/philco_46_...e_128.html
Except for socket & their wiring connections won't be any different than one that uses 50L6 & 35Z5.. Same tubes different package..
https://www.radiomuseum.org/r/philco_46_...e_128.html
Tom