Zenith'
please look and see what chassis number you got that from?..according to an original RCA shop manual dated '1957 the early production power trannies had the two 5U4's tube sockets mounted in the top of the transformer case like an old Philco 37-60 radio's tranny..what's listed in
Steve McVoy's website link..mine's is the later version that didn't have that twin Tube rectifier setup in the case,..mine uses 2 "Top-Hat"style diodes on terminal strip..with one solid red on the bottom end of the strip and the Red/Green tracer soldered in between the 2 diode top end with a 0.1uF@ kilo-volt ceramic cap to ground,..both are still tested good

is your's like mine