Quote:
Originally Posted by dieseljeep
When you saw a 21" set with two 5U4's, it generally was a higher performance model. A lot of mid 50's RCA's were like that. The only thing that was a problem was that lousy 21AP4 CRT. I think the 1954 model year, they went to glass CRT's.
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Or P-P output tubes for the audio! Some of the higher end late 50's Zeniths had the claim as being "fringe" reception sets as well as some models with two rectifiers.