Thread: 21" RCA B&W from 1955
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  #11  
Old 06-21-2022, 01:29 PM
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jr_tech jr_tech is offline
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Quote:
Originally Posted by dieseljeep View Post
It looks like a newer issue CRT that doesn't use a ion trap!
21AMP4B : Aluminized, no ion trap, according to my 1964 GE tube manual.

jr
Last edited by jr_tech; 06-21-2022 at 01:40 PM. Reason: add info
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