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The CTC-5 in the photo, with the 21CYP22 includes RCA's glass to metal conversion kit which included (among other things) a later style yoke cover to secure the yoke to the tube's neck. The 21CYP22's date code is an indicator that that CRT started life as a factory installed CRT in some RCA chassis, probably an early CTC-7. In the 55 years since its 1956 date code, who knows where it's been?
Last edited by Mal Fuller; 07-26-2011 at 09:40 AM.
Reason: clarification
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