Quote:
Originally Posted by rca2000
Not sure but I think it is an RE type of tube. The 21GUP22 is an RE
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What is the meaning of RE? So far I gather that it may be an RE and they didn't have a faceplate, not bonded at least. There simply must be some reason why Zenith used one of two different tubes of the same size within a single model year or more. It would be interesting to find out what happened....
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