05-13-2015, 01:10 PM
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VideoKarma Member
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Join Date: Jul 2010
Posts: 7,562
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Quote:
Originally Posted by Findm-Keepm
The manufacturer number, or Electronics Industries Association (formerly RETMA) number, usually 3 digits, and usually precedes a date code. There are over 1100 EIA codes, but only one for the CRT - usually an RCA ( code 274 ), Sylvania ( code 312 ), Zenith ( code 343 ) or Clinton ( code 1240 ). Others such as Sony, Mitsubishi and Sharp made some tubes, but they are clearly marked.
Cheers,
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The Zenith CRT's were EIA source 1101 for Rauland. 343 was for the rest of the set. 
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