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I just had a 2005 27" Sylvania pass through my hands that was Funai built. Cheap, cheap, cheap crap with a cheap, cheap, cheap picture. It only needed a vertical IC and 1 cap to get it back going, which seems to be a common problem on the newer CRT sets. Cheap Chinese cap fails which takes out the vertical IC.
Concerning delta gun CRT's: That would be an interesting Zenith if it did use a delta gun tube that late. The early '80's Zeniths that I've seen used a tri-focus inline tube. I have seen some late Zenith CCII 23"/25" sets from '79 that still used a delta gun tube and some RCA 19"/25" sets from '79/'80 that had a delta gun CRT. Sylvania/Philco also had some late run delta gun sets from '79/'80. I think the newest delta gun set that I've seen was a 25" Teknika (built by Wells-Gardner) from around '81 that was cable ready w/ remote.
Actually, delta gun CRT's started to be phased out by the mid '70's. Especially in the small (19" and smaller) screen imported sets. The oldest large screen inline tube that I've seen was in the 25" GE "YM" chassis from the mid '70's. It was actually a large neck CRT with the same style base as a regular delta gun tube. And, that whole chassis was a piece of crap; but, that's another story.
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