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In a trade magazine from about 68-69 I saw a clipping announcing that another company was starting to produce color picture tubes, and it went on to list all of the American companies that were producing them. As I recall, at the end of the sixties the list looked something like this:
Admiral
General Electric
National Video (Motorola)
Philco-Ford
RCA
Sylvania
Westinghouse
Zenith/Rauland
Not long after that, Channel Master was producing 100% new CRT's, per another article I've read.
I believe National Video went bust, maybe before the sixties were over. Philco-Ford sold it's tube plant to Zenith. The Admiral plant was dismantled sometime in the seventies. Westinghouse got out of the TV manufacturing business about 1969-70 but continued making picture tubes well into the seventies; I know Motorola was a customer and I think Magnavox. I suspect General Electric continued production until around the time they bought RCA. Sylvania was rolled into North American Philips. Zenith shuttered it's picture tube operation in the 90s after that debacle with a lemon tube design. North American Philips and RCA were still cranking out larger picture tubes into the late 90s and maybe early 2000's.
As usual, too much information. Some of it might even be right!
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Bryan
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