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Philco made picture tubes, from the earliest days, in the Lansdale Tube Plant. Tubes coded 260 were Philco. Picture tubes were manufactured in Lansdale and continued on the line to special conveyor-equipped freight cars, transported to the Philadelphia TV assembly plant and connected to the conveyor lines there. Basically the Lansdale tube line was connected to the TV assembly line via the railroad.
Ford sold the Lansdale Tube plant to Zenith in the 70s.
Sylvania, coded 312, was also a supplier, mostly for after market tubes.
Byran makes an interesting point that the Philco-built round color TV is probably the best chassis of the era. It had more solid state circuitry than any of the competition, and continued, with modest updates, into the mid 70s.
Don
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