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The Westinghouse 15" color set is one of my favorites. Along with RCA, Westinghouse was one of the eraly developers of color TV. As early as 1952, Westinghouse was demonstrating a color set using R-Y/B-Y demodulstion, which most other manufactuers used within a few years. The model H840CK15 alos featured a ture phase locked loop color reference oscillator, using no 3.58 MHZ color crystal. One of the front panel controls is labeled "color hold". Interesting too that the tint (or color phase) contorl was a back panel control, not intended for routine customer adjustment. This implies that the circuit was much more stable than the program material turned out to be! It also has one of th most stable high voltage supplies of any of the 15" color sets fielded in 1954. Shame about the CRT.
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John Folsom
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