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The Set: Pete Deksnis's Site about the CT-100

Restoring a Vintage Color Television Set

Who Invented* Compatible Color Television?

1. (v.) To bring (a product or idea) into being:

THIS EXPERIMENTAL color television set was built for a December 1950 demonstration of the RCA compatible color television system. This set demonstrated for the first time RCA's use of a separate Y (luminance, or brightness, or black and white) signal and a chroma signal. Sometimes called bypassed monochrome, the technique was developed earlier in 1950 by the Hazeltine Laboratories of Long Island, New York. It became a major part of the NTSC system adopted three years later.

QUADRATURE MODULATION (QM) -- a technique that allows two chroma signals to be stuffed into an existing black and white television channel -- was not employed in this RCA set. QM was applied to color television by Philco, who demonstrated the application early in 1951, after this set was made. Quadrature modulation also became a major part of the NTSC system three years later.

Philco's application of QM to color TV:

THEN, BY MID-1951 the NTSC "proposed" some general standards based upon the work and demonstrations of RCA, Hazeltine, Philco, and others. It is these standards that became the basis of the refined and finalized compatible color television system adopted by the FCC in late 1953.


General Standards -- NTSC 1951 (selected examples)

* INVENT -- to produce or contrive (something previously
unknown) by the use of ingenuity or imagination.
Who Invented Compatible Color Television?
A combination of diverse elements
invented compatible
color tv...

Pete.

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