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More on this thread, about group delay. While the luma and chroma are still separate (as S-video) one can use long lengths of 75 ohm coax to introduce delay in a selected signal to make the luma and chroma match up on the TV set's CRT. Signals running inside coax have delays of about 1nsec per foot of coax. I used about 150 feet of RG6 to delay the luma to get the chroma aligned with the luma, as sen on the CRT. The chroma signal looked to be a bit too far to the right of the B&W, about 1/4 inch as seen on a 24 inch CRT. The 150nsec delay on the luma made it match a lot better. Only real downside is having a big spool of RG6 siting behind the set, feeding the luma into the video modulator.
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