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Originally Posted by jackson
I assume that you would not only obsolete all of the color NTSC sets by switching to PAL, but also the black and white sets in use too. NTSC came about partly because it was backwards compatable with B&W tv.
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Oh, they could have done a PAL system using 525i/60Hz scan rate. Think somewhere in South America has that. So B&W sets would still work. Existing color sets (NTSC) would get real confused on a PAL signal with a subcarrier at 3.579MHz, as the "V" or "Pb" chroma signal would be flipping polarity line to line. Reds would stay reasonably consistant, but blues would bounce between blue and yellow line to line, essebntially canceling out at distant viewing distances from the set.
The slight improvement PAL would then give wouldn't have been worth the penalty of obsoleting all teh existing color sets and studio equipment already in the field.