Quote:
Originally Posted by old_tv_nut
Not much. The problem would be that vacuum tube circuits to select a particular line of the raster where something like VIR would be transmitted would have been far too expensive and failure prone to put in receivers. This sort of thing had to wait for ICs to be practical and affordable.
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The only thing we could have done is subcarrier phase reversal like PAL...It would have made sets a bit more complex buy was done in tube TVs. RCA did investigate the method but didn't adopt it (I'd guess they didn't deem the automatic tint correction Worth the added complexity).