Quote:
Originally Posted by Steve McVoy
The field sequential and NTSC systems are completely different. You would see nothing but a jumbled mess on a CT-100 if you tried to watch field sequential. Horizontal scanning rate on the CBS system is 29,150 Hz vs. 15,575 for NTSC. Vertical scan rate for the CBS system is 144 Hz vs. 60 Hz for NTSC.
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Once heard an urban legend that some very rich baseball fan was willing to pay whatever it cost to have a B&W TV converted so it could receive (in B&W) the CBS colorwheel system, so he could watch the World Series, which was broadcast in the CBS colorwheel system. Later on, I heard that they never did the World Series back then in the CBS colorwheel system...
In any event, all you'd need to do is modify the timing circuits on the vertical, and the horizontal. Years ago I worked at a small company that made "cameras" for converting video to hard copy on Xray film. And we did a prototype 525p progressive scan monitor by modifying a more normal 525i interlaced B&W display. Forgotten all the details of what we needed to do to the horizontal output stage, but it wasn't that difficult. What does happen is that the flyback time stays about the same, but the forward scan deflection goes much faster. Which would make for more percentage of "overscanned" left and right edges of the video image being lost.
You's still have flicker in any highly color saturated parts of teh video image.