Quote:
Originally Posted by neon indicator
Most older TVs display lack of height (30/60 rather than 25/50) doesn't give the Frame coil enough time?
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No, it has nothing to do with the scan coils! What happens is that the field scan is initiated by a field sync pulse, so the scan starts at the top of the field and progresses down the picture, in PAL (625/50) the next field sync pulse occurs 20mS later but in NTSC (525/60) it occurs earlier, at 16.6mS, so the field flyback also occurs earlier than with PAL, thereby reducing the picture height to 16.6mS/20mS = 83%!
Regards,
Dave.