Quote:
Originally Posted by old_tv_nut
Yes, my first thought was NTSC demodulator on PAL signal - the R-Y cancels out due to alternating phase of the signal without correcting phase switch in the R-Y demodulator.
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It is Simple PAL. I.e. an NTSC demodulator with alternating R-Y signal. Here are the schematics:
http://fernsehmuseum.net/kuba/img/CK211Pschematics.jpg
Kind regards,
Eckhard