Quote:
Originally Posted by earlyfilm
...To see if there is an uneven coating on the CRT (unlikely, as your first picture in the above mentioned thread does not show this problem) is to intentionally throw the horizontal out of sync and see if the extra brightness in the center remains. (If it remains, suspect CRT.)
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Um.. (discounting the CRT) if the xtra brightness in the center remains unchanged, it would mean it is sweep-derived (ie., horiz getting into the video).
It wouldn't matter whether the horz is synched to the station or not.