Restoring a RCA 21CT55

[etype2]

Originally Posted by old_tv_nut

Just had a thought - the blue DC restorer may be weak. This would cause the blue background to drift the opposite of the dominant color and possibly vary over the height of the picture. You wouldn't see this on a grayscale pattern.

We played with the background controls a lot. I don’t have professional test equipment, so I used the blue filter with the Video Esentials disk to calibrate. I know this is not the best way, at a disadvantage without proper tools.