Picture streaking

[Tom Albrecht]

Originally Posted by old_tv_nut

Hmmm - maybe the peak whites are drawing grid current on the CRT, and affecting the vertical grid voltage of the vertical output?

Hey -- I think you guys are on to something here! I've noticed that both the brightness and the contrast affect this bunching effect in sets that have it. Grid current in the CRT would indeed correlate to that. I'll have to put one of my sets that show this problem on the bench and go after it when I get a chance. I wonder if I have created this problem by adding my own blanking circuits to certain sets?