Video inputs Tube TV

[Alex KL-1]

BTW... the original sync separator is poor with the video input amplitude?
Or is difficult to use/unstable with mod?
I had some issues with vertical when injecting video input in some old TV's, due to some issues. Some sets needed some different layout/some changing for sync separator. But the one most perfect one resulted to be a tube one, since sync separator is after the video output. Textbook perfect sync separating (for a single stage), with a 6CS6.
For my delta gun one, from the TBA IC's era, I used the LM1881, due to horrible verical behaviour of the original sync separator.