some basic questions after recap Emerson 637A

[init4fun]

It looked to me like it was loosing both horizontal and vertical sync ?

[CJVx]

Originally Posted by init4fun

It looked to me like it was loosing both horizontal and vertical sync ?

I think the loss of vertical is a byproduct of the horizontal issue, I see it is rolling sometimes during the freak out, but I think its triggered by whatever is going on horizontally.

[Kevin Kuehn]

Have you verified your horizontal hold control has a good solid carbon track? For how fast that jumps in and out, it seems as if there's a intermittent connection. Or possibly a mica cap intermittently breaking down, or even a socket or cold solder joint? And in what condition is the dag on that CRT, that is if it's relied on as the only filter for high voltage. I think it's ability to self restore is a clue that's an intermittent contact point.