Weird picture issue GE 805

[old_tv_nut]

Originally Posted by Chris K

The problem was in the yoke. It was intermittent going through in and out of even alignment when I tapped on the outside of the housing. I scavenged a yoke out of an 805 parts chassis and it works well now.

What you described sounded like some horizontal deflection voltage affecting the vertical or vice versa - easiest way for that to happen I could think of is a short between the H and V windings.