Weird picture issue GE 805

[Chris K]

I'll start by saying the threads I have posted regarding horizontal issues on multiple TVs have all been resolved. My Admiral, Crosley and Hallicrafters projects are done. Even the Crosley misalignment of sound and picture with the continuous tuner got dialed in with everyone's help here. Before I dive back into the deep Dumont RA-103 rabbit hole, I want to get the GE 805 and its problems off my bench!

I have, what I think is a weird vertical deflection issue. The left side of the picture is about 10%-15% less high than the right hand side of the picture. I'm pretty certain the problem is with the bottom of the image. When I run broadcast, test patterns etc, the top of the picture is straight across the screen with no distortion. The bottom, left corner of the picture isn't deflected down enough and there is a straight, angled image lower border of the picture down to the right side picture corner. It's there with the 10BP4 and the 5" technician CRT that doesn't use the ion trap or focus coil. The yoke resistors all ohm out fine and the yoke's 47pF mica cap is spot on and isn't leaky. Sometimes, when I tap controls, tubes, the yoke etc. A La Shango, it snaps in to full, symmetrical vertical deflection but it doesn't stay that way long, maybe a second or two. Has anyone encountered an issue like this?