KCS109C Chassis Horizontal Issue (maybe!)

[Chris K]

Hi all. I purchased 2 cosmetically beautiful RCA 17 inch 17D8185 televisions last week. Both have strong 17CDP4 CRTs with excellent cutoff. The tubes run at a high 8.3 volt filament voltages.

The first one I have worked on has been completely recapped, controls cleaned and all tubes tested and working. They are all original tubes. I have a complete NOS tube complement on order and I'll replace all of them when they come. The picture is fantastic with deep blacks and wonderful grey tones. There is, of course, an issue.

I tried photographing this but I couldn't capture it. In my generator's crosshatch pattern, the horizontal lines are perfect...crisp and bright. The vertical lines from the top to the bottom of the screen have a funky anomaly. They look like they are made up of a very fine zig-zag pattern about 1/4" wide with maybe 10 zig-zags per vertical line inch. It seems to be a horizontal issue but I can't seem to adjust it in and there is only the horizontal hold pot to make horizontal changes. Does anyone have an idea as to what this may be and what I might do to fix it?

Thanks all!!

Chris