Hoffman 7M112 tabletop

[Eric H]

Phil did you try subbing the Horiz Output tube? Even if it checks good it might not work as well as another one.

As for the linearity I think some sets just aren't as good as others by design.

If you've ever seen old copies of Consumer Reports they would test them for linearity and overscan and show test patterns, some models, especially low end models, had lousy linearity right out of the box.