Philco Predicta Princess Focus "Control"

[Jon F]

Has anyone tried to adjust the focus on their Predicta Princess? Mine is decent, but I thought I would try to dial it in. In the sams it says you can vary a lead from a few voltage points and keep it on the one with the best focus.

I found the lead near the rear of the chassis, on the bottom of the connector coming from the picture tube. Whether I connect this to ground, nothing, or short to pin 1(of the connector), its makes absolutely no difference in the picture focus. Is this normal? Am I missing anything?

Thanks!