Philco Predicta Princess Focus "Control" - Videokarma.org TV - Video

Jon F · #1 07-09-2015, 11:37 PM

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!

Tom Albrecht · #2 07-09-2015, 11:46 PM

That's about what I've seen on Predictas as well. Is your focus reasonably sharp? I haven't really had any focus problems with Predictas, so it seems this particular capability is not really needed.

decojoe67 · #3 07-10-2015, 04:19 AM

I had few Predicta's through the years and never had a focus issue either.

DaveWM · #4 07-10-2015, 07:09 AM

weak CRT will make for poor focus.

bandersen · #5 07-10-2015, 11:05 AM

I'll go broader and say that I've not noticed much difference in any CRT that used electrostatic focus. They often use a shorting strap on the base so you can either connect the focus to G2 (around 400v) or G1 (around 0v).

Jon F · #6 07-10-2015, 11:22 AM

Thanks guys, the focus isn't bad, just no 630ts or anything. I'll just connect the lead to ground and call it a day.

zeno · #7 07-10-2015, 02:37 PM

Focus jumpers almost never make a difference. Usually either
the set is by nature that way or the CRT is a tad weak.
If you run the set in a dark room with the brite & contrast
way down & it looks a lot better its the CRT. The risk of
rejuvenation or a brightener are not worth it til things get
really bad on a set like this. Most will ooh & aah about the
styling & the fact that it works anyhows.......

73 Zeno