Ctc-7aa

[IsthmusTV]

Thanks, Phil, Steve and Bob, those are all good suggestions. I did try static convergence first, and I could get the blue dot to move only so far. The lateral positioning magnet did have a large effect on the static convergence, but it's very loose when I rotate it. Is is possible that I need to reposition the convergence yoke?

I think I'll back off for a while until I get a degaussing coil and can preform the purity adjustments.

-Clark

[Ampico-kid]

Originally Posted by IsthmusTV

I did try static convergence first, and I could get the blue dot to move only so far. The lateral positioning magnet did have a large effect on the static convergence, but it's very loose when I rotate it. Is is possible that I need to reposition the convergence yoke?
-Clark

If you pull the sliding magnet out of it's respective track for whatever particular color is giving you grief, and rotate it 180 degrees and then reinsert it, that might give you the movement that you need to align the beams.

You certainly can move the convergence yoke around to find the most effective position for it. Sometimes just a slight rotation right or left will bring things more into alignment. And as was mentioned by Steve, before you go any further...get your hands on a good degaussing coil and get the purity set up properly.

[IsthmusTV]

I finally got a degaussing coil which definitely helped the situation. I tried another stab at a rough convergence and this time I got much better results:


Here are a few screen shots:






As you can see from Dorothy's purple hand, I still have purity issues to deal with. I have also been experiencing intermittent horizontal jaggies (I don't know how else to describe it). You can see it in the screen shots to varying degrees. It's probably from a bad maroon drop cap from among the 20-30 that I have yet to replace. But overall, I'm very happy with how this set is shaping up. I ran it for over four hours straight last night (watched the Broncos & Patriots) and while the power transformer got pretty warm, it was never too hot for me to keep my hand on it. I still haven't measured the HOT cathode current or the HV. But they are high on my list of tasks left to do.

-Clark