[ohohyodafarted]

Nice Job Walter,

RE: your issue with contrast and brightness. My CT55 does the same thing. I have never been able to figure out what causes this issue. Someone told me that the HV section is probably just not capable of supplying enough current when you drive the tube real hard. My set has a NOS flyback so I know that the flyback is not the issue.

I would bet that if you look at the HV level when you drive the tube real hard to the point where the picture pulls in, you will see the HV droping. I can drive mine so hard that I can cause the picture to almost fade away. My 21AX was rebuilt by Hawkey before they closed so it has very strong emission from the guns which easily can overwhelm the HV section.

I also have another issue that I never was able to track down. It takes about 15 minutes for the convergence to stabilize. I thought the problem was a leaky capacitor in the convergence chassis, but after rebuilding it, I still had the issue. I can speed up the stabilization by turning the brightness up real far and forcing the picture to shrink in and go out of focus. I don't understand the relationship between these issues, but after the set warms up it has a great picture.