I'm overhauling it for Arcanine. So rather than fill my PM box and keep it hidden, here is a public status update.
I started work on it today. As gotten screen shots:
As can be seen the grayscale was very yellow. I also had to tweak the chroma osc. to get the color bars shot.
I could not get setup lines with the service switch and had to resort to playing with the brightness and CRT bias switch to get them.....The blue was still VERY weak with it's control maxed (had to douse the lights to balance the lines with the G2 knobs)....I'm probably going to test the gun biases later to see if something is messing with the blue.
That got me here:
I decided to verify HV level on my probe. With the set running on 117VAC it's producing 23.5KV, which is within the 22-24KV listed in the sam's.
I removed the chassis and decided to look at the ruined power switch. The shaft of the vol pot/power switch on the donor CTC-20 chassis was 1/2" too short, and the switch was different so that was eliminated as an option.
Opening the original switch revealed that a piece of black phenolic (SP?) that connects the switch contacts to the shaft broke. Attempt to duplicate it failed due to limited tools and lack of knowledge of the shape of the damaged part.
I then remembered I had some spare pots with similar switch shells. None of my spare pots had the right shaft length so I tried to transplant the switch section alone. One had different guts that I ruined trying to adapt to the original. The second was identical to the original switch section and I was able to mount it successfully. It works well, and no one would ever think it was a replacement. The white piece on the original shaft in the picture is what the broken black piece in the original switch should have looked like.
Now that the grayscale is right and the power switch works again, it is on to other work.....Like changing original caps of types I do not trust, going over the vertical circuit, and some adjustments, etc.