BTW,
After the set was working just fine on the bench for about 2 hours, I heard a pop and the picture looked like this. Linearity control was able to fill the screen but linearity was even worse. Height control didn't do much. Changed a few resistors to no avail. I tried a substitute cathode capacitor on the 6S4, thinking maybe it went south. I was disgusted so I let it sit for several weeks.
Look at the voltages of the vertical section. The problem was staring right at me but I didn't see it. The voltage on the plate of V401A, the Oscillator was 175 Volts instead of 100 Volts. The next key was rotating the height control did not change the voltage. Hmmmm.
Long story short, one of the guys mentioned tin whiskers. I took out the 2.5 meg height control and cleaned it up. Problem solved. Must have had whiskers!
Now, it works just fine. Just a heads up for your