Admiral 26X56 restoration

[robert1]

Originally Posted by bandersen

However, I did notice a strange issue. As I decreased the brightness, it dimmed more on the sides than the center.

You can get it down to where there is just a think strip visible in the middle.

I'm thinking the HV doorknob cap way be bad or there is some ripple in the power supply. There are still a few old electrolytics left. I'l tr replacing them first.

I believe that there is a bad electrolytic capacitor for the video output cathode bias that is bad. i've seen this before. if the doorknob capacitor is failing, there would be HV issues, but from what i see of the pics, this is more like a problem with the video output stages. i would venture to say that a total recap of the set will fix the problem.