The set works very nicely now. Its only shortcoming is that the picture is not as sharply focused on the left side of the screen. I find the focus uniformity is a little better with a brightener on the CRT, so I think the cathode center is a bit worn out. Not sure why this happens more on the left side of the screen, but it certainly is better with the brightener. The center of the screen is very sharp with or without the brightener. I will soon transfer this 20BP4 CRT to my Westminster, and will see if the behavior is the same, which should clarify whether the problem is the set or the CRT.
