[radio nut]

Mine IS shading and image distortion, but I just realized what " might" be the cause.
In the high voltage cage is a chassis mount resistor that went bad. I installed a high wattage brown resistor in there and it is just kind of sitting right next to the damper tube. It can be bolted to the chassis but since there is not a hole in the metal near by I did try to solder it to one of the old chassis mount resistor pins but the solder will just not take to it.
the end result is it is very close to the damper tube. I thought about putting it under the chassis but do to its heat I figured it would be better left in the high voltage cage. If I can get some sleep I will move it around and see if it helps or makes the problem worse. The horizontal hold is what needed adjustment after tube swap.
I did readjust the horiz. drive and it does affect the picture but not this issue.
From an earlier post I noted that I had lost the shut off dot, since the tube swap it is back.