[dcl0]

Just an update-success with the width problem. I replaced the mica (or micamold) capacitor C77 and the 1 M resistor R84 in the circuit providing drive signal to grid 5 of the Horizontal output tube V19. I was able to get the picture within the screen by backing width control almost completely out and adjusting the drive control until it crowded the right side of the screen and couldn't be compensated for by adjusting the width control and the horizontal centering control.

Then an interesting problem arose after I turned it on a few times. The final time I turned it on, a crackling sound, then no picture, no sound, and just a grey raster that couldn't be brightened or darkened with the brightness control. The resistor R94 was getting unusually hot for the TV being just switched on. I pulled all the insides out, back on the bench and found that the new capacitor C4B 30uF 250 Volts was a dead short. I replaced it with one rated for 500 volts, and while it was on the bench, measured the surge voltage when switched on, it surged to 333 volts across that capacitor then relaxed to 180 volts. Its interesting that both the Riders and Sams parts lists call for a capacitor rated for 250 volts. But I've used it a few times since and no problems yet.