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Sorry for the delayed responses. I have run the set in a dark room with the shield removed and there is nothing visible. There is nothing in the neck of the tube when it is arcing. Setting the brightness just below normal displays a good picture. As the brightness is turned up slowly a small tear flashes across the center of the screen and the picture will roll one frame. Turning it further up causes the center of the picture to break up as it upsets the horizontal and vertical oscillators with the usual results. It will ultimately bloom. If I can get a screen shot I’ll post it. The HV regulates fine and current readings are within range even when it starts to bloom. Everything in the horizontal circuit from sync takeoff to output checks out correctly. I plan to pull the CRT completely out to check for cracked aquadag and anything else I can find. This CRT tests as new on all guns. I may ultimately re-assemble it and leave well enough alone since it doesn’t seem to affect current readings and the flyback runs without signs of overheating. Thanks guys and wish me luck.
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