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Last night I reinstalled the vertical centering control with the added 470 k resistors and now all the centering problems are cured. The next thing was what appeared as a snowy picture. I went to check the 6AG5 and discovered a 6AU6 in it's place. My tube tester calls for a lock out on the 6AG5 pin two, no lockout on the 6AU6. Installing a 6AG5 gave me a picture better on this set than my other two! I'm still using the 7 inch tube but to say the least, spectacular!
Stabilizing the picture seems to be more related to the sweep tubes. Older types seem to drift more than newer. The vertical is dead stabile. The horizontal is to the point where it locks in about 25 seconds once raster appears and requires one adjustment in about 30 minutes.
Tonight starts the sound circuit repairs!
And more pictures!
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