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Bigaudio
I looked at your schematic and wrote this just before you posted #5 above, but this still is a good way to resolve your problem.
Don't operate the set with only the Horiz Output plate connection removed for a long time, as that can overheat the screen grid and you will never see any indication of this happening until it is too late. Normally this won't happen, but since they ain't making these tubes anymore, it is a good precaution.
If the set worked after the recap:
Substitute the Horiz Osc, Horiz Output and Damper tubes and plug back in and see if the plates in the new tube get hot.
Then go to below.
If the set failed on the first power up:
Remove Horiz Osc and Damper (both could be shorted) and do a resistance reading as shown in the Sams for that section of the set.
If nothing suspicious, power the set up with Horiz Output and Damper tubes removed and see if the voltages on the Horiz Osc look normal. Then wrap an .01 capacitor on your AC volts probe and see if you get any AC on the horizontal output plate. (Yeh, this test would be so much easier if you had a scope.)
If so, see if most of the AC is also visible on the grid of the Horizontal output tube.
The grid on the horizontal output (no tube in socket) should not be more positive than the cathode.
If nothing suspicious has appeared so far, take a break and come back and recheck each connection in these circuits against the schematic. Let us know the results.
James.
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