[Adam]

Getting back to this set again... Looking at that manual, I can tell that my problem was that the p-p voltage of the waveform at the grid of 1st sync (V103B) was about 2x too high. That's what my extra capacitor was correcting. But I noticed I had the contrast control all the way up, with the contrast turned far down - I had the opposite problem, the signal getting into the grid of V103B was barely there at all - which also results in no vert sync. There was only a very narrow range where I had no sync problems.

The contrast control measures 10k across - it looks like an original part, but the schematic says it should be only 4k. It is an RCA part, but the part #'s don't match.