Getting closer-I can't quite get the image to fill the screen, and focus is a tad soft at the very fringes, but overall acceptable viewing from a few feet away. As the tube is a rebuild, it just may not be possible to get a perfect image from it. Also has a purple stain burned into the center phosphor, about the size of a half dollar.
Cured the hum in the audio (bad brand new lytic), and then started testing tubes to see if one was weak, and found that a 12AV7 had been used to replace the 12AT7 Noise Limiter/Audio takeoff stage. This was largely responsible for causing the poor audio, as well as some low frequency video smeering, and probably didn't help with the Hor/Vert locks, as they both function much better now. I still am getting some static in the image, cleaning tube pins helped, but I will have to pull the tuner apart and scrub down the ch. 3&4 strips.
I kept it on for 2 hours, and other than adjusting the vert twice in the first 30 minutes, it behaved nicely:
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Just curious: This set uses some odd tubes. I know Zenith used different tubes in their radios and tvs during the 60s, had they started this practice earlier? I see a 6C4, 6BN6s, 6CB6s, and a 6BF5 audio output. I replaced several of these from my stash, and the only ones I have are all Zenith branded replacements.