Since I lost the chance to get the zenith television, I have decided to pull this project out of the shed and try to toss it together again.
It does work even though the CRT is weak and lacks contrast, but does get a bit better as it has been on a while.
It uses a 6EB8 for the video output / sync sep, looking on the sub chart, it;s said that a 6JT8 is a drop in compatible replacement, and on an audio site I saw... " Plenty of cheap tubes to choose from in that footprint, though - 6GN8, 6HF8, 6AW8 and more. 6LY8 and 6JT8 have more gain in the pentode section,"
And more gain in the pentode section may be just what this tired old CRT needs to limp along for a few more years of light use!
