The remote Zeniths seem to be more common that the RCAs...
I finally have color
I tried several (all testing good) 6EA8 chroma osc tubes, did the alignment, realignment, alignment with different tubes, resoldered the crystal a few times, and some other stuff, not quite sure what finally did it, I finally have no more moving color bars up and down the screen. I've had this same problem with every early color set I've ever had. With the exception of one CTC15 that I had that ate 6GH8s, once I got it to work it stayed working ... but what do you have to do to get these units to work properly? Take the chroma oscillator tubes out under a full moon, and recite the proper incantation over the tube while hopping on one foot and spinning counterclockwise 3 times!!
And I also crossed some wires I shouldn't and blew a fuse while I was messing with this, all I took out was a 1k resistor and the fuse, but the fuse has to be a weirdly shaped one I don't have
(so it's just bypassed for now)
I'm going to eat lunch, then touch up the convergence a bit, then I'll take some pics...