That is a good choice, and sort of what I had in mind. It would be cool if I could make it work on a more or less permanent basis, but I suspect I would have to do some serious modifications to it to make that happen like changing out the CRT with a more modern tube of some sort. (possibly an oscilloscope tube.) Unless it uses some pretty common tubes, I would be afraid to operate it very long. I would be especially concerned about the CRT.
Electronics is my thing.
The original WAS an oscilloscope tube, a 3KP4. They are nearly impossible to find these days, many people use a 3KP1, but that gives a green picture. Even they aren’t easy to find. All the other tubes are very common.
It might be an interesting project to fit a semi-modern solid state portable TV into the old cabinet (and leave the original chassis intact). There are plenty of those TVs (from Japan, Hong Kong, Taiwan, etc) around and they are cheap.
Another option would be a 7-inch TV using a 7JP4. There were many manufacturers and models of those, probably the best of them would be the Admiral 19A11, which had an actual power transformer (rather than an AC/DC set with series string filaments). Good 7JP4s are much easier to find than 3KP4s.