Last Xmas, at my mom's house, this RCA B&W TV set with the weak CRT I used a Beltron on to make it strong.
Someone on this forum mentioned that CRTs with this done sometimes give out in a few weeks. The last couple of months the TV sat unpowered, and I paid Mom a visit just this weekend. So I turned the set on while I'm there. The CRT is still good. But I haven't put a week or two on it powered. It will be a while before I get that much time on it...