Thanks Rich, I'd appreciate that info.
Unfortunately, this one's a goner. I decided to do a "quick" CRT check and rejuvenation attempt, since I found a correct socket on-hand. I wired it up and hit it with a B&K 470. It was unresponsive - so much so that I thought the 470 wasn't working right, which led to a wild goose chase of checking and rechecking the 470 and the wiring, but all seemed normal. The CRT had virtually no K emission at all, and was even dimmer yet when put back in-circuit, so the process did not help, but definitely did something to it. The CRT was too far gone, or too skimpy on K coating anyway. This is the first CRT I've tried that didn't show at least some improvement.
I'll be saving some of the RF sections and parts for possible re-use, so it's good to have schematics, etc for reference. I've already popped the CRT vacuum and put it in the e-waste box for the next recycling run, and the carcass will be stripped soon. Oh well, good thing it was only ten bucks, so no big loss. I got another rejuvenation data point, and some parts out of the deal.
Ed