Successful Rebuilt of a 15GP22 at ETF

[Username1]

If it were me I would do the heater cooking
TV off, socket removed, power to filament only:
- 7Volts, 1min
- 9V, 1 min
- 10V, 1 min
- 12V, 2min
And then use the super-duper crt rej. machine. Mostly because the other steps in the home fix include biasing the tube on full and then letting it sit for a long time at an unknown current flow through the cathode. This could easily burn off too much of the remaining cathode stuff. If anything on the home grown front, you can cook the heaters, turn on the set with the elevated heaters, and whack the neck of the tube while keeping the higher heater voltage and using high brightness setting. That way you keep the beam current to within the specs that the tube will have to run at when being used normally..........

While you may not think whacking the neck of the tube is a good idea, keep in mind the rebuilding process can kill the tube entirely, as in crack, implosion. Whacking the tube with a screwdriver or some other hard item to shake off some of the carbon buildup ; ) on the cathode is really what the crt rebuilder does. In both the whacking method, and the rejuvinator method, you will see a little spark jump inside the tube, when you achieve this you are done. The rejuvinator most likely does the little spark thing the right way, so you should use the fancy computerized rejuvinator thingie.