[old_tv_nut]

As you may recall, I complained that the dynamic convergence controls didn't seem to have enough range. When I took a closer look at the neck hardware, I realized that you can't see the internal pole pieces in the rebuilt 21FBP22 tube. So, I took out the souvenir bad gun from the 21AXP22A rebuild attempt, and used it as a guide. The parts that are visible in the 21 FB are not quite identical, but I hoped it would be close enough. When I moved the convergence coils back to match the old gun, voila! The red and green now can be converged.

Blue horizontal is still a problem, but it now seems that there is a mechanical problem with the blue amplitude control. It's very hard to see this coil, since it's mounted on a second flange some distance behind the main control panel, but trying to align a flashlight and my eyeball, I can't see a brass screw like the other coils; and. I have not been able to find a slot by poking around with a screwdriver. Now I guess I'll have to pull the chassis to check it out. I can hope that the core will be laying inside the set, but it most likely is broken or missing.