[zenithfan1]

Sometimes a weak or slow tube will take a while to "look right". At times they can look washed out or out of focus after a long period of sitting. I have a few slow ones that test great but look like a bad tube after sitting a few months. 15 min of run time makes 'em snap back to normal. Does it focus better if you turn the brightness down? If so, it's one of these causes. I also have some weak ones that do the same thing. I think it's just how a B/W tube shows it's age.

Neat set by the way, I rarely if ever see those anymore. I'd say it's been a good ten years since one has crossed my path. I'm glad you got it working.