My friend Danny has a couple of cataracted RCA tubes he's going to give me so I can practice cataract removal. One of the tubes is a Colorama with extremely weak emissions, and the other is a Hi-Lite with a heater to green cathode short. Now, I'd really like to put the Hi-Lite tube in my Winslow, but not unless I can successfully remove the short with my B&K 470 that I'll be getting soon. I've noticed that Hi-Lite tubes are very rare to find. Usually I see that they were replaced with a Colorama after just a few years of use. What do you all think about blasting the short out of that tube? I'd really like to save it.

Heater/Cathode shorts generally weren't "blasted out" with a rejuvenator. You could sometimes use an isolating transformer/booster to float the filament and restore operation, though.

The restorer machines were more useful for grid/cathode shorts.

Whatever I have to do to save this Hi-Lite tube.