Powering up a 3FP7 Radar CRT Tube

From my collection of old scope tubes that have somehow ended up in my possession, this one is probably the most unique. This is a small 3 inch CRT with the elusive P7 phosphor, which has a bright blue short-duration emission, and long-duration yellow-green emission. As such, it was used in radar PPI indicators, although I can't find any information about what sort of equipment the tube type that I have would have come from, only that there was a sudden surplus of these tubes after WWII.
I had never powered up this tube before today. To see if it worked, I replaced the CRT in an old color TV test equipment thing with this tube. It has the proper 6.3V supply for the filament, and some potentimeters to set the focus and brightness, but the anode #2 voltage is only ~750V, far lower than the 2-4KV that the 3FP7 is supposed to operate at according to the datasheet (frank.pocnet.n.... But it's the highest voltage power supply I have on hand, and seemed to get an electron beam out of this tube.
This tube has electrostatic deflection plates like a normal scope tube, but I didn't have anything to hook up to them. However, a small magnet can be used to direct the electron beam instead.

[@jellyfishappliance7182]

Nice tube. I love P7 Phosphor. Look after it !

[@martinlintzgy1361]

years ago, I made a home made scope (all valve) using one of these tubes.

[@itepk0522]

Amazing, I've never seen one! It would be cool to attach it to some driver.

[@furkanyldz8460]

After 3 years ago a new video I can't believe this

[@itepk0522]

Me too