I saw a few tidbits online from a google search, but no service manual. 
Might be very hard to get spare parts, etc.

I was planning to experiment with a vacuum pump from Harbor Freight Tools 
later this year; people have claimed it can pull down to 25 microns (yeah, 
right.....) but it's definitely good enough to get a glow discharge. I plan 
to see if I can get anything interesting with helium and/or argon inside a 
glass beer-bottle.

Sounds a bit silly, but it shouldn't be too difficult to get a decent  seal 
on it, then bake-out the impurities in a modified toaster-oven. No need for 
dangerous bombarding. Helium is very easy to get, and seems to have enough 
spectral emission in the visible region.

Where am I going with this ? Just suppose it's possible to make a large 
nixie-like tube the size of a beer-bottle. Think CD47 (saw *one* on Ebay 
yesterday for $1300; apparently the seller gave up trying to find enough of 
these to build a clock. Gone now.).






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