[sdiy] OT: Today's toxic mess

[danial stocks]

  Here is an
>interesting design question:  How do you make bearings that have are not
>oiled or greased, but will support the tungsten disk which spins at very
>high speeds in a total vacuum, at high temperatures,  inside a glass
>envelope where you can't get at it to replace it if it goes bad, and work
>reliably for years?
>

I dot know, and maybe neither do they.. I think thats why this tube was 
replaced.. the electrodes/ filament etc seems ok, but the bearings  rattle..
Cheers,
Dan
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