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That's a beautiful vacuum(?) pump @15:10. Anyone know more about it?
by jakeogh 9y ago
That's a beautiful vacuum(?) pump @15:10. Anyone know more about it?
- Gibbon1 9y agoI'm unsure, I think it's custom or something vintage (both). No one uses mercury any more as a working fluid in the pump. you use vacuum rated oil instead. And he's definitely using mercury. Also looks like a two stage piston pump. And mostly people use liquid ring vacuum pumps as roughing pumps. https://www.youtube.com/watch?v=21lk8Du85bE https://www.youtube.com/watch?v=21lk8Du85bE Difficulty the roughing pump only gets you to a few microns at best. Good enough for neon work. But tubes require a hard vacuum. Need a diffusion pump (hot oil vapor) or turbo molecular pump (ultra high speed 'fan') after the roughing pump. I don't think he's using a diffusion pump or turbo molecular pump.
- nbernard 9y agoThere is a page on the pumps on the author's website (in french): http://paillard.claude.free.fr/triodes/pompes/pompes.html http://paillard.claude.free.fr/triodes/pompes/pompes.html It seems he made all the specialized equipment he needed to make the tubes.