2 ms·

link please.

• babypuncher 5y ago
  This video is mostly about a diffusion pump, but he uses it to pull a vacuum in a homemade CRT made out of an Erlenmeyer flask and the filament from an incandescent light bulb. https://www.youtube.com/watch?v=SrNVLCHrJtY https://www.youtube.com/watch?v=SrNVLCHrJtY