A Home-Made Triode!??!

[Don Symes]

http://home.earthlink.net/~lenyr/hm-triode.htm (via hackaday.com)

This master tinker home-brewed a functional vacuum triode. Wow.

[clyde]

Do It Yourself

Diy Amps, Diy Pickups, Diy Stompboxes, Now Diy Vacuum Tubes. It's Amazing What A Person Can And Will Do With A Little Bit Of Knowledge.

[Arthur B.]

http://home.earthlink.net/~lenyr/hm-triode.htm (via hackaday.com)

This master tinker home-brewed a functional vacuum triode. Wow.

That's clearly not a vacuum tube as it's clearly exposed to the open air. However, H.P Friedrichs has made some.

[TD_Madden]

think the article mentioned using a glass salt-shaker as the bulb......just not enough pictures, I'd guess.

[Steve Conner]

I think it goes without saying that he operated it in a bell jar connected to a vacuum pump.

[dai h.]

this guy apparently made some also:

http://www.pandcamp.com/tubeamp.htm

[Arthur B.]

this guy apparently made some also:

http://www.pandcamp.com/tubeamp.htm

I may be able to read japanese, but it doesn't look like he made any of those tubes.