[youtube http://www.youtube.com/watch?v=8_eLO0exato&hl=en&fs=1&rel=0&fmt=18]

One of our most viewed and discussed postings of ’08 was Claude Paillard’s stunning triode video where he makes a vacuum tube triode from scratch. While poking around the Web, looking for other videos he might have done, I bumped into this documentary about the 2006 European Triode Festival in the Netherlands, celebrating the 100th anniversary of this game-changing electronic component. To celebrate, a copy of the DeForest Audion (the first triode) was replicated. This video documents the build.

More:
Revisiting Claude Paillard’s triodes
Make your own vacuum tubes?