Electron (or Vacuum) Tubes - Engineering and …
2017-4-12 · The diode was a very sensitive, “electronic” type of radio wave detector. VTA-5700 Traveling-Wave Tube A more versatile type of electron tube is the triode, or three-element tube, invented by Lee De Forest in 1906 (his brand name for it was the Audion , but it came to be known as the triode).
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