24 Mar

File:Triode tube 1906.jpg

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Revision as of 04:41, 24 March 2013
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{{Location dec|37.618615|-122.386993|scale:1000}}

{{Location dec|37.618615|-122.386993|scale:1000}}

{{Information

{{Information
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|Description=Lee de Forest's triode tube (Audion) from 1906. The top metal electrode is the plate. The bent metal wire partly visible under it is the grid. The filament was originally under that, attached to the wires at left, but has burned out. Courtesy of History of San Jose, Perham Collection of Early Electronics.
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|Description={{en|A De Forest [[:en:Audion|audion]] tube, the first [[:en:vacuum tube|electron tube]] that could [[:en:amplification|amplify]]. The first [[:en:triode|triode]], or tube with three electrodes, a [[:en:electrical filament|filament]], [[:en:grid (electricity)|grid]], and [[:en:plate electrode|plate]], the audion was invented in 1906 by American engineer [[:en:Lee De Forest|Lee De Forest]]. The top metal electrode is the plate. The bent metal wire partly visible under it is the grid. The filament was originally under that, attached to the wires at left, but has burned out. The filament wires were attached to the screw terminal at left, while the grid and plate terminals were brought out to the two wires at right. Courtesy of History of San Jose, Perham Collection of Early Electronics.}}

|Source=Photo by uploader, taken at ''The History of Audio: The Engineering of Sound'', an exhibition of the San Francisco Airport Museums[http://www.sfoarts.org/] in SFO Airport, Terminal 3 from 2006-09 to 2007-05.

|Source=Photo by uploader, taken at ''The History of Audio: The Engineering of Sound'', an exhibition of the San Francisco Airport Museums[http://www.sfoarts.org/] in SFO Airport, Terminal 3 from 2006-09 to 2007-05.

|Date=2006:11:12 21:47:31 GMT

|Date=2006:11:12 21:47:31 GMT

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