Image:Triode tube 1906.jpg

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Location

37.618615° N, -122.386993° E

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Description

Lee de Forest's triode tube (Audion) from 1906. 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[1] in SFO Airport, Terminal 3 from 2006-09 to 2007-05.
Date

2006:11:12 21:47:31 GMT
Author

Gregory Maxwell
Permission

GFDL-1.2
I, the author of this work, hereby publish it under the following license:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 only as published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "Text of the GNU Free Documentation License."

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