Arkivo originala(1 835 × 1 258 pixel-i, grandeso dil arkivo: 194 KB, MIME type: image/jpeg)

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Pozicio de la fotilo37° 37′ 07,01″ No, 122° 23′ 13,17″ Ok Kartographer map based on OpenStreetMap.Tiu cxi bildo kaj pliaj sur OpenStreetMapinfo
Deskripto
English: An early De Forest audion tube, the first electron tube that could amplify. The first triode, or tube with three electrodes, a filament, grid, and plate, the audion was invented in 1906 by American engineer Lee De Forest. The top metal electrode is the plate. The zigzag 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. As many Audions did, this model had two filaments (indicated by the four filament supply wires) so that when one burned out the "spare" could be used. The filament wires were attached to the screw terminal at left, while the grid and plate terminals were brought out through the right end of the glass envelope to the two wires at right. Tube belongs to History of San Jose, Perham Collection of Early Electronics.
Dato GMT
Fonto 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.
Autoro Gregory F. Maxwell <gmaxwell@gmail.com> PGP:0xB0413BFA
Yurizo
(Riuzo di ica arkivo)
GFDL-1.2
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GNU head Estas permesite kopii, disdoni kaj/aŭ redakti ĉi tiun dokumenton, sen senŝanĝaj sekcioj, sen antaŭkovrilaj kaj sen dorskovrilaj tekstoj, laŭ la kondiĉoj de la Permesilo GNU por Liberaj Dokumentoj, nur Versio 1.2 eldonita de la Free Software Foundation; sen Senŝanĝaj Sekcioj, Antaŭovrilaj Tekstoj aŭ Malantaŭkovrilaj Tekstoj. Kopio de la permesilo estas inkluzivita en la sekcio titolita GNU Free Documentation License. solo 1.2

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12 nov. 2006

37°37'7.014"N, 122°23'13.175"W

Historio dil arkivo

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Dato/HoroMiniaturoDimensioniUzeroKomento
aktuala22:53, 20 dec. 2006Imajeto di versiono ye 22:53, 20 dec. 20061 835 × 1 258 (194 KB)Yves-LaurentRétablissement de la version précédente
22:50, 20 dec. 2006Imajeto di versiono ye 22:50, 20 dec. 20061 835 × 1 258 (194 KB)Yves-Laurent== Summary == {{Information |Description= Lee de Forest's triode tube (Audion) from 1906. Courtesy of History of San Jose, Perham Collection of Early Electronics. |Source= en:Triode_tube_1906.jpg : Photo by original uploader, taken at The History of
03:46, 13 nov. 2006Imajeto di versiono ye 03:46, 13 nov. 20061 835 × 1 258 (194 KB)Gmaxwell{{Location dec|37.618615|-122.386993|scale:1000}} {{Information |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 Audi

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