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De Forest spherical "Audion" radio tube | National …
https://americanhistory.si.edu/collections/search/object/nmah_1288748
De Forest spherical "Audion" radio tube De Forest spherical "Audion" radio tube. Previous. Next >> Usage conditions apply. Downloads. Metadata. International Media Interoperability Framework. IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to ...
DeForest Spherical Audion - uv201.com
http://uv201.com/Tube_Pages/deforest_audion.htm
DeForest Spherical Audion DeForest Single Wing Audion c.1912 Tantalum Filaments In 1906, Lee DeForest added the grid element to the Fleming Valveand created the triode vacuum tube, which he called the "Audion". It was the first purely electronic component
Value Of Spherical 'Audion' Tube? And what is it?
https://antiqueradios.com/forums/viewtopic.php?p=1924224
"Spherical audion" is a "common name" commonly understood to be an early deForest type with a spherical bulb, candelabra base, and some free wire connections. The term is also applied to some scarce, similar tubes made by Marconi, Western Electric, and a few others.
Making a spherical audion vacuum tube part1 - YouTube
https://www.youtube.com/watch?v=oSgVGwqJ2Jk
The start of the radio revolution came with Lee de Forest inventing the triode vacuum tube. One of his first tubes and the most famous is the spherical audio...
DeForest Spherical Audion - "Double Wing" - High Quality ...
https://www.radiodaze.com/deforest-spherical-audion-double-wing-high-quality-reproduction-item-rdw-112/
A high quality reproduction of a DeForest "Double Wing" spherical audion. Reproduction was made by Phil Weingarten (see brief biography). This was fabricated to be functional and filament continuity tests good - however untested otherwise. See photos.
RadiolaGuy.com : deForest spherical audion : deForest ...
https://www.radiolaguy.com/Tubes/Rare,%20collector%20tubes.htm
The tube data sheet is my reproduction. $125.00. DV5 (Isolantite Ceramic "UV" Base) same as DL5 but with "UV" base (short pins) 2 - available in good cosmetic condition for display (have good filament but test very weak) $40.00 each. size Compare. DV3-A, small UV base (like a UV-199), Isolantite Ceramic Base.
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