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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 Valve and created the triode vacuum tube, which he called the "Audion". It was the first …
A dual-filament three-element spherical Audion from …
https://researchgate.net/figure/A-dual-filament-three-element-spherical-Audion-from-1908-made-by-HW-McCandless-Co_fig1_239398779
Download scientific diagram | A dual-filament three-element spherical Audion from 1908 made by H.W. McCandless & Co. for the De Forest Radio Telephone Company. At the lower left are the two ...
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 ...
RadiolaGuy.com : deForest spherical audion : deForest ...
http://www.radiolaguy.com/Tubes/Deforest_Audion_Tubes.htm
deForest Audion Tubes rare and collector vacuum tubes for sale . HOME. FOR SALE & GALLERY: RADIOLA INFO: WHAT'S NEW: RESOURCES: LINKS: AT AUCTION: INFORMATION: CONTACT: updated 10/11/20: Ordering & Shipping Info > PLEASE READ < BEFORE ORDERING! Type 20, scarce early detector. ...
AUDION_DeForest , Tube AUDION_DeForest; Röhre …
https://www.radiomuseum.org/tubes/tube_audion_deforest.html
Description. Prototypes of the most early three-electrode Audion tubes for Lee de Forest. Edison candelabra base, round bulb. The predecessor was the two-electrode Audion of 1906. Text in other languages (may differ) Tube prices. 9 Tube prices (visible for members only) AUDION_DeForest: eigene Röhre.
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.
Home Page - Antique Wireless Association
https://antiquewireless.org/wp-content/uploads/AWA-Monograph-No-1-Tyne-The-RJ-4-Mystery-1.pdf
de Forest to build a workable audio amplifier. This was in the summer of 1912. In October, de Forest went to New York to try to sell to the Telephone Company the right to use the Audion as a telephone repeater - without notify- ing the F ede ral Telegraph Company with whom he had a contract. After testing the Audion, action of the
DeForest Audion Tube, Type D-01A, circa 1924 - The …
https://www.thehenryford.org/collections-and-research/digital-collections/artifact/256334
Dr. Lee De Forest was an inventor, engineer, and the self-styled "Father of Radio." In 1906, De Forest invented the Audion tube, allowing the detection and amplification of weak radio signals. As the first triode vacuum tube, the Audion revolutionized radio broadcasting--and made it more practical. By the late 1920s, vacuum tube radios were the widespread in people's homes.
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