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De Forest spherical "Audion" radio tube | National …
https://americanhistory.si.edu/collections/search/object/nmah_1288748
vacuum tube triode maker De Forest Radio Telephone & Telegraph Co. Measurements overall: 3 1/2 in x 2 in; 8.89 cm x 5.08 cm ID Number EM.320353 catalog number 320353 accession number 242268 242268 See more items in Work and Industry: Electricity Data Source
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 …
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...
Making a spherical audion vacuum tube part4 - YouTube
https://www.youtube.com/watch?v=PxxLPrVbb-A
Here we finish up the spherical audion tube.
RadiolaGuy.com : deForest spherical audion : deForest ...
http://www.radiolaguy.com/Tubes/Deforest_Audion_Tubes.htm
a cute little seldom seen tube, functionally similar to the UV-199 2 available Cosmetically perfect but non-functional, for display only) $55.00 each. Click HERE for more Tubes > > Vintage Vacuum Tube Info for Newbie's
Making a spherical audion vacuum tube part 3 - YouTube
https://www.youtube.com/watch?v=2kQhDIrkXNs
We continue the process of making the tube.
Vacuum Tubes/Valves - SparkMuseum
http://www.sparkmuseum.com/TUBES.HTM
The Fleming valve is considered to be the grandfather of all thermionic vacuum tubes. Click here for more information. Deforest Tubular Audion (U.S.) 1916. Click here for more information: Osram R2A (British) 1919: DeForest Spherical …
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.
Hudson filament in the spherical Audion
https://antiqueradios.com/forums/viewtopic.php?t=180263
Post subject: Hudson filament in the spherical Audion. Posted: Dec Fri 02, 2011 5:18 pm . New Member: Joined: Dec Fri 02, 2011 5:10 pm Posts: 3 Location: Bergen/Norway Hi All, This is my first post. I am an electronics hobbyist and a vacuum tube collector. During the day I am a computational biologist currently living and working in Norway.
Stone Vintage Radio Museum - Antique Radios, Wireless ...
https://www.stonevintageradio.com/items.php?CA=1&UID=
Deforest P 200 Two Tube Radio Amplifier. 1919: Deforest RJ4 Spherical Audion Radio: Deforest RJ4 Spherical Audion Radio from 1914: Deforest RJ4 Spherical Audion Tube Radio Repro WORKS: Deforest RJ4 Spherical Audion Tube Radio Repro WORKS: DT-3 Vacuum Tube Detector for BC-14A & Other Radios
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