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NIHF Inductee Lee de Forest Invented the Audio Amplifier
https://www.invent.org/inductees/lee-de-forest
NIHF Inductee Lee de Forest Invented the Audio Amplifier Back to Inductee Search Lee de Forest Audion Amplifier US Patent No. 879,532 Inducted in 1977 Born August 26, 1873 - Died June 30, 1961 In the early 1900s, the great requirement for further development of radio was an efficient and delicate detector of electromagnetic radiation.
Lee De Forest: Father of Radio and Inventor of the Audion ...
https://blog.minicircuits.com/lee-de-forest-father-of-radio-and-inventor-of-the-audion/
De Forest’s Audion consisted of a glass vacuum tube containing three electrodes inside: a cathode (filament), an anode (plate), and a control grid (zigzagging wire).
The ‘Audion Piano’ and Audio Oscillator. Lee De Forest ...
https://120years.net/wordpress/the-audion-pianolee-de-forestusa1915/
Lee De Forest. USA, 1915 – 120 Years of Electronic Music. The ‘Audion Piano’ and Audio Oscillator. Lee De Forest. USA, 1915. “Audion Bulbs as Producers of Pure Musical Tones” from ‘The Electrical Experimenter’ December 1915. Lee De Forest , The self styled “Father Of Radio” (the title of his 1950 autobiography) inventor and holder of over 300 patents, invented the triode …
Lee DE Forest.org
https://www.leedeforest.org/The_Audion.html
Lee de Forest invented the three-element vacuum tube which became the basis of all electronic devices. He called it the Audion. In the Nineteenth Century Thomas Edison noticed a blackening on the inside of his burning light bulb. He believed it to be caused by electrons and he named it the “Edison Effect.”
Lee de Forest.org
https://www.leedeforest.org/Home.html
He was an early if not the first broadcaster of entertainment-based audio, primarily opera music. Between 1920 to 1930 he invented, patented and improved upon a system of recording a sound track on a strip of film, thus allowing accurate synchronization with the picture. Lee de Forest invented the Talking Motion Picture. Decades of de Forest
Lee de Forest | American inventor | Britannica
https://www.britannica.com/biography/Lee-de-Forest
Lee de Forest, (born August 26, 1873, Council Bluffs, Iowa, U.S.—died June 30, 1961, Hollywood, California), American inventor of the Audion vacuum tube, which made possible live radio broadcasting and became the key component of all radio, telephone, radar, television, and computer systems before the invention of the transistor in 1947. Although de Forest was bitter …
Lee de Forest and his first 4-stage audio amplifier, 1913 ...
https://calisphere.org/item/fb7c521f2479a2592a17174568c89f19/
Description Lee de Forest and first 4-stage audio amplifier, Radio Telephone & Telegraph Company's Laboratory and Factory, Bronx, New York, 1913. This Audion exhibit was used to prove the value of the Audion for his 1913 federal trial for stock fraud. (He was acquitted, but several business partners were convicted.) Type image Identifier
Audion - Wikipedia
https://en.wikipedia.org/wiki/Audion
The Audion was an electronic detecting or amplifying vacuum tube invented by American electrical engineer Lee de Forest in 1906. It was the first triode, consisting of an evacuated glass tube containing three electrodes: a heated filament, a grid, and a plate. It is important in the history of technology because it was the first widely used electronic device which could …
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