Audion
Appearance
The Audion was one the first electronic devices able to increase sounds. It was invented by American inventor Lee de Forest in 1906.[1][2][3] It was a glass tube with no air inside. It contained three parts: a filament, a plate, and a grid.
It was the first functional electronic amplifier. It replaced older technologies, such as the coherer used in early radios. It enabled live radio broadcasting for the first time.[4]
References
[change | change source]- ↑ De Forest patented a number of variations of his detector tubes starting in 1906. The patent that most clearly covers the Audion is U.S. Patent 879,532 , Space Telegraphy, filed January 29, 1907, issued February 18, 1908
- ↑ de Forest, Lee (January 1906). "The Audion; A New Receiver for Wireless Telegraphy". Trans. AIEE. 25. American Institute of Electrical and Electronics Engineers: 735–763. doi:10.1109/t-aiee.1906.4764762. Retrieved March 30, 2021. The link is to a reprint of the paper in the Scientific American Supplement, Nos. 1665 and 1666, November 30, 1907 and December 7, 1907, p.348-350 and 354-356.
- ↑ Godfrey, Donald G. (1998). "Audion". Historical Dictionary of American Radio. Greenwood Publishing Group. p. 28. ISBN 9780313296369. Retrieved January 7, 2013.
- ↑ de Forest, Lee (30 Nov 1907). "The Audion - A new receiver for wireless telegraphy". Scientific American. 64 (1665): 348–352. Retrieved 21 October 2023. Non-paywalled reprint of the DeForest presentation at the October 26, 1906 New York meeting of the AIEE. Text version available at the Early Radio History site.
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