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- transcontinental telephone service. In 1906, the eccentric American inventor Lee De Forest developed a triode in a vacuum tube. It was a device that could amplify...25 KB (2,940 words) - 03:21, 5 April 2024
- Electronics/Print Version (section Vacuum Tube Basics)The first vacuum tube diodes were created by Thomas Edison in 1904. These initial tubes could only be used for rectification. The triode, which allowed...13 bytes (84,563 words) - 13:49, 21 October 2023