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De Forest Audion Tube, circa 1908 - The Henry Ford

    https://www.thehenryford.org/collections-and-research/digital-collections/artifact/170965/
    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. Artifact Vacuum Tube Date Made circa 1908 Creators

DeForest Audion Tube, Type D-01A, circa 1924 - The …

    https://www.thehenryford.org/collections-and-research/digital-collections/artifact/256334
    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. Artifact Vacuum tube Date Made circa 1924 Creators

De Forest Audion - Engineering and Technology History Wiki

    https://ethw.org/De_Forest_Audion
    On 25 October 1906 Lee de Forest submitted a patent application on a "Device for amplifying feeble electrical currents", which included the first form of the 3-electrode Audion. The device and its later improvements became the standard, allowing for inexpensive amplification of wireless voice signals among other amplification uses.

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/
    Of his 300 patents, De Forest’s Audion was the most notable and proved enough to mark him as one of history’s fathers of the radio. This device opened the door for remote entertainment and the transmission of speech and music over long distance, allowing a whole new method of convenient communication. Sources

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