Lee de Forest on His Contribution to Radio
Known as the father of the radio, Lee de Forest describes his 1906 invention of the thermionic valve and its place in the development of the radio.
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Lee de Forest on His Contribution to Radio
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Known as the father of the radio, Lee de Forest describes his 1906 invention of the thermionic valve and its place in the development of the radio.
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In a speech recorded on an Edison Gold Moulded cylinder for the opening of the New York Electric Show on October 3, 1908, Thomas Edison reflects on the technological advances of the era.
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On April 9, 1860, 17 years before Thomas Edison invented the phonograph, Parisian inventor Edouard-Leon Scott de Martinville made a recording on a “phonautograph,” which worked by tracing sound waves onto paper blackened by smoke. Unplayable for more than a century, the recording was recently brought to life by new audio technology. On the recording, Scott is heard singing a snippet from the French folksong "Au Clair de la Lune."
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On April 15, 1935, in the Long Lines Building at 32 Sixth Avenue in New York City, W.S. Gifford and T.G. Miller of the American Telephone and Telegraph Company take part in a historic phone call. While they are speaking on the phone from offices just 50 feet apart, the call is transmitted over a telephone circuit that stretches approximately 23,000 miles around the world.
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