day-of-the-radio, may 7th

May 7’th is the Day-of-the-Radio for Russia as this day on year 1895 Alexander Popov demonstrated his coherer based radio receiver to the Russian Physical and Chemical Society.

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Alexander Popov is first invented, Guglielmo Marconi first patented. This two great persons works independently with Oliver Joseph Lodge coherer, which was modified Edouard Branly “tube” and successfully enhanced it to make automatic radio signal receiving possible.

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