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History of radio - Wikipedia
A homemade Audion radio receiver constructed by an amateur radio hobbyist 1914. The Audion (triode), the first amplifying vacuum tube, was invented by Lee De Forest in 1907 but was not widely
National Association for Music Education - In 1907 the 1st radio broadcast of a musical composition aired. Celebrate #MIOSM by listening to the radio. #NCGME #MusicTheSoundOfMyHeart nafme.org/MIOSM | Facebook
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The Development of Radio | American Experience | Official Site | PBS
Lee DE Forest.org
Au Maroc, Casablanca fut la première ville a utilisé un système radio à base de fréquence radioélectrique en 1907 | LTE Magazine
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