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The canadian Reginald Aubrey Fessenden performs the first radio transmission with with human voice
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Edwin Howard Armstrong invents the regenerative circuit that increases the quality of emissions
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Edwin Armstrong describes frequency modulation (FM) for the first time. by not initially using his invention he committed suicide
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In this decade, the first frequency modulated station to broadcast regularly, WSM,FM from Nashville, Tenesse, begins to operate
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The first medium wave transistor that is carried in the hand is invented
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English company trevor baylis patents the first clock radio in history