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Edwin Howard Armstrong was born
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HE INVENTED THE REGENERATIVE CIRCUIT WHILE HE WAS AN UNDERGRADUATE PATENTED IT IN 1914
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Join the U.S.Army
In late 1917,Armstrong was invited to join the U.S. Army Signal Corps as a captain and was sent to Paris to help set up a wireless communication system for the Army.He returned to the U.S IN THE FALL OF 1919 -
THE SUPERHETERODYNE RECEIVER (PATENTED 1918)
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tHE SUPERREGENERATIVE CIRCUIT PATENTED
Armstrong married Sarnoff's secrtary, Marion MacInnis in December 1922 He gave her the first portable radio as awedding gift -
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Armstrong personal life
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Edwin Armstrong became amillionaire by licensing his patents to RCA.
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While working in the basement laboratory of Columbia's Philosophy Hall, he created wide-band frequency modulation radio (F.M.).
Rather varying the amplitude of a radio wave to create sound ,Armstrong 's method varied the frequency of the wave instead. F.M radio broadcasts delivered a much clearer sound,free of static. -
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Armstrong first large scale field test of his FM radio.
Armstrong conducted the first large scale test of FM radio technology on the 85th floor of RCA 's Empire Stat Building from May 1934 until October 1935.However RCA had its eye on teievision broadcasting ,and chose not to buy the patents for FM -
The frist jazz record on FM radio
Edwin Howard Armstrong,was bron in 1890. In his early yaers most likely in high school study Marconi adventure. Soon ather he learned all about wireless.(Armstrong received a pa6tent on wideband FM on December 26,1933 -
The death .
Financially broken and mentally baeaten ather years of legal tussles with RCA and other , armstrong lashed out at his wife with afireplace poker.Alone and depress over FM patent disputes, Armstrong removed the air conditioner from the window dressed in his coat and hat and jumped to his deth from the thirteenth floor of his New York City apartment January 31,1954.David Sarnoff . His widow Marion renewed the patent figth against RCA and finally prevailed.