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Edwin Howard Armstrong (December 18, 1890 [2] – February 1, 1954 [3]) was an American electrical engineer and inventor who developed FM (frequency modulation) radio and the superheterodyne receiver system.
First on the Moon: A Voyage with Neil Armstrong, Michael Collins and Edwin E. Aldrin, Jr. (ISBN 0316051608) is a 1970 book by the crew of the Apollo 11 Moon landing (Neil Armstrong, Michael Collins, Buzz Aldrin) in collaboration with Gene Farmer and Dora Jane Hamblin. Epilogue by Arthur C. Clarke in the first edition.
The film focused primarily [5] on the three pioneers [6] of radio in America: Lee de Forest, Edwin Howard Armstrong, and David Sarnoff. [7] The program interspersed audio and musical highlights of "old time" radio with the stories, achievements, failures, scams and bitter feuds between each of the main protagonists. [8]
1915 Armstrong regenerative receiver. The inventor of FM radio, Edwin Armstrong, filed US patent 1113149 in 1913 about regenerative circuit while he was a junior in college. [31] He patented the superregenerative circuit in 1922, and the superheterodyne receiver in 1918.
By 1933, Edwin Armstrong had filed key patents for techniques he developed that were to eventually make FM radio successful. His professional relationship with Marion's former boss, Sarnoff, fractured when Sarnoff who was by then the President of RCA, concluded the development of FM radio was not in the best interests of RCA, which operated an ...
In 1933, FM radio was patented by inventor Edwin H. Armstrong. [74] FM uses frequency modulation of the radio wave to reduce static and interference from electrical equipment and the atmosphere. In 1937, W1XOJ , the first experimental FM radio station after Armstrong's W2XMN in Alpine, New Jersey, was granted a construction permit by the US ...
ISBN 0-8129-0672-1 (cloth) – A thoughtful biography by an early associate of Sarnoff's. Lewis, Tom. (1991). Empire of the Air: The Men Who Made Radio. New York: HarperCollins ISBN 978-0-06-018215-1 (cloth) ISBN 978-0-06-098119-8 – Profiles Sarnoff's life along with those of Edwin Armstrong and Lee De Forest, drawing on archival sources.
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