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History of Radio
KF9UL's Tribute to Edwin Howard Armstrong
Born
December 18, 1890Died
February 1, 1954The inventions of engineer Edwin Howard Armstrong were so important that to this day every radio or television set makes use of one or more of his developments.
Born in New York City, Armstrong earned a degree in electrical engineering from Columbia University in 1913. While in college, he invented the regenerative circuit, which was the first amplifying receiver and the first reliable continuous-wave transmitter.
In 1918, he invented the superheterodyne circuit, a highly selective means of receiving, converting, and greatly amplifying very weak, high-frequency electromagnetic waves. His crowning achievement (1933) was the invention of wide-band frequency modulation, now known as FM radio.
Picture & Bio Courtesy of
National Inventors Hall of Fame
Empire of the Air: The Men Who Made Radio
You can find out more about Edwin Howard Armstrong, Lee De Forest, David Sarnoff, Reginald Fesenden from the book by Tom Lewis or the great 2 hour video by Ken Burns.
Book from Amazon.com
Empire of the Air (Video)
by Ken Burnsfrom Amazon.com from VideoFlicks.com History of Radio HeathKit
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