Edwin H. Armstrong born on this date in 1890. His inventions include the regenerative circuit, superheterodyne and FM. Ham radio call: GS (yes, that’s what he assigned himself on SPARK)


“Anyone who has had actual contact with the making of the inventions that built the radio art, knows that these inventions have been the product of experiment and work based on physical reasoning, rather than on the mathematicians' calculations and formulae. Precisely the opposite impression is obtained from many of our present day text books and publications”- Major Edwin Howard Armstrong.