This day, June 17th, in 1936 electrical engineer Edwin H. Armstrong demonstrated a revolution in radio broadcasting - FM!
This day, June 17th, in 1936 electrical engineer Edwin H. Armstrong demonstrated a revolution in radio broadcasting - FM! "Up until the late 1930s, AM (amplitude modulation) radio frequencies were the only ones available for those listening in. The broadcasts were typically full of static and created a problem for engineers to eliminate. While there were many ideas to get rid of the problem, they were met with little success until Armstrong began researching a solution. Through trial and error, he eventually was able to modify the frequency of audio signals and created a 'wide-band' FM (frequency modulation) system. At a conference of radio experts, Armstrong played a jazz phonograph record first at an AM frequency and then switched to FM. An article capturing this event from the San Bernadino Sun stated: '...if the audience of 500 engineers had shut their eyes, they would have believed the jazz band was in the same room.' It was later described as the most importa...