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Guglielmo Marconi he was Italian inventor who proves the capability of radio communication. He was the first person to sent and receive the first radio signal ever.
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Lee Deforest invented the AM radio.
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Detects the high frequencies of radio waves.
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Reginald Fessenden was an egineer and inventor who worked on voice radio. In 1907 he invented a radio tude called Audion.
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uses one or more local oscillators and mixers to obtain a constant frequency signal made by Edwin Armstrong
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This began in 1920 with the historic broadcast of KDKA.
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It was by KDKA and did it on this date because it was an election date for the results of the Harding-Cox presidential race. It got very popular because the people that listened to it knew about it before they read it in the newspaper.
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It was for a real estate developer and it was aired in New York.
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The first national network was called NBC. It stands for National Broadcasting Company and was made or formed by RCA. It stands for Radio Corporation of America.
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The aired the Rose Bowl football game from Pasadena and with the burgeoning industry made the airwaves so backed uo that the Federal Radio Commission was formed to assign frequencies to everyone that broadcasted.
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It was available and up and running.
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It was invented by William Shockley, Walter Brattain, John Bardeen, and and physiticists that has worked with quantum theory. The transistor was an amplfying circuit that worked using the element germanium.
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Wanda Ramey was the first woman to be on the radio broadcasting. It was her first job. She was interviewing celebrities.
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Shockley improved the original idea of the Point-contract Transistor. He improved it by making it cheap, sturdy, use little power, work instantly, and was small. It was frst available in hearing aids and soon after by transistor radios.
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This opened an ideological door for pay TV in the 1990's. Maikng this a step closer to a la carte.
