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He was an italian inventor who sent and recieved the first radio signals. He Invented radio basically He sent a signal wirelessly.
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Marconi opened the first radio factory, of Hall Street in Chelmsford, England. He employed around 50 people giving the job opportunities.
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Lee De Forest created the audio tube. A vacum tube that amplified signals. But it also wasnt his idea at first when the invention first began.
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8xk, was later renamed KDKA. The radio station is still around toda\y in Pittsburg, Pennsylvsnia.
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In 1922 WEAF aired a 10 minute commercial or toll broadcast for an apartment complex who charged $50. Radios make money on commercials.
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In California, Joseh Franklin Rutherford transmitted hs first radio Sermon
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first known new program was first broadcasted by 8MK, the unliscenced predecessor of WWJ in Detroit, Michigan
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standard analog television transmissions started in North America and Eruope