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the first radio signal was received in 1895 . It was received by an Italian inventor named Marconi .He also sent the first radio signal . The first radio signals were attempted to be sent across the Atlantic Ocean .
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Amplitude modulation / Am . 535 KHz - 1605 Khz .
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In 1906 , Lee Dee Forest created the Audion tube . Its believed that a Canadian inventor named Reginald Fesseden came up with the idea . Fesseden never made the product though.
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W is east of the Mississippi river . K is west of the Mississippi river . Most television shows and radio stations are given a call letter. The letters " N " and " A " were given to military stations . The United States were given the letter's " K " , " W " , " N" , 'A"
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If the titanic didn't have a radio they wouldn't have been able to inform the people on land that they were sinking and far more lives would have been lost . The sailor was able to inform people that they were sinking so they were able to go over there and save anybody they could .
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first station was named 8xk later named KDKA .Still exists today in Pittsburgh , Pennsylvania .
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In 1922 WEAF aired a 10 minute commercial or toll broadcast for an Apartment complex charging 50$ . Radio station's make most of their money for commercials as well as television shows .
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The station Uncle Charlie became too popular so they established the FRC . The FRC organizes the licensing of the transmitters . Assigning radio signals call letters and power limits .
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The 30's and 40's . Middle of The Great Depression . People wanted entertainment .
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Frequently Modulation . 88-108 MHz .
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TV makes appearance in the late 30's . As popularity grew advertisers went to television . Radio stations lost money and jumped ship .
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At this time you had very few options to listen to . For example jukeboxes , records , live concerts . Music on the radio filled a void .
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Major Edwin Armstrong invented the Fm transmitter , which made for stronger signal and higher quality sound .Talk on Am . Music on Fm.
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Big band music / story hour / situational comedies / dramas . The Family Medium was a radio broadcast that was aired for the whole family .
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radio does need WiFi or cellular data but it does require a cellular tower . Music apps now for insistence Pandora can stream far more music and stations than the radio can . Also the radio choses the music but the apps now allow the user to choose the music they listen too