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Marconi was an italian inventor. He sent and recieved the first radio signal in 1895. It wasnt real radio, it was a radio signal. Some say he was not the first, maybe it was good public relations.
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Frequency Modulation. 88 to 108MHz. 1000KHz=1MHz
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Lee De Forest created(or borrowed the idea for) the audion tube. It is a vacuum tube that amplified signals. Believed that a canadian inventor, Reginald Fessenden, acyually came up with the idea, but he didnt make it to the history books.
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Is an Amplitude Modulation. 535 KHz-1605KHz. Modulation means change.
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First radio station aired in 1920. Named 8XK, later renamed KDKA. Aired by Frank Conrad. Still around today broadcasting out of Pittsburgh, Pennsylvania.
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It's the reason why radio stations make their money. In 1922, WEAF aired a 10 minute 'commercial' . It was a toll broadcast, for an apartment complex charging $50.
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Call Letters identify the radio stations. W is east of the Mississippi River. K is West of the Mississippi River.
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The independent radio stations were too popular. Organize the licensing of transmitters. Assigning radio station frequencies, call letters, and power limits.
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Happened in the 1930s and 1940s. Everyone listened to radio. Radio provided an escape during hard times.
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The entire family enjoyed radio together. Big band music and story hour. situational comedies and dramas.
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It was hard to renact the characters from radio to tv. The appearance wouldnt match the description of the radio characters. The broadcaster may sound like the character but not look like them.
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Tv makes appearance in the late 1930s. and ruins all chances of radio getting high in the ratings chart. then music ends up saving radio.
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music on the radio filled the void. you could listen to music without all the work of having to go to the store and by the record. and you could listen to the radio in the cars.
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Radio is no modernized and can be looked up on the internet. You can downloald and listen to anywhere. Music is sometimes illeagalt downloaded
