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Guglielmo Marconi was a Italiain Inventor who sent and recieved the first radio signal
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In 1906, Lee De Forest made a device called the Audio Tube. Which was bassically a vacuum tube that strengthened signals. Some believe the idea was thought of by a Canadian inventor named Reginald Fessenden
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Some of the first radio was named 8XK made by Frank Conrad, but soon the name was changed to KDKA
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W is East of the Mississippi River, K is West of the Mississippi River
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Around the time, FRC began to realize that 'Uncle Charles' was getting too popular. So they organized a license for transmitters
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As TV made it's apperence commericals began popping up
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Mr. Edwin Armstron created the FM transmitter which made sounds and signals more powerful
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Between the 30's and 40's (Durning the Great Depression) radio prodcasts brought familys together to listen to the muscials and story hours.
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Some famous shows were GunsNSmoke, The Shadow, Dick Tracey, Little Orphan Annie, etc
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AM waves had amplitude modulation, 535 KHz- 1605 KHz
While FM waves had frenquent modulation at 88-108 MHz
