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The first radio signal was made be an Ialian inventor. He send and received first radio signal in 1895. He was using the idea based on the Hertzian waves.
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In 1906, Lee De Forest created the Audion Tube. A audion tube was a vacuum tube that amplified signals. It is said that a Canadian investor, Reginald Fessenden, actually came up with the idea.
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AM= Amplitude Modulation. Modulation means change.
535KHz-1605KHz -
Frequency Modulation
88-108Mhz -
the first radio station to play tv on the radio. Still in Pittsburg, Penn. Founder Frank Conrad
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WEAF toll broadcast for an apartment complex charging$50.
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Uncle charlie was used for personal radio stations
- was too popular
-organized the liscensing of transmitters
-assigning radio stations frequenices,call letters, power limits. -
The Golden Era was during 30s-40s. In the middle of the Great Depression it (radio) provided an escape.
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Family Medium are shows were the entire family can enjoy. Show like Gun Smoke, Superman, and Amos n Andy.
- Dramas, story hour, big band music and Sit Com. -
Major Edwin Armstrong invented the FM transmitter
better sound and stronger signals. which made people upgrade to the better verison.
