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Marconi
Marconi is believed to have sent and recieved the first radio signal. -
Audion Tube
Lee De Forest is known for creating the audion tube, a device that amplifies signals. -
KDKA
Frank Conrad founded the news broadcasting station 8xk that later became known as KDKA.
It was the world's first commercial radio station. -
Commercial Radio
In 1922 WEAF was the first station to aire a 10 minute commercial for an apartment complex. -
Federal Communications Commision
In 1927 The Federal Communications Commision was established.
This organization was responsible for oganizing the licensing of transmitters, and assigning call letters and power limits. -
Call Letters
W is used for anywhere east of the Mississipp River.
K is used for anywhere west of the Mississippi River. -
AM Waves
Amplitude modualtion waves range from 535 khz-1605khz -
Frequency Modulation
Frequenc Modulations range from 88-108 mhz -
Using radio for music
There were very few options to hear recorded music in the 1930's so radio broadcast stations began playing music. -
The Goldn Era
The Golden era was in the middle of the Great Depression when people were desperate for money. -
Family Medium
The radio brought families together by airing music, comedies, and dramas. -
Radio's Demise
Upon the invention of the television radio began to lose popularity.
