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Guglielmo Marconi
Marconi sent and received first radio signal in 1985. It's not for sure that he came up with the idea. Then if you went around saying you did it then people believed you. -
Reginald Fessenden
People thought Lee De Forest stole the idea from this man. Fessenden was a canadian inventor who people believed he came up with the idea for audion tube. This was common to have ideas stolen from you. -
Audion Tube
Lee De Forest is credited with the invention. The audion tube is a space where it amplifys signals. Others think Lee stole the idea. -
Frank Conrad
Invented 8XK, or KDKA in 1920. Was an American electrical engineer. Built his own transmitter in Swissvale, Pa. -
First radio Station
In 1920, 8XK was the first Radio Station. it was later renamed KDKA. Played music with microphone next to record player. -
WEAF
In 1922 Weaf aired a 10 minute commercial. The commercial was about an apartment complex charging 50$. That the first commercial aired on radio. -
Major Edwin Armstrong
Thanks to Edwin Armstrong FM was music. AM was talk-shows, and comedys. Armstromg demonstrated in 1924 advantages of FM radio. -
FRC
Established FRC (Federal Radio Communication) in 1927. It was used to stop Uncle Charlies. Uncle Charlies were single radio stations for just ordinary people. -
Period: to
Golden era
Golden era was when radio was everything. Peoples washing machine would break but they would save up for a radio instead. For some this time was during the great depression and radio was a way to escape. -
Music on the radio
For people during the Great Depression radio helped them cope with the situations. It filled a void for them. It was their everything. -
AM waves
Am stands for Amplitude Modulation. Lower frequency than Fm waves. -
FM waves
Fm stands for Frequency modulation. Higher frequency than Fm waves. -
radio vs. new technology
Newer technologies have decreased radio traffic. Apps such as pandora, spotify, youtube, and Itunes. The whole community of radio hasn't died yet. -
Money making for radio
Radio stations charge for commercials that's how they make money. Todays cost for commercials is a couple grand for 30 seconds of air time. Commercials are main ways radio broadcasters make their money. -
KDKA
KDKA still operates as a radio station. It operates in Pittsburg, Pennslyvania. Has it's own tv station
