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Tesla
Transmission of radio frequency energy is exhibited in experiments by Nikola Tesla. -
Marconi
Marconi builds a wireless system capable of transmitting long distance signals. -
Fleming Valve
Fleming invents the vacuum tube diode that helps create the three-element vacuum tube called Audion. -
Radio Audiocast
Fessenden uses an alternator and rotary spark plug transmitter to make the first radio audio broadcast. -
First Radio Stations
Several radio stations appear and claim to be the first public radio stations. -
Radio Act
The Radio Act of 1927 re-assigns stations to clear frequencies and makes radio stations operate in the public's interest. -
FM Radio
Edwin Armstrong invents FM radio, which provides static-free broadcasting. -
Fireside Chats
People turn to the radio for entertainment and comfort during the Great Depression. -
Invasion From Mars
CBS broadcasts various horror stories which cause panic among the audience who thought they were real. -
Transistor Radio
The pocket transistor radio is introduced. -
Radio Suffers
Television is a big novelty and the radio looses popularity and focuses on playing records. -
Telstar
The first radio communication satellite, Telstar, is launched into space. -
Transatlantic
Marconi successfully conducts the first transatlantic radio communication. -
RDS Protocol
RDS allows stations to include artists and song info on digital radio displays. -
The Digital Age
Amateur experimenters begin to use computers with audio cards to process radio signals and broadcast the first digital transmission. -
Internet
The first Internet radio station appears. -
Podcasting
Podcasting appears with broadcast on iPods and becomes successful. -
Streaming Popularity
Nearly 13% of Americans listen to radio online.
