-
Heinrich Hertz proves that you can send and receive electronic waves wireless.
-
Nikola Tesla develops the Tesla Coil which can transmit electricity wirelessly. This laid dow the basics for modern radio towers.
-
Guglielmo Marconi send the first transatlantic radio signal from the U.S. to the U.K.
-
The Audio Tube is developed as the first amplifier to push waves further by providing more power to the signal.
-
The radio station WEAF broadcasts the first commercial on air in 1922.
-
With the rise of radio broadcasting, the Federal Radio Commission (known as the Federal Communications Commission today) created call letters, power limits, and licensing laws.
-
The FRC further regulates radio broadcasting by assigning letter for stations East and West of the Mississippi.
-
Withe the Great Depression and War negatively affecting Americans, radio became an escape for them as they would listen to the radio with their family as a pastime. The diversity of radio also flourished with music, comedic, and dramas growing in popularity.
-
Edwin Armstrong creates FM radio with a higher dynamic range for music.
-
With the explosion of TV, radio saw a decline in popularity in the 1950s.
