Radio Timeline

Events

James Clerk Maxwell Proves Existence of E/M Waves

Approx. 1871

Radio Waves Discovered by Heinrich Hertz

1887

Guglielmo Marconi's First Experiments

1894

Cohere is Popularized

1894

Marconi Demonstrates Radio Waves Travel Over Water

December, 1896

First Cross Channel Link

1899

First Transatlantic Transmission

December 12, 1901

Professor Ambrose Fleming Invents Diode Valve

1904

De Forest Invents Triode

1906

Triode Used As Amplifier

1912

Edwin Armstrong Invents Superhet

1918

Early Broadcasts by Marconi Company

1920

Short Wave Transatlantic Success

1921

BBC Formed

1922

Scopes Trial

1925

International Broadcasting

1925

FM Radio Waves Discovered

1934