History of radio

First experiments with wireless communication

1830

This is when people were interested enough to start testing.

Discovered that electromagnetic waves could propagate through free space.

1864

James Clerk Maxwell showed in theoretical and mathematical form in 1864 that electromagnetic waves could propagate through free space.

First completed wireless telegraph

1894

Over several years starting in 1894 the Italian inventor Guglielmo Marconi built the first complete, commercially successful wireless telegraphy system based on airborne Hertzian waves

First human voice transmitted

1900

In 1900, Brazilian priest Roberto Landell de Moura transmitted the human voice wirelessly for a distance of approximately a half mile

First radio broadcast

Dec 24, 1906

On Christmas Eve 1906, Reginald Fessenden used a synchronous rotary-spark transmitter for the first radio program broadcast, from Ocean Bluff-Brant Rock, Massachusetts

first radio factory

1912

June 1912 Marconi opened the world's first purpose-built radio factory at New Street Works in Chelmsford, England.

First radio news program

Aug 31, 1920

The first radio news program was broadcast August 31, 1920 by station 8MK in Detroit, Michigan,

First portable radio

1950

In 1955, the newly formed Sony company introduced its first transistorized radio.[47] It was small enough to fit in a vest pocket, powered by a small battery.