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1888
Heinrich Hertz detects and produces radio waves. -
1894
Marchese Guglielmo Marconi builds his first radio equipment, a device that will ring a bell from 30 ft. away. -
1900
American scientist R.A. Fessenden transmits human speech via radio waves. -
1901
Marconi transmits telegraphic radio messages from Cornwall to Newfoundland -
1903
Valdemar Poulson patents an arc transmission that generates continuous radio waves, producing a frequency of 100 kHz and receivable over 150 miles. -
1904
First radio transmission of music at Graz, Austria -
1905
Marconi invents the directional radio antennae. -
1921
RCA starts operating Radio Central on Long Island.
The American Radio League establishes contact via a shortwave radio with Paul Godley in Scotland, proving that shortwave radio can be used for long distance communication.