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first radio waves
Heinrich Hertz detects and produces radio waves. -
first radio equipment is built
Marchese Guglielmo Marconi builds his first radio equipment, a device that will ring a bell from 30 ft. away. -
first human speech via radio
American scientist R.A. Fessenden transmists human speech via radiowaves. -
marconi sends radio message
Marconi transmits telegraphic radio messages from Cornwall to Newfoundland -
Fessenden invents first electric radio
Fessenden invents a high-frequency electric generator that produces radio waves with a frequency of 100 kHz. -
radio gains publicity
Radio communications gain publicity when the captain of the Montrose alerts Scotland via radio of an escaping criminal. -
new radio introduced
The cascade-tuning radio receiver and the heterodyne receiver are introduced. -
Edwin Armstrong patents a radio receiver
Fessendenpatents a radio receiver circuit with positive feedback. Part of the amplified high-frequency signal is fed back to the tuning circuit to enhance selectivity and sensitivity. -
first regular licensed radio
KDKA broadcasts the first regular licensed radio broadcast out of Pittsburgh, PA. -
RCA starts operating Radio Central on Long Island
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. -
University of Michigan gets broadcasting rights
March: WWJ, an AM station in Detroit, offers the University of Michigan broadcasting rights for extension lectures. -
dreese submits a proposal for um operated station
um professor Dreese submits a proposal for several UM operated stations. His proposal was tabled by the Regents, who were not concerned with radio at the time.
