history of the radio By aj1 1873 james clerk maxwell showed mathematically that electromagnetic waves could travel through the air 1888 heinerich hertz demonstrated maxwells theory by demonstrating that someone could produce and detect electromagnetic radiation 1892 nikola tesla used maxwells mathematic findings to demonstrate the sending and recieving of radio frequency energy 1895 marconi sent and received first radio signal 1896 guglielmo marconi who built the first wireless transmitter which was capable of sending signals up to one and a half miles 1901 guglielmo marconi developed the worlds first transatlantic radio communication service between clifton, ireland, and newfoundland 1906 lee de forest created or borrowed the idea for the audion tube, a vacuum tube that amplified signals 1922 WEAF aired a ten minute commercial 1927 FRC was established 1933 edwin h armstrong invented FM radio
