Radio Broadcasting By JaylinHines Sep 11, 1888 Heinrich Hertz detects and produces radio waves. Apr 13, 1895 First Radio Signal Sep 9, 1904 First radio transmission of music Aug 13, 1905 Marconi invents the directional radio antennae. Jun 5, 1906 First radio program of voice and music broadcast in the U.S. Sep 11, 1906 Audion Tube Aug 14, 1908 GE develops a 100 kHz, 2 kW alternator for radio communication. Jun 7, 1913 The cascade-tuning radio receiver and the heterodyne receiver are introduced. Nov 13, 1919 Shortwave radio is developed.RCA is founded. Jul 17, 1920 First Radio Station Oct 27, 1928 A radio statio in NYC, WRNY begins to broadcast television shows. Aug 3, 1935 FM radio is born Feb 21, 1945 Television is born. FM is moved from its original home of 42-50 Mhz to 88-108 Mhz to make room for TV. Dec 7, 1946 There are six TV stations in the nation. Oct 17, 1961 FCC approves FM stereo broadcasting, which spurs FM development.