-
" Italian inventor Guglielmo Marconi built the first complete, commercially successful wireless telegraphy system based on airborn Herzian waves (radio transmission)."
-
"a young Italian named Gugliemo Marconi invented what he called “the wireless telegraph”"
-
"Columbia University electrical engineering student Edwin Howard Armstrong devises a regenerative circuit for the triode that amplifies radio signals. By pushing the current to the highest level of amplification".
-
"station KDKA in Pittsburgh becomes radio’s first scheduled commercial programmer with its broadcast of the Harding-Cox presidential election returns, transmitted at 100 watts from a wooden shack atop the Westinghouse Company’s East Pittsburgh plant".http://www.greatachievements.org/?id=3659
-
"Edwin Howard Armstrong develops frequency modulation, or FM, radio as a solution to the static interference problem that plagues AM radio transmission, especially in summer when electrical storms are prevalent. "
-
"radio format moved to FM, AM radio stations were left with fewer and fewer options."
