Alfonso Marconi (1865 – 1936) was an Italian businessman and collector of stringed instruments, most famous for assisting his younger brother Guglielmo Marconi in his pioneering work on long-distance radio transmission
Alfonso Marconi was born into the Italian nobility in 1865, the first son of Giuseppe Marconi (an Italian aristocratic landowner from Porretta Terme) and of his Irish/Scots wife, Annie Jameson (daughter of Andrew Jameson of Daphne Castle in County Wexford, Ireland, and granddaughter of John Jameson, founder of whiskey distillers Jameson & Sons). Alfonso was educated at Bedford School in England between 1876 and 1880, during his peripatetic childhood.
Alfonso Marconi assisted his younger brother Guglielmo Marconi with his early experiments, and in the summer of 1895 Guglielmo moved his experimentation outdoors. After increasing the length of transmitter and receiver antennas, arranging them vertically, and positioning an antenna so that it touched the ground, Guglielmo significantly increased the range he could achieve.
Alfonso stood on one side of a hill near to the family home of Villa Griffone in Pontecchio, Italy, and fired a shot which was transmitted over the hill to Guglielmo: a distance of approximately 2.4 kilometres (1.5 mi). Guglielmo concluded that, with additional funding and research, a device could become capable of spanning greater distances and would prove valuable both commercially and militarily.
Alfonso Marconi was a director of the American International Marine Communication Company and an avid collector of stringed instruments. He died suddenly at a London hotel on the evening of Friday 24 April 1936 following a heart attack (his brother died following a heart attack in 1937).
Marconi is a surname. Notable people with the surname include:
Alfonso Marconi (1865–1936), Italian businessman and collector
Andrea Marconi (born 1985) Italian footballer
David Marconi, American screenwriter
Dominic Anthony Marconi (born 1927), American Roman Catholic bishop
Enrico Marconi, also known as Henryk Marconi (1792–1863), Italian architect
Francesco Marconi (1853 or 1855–1916), Italian operatic tenor
Gaudenzio Marconi (1841–1885), Italian photographer
Gioia Marconi Braga (1916−1996), daughter of Guglielmo Marconi, founder and chairwoman of the Marconi Foundation
Gloria Marconi (born 1968), Italian long-distance runner
Guglielmo Marconi (1874–1937), Italian electrical engineer and inventor of radio
Ivan Marconi (born 1989), Italian footballer
Juan Martínez Marconi (born 1982), Chilean footballer
Joe Marconi (1934–1992), American football fullback
Lana Marconi (1917–1990), Romanian-French actress
Leandro Marconi (1834–1919), architect, son of Enrico Marconi
Leonard Marconi (1835–1899), Polish and Austro-Hungarian architect and sculptor
Lou Marconi (born 1973), American professional wrestler, trainer, and occasional actor
Maria Marconi (born 1984), Italian diver
Michele Marconi (born 1989), Italian footballer
Nicola Marconi (born 1978), Italian diver
Rocco Marconi (before 1490–1529), Italian painter
Saverio Marconi (born 1948), former Italian actor and stage director
Tommaso Marconi (born 1982), Italian diver
Władysław Marconi (1848-1915), Polish architect