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Georg Wilhelm Alexander Hans Graf von Arco (30 August 1869 in Großgorschütz – 5 May 1940 in Berlin) was a German physicist, radio pioneer, and one of the joint founders of the "''Society for Wireless Telegraphy''" which became the Telefunken company. He was an engineer and the technical director of Telefunken. He was crucial in the development of wireless technology in Europe. Arco served for a time as an assistant to Adolf Slaby, who was close to William II, German Emperor. Until 1930, Arco was one of the two managing directors of the company. He participated in the development of high performance tube transmitters. Together with his teacher, Slaby, he was considerably involved in the study and development of high-frequency engineering in Germany. He was a Monist and a pacifist. Between 1921-22, he was a chairman of the German Monist Federation. ==Early years== Arco was born on the estate of his father, Count Alexander Karl von Arco, in Großgorschütz, Upper Silesia, Prussia (now Gorzyce, Poland). As a child he was interested in machines of all kinds, but after graduating from the Maria Magdalenen High School in Breslau (now Wrocław, Poland) in 1889, he did not study engineering sciences, but instead attended mathematical and physical lectures at the University of Berlin. Afterwards he took up a military career, a family tradition. After three years with the military, however, he left to study mechanical engineering and electro-technology in the technical university in Charlottenburg, Berlin, from 1893. There he became acquainted with Professor Adolf Slaby, who had participated in Guglielmo Marconi's transmission experiments on the coast of the English Channel. Building on these attempts, Arco and Slaby in the summer of 1897 used the free-standing bell tower of the Church of the Redeemer, Potsdam, as an antenna, to verify and understand Marconi's experiments. Here the first German antenna system for wireless telegraphy was established. On 27 August a radio transmission to the German naval base "Kongsnaes," 1.6 kilometers away, was successful. In 1928 a plaque was fixed over the door of the bell tower of the Church of the Redeemer to commemorate to this feat. In the centre of the plaque, which is made from green dolomite, is Atlas with the globe, surrounded by lightning and the text: "At this place in 1897 Professor Adolf Slaby and Count von Arco erected the first German antenna system for wireless communication". On 7 October 1897, the first radio link from Schöneberg to Rangsdorf in Berlin was successful, and the following summer Jüterbog, about 65 km (40 mi) southwest of Berlin, could be reached. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Georg von Arco」の詳細全文を読む スポンサード リンク
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