この日
ロックの世界で何があったの？
1901年のこの日
大西洋を渡ったラジオ電波を
マルコーニが受信した日。
英国と今のカナダの間、約3500kmを、英国の高出力電波送信所から送信したラジオ電波をカナダでマルコーニが揚げたたこが受信した。
正確な周波数はわかっていないが、850kHz付近と推測されている。
(写真は大西洋を横断した電波を受信したものとは異なります)
1901Guglielmo Marconi receives the first trans-Atlantic wireless radio signal
At the turn of the 20th century, Marconi began investigating a means to signal across the Atlantic to compete with the transatlantic telegraph cables. Marconi established a wireless transmitting station at Marconi House, Rosslare Strand, County Wexford, in 1901 to act as a link between Poldhu in Cornwall, England, and Clifden in Connemara, County Galway, Ireland. He soon made the announcement that the message was received at Signal Hill in St. John's, Newfoundland (now part of Canada), on 12 December 1901, using a 500-foot (150 m) kite-supported antenna for reception – signals transmitted by the company's new high-power station at Poldhu, Cornwall. The distance between the two points was about 2,200 miles (3,500 km). It was heralded as a great scientific advance, yet there also was – and continues to be – considerable scepticism about this claim. The exact wavelength used is not known, but it is fairly reliably determined to have been in the neighbourhood of 350 metres (frequency ≈ 850 kHz).