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Vigra transmitter was a transmitter factility for medium wave broadcasting near Vigra in Norway. The Vigra transmitter was inaugurated in 1934. It was used until 1953 for transmission with a T-antenna. This antenna was replaced in 1952/53 by a guyed, steel-tube mast radiator insulated against the earth with a height of 243 metres. In 1999, the height of the mast was reduced for air traffic safety reasons to 232 metres. The Vigra transmitter frequency was 630 kHz with a power of 100 kilowatts, enabling it to be received at night in much of Europe, with the daytime signal taking in Iceland, the Faroes, Shetland and Orkney Islands, Scotland and up to Andøya Island in Norway. The service was shut down on June 30, 2011, and the 232 m high antenna was demolished on September 8, 2011 with help from the Norwegian Armed Forces using explosives. ==External links== * http://www.waniewski.de/id295.htm *(Bernt Erfjord: Norske Kringkastingssendere(Vintage Norwegian AM Transmitters)(In Norwegian) ) *(Oversikt over Norske Kringkastere utarbeidet ved samarbeid mellom DX-Listeners' Club (DXLC) og Just N. Qvigstad (In Norwegian) ) 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「Vigra transmitter」の詳細全文を読む スポンサード リンク
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