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The Topolná transmitter (Czech: RKS Topolná) is the central longwave broadcasting facility of the Czech Republic situated westward of the village Topolná at the Morava River. == History == Longwave frequency 272 kHz was assigned to Czechoslovakia in 1948 (the Copenhagen frequency plan).〔(1948 Copenhagen Frequency Plan )〕 Before, during the WWII, it was used by German Deutschlandsender. Construction of new transmitter started in 1950 and finished in December 1951. Tests lasted until February 1952. Its power output was 400 kW (2x 200 kW). In the beginning it was transmitting radio programme "Československo 1", later "Hvězda". Between 1957–1958 Topolná was also used to transmit a Hungarian radio programme on wavelength 49 meters. Between 1953–1960 and again between 1969–1973 one of its masts was used for transmission on frequency 173 kHz. During years 1975–1978 the trasmitter was reconstructed and since November 1978 its transmission power increased to 1500 kW. On October 1, 1989 the frequency was changed to 270 kHz. After the Velvet Revolution (1989) the transmitted programme was renamed from "Hvězda" to "Radiožurnál". In January 1994 one of the masts was switched off, reducing the output power to 750 kW, to bring down the costs. Further reduction of output power followed in January 2002, to 650 kW. As there were nearly no other transmitters working on the frequency 270 kHz its programme ("ČRo 1 - Radiožurnál") was well received in whole Europe, especially at nighttime.〔(History of tramsitter Topolná ) (in Czech language)〕 Since the mid-2000s Czech Radio announced its intention to close down the transmitter several times. In late 2013 it was announced that the broadcasts would cease on February 28, 2014. However the station is reportedly still on air, albeit now at greatly reduced power.〔http://www.rozhlas.cz/vysilace/vysilace/?stanice=1〕 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「Topolná transmitter」の詳細全文を読む スポンサード リンク
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