Topolná Transmitter
The Topolná transmitter () was the central longwave broadcasting facility of the Czech Republic situated in the municipality of Topolná near the Morava (river), Morava River. Constructed in the early 1950s, it was used for broadcasting until the end of 2021, and its masts were blasted down in 2022. History The longwave frequency 272 kHz was assigned to Czechoslovakia in the Copenhagen Frequency Plan of 1948. It had previously been used by German Deutschlandsender during World War II. Construction of a new transmitter began in 1950 and was completed in December 1951. Tests lasted until February 1952. Its power output was 400 kW (2x 200 kW). In its first broadcasts it was transmitting the radio programme "Československo 1", later "Hvězda". From 1957–1958 Topolná was also used to transmit a Hungarian radio programme on 49 meter wavelength. From 1953–1960 and again from 1969–1973 one of its masts was used for transmission on frequency 173 kHz. Between 1 ...
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RKS Topolná (od Spytihněvi)
RKS may refer to: * Designation for transmission facilities in Czech, for example RKS Liblice 1 * Kosovo, license plate code * Rainbow Kitten Surprise, an American alternative rock band ** RKS, their second studio album released in 2015 * Remote keyless system * Rock Springs - Sweetwater County Airport * Rotterdamse Kunststichting The Rotterdamse Kunststichting RKS (''Rotterdam Arts Council'') was an independent foundation to promote art and culture in Rotterdam from 1945 to 2005. In 2005 the foundation merged into the Rotterdam Council for Art and Culture, an advisory body ...

Ground Isolation
Ground may refer to: Geology * Land, the solid terrestrial surface of the Earth * Soil, a mixture of clay, sand and organic matter present on the surface of the Earth Electricity * Ground (electricity), the reference point in an electrical circuit from which voltages are measured * Earthing system, part of an electrical installation that connects with the Earth's conductive surface * Ground and neutral, closely related terms Law * Ground (often grounds), in law, a rational motive or basis for a belief, conviction, or action taken, such as a legal action or argument: * Grounds for divorce, regulations specifying the circumstances under which a person will be granted a divorce Music * ''Ground'' (album), the second album by the Nels Cline Trio * "Ground" (song), one of the songs in the debut album of the Filipino rock band Rivermaya * Ground bass, in music, a bass part that continually repeats, while the melody and harmony over it change * '' The Ground'', a 2005 album by Norwe ...
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Longwave Radio Stations
In radio, longwave (also spelled long wave or long-wave and commonly abbreviated LW) is the part of the radio spectrum with wavelengths longer than what was originally called the medium-wave (MW) broadcasting band. The term is historic, dating from the early 20th century, when the radio spectrum was considered to consist of LW, MW, and short-wave (SW) radio bands. Most modern radio systems and devices use wavelengths which would then have been considered 'ultra-short' (i.e. VHF, UHF, and microwave). In contemporary usage, the term ''longwave'' is not defined precisely, and its intended meaning varies. It may be used for radio wavelengths longer than 1,000 m i.e. frequencies smaller than 300 kilohertz (kHz), including the International Telecommunication Union (ITU) low frequency (LF, 30–300 kHz) and very low frequency (VLF, 3–30 kHz) bands. Sometimes the upper limit is taken to be higher than 300 kHz, but not above the start of the medium wave bro ...
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