| dbo:abstract |
The 15-meter band (also called the 21-MHz band or 15 meters) is an amateur radio frequency band spanning the shortwave spectrum from 21 to 21.45 MHz. The band is suitable for amateur long-distance communications, and such use is permitted in nearly all countries. Because 15-meter waves propagate primarily via reflection off of the F-2 layer of the ionosphere, the band is most useful for intercontinental communication during daylight hours, especially in years close to solar maxima, but the band permits long-distance without high-power station equipment outside such ideal windows. The 15-meter wavelength is harmonically related to that of the 40-meter band, so it is often possible to use an antenna designed for 40 meters. (en) Als 15-Meter-Band bezeichnet man den Frequenzbereich von 21,0 MHz bis 21,45 MHz. Er gehört zum Kurzwellenbereich. Der Name leitet sich von der ungefähren Wellenlänge des Bereiches ab. (de) La banda de 15m es una banda de radioaficionado de propagación diurna. (es) La bande 21 MHz désignée aussi par sa longueur d'onde, 15 mètres, est une bande du service radioamateur destinée à établir des radiocommunications de loisir. Cette bande est utilisable pour le trafic intercontinental et continental lorsqu’il fait jour entre le lieu d’émission et de réception. (fr) Pasmo 15 m – jedno z podstawowych pasm częstotliwości amatorskich, zawierające się w granicach: 21,000 do 21,450 MHz dla krótkofalowców na całym świecie. (pl) |
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dbr:Band |
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| rdfs:comment |
Als 15-Meter-Band bezeichnet man den Frequenzbereich von 21,0 MHz bis 21,45 MHz. Er gehört zum Kurzwellenbereich. Der Name leitet sich von der ungefähren Wellenlänge des Bereiches ab. (de) La banda de 15m es una banda de radioaficionado de propagación diurna. (es) La bande 21 MHz désignée aussi par sa longueur d'onde, 15 mètres, est une bande du service radioamateur destinée à établir des radiocommunications de loisir. Cette bande est utilisable pour le trafic intercontinental et continental lorsqu’il fait jour entre le lieu d’émission et de réception. (fr) Pasmo 15 m – jedno z podstawowych pasm częstotliwości amatorskich, zawierające się w granicach: 21,000 do 21,450 MHz dla krótkofalowców na całym świecie. (pl) The 15-meter band (also called the 21-MHz band or 15 meters) is an amateur radio frequency band spanning the shortwave spectrum from 21 to 21.45 MHz. The band is suitable for amateur long-distance communications, and such use is permitted in nearly all countries. (en) |
| rdfs:label |
15-Meter-Band (de) 15-meter band (en) Banda de 15m (es) Bande des 15 mètres (fr) Pasmo 15 m (pl) Діапазон 15 метрів (uk) |
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