15 meter tape
The frequency range from 21.0 MHz to 21.45 MHz is called the 15-meter band . It belongs to the shortwave range . The name is derived from the approximate wavelength of the area.
Propagation conditions
The propagation conditions of the 15 meter band are very dependent on the number of sunspots . During the sunspot minimum, there are only short band openings during the day in the summer months; during the winter time, there can even be total failures that can last for several days. All the more, at maximum solar activity, supported by low attenuation, very long distances can be bridged even with low power. Atmospheric disturbances have no effect on the belt.
15 meter amateur band
Band plan
The amateur radio - band plan is as follows:
Frequency range | Max. Bandwidth | use |
---|---|---|
21.000-21.070 MHz | 200 Hz | CW, activity center QRS 21.055 MHz, activity center QRP 21.060 MHz |
21.070-21.090 MHz | 500 Hz | Narrow band, digimode |
21.090-21.110 MHz | 500 Hz | Narrow band, digimode, automatic stations |
21.110-21.120 MHz | 2700 Hz | all operating modes (no SSB), automatically working stations |
21.120-21.149 MHz | 500 Hz | Narrow band |
21.149-21.151 MHz | - | international beacon project, no broadcasting |
21.151-21.450 MHz | 2700 Hz | all modes of operation, activity center SSB QRP 21.285 MHz, activity center “Worldwide Emergency Radio” 21.360 MHz |
literature
- Hans Heinrich Meinke , Friedrich-Wilhelm Gundlach , Klaus Lange, Karl-Heinz Locher: Pocket book of high frequency technology: Volume 1: Basics . Springer, 1992, ISBN 978-3-540-54714-3 ( limited preview in Google book search).
Web links
- Frequency usage plan according to § 54 TKG of the Federal Network Agency