10to20meter

10to20meter refers to a specific range of radio frequencies, specifically from 10 to 20 megahertz. This frequency band is part of the High Frequency (HF) spectrum, which is known for its ability to propagate signals over long distances via skywave. The 10to20meter band is particularly popular among amateur radio operators, also known as "hams."

Within the 10to20meter range, several amateur radio bands are allocated. These include the 15-meter band (21.000 to 21.450 MHz) and the 20-meter band (14.000 to 14.350 MHz). The 17-meter band (18.068 to 18.168 MHz) is also situated within this broader range. These bands are used for voice communication (Single Sideband or SSB), Morse code (Continuous Wave or CW), and various digital modes.

The propagation characteristics of the 10to20meter frequencies are influenced by ionospheric conditions, which vary with time of day, season, and the solar cycle. Generally, the 20-meter band is considered a reliable choice for worldwide communication during daylight hours and into the early evening. The 15-meter band often performs best during the daytime and can offer excellent long-distance contacts, especially during periods of high solar activity. The 17-meter band also exhibits good long-distance capabilities, often providing a bridge between the performance of the 20-meter and 15-meter bands. These bands are favored by operators seeking to communicate with stations in distant parts of the world.