These ham radio bands or frequency allocations are open to radio hams around the world to use although the actual ham radio allocations do vary slightly from country to country and region to region. In the HF portion of the radio spectrum, there is a total of 11 different bands that are allocated to ham radio operators. These bands are generally close to the same world-wide although there are variations dependent upon the country or region.
It is a narrow band of just 50kHz and is shared with the primary user. Because of the small allocation amateurs have at 10MHz, it is by agreement used only for CW and narrow band digital modes. It is an excellent DX band and normally has propagation to somewhere in the world at anytime of the day or night and at anytime in the sunspot cycle.
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While listening to the 2-meter ham band you can expect to hear normal conversations or "rag chew" as the hams call it. You may also hear a ham operator on his way home from work asking his wife if she needs anything from the store. You may hear a ham operator reporting a traffic accident and requesting emergency services.
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Forgot Password? A band plan refers to a voluntary division of a band to avoid interference between incompatible modes. You need only register once for each band.
Amateur radio frequency allocation is done by national telecommunication authorities. Globally, the International Telecommunication Union ITU oversees how much radio spectrum is set aside for amateur radio transmissions. Individual amateur stations are free to use any frequency within authorized frequency ranges; authorized bands may vary by the class of the station license.
High frequency HF is the ITU designation [1] for the range of radio frequency electromagnetic waves radio waves between 3 to 30 megahertz MHz. It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters ten to one hundred metres. Frequencies immediately below HF are denoted medium frequency MFwhile the next band of higher frequencies is known as the very high frequency VHF band. The HF band is a major part of the shortwave band of frequencies, so communication at these frequencies is often called shortwave radio.
A recommendation for all radio amateurs how to use the bands, as revised at the Interim Meeting Viennaeffective 01 June Maximum Bandwidth Hz. Preferred Mode And Usage.
They consist of 30 meters The bands were opened for use in the early s. Non-contesting radio amateurs are recommended to use the contest-free HF bands 30, 17 and 12m during the largest international contests.
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