Mariachi tradicional with other ensembles of the region, like "conjunto calentano", "conjunto de arpa grande", "conjunto de jaraberos" and "conjunto de son de tarima" of the so-called Mexican son. Mariachi tradicional Traditional mariachi is a string ensemble from western México. Unlike the popular mariachi, this ensemble generally does not include trumpets. It consists of violins, guitarra de golpe, vihuelas, harp and guitarrón or double bass, and in some zones a bass drum is used. This mariachi developed from the beginning of 19th century and from this ensemble derived the mariachi with trumpets. Its repertoire generally covered "sones abajeños", "sones arribeños", "sones costeños"
WARC bands codified in official recommendations, such as the IARU Region 1 HF Manager's Handbook, which states: Contest activity shall not take place on the 10, 18 and 24 MHz bands. Non-contesting radio amateurs are recommended to use the contest-free HF bands (30, 17 and 12m) during the largest international contests. (DV05_C4_Rev_07) Canada is part of region 2 and as such is subject to the IARU band plan. Radio Amateurs of Canada offers the bandplan below as a recommendation for use by radio amateurs in that country but it does not have the force of law and should only be considered a