Amateur radio is a technical-scientific hobby and a telecommunication service (Amateur and Amateur Service via Satellite [1]). It is practiced in almost every country in the world by people qualified and licensed by the telecommunications authorities for intercommunication and technical studies without a profit. Amateur radio has national and international legislation that regulates the conditions of use and radio frequencies for the activity that must be followed by practitioners, called radio amateurs. Amateur radio should not be confused with the Citizen Radio Service (known as PX in Brazil) or Private Limited Service (exercised in radio announcements by professional categories such as drivers,
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