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A special form of the radio tower is the telescopic mast. These can be erected very quickly. Telescopic masts are used predominantly in setting up temporary radio links for reporting on major news events, and for temporary communications in emergencies. They are also used in tactical military networks.
While at the Custer Institute, Katz's childhood interest in amateur radio resurfaced. He revitalized the institute's amateur radio and radio astronomy programs and arranged the donation and installation of a 55 foot crank-up radio tower from the Great South Bay Amateur Radio Club (of which he is still a member). [citation needed]
An amateur radio license is valid only in the country where it is issued or in another country that has a reciprocal licensing agreement with the issuing country. [42] [43] In some countries, an amateur radio license is necessary in order to purchase or possess amateur radio equipment. [44]
An amateur radio station is a radio station designed to provide radiocommunications in the amateur radio service for an amateur radio operator. Radio amateurs build and operate several types of amateur radio stations, including fixed ground stations, mobile stations, space stations, and temporary field stations.
The tower fell onto a nearby utility line which provided power to the remainder of Duluth's television and FM radio stations, and all but one AM radio station. Telephone and power lines snapped leaving Duluth and many northeastern Minnesota communities without utility services for 24 hours.
Amateur radio repeaters may even use commercially packaged repeater systems that have been adjusted to operate within amateur radio frequency bands, but more often amateur repeaters are assembled from receivers, transmitters, controllers, power supplies, antennas, and other components, from various sources.