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A mast radiator or mast antenna is a radio tower or mast in which the whole structure is an antenna. Mast antennas are the transmitting antennas typical for long or medium wave broadcasting. Structurally, the only difference is that some mast radiators require the mast base to be insulated from the ground.
The radio frequency current from the transmitter is supplied to the antenna through a cable called the feedline.The antenna tuning hut contains a matching network made of high wattage capacitors and inductors (coils) that in combination match the antenna's impedance to the feedline, to efficiently transfer power into the antenna.
A mast radiator (or radiating tower) is a radio mast or tower in which the metal structure itself is energized and functions as an antenna. This design, first used widely in the 1930s, is commonly used for transmitting antennas operating at low frequencies , in the LF and MF bands, in particular those used for AM radio broadcasting stations.
Austin ring transformer at the base of a WMCA and WNYC transmitting tower in Kearny, New Jersey. The two interlocking rings are the primary and secondary transformer windings. The spherical objects directly below and to the right of the windings are a spark ball gap, for lightning protection.
An antenna tuner, a matchbox, transmatch, antenna tuning unit (ATU), antenna coupler, or feedline coupler is a device connected between a radio transmitter or receiver and its antenna to improve power transfer between them by matching the impedance of the radio to the antenna's feedline. Antenna tuners are particularly important for use with ...
Replaced by triangle antenna Liechtenstein-Haberfeld transmitter November 21, 1938: Storm Utbremen Radio Tower, Bremen, Germany 1939: Free standing wood lattice tower 90 Lightning Replaced by steel tower Radio Normandie Transmitter, Tower West, Fécamp, France [2] November 7, 1940: Free standing lattice tower 113 Storm Langenberg, Germany 1949
Wire rope guys are frequently used and segmented with insulators at several points. Extensive lightning protection is required for insulated towers. On antennas for long-wave and VLF, the guys may serve an electrical function, either for capacitive lengthening of the mast or for feeding the mast with the radiation power. In these cases, the ...
Powerline worker performs maintenance of a lightning arrester on an electrical transmission tower in New Brunswick, Canada. A lightning arrester (alternative spelling lightning arrestor) (also called lightning isolator) is a device, essentially an air gap between an electric wire and ground, used on electric power transmission and telecommunication systems to protect the insulation and ...