Divis Transmitter / Dubhais tarchuradóir

Coordinates / Comhordanáidí: 54°36'27" N, 06°00'32" W ; Elevation / Airde: 476 m (1562 ft); Tower height / Airde túr: 141.7 m (465 ft)
The Divis transmitting station is located in a range of hills directly overlooking Belfast to the west, in an area which for many years was controlled by the Ministry of Defence, until it was sold in 2004 to the National Trust and subsequently opened to the public. The Divis is the main high-power UHF and BBC National FM/DAB station that serves County Antrim and parts of County Down. Sited just outside Belfast, it is the primary UHF/FM main station in Northern Ireland. Divis was opened by the BBC on 21 July 1955 as the first permanent television transmitter to be established within Ireland.



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Black Mountain / An Sliabh Dubh

Coordinates / Comhordanáidí: 54°35'13" N, 06°01'20" W ; Elevation / Airde: 388.6 m (1275 ft); Tower height / Airde túr: 228.6 m (750 ft)
The Black Mountain transmitting station is a broadcasting and telecommunications facility, situated on land 300.8 metres (987 ft) above mean sea level to the west of the city of Belfast, in Northern Ireland. It was built in 1959 and is owned and operated by Arqiva.



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Lisburn (Lisnagarvey) Transmitter / Lios na gCearrbhach tarchuradóir

Coordinates / Comhordanáidí: 54°29'23" N, 06°03'37" W ; Elevation / Airde: 44.3 m (145 ft); Tower height / Airde túr: 108 m (354 ft)
The Lisnagarvey transmitting station is a facility for mediumwave broadcasting located on the south western edge of the town of Lisburn, Northern Ireland. The station was built by the BBC for the Regional Programme to be transmitted to Northern Ireland and it went into service in 1936. It is now owned by National Grid Wireless. The station includes three radio masts, including two standard lattice masts and one diamond shaped Blaw-Knox Radiator. The two standard lattice masts have a wire slung T-antenna suspended between them. The Blaw-Knox radiator is the only one of its kind in Western Europe. The height of a Blaw-Knox radiator is related to the frequency (or wavelength) of the service transmitted, and for maximum efficiency should be exactly one half wavelength. Its height was originally 475 ft (144.8 metres), but it was shortened when the station's broadcast frequency was changed. Similar masts in Europe can be found nowadays only at Lakihegy, Hungary, at Riga, Latvia, at Vakarel, Bulgaria and at Stara Zagora, Bulgaria; in the US: WFEA tower in Manchester, New Hampshire, WBT-AM tower in Charlotte, North Carolina, WSM-AM tower in Nashville, Tennessee, WLW-AM tower in Cincinnati, Ohio.



More info: Wikipedia ; MB21