Cairn Hill transmission site, Transmission site on Carn Clonhugh hill near Longford, Ireland
The Cairn Hill transmission site features a 144.5-meter mast situated at an elevation of 277 meters in Dernacross, northeast of Longford town.
Established in 1978, Cairn Hill became the first of two UHF television transmission sites opened by RTÉ, with an initial Effective Radiated Power of 800 kW.
The facility expanded Irish broadcasting capabilities by enabling the introduction of RTÉ 2, addressing the limitations of available VHF frequencies in the region.
The site broadcasts digital television across frequencies including 682 MHz and 658 MHz, while FM radio services operate on multiple channels between 89.8 and 103.1 MHz.
The transmission facility reaches beyond its intended coverage area, extending signals into Northern Ireland and functioning as a cross-border communications bridge.
GPS coordinates: 53.80711,-7.71514
Latest update: March 5, 2025 10:27
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