Arranmore Island transmitter

Arranmore Island transmitter

The Arranmore Island transmitter is a relay station used by RTÉ Networks Limited and Highland Radio to provide coverage to Arranmore Island, Ireland, and much of The Rosses, which are shielded by mountains from the main transmissions. Two towers exist, the smaller of which belongs to Highland, and the significantly larger to RTÉ Networks. The EIRP of the stations transmitted by RTÉ Networks is amongst the highest of any relay station. The site is 125 m above sea level, with the RTÉ antenna standing at 45 metres.

The construction of the RTÉ mast in the 1990s was controversial for a number of reasons, one of them being that the allocated television frequencies (which had been reserved and known for some time) interfered with then-unlicenced relay broadcasts of British television channels in parts of Count Donegal. During construction, the partially constructed mast was felled, with the culprit(s) being unknown. There were also robberies of equipment from the construction site.

A 1kW transmitter, on 104.0 MHz, has been proposed for the i102-104 radio station which launched in February 2008. Both O2 Ireland and Vodafone Ireland have transmission stations on the RTÉ mast.

Three television stations and 6 radio services are carried from the site.

Channels listed by frequency

*Analogue radio
**89.6 MHz RTÉ Radio 1 - 3 kW
**91.8 MHz RTÉ 2fm - 3 kW
**94.0 MHz Raidió na Gaeltachta - 3 kW
**95.2 MHz Highland Radio - 500W
**99.2 MHz RTÉ Lyric FM - 3 kW
**101.4 MHz Today FM - 3 kW
*Analogue television
**UHF 39 RTÉ One - 8 kW
**UHF 42 RTÉ Two - 8 kW
**UHF 49 TG4 - 8 kW

UHF 45 is allocated to but unused by TV3. 41, 44, 47 and 51 are allocated for Digital terrestrial television but as yet have not been used in DTT trials or for full services, with the islands transmitter being a List B (secondary level of importance) transmission site in the 2007 DTT process documents.


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