Llanddona transmitting station
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| Mast height | 106.7 metres (350 ft) |
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| Coordinates | 53°18′25″N 4°07′42″W / 53.3069°N 4.1283°WCoordinates: 53°18′25″N 4°07′42″W / 53.3069°N 4.1283°W |
| Grid reference | SH583810 |
| Built | 1958 |
| BBC region | BBC Wales |
| ITV region | ITV Wales |
The Llanddona transmitting station is a broadcasting and telecommunications facility, situated at Llanddona, near Beaumaris, on the isle of Anglesey, Wales (grid reference SH583810). It comprises a 106.7 metres (350 ft) guyed mast with antennas attached at various heights. It is owned and operated by Arqiva.
The station was built by the BBC in 1958 to provide a 405-line Band I (VHF) TV service and (later) a VHF (FM) radio services for north west Wales, including the Lleyn peninsula, Anglesey and the north Wales coast. ITV's service was provided from the Arfon transmitting station, approximately 20 miles to the south on the mainland.
In 1967 the site became the area's main station for 625 line colour UHF TV, starting with just BBC Two in June of that year. By this time, it was policy to co-site all UHF TV services at the same site, and by 1973 Llanddona was broadcasting BBC One, BBC Two and ITV on UHF. S4C was added later in 1982 in time for its launch.
Though 405-line TV was discontinued in the UK in 1985, it seems that Llanddona shut down its VHF TV a year early.
In the late 1990s, digital TV transmitters were added, carrying all six national multiplexes.
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