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Llanddona transmitting station: Wikis


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Height of mast 106.7 metres (350 ft)
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 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. 405-line TV was discontinued in the UK in 1985.

A few years later, the BBC's high power VHF (FM) radio services were added, including the Home Service, the Light Programme and the Third Programme.

In 1973 the site was chosen to become the area's main station for 625 line colour UHF TV. By this time, it was policy to co-site all UHF TV services at the same site, so Llanddona began broadcasting BBC One, BBC Two and ITV on UHF. S4C was added later in 1982 in time for its launch.

In the late 1990s, digital TV transmitters were added, carrying all six national multiplexes.

In 2006, digital radio transmitters were added for the BBC's national multiplex and also Digital One.

On Wednesday, 21st October 2009, the Llanddona group of transmitters underwent the first stage of the Digital Switchover, with BBC2's analogue signal was effectively replaced by an expanded version of Multiplex 1 (with several channels, such as BBC Four and radio stations available on both BBC Multiplexen).

On Wednesday, 18th November 2009, analogue television was finally turned off from Llanddona and its group of transmitters as it underwent the second stage of the Digital Switchover. Whilst the old analogue channels were in the UK UHF C/D aerial group, the new DVB channels are now spread over into the E group (presumably to avoid co-channel interference with Winter Hill transmitter), meaning that some customers may need to replace their aerial to get optimum reception.

Llanddona was the site of the first TV, VHF radio, digital TV and digital radio broadcasts for the area.

Channels listed by Frequency

  • Analogue Radio
Frequency Station KW
89.8 MHz BBC Radio 2 21.000
92.0 MHz BBC Radio 3 21.000
94.2 MHz BBC Radio Cymru 21.000
94.8 MHz BBC Radio Wales 10.000
99.4 MHz BBC Radio 1 21.000
103.9 MHz BBC Radio 4 21.000
Block Frequency Platform KW
11D 222.064 MHz Digital One 1.0
12B 225.648 MHz BBC 5.0


UHF CH. KW Multiplex A.G. Pol.
43 10.0 SDN W H
46 10.0 Arqiva A W H
50 10.0 Arqiva B W H
53 20.0 BBC B W H
57 20.0 Digital 3&4 W H
60 20.0 BBC A W H

Information correct as of November 18th 2009.

See also


  1. ^ Radio Listeenrs Guide 2010

External links

Coordinates: 53°18′25″N 4°7′42″W / 53.30694°N 4.12833°W / 53.30694; -4.12833



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