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The Preseli transmitting station (also spelt Presely) is a broadcasting and telecommunications facility, situated close to the village of Crymych, in Pembrokeshire, Wales (). It is owned and operated by Arqiva. It has a high guyed steel lattice mast. It was constructed in 1962 by the IBA to transmit ITV 405-line television with transmissions commencing on Band III channel 8 from antennas at above sea level. The triangle of antenna arrays aimed beams of signal towards Pembrokeshire, another lobe was directed towards western Carmarthenshire and a northward beam covered south western Cardiganshire. The northward beam from the site also fed the transmitter at Arfon in North Wales. The Welsh region ITV programming was initially provided by Teledu Cymru which was taken over by TWW in 1964, and eventually HTV Wales who took over from 1968. In 1971, three protesters from Cymdeithas yr Iaith Gymraeg were jailed for "conspiring to trespass" after gaining access to the site compound and climbing the lower section of the mast. This was part of a series of protests in Wales aiming to get a dedicated Welsh-language TV channel established. The campaign was eventually considered to have been mostly successful with the establishment of S4C (Sianel 4 Cymru) eleven years later. The site was uprated in 1973 to transmit UHF 625-line PAL analogue television channels, starting with BBC1, BBC2 and HTV Wales, with S4C being added in late 1982. The VHF channel 8 transmissions were discontinued in January 1985 as 405-line TV in the UK was phased out. Channel 5 started analogue TV transmissions in 1997. Six digital TV multiplexes were added in 1998 and the site kept this configuration until 2009, when all analogue television signals were permanently switched off. The mast also carries Classic FM on 100.5 MHz and Real Radio on 105.7 MHz, and transmits national digital radio multiplexes for the BBC and Digital One multiplexes. ==Transmissions== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Preseli transmitting station」の詳細全文を読む スポンサード リンク
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