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The Machynlleth transmitting station is a broadcasting and telecommunications facility located on a hill about west of the town of Machynlleth, in Gwynedd, Wales. It was originally built by the BBC,〔http://downloads.bbc.co.uk/rd/pubs/reports/1965-28.pdf〕 entering service in June 1965 acting as a relay transmitter for the now-defunct 405-line VHF television system. ==Specifications== The site originally consisted of a pair of wooden telegraph poles (one for the transmitting aerials, one for the receiving aerials) erected on land that is itself about above sea level. The television broadcasts primarily covered the town of Machynlleth and the villages of the upper Dyfi river valley. 625-line colour TV came to the site in the late 1970s. A new self-supporting lattice mast was built to carry the UHF aerials but the original VHF TV and VHF radio services continued to use the site's original wooden poles. The three original VHF radio transmitters were upgraded to stereo in late Spring 1983.〔http://www.bbceng.info/Eng_Inf/EngInf_13.pdf〕 The 405-line VHF television service closed across the UK in 1985, but Machynlleth's 405 line services closed a year early - in January 1984. Machynlleth currently broadcasts digital television and analogue FM radio. 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「Machynlleth transmitting station」の詳細全文を読む スポンサード リンク
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