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10mmsocket
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remove original research / analysis based on tx.mb21.co.uk which is a personal website WP:SPS not a reliable source WP:RS
[td]Originally, the site had a guyed 65 m lattice mast erected on land that is itself about 440 m above sea level. Unusually for the era, when 405-line Independent Television came to the area in 1969, the ITV transmissions were hosted on the same mast as the BBC ones.{{citation needed|date=December 2019}}[/td] [td][/td]
[td][/td] [td]UHF television was added to the site in late 1975,<ref>{{cite web |url=http://txlib.mb21.co.uk/main.php?g2_itemId=2209&g2_imageViewsIndex=3 |title=Welcome to the Gallery Upgrader |publisher=Txlib.mb21.co.uk |date= |accessdate=2013-05-28 |archive-date=31 May 2014 |archive-url=https://web.archive.org/web/2014053.../main.php?g2_itemId=2209&g2_imageViewsIndex=3 |url-status=dead }}</ref> launching with just the three programme services that were active at the time. S4C was added in 1982 when it launched.{{citation needed|date=December 2019}}[/td]
[td]UHF television was added to the site in late 1975,{{cn|date=September 2025}} launching with just the three programme services that were active at the time. S4C was added in 1982 when it launched.{{citation needed|date=December 2019}}[/td] [td][/td]
[td][/td] [td]405-line television from this site was shut down in January 1985.<ref>{{cite web|url=http://www.pembers.freeserve.co.uk/405-Lines/Transmitters.gif |title=Archived copy |accessdate=2013-11-15 |url-status=dead |archiveurl=https://web.archive.org/web/2012081...rs.freeserve.co.uk/405-Lines/Transmitters.gif |archivedate=2012-08-13 }}</ref>[/td]
[td]405-line television from this site was shut down in January 1985.<ref>{{cite web|url=http://www.pembers.freeserve.co.uk/405-Lines/Transmitters.gif |title=Archived copy |accessdate=2013-11-15 |url-status=dead |archiveurl=https://web.archive.org/web/2012081...rs.freeserve.co.uk/405-Lines/Transmitters.gif |archivedate=2012-08-13 }}</ref>[/td] [td]====4 July 1969 - Late 1975====[/td]
[td]====4 July 1969 - Late 1975====[/td] [td]When ITV 405-line television commenced, the site additionally became an indirect off-air relay of [[Preseli transmitting station|Preseli]] about 90 km to the west. Available documentation does not state how the signal from Preseli was routed to Llandrindod Wells. There is a 30 km long stretch of high ground (the southern Cambrian hills) obstructing the direct signal from Preseli starting about 10 km to the west. However, the 100 W off-air relay at [[Llandovery transmitting station|Llandovery]] is line-of-sight about 30 km away on a bearing of 218Β°.[/td]
[td]When ITV 405-line television commenced, the site additionally became an indirect off-air relay of [[Preseli transmitting station|Preseli]] about 90 km to the west. Available documentation does not state how the signal from Preseli was routed to Llandrindod Wells. There is a 30 km long stretch of high ground (the southern Cambrian hills) obstructing the direct signal from Preseli starting about 10 km to the west. However, the 100 W off-air relay at [[Llandovery transmitting station|Llandovery]] is line-of-sight about 30 km away on a bearing of 218Β°.[/td] [td][/td] [td]Llandovery relay had been built a year earlier in 1968, and as can be deduced from the geometry of MB21's photos,<ref>{{cite web|url=http://tx.mb21.co.uk/gallery/gallerypage.php?txid=790&pageid=1092 |title=mb21 - The Transmission Gallery |publisher=Tx.mb21.co.uk |date=2012-02-07 |accessdate=2013-05-28}}</ref> it was indeed chosen for the signal source. Eight yagi aerials (four in use, four as reserves) were needed to pick up a reliable signal off-air.[/td] [td][/td]
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[td][/td] [td]==External links==[/td]
[td]==External links==[/td] [td]* [http://tx.mb21.co.uk/info/405/bbc/#bbc_wales MB21's page on BBC 405 TV to Wales and the West][/td] [td]* [http://www.bvws.org.uk/405alive/info/tx_list.html "405 Alive's list of transmitters"][/td]
[td]* [http://www.bvws.org.uk/405alive/info/tx_list.html "405 Alive's list of transmitters"][/td] [td]* [https://web.archive.org/web/2012041...reeserve.co.uk/405-Lines/tx-list.html#BBC#BBC More details on 405-line BBC transmitters][/td]
[td]* [https://web.archive.org/web/2012041...reeserve.co.uk/405-Lines/tx-list.html#BBC#BBC More details on 405-line BBC transmitters][/td] [td]* [http://tx.mb21.co.uk/gallery/llandrindod-wells.php The Transmission Gallery: Photographs and Information][/td] [td]* [http://www.ukfree.tv/shutdowndetail.php?tx=SO018635 The 'ukfree' listing for Llandrindod Wells][/td]
[td]* [http://www.ukfree.tv/shutdowndetail.php?tx=SO018635 The 'ukfree' listing for Llandrindod Wells][/td] [td][/td]
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[td]Originally, the site had a guyed 65 m lattice mast erected on land that is itself about 440 m above sea level. Unusually for the era, when 405-line Independent Television came to the area in 1969, the ITV transmissions were hosted on the same mast as the BBC ones.{{citation needed|date=December 2019}}[/td]Revision as of 08:14, 2 September 2025
[/td][td]Originally, the site had a guyed 65 m lattice mast erected on land that is itself about 440 m above sea level. Unusually for the era, when 405-line Independent Television came to the area in 1969, the ITV transmissions were hosted on the same mast as the BBC ones.{{citation needed|date=December 2019}}[/td] [td][/td]
[td][/td] [td]UHF television was added to the site in late 1975,<ref>{{cite web |url=http://txlib.mb21.co.uk/main.php?g2_itemId=2209&g2_imageViewsIndex=3 |title=Welcome to the Gallery Upgrader |publisher=Txlib.mb21.co.uk |date= |accessdate=2013-05-28 |archive-date=31 May 2014 |archive-url=https://web.archive.org/web/2014053.../main.php?g2_itemId=2209&g2_imageViewsIndex=3 |url-status=dead }}</ref> launching with just the three programme services that were active at the time. S4C was added in 1982 when it launched.{{citation needed|date=December 2019}}[/td]
[td]UHF television was added to the site in late 1975,{{cn|date=September 2025}} launching with just the three programme services that were active at the time. S4C was added in 1982 when it launched.{{citation needed|date=December 2019}}[/td] [td][/td]
[td][/td] [td]405-line television from this site was shut down in January 1985.<ref>{{cite web|url=http://www.pembers.freeserve.co.uk/405-Lines/Transmitters.gif |title=Archived copy |accessdate=2013-11-15 |url-status=dead |archiveurl=https://web.archive.org/web/2012081...rs.freeserve.co.uk/405-Lines/Transmitters.gif |archivedate=2012-08-13 }}</ref>[/td]
[td]405-line television from this site was shut down in January 1985.<ref>{{cite web|url=http://www.pembers.freeserve.co.uk/405-Lines/Transmitters.gif |title=Archived copy |accessdate=2013-11-15 |url-status=dead |archiveurl=https://web.archive.org/web/2012081...rs.freeserve.co.uk/405-Lines/Transmitters.gif |archivedate=2012-08-13 }}</ref>[/td] [td]====4 July 1969 - Late 1975====[/td]
[td]====4 July 1969 - Late 1975====[/td] [td]When ITV 405-line television commenced, the site additionally became an indirect off-air relay of [[Preseli transmitting station|Preseli]] about 90 km to the west. Available documentation does not state how the signal from Preseli was routed to Llandrindod Wells. There is a 30 km long stretch of high ground (the southern Cambrian hills) obstructing the direct signal from Preseli starting about 10 km to the west. However, the 100 W off-air relay at [[Llandovery transmitting station|Llandovery]] is line-of-sight about 30 km away on a bearing of 218Β°.[/td]
[td]When ITV 405-line television commenced, the site additionally became an indirect off-air relay of [[Preseli transmitting station|Preseli]] about 90 km to the west. Available documentation does not state how the signal from Preseli was routed to Llandrindod Wells. There is a 30 km long stretch of high ground (the southern Cambrian hills) obstructing the direct signal from Preseli starting about 10 km to the west. However, the 100 W off-air relay at [[Llandovery transmitting station|Llandovery]] is line-of-sight about 30 km away on a bearing of 218Β°.[/td] [td][/td] [td]Llandovery relay had been built a year earlier in 1968, and as can be deduced from the geometry of MB21's photos,<ref>{{cite web|url=http://tx.mb21.co.uk/gallery/gallerypage.php?txid=790&pageid=1092 |title=mb21 - The Transmission Gallery |publisher=Tx.mb21.co.uk |date=2012-02-07 |accessdate=2013-05-28}}</ref> it was indeed chosen for the signal source. Eight yagi aerials (four in use, four as reserves) were needed to pick up a reliable signal off-air.[/td] [td][/td]
[td][/td] [td]{| class="wikitable sortable"[/td]
[td]{| class="wikitable sortable"[/td] [td][/td]
[td][/td] [td]==External links==[/td]
[td]==External links==[/td] [td]* [http://tx.mb21.co.uk/info/405/bbc/#bbc_wales MB21's page on BBC 405 TV to Wales and the West][/td] [td]* [http://www.bvws.org.uk/405alive/info/tx_list.html "405 Alive's list of transmitters"][/td]
[td]* [http://www.bvws.org.uk/405alive/info/tx_list.html "405 Alive's list of transmitters"][/td] [td]* [https://web.archive.org/web/2012041...reeserve.co.uk/405-Lines/tx-list.html#BBC#BBC More details on 405-line BBC transmitters][/td]
[td]* [https://web.archive.org/web/2012041...reeserve.co.uk/405-Lines/tx-list.html#BBC#BBC More details on 405-line BBC transmitters][/td] [td]* [http://tx.mb21.co.uk/gallery/llandrindod-wells.php The Transmission Gallery: Photographs and Information][/td] [td]* [http://www.ukfree.tv/shutdowndetail.php?tx=SO018635 The 'ukfree' listing for Llandrindod Wells][/td]
[td]* [http://www.ukfree.tv/shutdowndetail.php?tx=SO018635 The 'ukfree' listing for Llandrindod Wells][/td] [td][/td]
[td][/td]
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