RTÉ take over the running of the Clarkstown Transmitter following demise of TEAMtalk 2004 - Official launch of RTÉ Radio 1 on Long Wave 252, January 2004 2004 - While the Tullamore transmitter was offline for maintenance Clarkstown provided Radio 1's AM service 2007 - Major upgrade of Transmitter 2007 - RTÉ run DRM tests, in parallel with Analogue AM service 2008 - 24 March, Closure of RTÉ Medium Wave service leaving 252 Long Wave as the only AM Broadcast by RTÉ, services which were on Medium Wave transferred to Long Wave. 2008 - 1 December, launch of RTÉ Radio 1 Extra which was extra content not broadcast on FM was now relayed on Long Wave 252 2014 - RTÉ announce plans to close Long Wave 252, September 2014 2014 - RTÉ announce postponement of closure plans until 2017 2017 - RTÉ announce postponement of closure plans until June 2019 2019 - Oireachtas Communications Committee announce the rebuilding of the antenna system and postponement of closure plans at least until 2021 Gallery See also List of tallest structures in the world List of tallest structures in Ireland References External links https://web.archive.org/web/20070929125352/http://tx.mb21.co.uk/features/252/summerhill.shtml – pictures from mb21 http://www.skyscraperpage.com/diagrams/?b45496 IAA information on the mast here (page 20). https://web.archive.org/web/20041113154742/http://members.lycos.co.uk/gregsradio/newpage0.html Buildings and structures in County Meath Radio masts and towers in Europe Mass media in the Republic of Ireland Transmitter sites in Ireland Towers completed in 1988 1988 establishments in Ireland