The Wrexham-Rhos transmitting station is a digital televisionrelay of Moel-y-Parc, and forms part of the Wales television region. Despite its name, the station is situated in Moss Village and serves the city of Wrexham, the northern area of Wrexham County Borough and south-western Flintshire. It is a free-standing lattice tower structure serving around 85,000 homes which are unable to receive broadcasts from Moel-y-Parc due to Hope Mountain.
Prior to analogue switch-off, Wrexham-Rhos broadcast four of the five national terrestrial stations. Channels 1 to 3 were broadcast at 200 W ERP, while S4C was broadcast at 400 W. In 1998, due to the upcoming launch of ONdigital from neighbouring transmission site, Winter Hill, S4C from the relay was required to change frequency (from UHF Channel 67) two years later. A message was displayed telling viewers to re-tune their televisions of the channel were carried for a couple of months. When the original frequency was switched off, the power on the newer version was increased.
At present, the station broadcasts three of the six national digital terrestrial television multiplexes on the "Freeview Lite" service. The station switched over to digital transmissions from analogue throughout November 2009, and remaining analogue services ceased at midnight on 25 November 2009. BBC A and Digital 3&4 broadcast using MPEG2 compression on DVB-T standards, whilst the HD multiplex, BBC B, uses DVB-T2.
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