The Caerhendy television relay station was sited at Caerhendy in the Afan Valley, a few kilometres north of Junction 40 on the M4 motorway at Port Talbot. It was originally built in the 1980s as a fill-in relay for UHF analogue television. It was sited at the clubhouse of the football ground at Ynys Park and consisted of a mere 3 m aluminium mast carrying a vertically stacked yagi array. The transmitter served roughly 50 houses in Caerhendy, about 500 m across the valley to the east, which was unable to receive a signal from Mynydd Emroch transmitter just to the south.
Alltwen transmitter re-radiated a signal received off-air from Cwmafan about 2 km further to the northeast, itself a relay of Wenvoe. It was possibly the lowest ERP officially provided TV relay in the UK, radiating just 0.5 W on each of its four UHF channels.
When it arrived, the digital switchover process rendered Caerhendy redundant. It is no longer in service.
Channels listed by frequency
Analogue television
1980s - March 2010
FrequencyUHFkWService210.0005BBC One Wales240.0005ITV1 Wales270.0005BBC Two Wales310.0005S4C
References
External links The Transmission Gallery: Caerhendy UKFree: Caerhendy TV transmitter