It was originally built in 1983 as a fill-in relay for UHF analogue colour television covering the communities of Cwmgors, Gwaun Cae Gurwen and Tairgwaith.

It consists of a 25 m self-supporting lattice steel mast standing on a hillside which is itself about 180 m above sea level.

Cwmgors transmitter re-radiates the signal received off-air from Carmel about 25 km to the west.

After the switchover process, analogue channels had ceased broadcasting permanently and the Freeview digital TV services were radiated at an ERP of 5.2 W each.

The UK's digital switchover commenced at Carmel (and therefore at Cwmgors and all its other relays) on 26 August 2009.