It was originally built by the BBC,[1] entering service just before Christmas 1967 acting as a relay transmitter for the now-defunct 405-line VHF television system.

The television broadcasts primarily cover the towns of Dolgellau, Llanelltyd and the villages of the upper Mawddach river valley.

Colour TV eventually arrived, with the site now additionally acting as an indirect relay of Preseli (about 100 km to the south) for the 625-line services, receiving its signal off-air from Llwyn Onn, which receives its signal off-air from Preseli itself.

Mux A started up on the newly vacated channel 59 at full post-DSO power.

All the remaining analogue TV transmitters were shut down and the three multiplexes of Freeview Lite took over their frequencies.