The Abergavenny transmitting station was originally built by the IBA in 1969 as a relay for BBC and ITV VHF 405-line analogue television.

The band III VHF television feeds were provided off-air from St. Hilary and Wenvoe, both near Cardiff.

In 1973[1] the site was enhanced to transmit UHF analogue colour television.

The UHF television feed came via a two-hop route from Wenvoe, via the Ebbw Vale repeater.

Digital multiplexes took over their original frequencies at full power and in 64-QAM encoding mode from the start.