The Carmarthen transmitting station (Welsh: Gorsaf drosglwyddo Caerfyrddin) was originally built by the BBC in 1964/65 as a relay for VHF radio and television.

[1] The site was built on a 135 m ridge to the north of Carmarthen itself, and entered service on 15 March 1965.

UHF 625-line colour television was never radiated from this site: the main transmitter at Carmel (20 km to the east) provided that service to the town from 1973 when it opened.

According to the BBC's R&D report,[1] the original frequencies for the FM radio services were as shown below.

Radio 1 was given its own frequency as more of Band II became available for broadcasting after the bandplan changes of 1988.