The Carmarthen transmitting station ( cy, Gorsaf drosglwyddo Caerfyrddin) was originally built by the

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in 1964/65 as a relay for

VHF Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF ...

radio and television. The site was built on a 135 m ridge to the north of

Carmarthen Carmarthen (, RP: ; cy, Caerfyrddin , "Merlin's fort" or "Sea-town fort") is the county town of Carmarthenshire and a community in Wales, lying on the River Towy. north of its estuary in Carmarthen Bay. The population was 14,185 in 2011, ...

itself, and entered service on 15 March 1965. The transmission station is now owned and operated by

Arqiva Arqiva () is a British telecommunications company which provides infrastructure, broadcast transmission and smart meter facilities in the United Kingdom. The company is headquartered at the former Independent Broadcasting Authority headquarters ...

. UHF 625-line colour television was never radiated from this site: the main transmitter at

Carmel Carmel may refer to: * Carmel (biblical settlement), an ancient Israelite town in Judea * Mount Carmel, a coastal mountain range in Israel overlooking the Mediterranean Sea * Carmelites, a Roman Catholic mendicant religious order Carmel may also ...

(20 km to the east) provided that service to the town from 1973 when it opened. The 405-line VHF television service closed across the UK in 1985, but according to the BBC's transmitter list and the BBC's internal "Eng. Inf." magazine, Carmarthen was due to close early - in the first quarter of 1982. From that point onwards the site just relayed FM radio until 6 June 2011 when a single multiplex of DAB radio was added.

Channels listed by frequency

Analogue television

15 March 1965 - First Quarter 1982

The site provided BBC 405-line VHF television to the towns of Carmarthen and

Abergwili Abergwili () is a village and community in Carmarthenshire, Wales, near the confluence of the rivers Towy and Gwili, close to the town of Carmarthen. It is also an electoral ward. The community includes the settlements of Peniel, Llanfihangel- ...

which, being sited in a river estuary, could not reliably receive a signal from Wenvoe, 85 km to the east.

Analogue radio (VHF FM)

15 March 1965 - January 1973

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

January 1973 - May 1978

The three original radio services were still on their original frequencies as late as January 1973, but ERPs had been slightly increased to 10 W per channel by then. By May 1978 all three transmission frequencies had been moved by 400 kHz and all three were transmitting in stereo by that time. † Radio 4 was replaced by

BBC Radio Cymru BBC Radio Cymru is a Welsh language radio network owned and operated by BBC Cymru Wales, a division of the BBC. It broadcasts on two stations across Wales on FM, DAB, digital TV and online. The main network broadcasts for hours a day from ...

when it launched in January 1977.

May 1978 - Late 1980s

The new

frequency plan A frequency plan, bandplan, band plan or wavelength plan is a plan for using a particular band of radio frequencies, that are a portion of the electromagnetic spectrum. Each frequency plan defines the frequency range to be included, how channels a ...

continued unchanged until Radio 1 gained its own frequency.

Late 1980s - present

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

Digital radio (DAB)

6 June 2011 - present

References

External links

MB21's page on BBC 405 TV to Wales and the West

The Transmission Gallery: Carmarthen

UKFree's listing for the current radio services
{{Wenvoe VHF 405-line Transmitter Group Transmitter sites in Wales Wenvoe VHF 405-line Transmitter Group