  Efail Fach  Kilvey Hill | |
| Mast height | 15 metres (49 ft) |
|---|---|
| Coordinates | 51°38′54″N 3°45′19″W / 51.6483°N 3.7553°W |
| Grid reference | SS786958 |
| Built | 1980s |
| Relay of | Kilvey Hill |
| BBC region | BBC Wales |
| ITV region | ITV Cymru Wales |
The Efail Fach television relay station is sited on a hill west of the villages of Efail Fach, Cwm Pelenna and Tonmawr. It was originally built in the 1980s as a fill-in relay for UHF analogue colour television serving all of those settlements. It consists of a 15 m self-supporting lattice mast standing on a hill which is itself about 160 m above sea level. The transmissions are beamed to the east towards the Pelenna valley. The Efail Fach transmission station is owned and operated by Arqiva.
The "Transmission Gallery" site claims[1] that the Efail Fach transmitter re-radiates the signal received off-air from Cilfrew television relay station near Neath, itself a repeater of Kilvey Hill at Swansea. However, Efail Fach used the same frequencies as Cilfrew in the analogue TV days, and shares two frequencies with Cilfrew in the digital TV era.
OFCOM claims[2] that the site re-radiates Kilvey Hill directly. Efail Fach does indeed have a clear line-of-sight to Kilvey Hill (which is about 11.6 km away at a bearing of 259.5°).
When it came, the digital switchover process for Efail Fach duplicated the timing at the Kilvey Hill parent station, with the first stage taking place on Wednesday 12 August 2009 and the second stage was completed on Wednesday 9 September 2009, with the Kilvey Hill transmitter-group becoming the first in Wales to complete digital switchover. After the switchover process, analogue channels had ceased broadcasting permanently and the Freeview digital TV services were radiated at an ERP of 2 W each.[3]
Channels listed by frequency
Analogue television
1980s - 12 August 2009
Efail Fach (being in Wales) transmitted the S4C variant of Channel 4.
| Frequency | UHF | kW | Service |
|---|---|---|---|
| 615.25 MHz | 39 | 0.008 | BBC One Wales |
| 663.25 MHz | 45 | 0.008 | BBC Two Wales |
| 695.25 MHz | 49 | 0.008 | ITV1 Wales (HTV Wales until 2002) |
| 719.25 MHz | 52 | 0.008 | S4C |
Analogue and digital television
12 August 2009 - 9 September 2009
The UK's digital switchover commenced at Kilvey Hill (and therefore at Efail Fach and all its other relays) on 12 August 2009. Analogue BBC Two Wales on channel 45 was first to close, and ITV1 Wales was moved from channel 49 to channel 45 for its last month of service. Channel 49 was replaced by the new digital BBC A mux which started up in 64-QAM and at full power (i.e. 2 W).
| Frequency | UHF | kW | Service | System |
|---|---|---|---|---|
| 615.25 MHz | 39 | 0.008 | BBC One Wales | PAL System I |
| 663.25 MHz | 45 | 0.008 | ITV1 Wales | PAL System I |
| 698.000 MHz | 49 | 0.002 | BBC A | DVB-T |
| 719.25 MHz | 52 | 0.008 | S4C | PAL System I |
Digital television
9 September 2009 - present
The remaining analogue TV services were closed down and the digital multiplexes took over on the original analogue channels' frequencies.
| Frequency | UHF | kW | Operator |
|---|---|---|---|
| 666.000 MHz | 45 | 0.002 | Digital 3&4 |
| 698.000 MHz | 49 | 0.002 | BBC A |
| 722.000 MHz | 52 | 0.002 | BBC B |
13 March 2013
As a side-effect of frequency-changes elsewhere in the region to do with clearance of the 800 MHz band for 4G mobile phone use,[4] Efail Fach's "BBC B" multiplex will have to be moved from channel 49 to channel 39.[5]
| Frequency | UHF | kW | Operator |
|---|---|---|---|
| 618.000 MHz | 39 | 0.002 | BBC A |
| 666.000 MHz | 45 | 0.002 | Digital 3&4 |
| 722.000 MHz | 52 | 0.002 | BBC B |
References
- ^ "mb21 - The Transmission Gallery". Archived from the original on 2009-04-22.
- ^ http://www.digitaluk.co.uk/transmitternetwork/tools__and__resources/almanac/installer_newsletters_transmitter_groups2009_pdfs/Installer_Newsletter_Kilvey_Hill__1_month_out_FINAL_24_July_09.pdf[permanent dead link]
- ^ "Freeview on Efail Fach TV transmitter". ukfree.tv. Retrieved 2012-02-21.
- ^ "EU States Must Allow 4G on Analogue TV Spectrum". 15 February 2012.
- ^ "Digital UK confirms further Freeview 4G clearance retune dates for South Wales | a516digital". Archived from the original on 2016-03-04.
External links
Transmitter sites in Wales | |
|---|---|
| Transmitter stations | |
This page was last edited on 29 August 2023, at 23:37