Transmission station in Wales
The
Wenvoe transmitting station
, officially known as
Arqiva Wenvoe
, is the main facility for
broadcasting
and
telecommunications
for South Wales and the West Country. It is situated close to the village of
Wenvoe
in the
Vale of Glamorgan
,
Wales
, in the
UK
.
It comprises a 260.7-metre (855 ft)
[1]
[2]
[3]
guyed mast
with
antennas
attached at various heights.
[4]
The average height above sea level is 384 metres (1,260 ft) for the television antennas.
[4]
[2]
It is owned and operated by
Arqiva
. The site serves an estimated 1.5m listeners (0.63m households) in the South West of England, and 1.3m listeners (0.54m households) in Wales.
History
[
edit
]
The original 230 m (750 ft) mast at the site was built in 1952 by the BBC to provide
405-line
VHF
television to south Wales and the west of England. The station broadcast on
Band I
channel 5 (66.75 MHz) from 15 August 1952 using its reserve transmitters,
[5]
and from 20 December 1952 with its main high-power transmitters.
[6]
It remained on air until the closure of 405-line television in 1985.
In 1955
VHF
FM
radio was added to the mast, carrying the BBC's
Home Service
. This was followed by the addition of the
Light Programme
in 1956 and the
Third Programme
in 1959.
In 1963 a second 191 m (625 ft) mast was built alongside the existing structure. This was in order to carry the new BBC Wales 405-line TV service on
Band III
VHF channel 13 (214.75 MHz), and entered service on 9 February 1964.
[7]
The 405-line transmitter for this service was closed early, in 1983.
On 12 September 1965, a 625-line black and white television service
BBC2
became available from Wenvoe on
UHF
. This new transmitter was capable of colour broadcasting from the start and was used for unannounced colour TV engineering test-transmissions from that point onwards.
[8]
In September 1967 BBC2 officially launched a colour TV service from Wenvoe, a few months after BBC2 Crystal Palace and others had launched the UK's first colour broadcasting in July of that year.
In 1970
UHF
625-line colour television was introduced for
BBC1
and
ITV
Wales (
HTV Wales
.
S4C
was added later when it launched in 1982.
In 1985, when 405-line TV closed, the site was re-engineered and both of the existing masts were taken down. They were replaced by a brand new mast (to be known as Wenvoe "A"), which is the structure currently in place at the site. Wenvoe "B" is a self-supporting telecommunications mast nearby. The VHF FM antennas were upgraded from the old horizontally polarised slot antennas to new mixed polarisation antennas, and the transmitter power was doubled.
The new analogue
Channel 5
was launched in 1997, but this was never transmitted from Wenvoe. It was presumably thought that the 125 kW transmitter at
Mendip
would serve a satisfactory number of homes in Wenvoe's service area. At the time, many homes within range of Mendip already had aerials pointing at it so as to receive the English-only
Channel 4
rather than the bilingual English/Welsh
S4C
transmitted from Wenvoe.
Work began on a new temporary 217.7 m (714 ft) stayed mast (Wenvoe "C") on 14 June 2006 and it was completed in September 2006. This carried the analogue signals whilst Wenvoe "A" was to be structurally improved and extended by 23 metres (75 ft). Wenvoe "A" was fitted with a new high-power digital antenna and a full reserve antenna. New high-power digital TV transmitters were installed in the buildings, which would allow Wenvoe "A" to broadcast all six main digital TV multiplexes, as well as a seventh currently proposed by OFCOM
[9]
after the analogue signals were switched off in 2010.
This mechanical upgrade was completed by the summer of 2009 and Wenvoe "C" was dismantled starting in late August 2009.
Wenvoe's analogue BBC Two service was switched off on 3 March 2010 and the remaining analogue TV services were switched off on 31 March 2010. At this point, Wales had officially completed its switchover to digital TV services.
[10]
BBC Radio Wales
commenced broadcasting from the Wenvoe Transmitter on 6 December 2011 at 10:39. This replaced the low power VHF Transmitter on the
Wenallt Hill
which also carried BBC Wales VHF programme on 103.9 MHz to South East Wales up to that point.
Services listed by frequency
[
edit
]
Analogue television
[
edit
]
15 August 1952 - 9 February 1964
[
edit
]
9 February 1964 - 12 September 1965
[
edit
]
The second mast came into service carrying the BBC Wales service.
12 September 1965 - April 1970
[
edit
]
The first UHF 625-line television service started from Wenvoe. This required the installation of a Band V antenna at the top of the mast,
[11]
replacing the 1952 Band I antenna that had originally been sited there. The new Band I antenna was brought into service on 8 December 1964, and was sited immediately below the Band V antenna and above the Band II antenna. This put it in close proximity with the fixings of the top deck of guy wires, requiring some careful engineering so as not to affect the radiation pattern adversely.
[12]
† Monochrome initially, colour TV service started September 1967.
April 1970 - 1 November 1982
[
edit
]
† Monochrome initially, colour production at BBC One Wales started 9 July 1970.
1 November 1982 - 4 January 1983
[
edit
]
Channel Four launched across the UK. Being in Wales, Wenvoe transmitted the S4C variant.
4 January 1983 - 3 January 1985
[
edit
]
The 405-line BBC1 Wales service on Band III from Wenvoe was discontinued early.
[13]
The off-air 405-line relays at
Abergavenny
,
Carmarthen
and
Llanelli
had been decommissioned the previous year. This left
Llandrindod Wells
(and Wenvoe's indirect off-air relay at
Llanidloes
) and
Kilvey Hill
as the last surviving 405-line BBC Wales transmitters classed as relays of Wenvoe.
405-line transmissions from Kilvey Hill and Llanidloes were due to shut in the second quarter of 1983, leaving Llandrindod Wells to continue alone until January 1985.
3 January 1985 - 15 November 1998
[
edit
]
The 405-line VHF television system was shut down across the whole UK, and until the start of digital television services, Wenvoe's TV output was 625-lines on UHF only.
Analogue and digital television
[
edit
]
15 November 1998 - 3 March 2010
[
edit
]
This was the initial roll-out for digital television using the
DVB-T
system. The transmitter frequencies and power outputs were chosen not to interfere with the UHF TV channels, but to be received with the same aerial-group. The QAM constellations and number of carriers were changed around 2002 after the collapse of
ITV Digital
as the service was taken over by the
Freeview
consortium.
3 March 2010 ? 31 March 2010
[
edit
]
Analogue
BBC Two Wales
on channel 51 closed after 45 years of service, and
HTV Wales
was moved from channel 41 to that channel for what would be its final month of service.
Multiplex 1 from channel 30 was renamed BBC A and moved to channel 41+ (which had just been vacated by analogue HTV Wales). In addition to the power increase to 100 kW ERP, it was reconfigured to 64QAM and 8k carriers, which resulted in a service area similar to the old analogue transmissions but with much more bandwidth available than Multiplex 1 ever had.
For the duration of the switchover, all the channels carried on Multiplex B were duplicated on this new PSB1 multiplex.
Channel 30 was re-used for Multiplex C, freeing Multiplex C's old allocation at channel 43-
Digital television
[
edit
]
31 March 2010 - 27 April 2011
[
edit
]
All remaining analogue television was shut down after 40 years of service. The pre-switchover low-power digital transmissions (apart from Arqiva A and SDN) were upgraded to full power and configured to 64QAM and 8k carriers, with frequency changes and with new names for the multiplexes:
† High-definition channels; BBC One HD, BBC HD, ITV1 HD and S4C Clirlun using DVB-T2 transmission, coded with MPEG4 100 kW ERP.
27 April 2011 - 23 January 2013
[
edit
]
Unusually, the digital switchover at Wenvoe required a third phase to allow time for channels 42 and 45 to be cleared at
Ridge Hill
. At this point, Arq A and SDN were shifted fully into the group with a power increase:
23 January 2013 - 10 December 2013
[
edit
]
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,
[15]
Wenvoe's "Arqiva B" multiplex was moved from channel 49 to channel 39.
[16]
This was to allow channel 49 to be taken over at a future date by the
Mendip
transmitter.
Frequency
|
UHF
|
kW
|
Operator
|
618.000
MHz
|
39
|
50
|
Arqiva B
|
634.166
MHz
|
41+
|
100
|
BBC A
|
642.166
MHz
|
42+
|
50
|
SDN
|
658.000
MHz
|
44
|
100
|
Digital 3&4
|
666.000
MHz
|
45
|
50
|
Arqiva A
|
682.000
MHz
|
47
|
100
|
BBC B
|
10 December 2013 - 24 June 2020
[
edit
]
Following changes in the 700 MHz Band on 15 May and 6 June 2019, the Arqiva COM7 multiplex is transmitted on UHF Channel 55 and the COM8 multiplex is on UHF Channel 56. These multiplexes carry additional HD services. The Local TV Multiplex is on UHF Channel 37 and commenced antenna tests around 1 December 2013.
Frequency
|
UHF
|
kW
|
Operator
|
System
|
602.000
MHz
|
37
|
10
|
Local TV
|
DVB-T
|
618.000
MHz
|
39
|
50
|
Arqiva
B
|
DVB-T
|
634.166
MHz
|
41+
|
100
|
BBC
A
|
DVB-T
|
642.166
MHz
|
42+
|
50
|
SDN
|
DVB-T
|
658.000
MHz
|
44
|
100
|
Digital 3&4
|
DVB-T
|
666.000
MHz
|
45
|
50
|
Arqiva A
|
DVB-T
|
682.000
MHz
|
47
|
100
|
BBC B
|
DVB-T2
|
746.000
MHz
|
55
|
40.7
|
COM7
|
DVB-T2
|
754.000
MHz
|
56
|
40.7
|
COM8
|
DVB-T2
|
25 June 2020 - present
[
edit
]
Following changes in the 700 MHz Band, on 22 June 2020, the Arqiva COM8 multiplex was switched off permanently on UHF Channel 56.
[17]
Frequency
|
UHF
|
kW
|
Operator
|
System
|
602.000
MHz
|
37
|
10
|
Local TV
|
DVB-T
|
618.000
MHz
|
39
|
50
|
Arqiva
B
|
DVB-T
|
634.166
MHz
|
41+
|
100
|
BBC
A
|
DVB-T
|
642.166
MHz
|
42+
|
50
|
SDN
|
DVB-T
|
658.000
MHz
|
44
|
100
|
Digital 3&4
|
DVB-T
|
666.000
MHz
|
45
|
50
|
Arqiva A
|
DVB-T
|
682.000
MHz
|
47
|
100
|
BBC B
|
DVB-T2
|
746.000
MHz
|
55
|
40.7
|
COM7
|
DVB-T2
|
Analogue radio (VHF FM)
[
edit
]
1956 - Winter 1981
[18]
[
edit
]
Wenvoe used a rather erratic set of frequencies at the start, bandplan changes agreed in 1978 were brought into play in 1981.
Present
[
edit
]
BBC Radio 1, BBC Radio 2, BBC Radio 3, BBC Radio 4 and Classic FM broadcasts from Wenvoe are intended to be for South Wales and the West Country, though the signal reaches much further due to the high ERP and use of omni-directional antenna systems.
Radio Cymru and Radio Wales have the same radiation pattern but different effective radiated powers. Radio Wales has a lower ERP to prevent it interfering with
BBC Radio Cornwall
on the same frequency. There is overspill allowing stereo listening for R. Wales & R. Cymru in the West Country.
Nation Radio is broadcast at low power to ensure sufficient penetration of Cardiff, Newport and Bridgend. There is some overspill into Bristol and the West Country, though service quickly drops off after Bristol.
Digital Radio (DAB)
[
edit
]
Digital Radio is transmitted from Wenvoe at high power and is designed to cover South Wales and the West Country.
See also
[
edit
]
References
[
edit
]
External links
[
edit
]
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Italics
denotes a transmitter no longer used for transmitting television signals
|
Wenvoe
VHF 405-line Transmitter Group
|
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Wales Transmitter group
| |
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West Transmitter group
|
- Barnstaple
- Bath
- Marlborough
- Swindon
|
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Wenvoe
UHF 625-line Transmitter Group
|
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Transmitter stations
|
- Aberbeeg
- Abercynon
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- Abergavenny
- Abertillery
- Abertridwr
- Alltwen
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- Bedlinog
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- Gilfach
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- Machen Upper
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- Monmouth
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- Neath Abbey (H)
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- Ogmore Vale
- Pennar
- Pennorth
- Penrhiwceiber
- Pontardawe
- Pontypool
- Pontypridd
- Porth
- Rhondda A
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- Rhondda Fach
- Rhymney
- Risca
- Sennybridge
- South Maesteg
- South Tredegar
- Taffs Well
- Ton Pentre
- Tonypandy
- Tonyrefail
- Trebanog
- Trecastle
- Trefechan
- Treharris
- Tynewydd
- Upper Killay
- Usk
- Van Terrace
- Wattsville
- Ynys Owen
|
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Wenvoe
UHF DVB Transmitter Group
|
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Transmitter stations
|
- Aberbeeg
- Abercynon
- Aberdare
- Abergavenny
- Abertillery
- Abertridwr
- Bargoed
- Bedlinog
- Blackmill
- Blaenau Gwent
- Blaenavon
- Blaenllechau
- Blaina
- Brecon
- Chepstow
- Clydach
- Clyro
- Crickhowell
- Crucorney
- Crumlin
- Cwm Ffrwd-Oer
- Cwmafon
- Cwmaman
- Cwmfelinfach
- Deri
- Dowlais
- Ebbw Vale
- Ebbw Vale South
- Ferndale
- Fernhill
- Gelli-fendigaid
- Gilfach
- Llanfach
- Llanfoist
- Llangeinor
- Llanharan
- Llanhilleth
- Llyswen
- Machen Upper
- Maesteg
- Merthyr Tydfil
- Monmouth
- Mynydd Bach
- Mynydd Machen
- Nant-y-Moel
- Nantyglo
- Ogmore Vale
- Pennar
- Pennorth
- Penrhiwceiber
- Pontypool
- Pontypridd
- Porth
- Rhondda Fach
- Rhondda (H)
- Rhondda (V)
- Rhymney
- Risca
- Sennybridge
- South Maesteg
- South Tredegar
- Taffs Well
- Ton Pentre
- Tonypandy
- Tonyrefail
- Trebanog
- Trecastle
- Trefechan
- Treharris
- Tynewydd
- Upper Killay
- Usk
- Van Terrace
- Wattsville
- Ynys Owen
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