Full Freeview on the Wenvoe (Cardiff, Wales) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 51.460,-3.282 or 51°27'35"N 3°16'57"W |  | CF5 6SA |
The symbol shows the location of the Wenvoe (Cardiff, Wales) transmitter which serves 360,000 homes. The bright green areas shown where the signal from this transmitter is strong, dark green areas are poorer signals. Those parts shown in yellow may have interference on the same frequency from other masts.
Are there any planned engineering works or unexpected transmitter faults on the Wenvoe (Cardiff, Wales) mast?
Wenvoe transmitter - Wenvoe transmitter: Possible effect on TV reception week commencing 11/11/2024 Pixelation or flickering on some or all channels 
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Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
DTG-12 QSPK 8K 3/4 8.0Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
Which Freeview channels does the Wenvoe transmitter broadcast?
If you have any kind of Freeview fault, follow this Freeview reset procedure first.Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
DTG-12 QSPK 8K 3/4 8.0Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
Which BBC and ITV regional news can I watch from the Wenvoe transmitter?
BBC Wales Today 1.2m homes 4.7%
from Cardiff CF5 2YQ, 6km northeast (42°)
to BBC Wales region - 206 masts.
ITV Cymru Wales 1.2m homes 4.7%
from Cardiff CF5 6XJ, 1km east-northeast (74°)
to ITV Wales region - 206 masts.
Are there any self-help relays?
| Abergwesyn | Active deflector | 7 km N Llanwrtyd Wells | 20 homes |
| Barry | Transposer | 10 km SW city centre | 300 homes |
| Celtic Manor | Transposer | 5 km E Newport | 80 homes |
| Pentrebach | Transposer | 3 km S Merthyr Tydfil | 100 homes |
| Ystradfellte | Active deflector | 30 km NE Port Talbot | 20 homes |
How will the Wenvoe (Cardiff, Wales) transmission frequencies change over time?
| 1950s-80s | 1984-97 | 1997-98 | 1998-2010 | 2010-13 | 2013-18 | 2013-17 | 15 May 2019 | ||
| VHF | B E T | B E T | B E T | B E T | B E K T | W T | W T | ||
| C5 | BBCtvwaves | ||||||||
| C30 | LOCAL2 | ||||||||
| C31 | com7 | com7 | |||||||
| C37 | com8 | com8 | |||||||
| C39 | +ArqB | +ArqB | ArqB | ||||||
| C41 | ITVwaves | ITVwaves | ITVwaves | +BBCA | +BBCA | +BBCA | BBCA | ||
| C42 | +SDN | +SDN | +SDN | SDN | |||||
| C44 | BBC1waves | BBC1waves | BBC1waves | D3+4 | D3+4 | D3+4 | D3+4 | ||
| C45 | +ArqA | +ArqA | +ArqA | ArqA | |||||
| C47 | C4waves | C4waves | C4waves | BBCB | BBCB | BBCB | BBCB | ||
| C49tv_off | +ArqB | ||||||||
| C51tv_off | BBC2waves | BBC2waves | BBC2waves | LCF | LCF | ||||
| C55tv_off | com7tv_off | ||||||||
| C56tv_off | COM8tv_off |
tv_off Being removed from Freeview (for 5G use) after November 2020 / June 2022 - more
Table shows multiplexes names see this article;
green background for transmission frequencies
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W T
waves denotes analogue; digital switchover was 3 Mar 10 and 31 Mar 10.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-4 | 500kW | |
| BBCA, D3+4, BBCB | (-7dB) 100kW | |
| com8 | (-9.7dB) 53.2kW | |
| SDN, ARQA, ARQB | (-10dB) 50kW | |
| com7 | (-10.3dB) 47kW | |
| Mux 1*, LCF | (-17dB) 10kW | |
| Mux 2*, Mux A*, Mux B*, Mux C*, Mux D* | (-20dB) 5kW |
Which companies have run the Channel 3 services in the Wenvoe transmitter area
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Saturday, 4 November 2023
S
Steve Donaldson4:30 PM
Tony1234: I am wondering whether something has changed along the signal path, within a short distance from your property.
You have said you can see the top of the mast but not the lower part. This terrain plot suggests that anything up to around mile out could be in the first Fresnel zone:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
There is the line-of-sight and the Fresnel zone, the area around the line-of-sight in which objects could "potentially" affect reception. This is indicated on the plot with the purple line, line-of-sight being the yellow line. So being able to see the transmitter isn't necessarily a guarantee of good reception. This isn't to say anything in the area "will" affect reception, just that it could potentially do.
With the plot we can see that up to around a mile out, the line-of-sight and first Fresnel are close to the ground and therefore anything on the ground could be in the Fresnel zone. Furthermore, the distance I have said is to around one mile out, this according to the plot. The plot samples ground heights at intervals and may therefore not be exactly accurate.
Additionally, I tried a few points along Trepit Road, finding that the terrain isn't flat and that the distance out from the location which the terrain may be within the Fresnel zone (i.e. line-of-sight close to the ground) varies.
With this in mind, I was wondering whether something has been built or changed somewhere along the line between you and the transmitter, up to about a mile, but in particular closer to you. I haven't been able to find anything definite. On looking at the satellite image, my eye was drawn to the houses on St. James Road as they appeared new, although examination of the local planning registry suggests to me that these may be in the region of five or so years old, the original planning application dated December 2014.
That said, particularly if you are to the north of Trepit Road then they do look to be on the signal path (the line between you and the transmitter). I can't help but wonder whether they could be causing some level of degradation in reception, being that they may be in the Fresnel zone for Dryslwyn House and neighbouring properties, particularly on that side of the road.
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Sunday, 5 November 2023
C
Chris.SE10:37 PM
Steve Donaldson:
Thanks for that excellent detailed analysis Steve. I was contemplating taking a closer look but thought I'd wait and see what Tony1234 said in response to my queries.
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Monday, 7 October 2024
Transmitter engineering
10:47 AM
10:47 AM
Wenvoe transmitter - Wenvoe transmitter: Possible effect on TV reception week commencing 07/10/2024 Pixelation or flickering on some or all channels [DUK]
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Monday, 14 October 2024
Transmitter engineering
5:11 AM
5:11 AM
Wenvoe transmitter - Wenvoe transmitter: Possible effect on TV reception week commencing 14/10/2024 Pixelation or flickering on some or all channels [DUK]
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Transmitter engineering
5:11 AM
5:11 AM
Wenvoe transmitter - Wenvoe transmitter: Possible effect on TV reception week commencing 14/10/2024 Pixelation or flickering on some or all channels [DUK]
| link to this comment |
Monday, 21 October 2024
Transmitter engineering
5:09 AM
5:09 AM
Wenvoe transmitter - Wenvoe transmitter: Possible effect on TV reception week commencing 21/10/2024 Pixelation or flickering on some or all channels [DUK]
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Monday, 28 October 2024
Transmitter engineering
10:48 AM
10:48 AM
Wenvoe transmitter - Wenvoe transmitter: Possible effect on TV reception week commencing 28/10/2024 Pixelation or flickering on some or all channels [DUK]
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Monday, 4 November 2024
Transmitter engineering
5:09 AM
5:09 AM
Wenvoe transmitter - Wenvoe transmitter: Possible effect on TV reception week commencing 04/11/2024 Pixelation or flickering on some or all channels [DUK]
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Monday, 11 November 2024
Transmitter engineering
10:48 AM
10:48 AM
Wenvoe transmitter - Wenvoe transmitter: Possible effect on TV reception week commencing 11/11/2024 Loss of Redundancy [DUK]
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Tuesday, 12 November 2024
Transmitter engineering
1:49 PM
1:49 PM
Wenvoe transmitter - Wenvoe transmitter: Possible effect on TV reception week commencing 11/11/2024 Pixelation or flickering on some or all channels [DUK]
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