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Full Freeview on the Wenvoe (Cardiff, Wales) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps51.460,-3.282 or 51°27'35"N 3°16'57"Wsa_postcodeCF5 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 04/12/2023 Pixelation or flickering on some or all channels Digital tick

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name

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.

 H max
C41+ (634.2MHz)384mDTG-100,000W
Channel icons
1 BBC One (SD) Wales, 2 BBC Two Wales, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, plus 14 others

 H max
C44 (658.0MHz)384mDTG-100,000W
Channel icons
5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 26 ITV4, 28 ITVBe, 30 E4 +1, 35 ITV1 +1 (Wales),

 H max
C47 (682.0MHz)384mDTG-100,000W
Channel icons
46 5SELECT, 101 BBC One HD Wales, 102 BBC Two HD Wales, 104 Channel 4 HD South ads, 105 Channel 5 HD, 106 BBC Four HD, 110 Channel 4 HD (Wales), 204 CBBC HD, 205 CBeebies HD, plus 1 others

 H -3dB
C42+ (642.2MHz)384mDTG-850,000W
Channel icons
 E4 (Wales), 20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 38 Channel 5 +1, 41 Legend, 57 Dave ja vu, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 91 WildEarth, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 267 Al Jazeera English, plus 34 others

 H -3dB
C45+ (666.2MHz)384mDTG-850,000W
Channel icons
 Smithsonian Channel, 11 Sky Mix, 17 Really, 19 Dave, 31 E4 Extra, 36 Sky Arts, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 Drama +1, 65 That's Christmas, 70 Quest +1, 74 Yesterday +1, 75 That's 90s, 233 Sky News, plus 11 others

 H -3dB
C39+ (618.2MHz)384mDTG-850,000W
Channel icons
 Quest Red +1,  Classic Hits, 12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! christmas, 56 That's TV (UK), 61 GREAT! movies extra, 63 GREAT! christmas mix, 71 That’s 60s, 73 HobbyMaker, 82 Talking Pictures TV, 83 Together TV, 84 PBS America, 235 Al Jazeera Eng, plus 20 others

 H -10dB
C37 (602.0MHz)384mDTG-1210,000W
Channel icons
from 22nd September 2014: 8 Made in Cardiff,

DTG-8 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?

regional news image
BBC Wales Today 1.2m homes 4.7%
from Cardiff CF5 2YQ, 6km northeast (42°)
to BBC Wales region - 206 masts.
regional news image
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?

AbergwesynActive deflector7 km N Llanwrtyd Wells20 homes
BarryTransposer10 km SW city centre300 homes
Celtic ManorTransposer5 km E Newport80 homes
PentrebachTransposer3 km S Merthyr Tydfil100 homes
YstradfellteActive deflector30 km NE Port Talbot20 homes

How will the Wenvoe (Cardiff, Wales) transmission frequencies change over time?

1950s-80s1984-971997-981998-20102010-132013-182013-1715 May 2019
C39 +ArqB+ArqBArqB

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

Jan 1958-Jul 1968Television Wales and the West
Jul 1968-Feb 2004Harlech Television
Feb 2004-Dec 2014ITV plc
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Wenvoe was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Tuesday, 9 April 2013
Dave Lindsay

4:00 PM

Alex Theo: I doubt you will receive from Mendip (although, as I say, I'm not a professional). See this terrain plot from you to Mendip:

Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location

The high ground about 2 miles away from you is Graig Llanishen and it is about 200m above your ground level. A look at the predicted coverage map on this site suggests that up until that point reception from Mendip may be possible.

The gentleman in Bedwas lives on the north side of the valley. That is the side of the valley that faces Mendip, even if it can't quite be 'seen' at his location.

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Dave Lindsay's 5,724 posts GB flag
Dave Lindsay

4:02 PM

Alex Theo: I should point out that the coverage maps are a rough guide and should not be interpretted as being indications of where reception will definately or will not definately be possible.

They indicate where the signal is expected to be at a particular level and a particular height above ground.

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Dave Lindsay's 5,724 posts GB flag
Alex Theo
4:09 PM

Dave Lindsay: Thanks again for your help Dave. I may give Mendip a try anyhow but failing that I will probably look to freesat as an alternative. Not something I wanted to do but may be no other choice.

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Alex Theo's 4 posts GB flag
Alex's: mapA's Freeview map terrainA's terrain plot wavesA's frequency data A's Freeview Detailed Coverage
Dave Lindsay

4:26 PM

Alex Theo: My apologies. Van Terrace is horizontally polarised as the photo of it shows (the two horizontally polarised logs at the top):

mb21 - The Transmission Gallery

Digital UK Coverage Checker also says that it is horizontally polarised.

It's certainly the case that at Bedwas, Van Terrace is on a close bearing to Wenvoe.

However, this terrain plot from you to Van Terrace suggests that the ground around where the interchange is is perhaps 30m or more above where your aerial will be:

Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location

Also note Van Terrace's "dickie bow" shaped radiation pattern, so the full force of the 2W isn't being beamed in your direction.

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Dave Lindsay's 5,724 posts GB flag
Monday, 29 April 2013
3:22 PM

Hi. I am looking to install a new aerial at my property, but would rather connect to Wenvoe as opposed to Llanharan.

Looking at the terrain between the property and the transmitter am I likely to get a decent enough signal?

Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location

Thanks for the help

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CCob's 3 posts GB flag
Dave Lindsay

3:33 PM

CCob: The only exact answer is to try it out.

However (I speak as someone who isn't an aerial installer) it would seem not too bad. Digital UK suggests you might be in with a shot and Streetview shows aerials pointing to Wenvoe (have you looked around at neighbours' houses?).

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Dave Lindsay's 5,724 posts GB flag
3:39 PM

Dave Lindsay: I'll take a look at neighbours houses later when I get home.

I Didn't want to splash out on the correct B type antenna for Wenvoe as Llanharan uses the A frequencies. Would a simple indoor aerial work for the test?


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CCob's 3 posts GB flag
Dave Lindsay

4:17 PM

CCob: You can always try it and see what you get. As I say, I'm not a professional so wouldn't want to go too far as I don't have experience.

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Dave Lindsay's 5,724 posts GB flag

9:31 PM

CCob: Whether a simple indoor aerial would be OK for a test or not is dependant on if it can be tried out along with a TV in an upstairs location, and if it can then to aid aerial positioning go into your TV or boxes "manual" tuning menu and enter Wenvoe's BBC on mux Ch41 but do NOT press search or scan, because if any signal is being received it should be shown on the strength / quality indicator after you entered Ch41.

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jb38's 7,179 posts GB flag
Tuesday, 30 April 2013
9:43 AM

jb38: Trying it up stairs shouldn't be an problem, In fact I can probably get up the attic where all the coax cable is coiled up ready for the aerial and attach it directly to one of them.

Dave Lindsay: Checked some of the neighbours houses, some appear to be pointing at Wenvoe the others at Llanharan, so it looks like I could be in with a shot.

Thanks both for your help

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CCob's 3 posts GB flag
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