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Freeview Light on the Cefn Mawr A (Denbighshire, Wales) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps52.961,-3.093 or 52°57'38"N 3°5'34"Wsa_postcodeLL20 7RT


The symbol shows the location of the Cefn Mawr A (Denbighshire, Wales) transmitter which serves less than 500 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.

This transmitter has no current reported problems

The BBC and Digital UK report there are no faults or engineering work on the Cefn Mawr A (Denbighshire, Wales) transmitter.

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

Which Freeview channels does the Cefn Mawr A 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.

 V max
C57 (762.0MHz)245mDTG-350W
Channel icons
2 BBC Two Wales, 9 BBC Four, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 601 BBC RB 1, plus 9 others

 V max
C53 (730.0MHz)245mDTG-350W
Channel icons
 E4, 3 ITV (Wales), 5 Channel 5, 6 ITV 2, 7 Channel 4 (Wales) South ads, 10 ITV3, 15 Film4, 24 ITV4, 33 ITV +1 (Wales), 73 Sewing Quarter,

 V max
C60 (786.0MHz)245mDTG-650W
Channel icons
101 BBC One HD Wales, 102 BBC Two HD (England), 103 ITV HD (ITV Central West), 104 Channel 4 HD South ads, 105 Channel 5 HD, 204 CBBC HD,

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
H/V: aerial position (horizontal or vertical)

Are you trying to watch these 0 Freeview channels?

The Cefn Mawr A (Denbighshire, Wales) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .

If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.

Which BBC and ITV regional news can I watch from the Cefn Mawr A transmitter?

regional news image
BBC Wales Today 1.2m homes 4.7%
from Cardiff CF5 2YQ, 163km south (185°)
to BBC Wales region - 206 masts.
regional news image
ITV Cymru Wales 1.2m homes 4.7%
from Cardiff CF5 6XJ, 167km south (186°)
to ITV Wales region - 206 masts.

How will the Cefn Mawr A (Denbighshire, Wales) transmission frequencies change over time?

years1984-971997-981998-20092009-132013-182013-1731st Mar 2019-
aerial groupC/D EC/D EC/D EC/D EC/D EC/D EC/D E

orange background for multiplexes names more
green background for transmission frequencies
lilac background for power levels in watts
800MHz band: 4G mobile started in 2013
700MHz band: 4G from 30 June 2020more
600MHz band: new or moved digital TV services more
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W
Italics for analogue, digital switchover was Wednesdays 28th October and 25th November 2009.

How do the old analogue and currrent digital signal levels compare?

Analogue 1-4 160W
BBCA, D3+4, BBCB(-5.1dB) 50W

Which companies have run the Channel 3 services in the Moel-Y-Parc transmitter area

Sep 1962-Jul 1964Wales (West and North) Television (Teledu Cymru)
Jul 1964-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. Cefn Mawr A 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.

Friday, 22 April 2011
k wild
3:33 PM Llangollen

When Winter Hill changed frequencies on the 20th for stage 2 I expected to receive the Welsh digital stuff from Cefn Mawr. Is the transmitter even switched on! Channels 53 57 and 60 on my tv all are showing "no signal", not even a twitch.So before having the ariel rechecked any advise please.

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k wild's 5 posts GB
k wild
3:34 PM Llangollen

Last postshould refer to the Wrekin not Winter Hill sorry

link to this
k wild's 5 posts GB
Saturday, 23 April 2011
7:42 AM

k wild: Cefn Mawr has been providing digital services since Wednesday 25th November 2009, and you should, with a rooftop aerial, be able to receive the services from it 100%.

So, yes, I would check your aerial is pointing the right way.

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Briantist's 38,786 posts Owner Owner GB
Monday, 19 September 2011
K Roberts
7:57 PM Wrexham

I live in Acrefair, I cannot get a signal from the Cefn Mawr transmitter, is there any way I can get the Welsh channels? I'm using one of the West Midlands transmitters at the moment

link to this
K Roberts's 1 post GB
Wednesday, 21 September 2011
9:11 AM

K Roberts: Yes, on Freesat you can get the Welsh channels.

link to this
Briantist's 38,786 posts Owner Owner GB
Wednesday, 28 September 2011
k w wild
4:28 PM Llangollen

Channels for Cefn Mawr are 53,57 and 60. The Wrekin is still transmitting (albeit on low power) on 53 and 57 and drowning little old Cefn. I can't disable the Wrekin ariel since from home the Wrekin and Cefn transmitters are almost in line.
I am also receiving channels from Sutton Coldfield which is also more or less in line.

Any advice on how to get some Welsh stuff without losing the Midlands progs.

link to this
k w wild's 5 posts GB
Mike Dimmick
6:24 PM

k w wild: The Wrekin is no longer transmitting on C53 or C57. It moved to final channels this morning.

Chances are you actually have too *much* signal. Anything you do to correct this may well stop the West Midlands services working, though.

For best results from Cefn Mawr you need a SMALL aerial oriented vertically - elements going up-and-down - pointing roughly south-south-east (158°). For best results from Sutton Coldfield you need a horizontally-polarized aerial pointing east-south-east (116°). For The Wrekin, a horizontally-polarized aerial pointing directly south-east (133°) would give the best results.

Using grouped aerials, you would use a C/D for Cefn Mawr, a Group B for Sutton Coldfield, and a Group K or wideband for The Wrekin.

You may find that switching to horizontal polarization and aiming the aerial somewhere between Cefn Mawr and The Wrekin gives best results; signals from Cefn Mawr should be stronger without significant aerial gain than from The Wrekin. If not, you may have to consider combining two aerials, one vertical, one horizontal.

link to this
Mike Dimmick's 2,486 posts Platinum Platinum GB
Thursday, 29 September 2011
k w wild
10:16 AM Llangollen

Mike Dimmick

The Wrekin is still transmitting on 53 & 57 at low power of 1000w.and that is the problem. Progs include Picktv, Dave, Challenge and Film4. If I unplug all ariels and use only a small indoor one aimed across the valley at Cefn channels 53 and 57 are ok but of course all the midlands stuff has disappeared. I guess that until or unless the Wrekin stops using 53 and 57 or Cefn changes I'm in Wales without Welsh tv.

link to this
k w wild's 5 posts GB
Mike Dimmick
11:21 AM

k w wild: This site is not always entirely up-to-date. The Wrekin, Bromsgrove and Lark Stoke all had a change yesterday to get the commercial multiplexes onto their final allocations of C41, C44 and C47. These channels were previously used by low-power multiplexes at Sutton Coldfield; after Sutton Coldfield's DSO last week, The Wrekin/Bromsgrove/Lark Stoke could all move to the final channels.

Digital UK's installer newsletter describing the changes at The Wrekin can be found at….pdf . Posts on The Wrekin transmitter page on this site confirm that the changes did happen.

If it works on an indoor aerial, the problem is too much signal from the main aerial. The relative amount of interference should be the same on the indoor aerial as on the rooftop aerial (may be slightly different as the two will have different amounts of cross-polar rejection). If you have an amplifier (sometimes called a booster), remove it. If not, or if that doesn't help, add an attenuator.

link to this
Mike Dimmick's 2,486 posts Platinum Platinum GB
k w wild
1:17 PM Llangollen

Mike Dimmick,
Not sure what's changed since last night but yet another first time install this pm picked 53 and 57 from Cefn not the Wrekin which it was doing last night.
This site is still showing 53 and 57 as low power from the Wrekin so with my experience that has to be incorrect but I've got the Welsh stuff in the 800's so I'm happy.

Thanks for your help

link to this
k w wild's 5 posts GB
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