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Freeview Light on the Caernarfon (Gwynedd, Wales) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps53.142,-4.265 or 53°8'30"N 4°15'54"Wsa_postcodeLL55 1BT


The symbol shows the location of the Caernarfon (Gwynedd, Wales) transmitter which serves 900 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 Caernarfon (Gwynedd, Wales) mast?

CAERNARFON transmitter - Freeview: Weather conditions may be affecting your reception from 26 Nov 21:40 until 26 Nov 22:08. Weather conditions may be affecting your reception from 26 Nov 05:46 until 26 Nov 08:52. Weather conditions may be affecting your reception from 24 Nov 1 BBC

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

Which Freeview channels does the Caernarfon 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
C24 (498.0MHz)28mDTG-35W
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, 250 BBC Red Button, plus 13 others

 V max
C27 (522.0MHz)28mDTG-35W
Channel icons
5 Channel 5, 6 ITV 2, 10 ITV3, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 26 ITV4, 30 E4 +1, 35 ITV1 +1 (Wales),

 V max
C21+ (474.2MHz)28mDTG-65W
Channel icons
56 5SELECT, 101 BBC One HD Wales, 102 BBC Two HD (England), 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

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 43 Freeview channels?

the effected channels
the effected channels
the effected channels
the effected channels

The Caernarfon (Gwynedd, Wales) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: 4seven, 5Action, 5STAR, 5USA, Aljazeera English, Blaze, Blaze +1, CBS Reality, Challenge, Channel 5 +1, CITV, YAAAS!, Dave, Dave ja vu, DMAX, Drama +1, E4 Extra, Film4 +1, Food Network, GB News, GREAT! movies, GREAT! movies action, HGTV, HobbyMaker, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, Legend, PBS America, pick, POP MAX, Quest +1, Quest Red, Really, Sky News, Smithsonian Channel, Talking Pictures TV, TCC, That's TV (UK), Together TV, W, Yesterday +1.

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 Caernarfon transmitter?

regional news image
BBC Wales Today 1.2m homes 4.7%
from Cardiff CF5 2YQ, 196km south-southeast (160°)
to BBC Wales region - 206 masts.
regional news image
ITV Cymru Wales 1.2m homes 4.7%
from Cardiff CF5 6XJ, 199km south-southeast (161°)
to ITV Wales region - 206 masts.

How will the Caernarfon (Gwynedd, Wales) transmission frequencies change over time?

1984-971997-981998-20092009-1331 Dec 2018-

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 21 Oct 09 and 18 Nov 09.

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

Analogue 1-4(-4dB) 2W

Which companies have run the Channel 3 services in the Llanddona 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. Caernarfon 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.

Thursday, 29 July 2021
Transmitter engineering

3:11 PM

CAERNARFON transmitter - Freeview: Weather conditions may be affecting your reception from 26 Jul 02:51 until 26 Jul 02:58. . [BBC]

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Transmitter engineering's 138,029 posts GB
Tuesday, 21 September 2021
Transmitter engineering

4:49 PM

CAERNARFON transmitter - Freeview: Off the air due to a fault from 21 Sep 16:27 until 21 Sep 16:31. . [BBC]

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Transmitter engineering's 138,029 posts GB
Saturday, 4 December 2021
Clare Dobie
8:54 PM

I have had no free view connection for two days now. I live in ll54 5al area. And contrary to statements there is no problem in thisl there is no problem there is. Last week no signal for a day. Sort this out its not on

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Clare Dobie's 1 post GB
Sunday, 5 December 2021

4:19 AM

Clare Dobie:

Not quite sure why you've posted on the Caernarfon transmitter page, it's a very very low power relay, miles from you and your postcode is not predicted to get any signals from it. You are predicted to get good signals from the Trefor relay.

By the way, this is an independent technical helpsite, we are not the broadcasters or transmitter engineering.

If you are getting signals from Trefor, your aerial should be pointing fractionally west of NW (bearing 307 degrees) with its rods (or squashed Xs) vertical. There is also predicted good signals from Preseli however they may be more subject to changes in some weather conditions, a reliable local aerial installer may know (the aerial would be pointing fractionally west of due S). There's also predicted reception from Blaenplwyf but those signals would be poor/variable/or none depending on multiplex (groups of channels).

None of the transmitters mentioned have had/got any reported faults recently that I can find. With the recent weather conditions it's possible Trefor may have suffered brief power outages.
I would check with your neighbours if they are receiving Freeview OK because there's a possibility the weather may have done damage to your aerial installation.

I would check that your aerial seems intact and pointing in the correct direction and that your downlead looks undamaged (especially if it is old). Also check all your coax plugs, connections, flyleads etc, especially if you've changed anything in your installation recently, unplug connectors check for corrosion or other problems and reconnect them. Flyleads are a common problem, try swapping/changing them. See what signal strengths and quality you are getting for the multiplexes (groups of channels) shown in your TV's tuning section.
The correct UHF channel tuning for Trefor is C32, C34, C35 (C means channel) for the 3 PSB multiplexes.

If you have changed anything in your setup, make sure you don't have any HDMI leads near unscreened/poorly screened flyleads/aerial leads as HDMI has been known to cause interference.

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Chris.SE's 3,170 posts GB
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Your comment please
Please post a question, answer or commentIf you have Freeview reception problems before posting a question your must first do this Freeview reset procedure then see: Freeview reception has changed, Single frequency interference, and Freeview intermittent interference.

If you have no satellite signal, see Sky Digibox says 'No Signal' or 'Technical fault'

If you have other problems, please provide a full (not partial) postcode (or preferably enter it in box at the top right) and indicate where if aerial is on the roof, in the loft or elsewhere.

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