Full Freeview on the Llanddona (Isle of Anglesey, Wales) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 53.307,-4.128 or 53°18'25"N 4°7'41"W |  | LL58 8YB |
The symbol shows the location of the Llanddona (Isle of Anglesey, Wales) transmitter which serves 44,000 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 Llanddona (Isle of Anglesey, Wales) mast?
Llanddona transmitter - Llanddona 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
H/V: aerial position (horizontal or vertical)
The Llanddona (Isle of Anglesey, 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 Freeview channels does the Llanddona 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
H/V: aerial position (horizontal or vertical)
The Llanddona (Isle of Anglesey, 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 Llanddona transmitter?
BBC Wales Today 1.2m homes 4.7%
from Cardiff CF5 2YQ, 210km south-southeast (164°)
to BBC Wales region - 206 masts.
ITV Cymru Wales 1.2m homes 4.7%
from Cardiff CF5 6XJ, 213km south-southeast (165°)
to ITV Wales region - 206 masts.
How will the Llanddona (Isle of Anglesey, Wales) transmission frequencies change over time?
| 1950s-80s | 1984-97 | 1997-98 | 1998-2009 | 2009-13 | 2013-18 | 2013-17 | 14 Nov 2018 | ||
| VHF | C/D E | C/D E | C/D E | E T | E T | E T | B E T | ||
| C1 | BBCtvwaves | ||||||||
| C40 | ArqB | ArqB | BBCA | ||||||
| C41 | SDN | ||||||||
| C43 | SDN | SDN | SDN | D3+4 | |||||
| C44 | ArqA | ||||||||
| C46 | ArqA | ArqA | ArqA | BBCB | |||||
| C47 | ArqB | ||||||||
| C50tv_off | ArqB | ||||||||
| C51tv_off | _local | _local | _local | _local | |||||
| C53tv_off | C4waves | C4waves | C4waves | BBCB | BBCB | BBCB | |||
| C57tv_off | BBC1waves | BBC1waves | BBC1waves | BBCA | BBCA | BBCA | |||
| C60tv_off | ITVwaves | ITVwaves | ITVwaves | -D3+4 | -D3+4 | -D3+4 | |||
| C63 | BBC2waves | BBC2waves | BBC2waves |
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 | 100kW | |
| BBCA, D3+4, BBCB | (-7dB) 20kW | |
| SDN, ARQA, ARQB | (-10dB) 10kW | |
| Mux 1*, Mux 2*, Mux A*, Mux B*, Mux C*, Mux D* | (-20dB) 1000W |
Which companies have run the Channel 3 services in the Llanddona transmitter area
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Saturday, 14 November 2020
G
G jones6:20 PM
Why no channel 41 Sony movies action on the llanddona transmitter
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S
StevensOnln17:05 PM
G jones: Sony Movies Action is not broadcast from transmitters in Wales, due to the need for S4C to be broadcast from every Welsh transmitter, which takes capacity on the PSB2 multiplex used to broadcast E4 in England/Scotland/Northern Ireland, which in turn causes E4 to take space on SDN.COM4 which is used to broadcast Sony Movies Action elsewhere (presumably Sony get a discount for taking a slot with less coverage).
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Monday, 23 August 2021
G
gwil John2:12 PM
What aerial group do I need for Felinheli (LL564NZ) from Llanddona?
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S
StevensOnln15:22 PM
gwil John: A wideband type aerial such as a log periodic is generally recommended rather than a grouped aerial (unless you are in an area of weak signal) as it will cover all frequencies which could be used in the future, rather than just the frequencies used now.
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Tuesday, 24 August 2021
C
Chris.SE12:07 AM
gwil John:
An alternative would be a Group K aerial, this should also help reduce any interference from any new mobile masts which may appear in due course. As you are only 16km from Llanddona predictions show you should have very good reception.
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Tuesday, 7 December 2021
M
Mel Nevitt1:23 PM
Caernarfon
I live most of the year at LL54 5RS. and have recently purchased a LG oled smart TV. We have a hightail aerial pointing towards Llandonna transmitter on Anglesey. We borrowed a Panasonic TV to test the reception before we decided to have a TV in our home. The Panasonic was able to receive BBC HD BBC 2 HD and all ITV HD channels.
The LG channel search will not find Channels 101, 102 etc and nothing between 100 to 201??
I have either not got a setting right on the TV or those channels are not available from the Llandonna transmitter. I am 75 and just venturing into the world of a television . Please help. Cofion Mel
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Mel's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
S
StevensOnln12:29 PM
Mel Nevitt: Your postcode is predicted to have good reception from Llanddona which is only 22km away. You should certainly be able to receive BBC One HD, BBC Two HD, ITV HD, Channel 4 HD & Channel 5 HD on 101-105 as these channels are broadcast from every transmitter. Try going in to the manual tuning option on the TV's menu and do a scan of UHF channel 46.
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Saturday, 18 December 2021
I live in Dwygyfylchi and experience regular issues of interference of multiple TV channels
Probably about 2 or 3 times per month I have issues with all BBC channels but never all channels at the same time. The latest issues are today 18/12/21
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Sunday, 19 December 2021
C
Chris.SE3:12 AM
Mark Scarratt:
I assume you mean the BBC SD channels today (18/12) or does that include the HD ones as well?
When exactly was the previous occasion?
I can't find any faults listed for the transmitter and it's not been listed for Planned Engineering since the end of October. Most parts of your area should have very good reception from Llanddonna but without a full postcode the predicted reception in your locale can't be confirmed, it's possible you may be in an awkward spot!
It's possible that your problem today is weather related.
There is currently some moderate to strong temperature inversion/tropospheric ducting conditions affecting large parts of the UK and these weather conditions can disrupt reception for brief or longer periods. The conditions are predicted to last on and off for a few days.
The BBC currently have a warning in place.
That said there are a number of things worth checking.
Is your aerial external or loft mounted? How old is it (roughly)? Do you have a distribution amp/splitter?
Have you changed anything in your set up since this first started?
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) and not flapping in the wind if external. Also check all your coax plugs, connections, flyleads etc, behind the TV, unplug connectors check for corrosion or other problems and reconnect them. Flyleads are a common problem, try swapping/changing them.
If you ever retuned at anytime when you had no signal, that's never recommended as it usually just clears the correct tuning or you may end up tuned to weak signals from another transmitter.
Check in your TV's Tuning Section that you are tuned to the correct UHF channels for Llanddonna. These are C40, C43, C46, C41, C44, C47 in the order PSB1/BBCA, PSB2/D3&4, PSB3/BBCB HD, SDN/COM4, ArqA/COM5, ArqB/COM6
To be clear, the Main BBC SD Channels would be on multiplex BBCA UHF channel C40.
Check that you don't have any trees that have grown high that are on the line of sight to the transmitter (or very very close by) or things like scaffolding or new buildings.
See what signal strengths and quality you are getting for the multiplexes (groups of channels) shown in your TV's tuning section, that information may indicate issues with your aerial or downlead or possibly any distribution amp/splitter you may have.
Problematic connections, water ingress etc. can seem to affect reception of just an individual or several multiplexes.
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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Saturday, 1 January 2022
M
Mark Roberts6:16 PM
Llanfairpwllgwyngyll
why dont i have a signal on my freeview tv upstairs this was ok when i went to bed last night have tried to re tune still nothing my post code is ll61 6ny llanfairpwll.
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Mark's: ...
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