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 25/11/2024 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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Wednesday, 15 January 2020
C
Chris.SE8:02 PM
Fred:
Hello, happy new year. The Freeview Detailed Coverage Checker shows that most properties in your postcode should get all the multiplexes from Llanddona, if you are tucked in close to that hill (even though it's not that big) it could be a problem.
Having had a look around on street view, most aerials I can see are pointing at Llanddonna but I also noticed one or two pointing at a low power relay at Amlwch - it's only 3-4 kilometres away, but these are "Light" transmitters and only have the PSB multiplexes, see Channel listings | Freeview (note there's no COMs 7&8 at Llanddonna).
There looked like quite a few properties may have loft aerials as no external ones were visible (not recommended unless you do have a very good signal).
For reception from Llanddonna, the aerial must have its rods horizontal and be pointing ~SE (127 degrees). The relay at at Amlwch is at bearing 304 degrees ~NW with the rods vertical (almost directly the opposite direction to Llanddonna, but it is very low power. I did spot an odd aerial pointing towards Arfon, some way to the south but that again is only a "Light" transmitter. I saw one I could swear is pointing to either Moel-y-parc or Winter Hill, couldn't be sure which, but reception from either is likely to be variable to poor for a lot of the multiplexes.
So you need to check which way your aerial is pointing ~SE with rods horizontal, or NW with rods vertical. If it is pointing SE, any idea how old it is? Try and look at the state of the coax downlead. Does it still look in good condition, or does the outside seem hard and brittle?
Have a chat with your immediate neighbours, see which way their aerials point, and if you need or decide to go for a new one, find out from locals who is a good knowledgeable local installer - there are a few who just shove an aerial up and hope for the best!
If your aer
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Thursday, 6 February 2020
F
Fred9:50 PM
Chris,
I am tucked close to the hill and think that is the problem.
Thanks for your help
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Friday, 7 February 2020
C
Chris.SE12:40 AM
Fred:
Hello Fred, you haven't said where your aerial is, whether the rods are horizontal or vertical and which way it's pointing!
Is it accessible? If you can see the end of it, can you see if it has a colour bung in the end?
The bung might be Green, Yellow, Black, Brown, or if pointing at Amlwch it could be Red or Grey.
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Thursday, 30 April 2020
L
Lorraine Foster8:54 PM
Hi my dad lives in Benllech and says he cannot get BBC but all the other channels. He is elderly and has been told the BBC have reduced thier outage?
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L
Lorraine Foster8:56 PM
Hi my dad lives in Benllech. He is unable to get BBC but all the other channels.He had been told the BBC have reduced thier outage. He is elderly. Can you offer any advice?
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Friday, 1 May 2020
C
Chris.SE2:22 AM
Lorraine Foster:
Well I'm not sure where he got that information, but at worst it's a load of cobblers, at best it's misleading, normally he shouldn't have any problem receiving the BBC channels, but there was a fault reported by the BBC From 5:49am to 6:03am on 30th Apr 2020 PSB1/BBC A Slightly reduced power due to a fault.
It may be worth that he checks in his TV tuning section, that he's tuned to the correct UHF channels for Llanddona, 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 Channels would be on multiplex BBCA UHF channel C40.
It's possible to be inadvertently tuned to the Winter Hill transmitter on UHF C32 or C50 where there is transmitter work currently listed.
If he's not sure how to check this, the easiest solution may be to unplug the aerial and carry out an automatic retune which should clear all previous tuning as no channels are found. Plug the aerial back in and repeat the automatic retune which will hopefully restore all channels correctly.
If there are still problems, please post back with a full postcode.
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Saturday, 9 May 2020
L
Lorraine Foster7:18 PM
Thank you very much for responding and the information. It's very much appreciated.
Lorraine
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Friday, 19 June 2020
S
Stephen Lawson10:26 AM
Llanerchymedd
Hi. I am in Llannerch-y-medd LL71 8EG on Anglesey and I had an aerial installed 3 years ago and I have always had the odd problem with losing the picture for a few seconds. Generally according to the signal information screen on the Samsung tv the signal quality is 100 and the strength is 90 but every now and then they drop very low and the picture goes. He fitted a Log Periodic Aerial in the loft, rods are horizontal but it seems to be pointing away from Llandonna not towards it. Is there a way of confirming the actual transmitter being used from the TV signal info screen?
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Stephen's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data S's Freeview Detailed Coverage
Sunday, 21 June 2020
A
at8:55 AM
Stephen Lawson:
When you say that the aerial seems to be pointing away from Llandonna, what direction does it seem to be pointing?
There is a couple of other transmitters that you might receive, but the Freeview Detailed Coverage Checker does not predict good coverage from them other than Arfon almost due S of you, but that only has the 3 PSB multiplexes.
One of the easiest ways to see what transmitter(s) you may be receiving is looking at the TV's tuning section, it may be the manual tuning or signal check section, to what UHF channels numbers each multiplex is tuned to. Post all of them and we can then check. Other than that what information do you see on screen?
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Wednesday, 24 June 2020
C
Chris.SE5:47 PM
Stephen Lawson:
Should have added, if the aerial is pointing at Arfon, the rods should be vertical. If it's pointing at Llanddonna, are there any trees in the line-of-sight?
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