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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Sunday, 2 December 2018
S
StevensOnln12:17 PM
T.M. James: COM7 & COM8 are not being added to any additional transmitters. They are temporary services which are expected to close by 2022.
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Thursday, 27 December 2018
8:54 PM
Is there a direct correspondence between the Winter Hill
Mux1, Mux2, Mux3, Mux 4, Mux 5, Mux 6, and the Llanddona
Psb1,Psb 2, Psb 3, Psb 4, Psb 5, Psb 6 .? Please.
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MikeP
9:11 PM
9:11 PM
G H Davies:
Llanddona has multiplexes named PSB1, PSB2, PSB3, COM3 (SDN), COM5 (ARQA) and COM6 (ARQB). This is exactly the same naming scheme as at Winter Hill, but the muiltiplexes are on different frequencies so as to avoid interfering with each other or other transmssions in the same reception area. The naming of a multiplex is for convenience mainly but all full Freeview transmitters carry all six multiplexes and a further 30 main transmitters also carry the COM7 and COM8 multiplexes. In addition there are a large number of Freeview Light transmitters that carry the 3 PSB services only. Apart from regional variations, for local news for example, the programming is largely the same for all national programming.
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Thursday, 10 January 2019
F
fn engineers12:11 PM
Since the 700Mhz clearance event on the 14th Nov 2018, I have had a large number of customers reporting problems in receiving Com 4, 5 and 6 including myself. I can report that signal strength in each case is always good but signal quality has deteriorated and is now very poor with frequent vision breakup. I am personally having problems with Com 6 where signal strength is consistently above 95%, however quality is always around 20%. I live in direct line of sight of the Llanddona transmitter and previous to the frequency changes these mux's were not giving me and other people any problems. Please can you tell me what else changed on the 14th of November?
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MikeP
4:39 PM
4:39 PM
fn engineers:
You should by now know that signal strengths above about 85% are likely to give pixilation or loss of channels. Too much signal strength is a bad thing (there's an article on this wen=bsite about that, you can search for it). In such cases reducing the signal; strength to between 60% and 85% usualy solves the problems.
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F
fn engineers10:48 PM
Yes, I agree MikeP. However, when I remove the dist. amplifier and have direct feed from the antenna the strength will drop to around 74% but quality is then around 10% with an unwatchable picture. The 2 PSB mux's which are double the power are not giving me any problems whatsoever (strength about the same and quality around 80%). The weather obviously affects things and evenings worse, so I am beginning to wonder whether there are any underlying signals from Ireland which are affecting reception. I have an elderly lady who lives down the road that's completely lost picture from Com4 & 5 since the frequency change with com 6 appearing occasionally but her TV will show channel id and indicate a signal strength of around 60% for these muxs.
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Friday, 11 January 2019
MikeP
11:10 AM
11:10 AM
fn engineers:
I suggest you have a look at the Digital UK Coverage Checker at Digital UK - Coverage checker to ensure that the correct channels are being used.
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Wednesday, 16 January 2019
G
Gwenno Jones-Williams12:55 AM
I have no signal in Bodffordd, Anglesey
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S
StevensOnln110:16 AM
Gwenno Jones-Williams: According to the engineering posts which have appeared below yours, the transmitter was off air for a few hours overnight.
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Monday, 13 May 2019
S
Sue Bellringer11:55 AM
Ever since we were told to retune our tv, the signal from the Llanddona transmitter has been poor at best, often non existent. It makes no difference whatever the weather is.
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