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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Tuesday, 12 April 2011
G
Gwyn9:04 PM
Caernarfon
OK, this is a strange one. Live near Bethel Caernarfon, receive freeview (HD/SD) from Llanddona. 2 Months ago had picture breakup (100% signal strenght but signal quality fluctuated badly between 20%-90%). Traced fault to bad connection on aerial (40 element Yagi type, with masterhead amplifier), made tempoary repairs and restored signal/quality back to 100%.
Decided to buy a new aerial and went for a Televes 45HD, suppose to be the best ones around. Tried the TV (Panasonic G20) and the signal quality dropped again and fluctuates between 30% - 100% ???? it also affects other tv's in the house, not just the Pani.
The Televes has a forward gain of around 16dB and a built in intellegent masterhead amplifier, just wondering of this type of aerial is picking up noise from other sources. Have fitted new amplifier/ new PF100 cable from aerial to amplifier.
Finally fitted back the old aerial and the signal/quality is back to 100%, all perfect.
Any ideas anyone.
thanks
G Jones
| link to this comment |
Gwyn's: mapG's Freeview map terrainG's terrain plot wavesG's frequency data G's Freeview Detailed Coverage
Gwyn: Sounds like you were overloading your system with too much signal strength.
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G
Gwyn9:10 PM
Caernarfon
Is this too much gain from the aerial itself, the masterhead amplifier is suppose to give the correct ouput regardless of signal strenght.
thanks
| link to this comment |
Gwyn's: mapG's Freeview map terrainG's terrain plot wavesG's frequency data G's Freeview Detailed Coverage
G
Gwyn9:17 PM
Caernarfon
If I bypass the Distribution amplifier that supplies the aerial with 12volts and connect the panasonic directly, is this worth a shot??
thanks
Gwyn
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Gwyn's: mapG's Freeview map terrainG's terrain plot wavesG's frequency data G's Freeview Detailed Coverage
Wednesday, 13 April 2011
Gwyn: This does sound problematic. You would not normally expect a Distribution amplifier to also power the masthead device.
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G
Gwyn7:01 AM
Caernarfon
Yes it does, but if no 12v is present at the masterhead amplifier the Televes masterhead amplifier would only be used as a loop through device in my understanding. i.e. no gain to compensate for the lenght of cable to the distribution amplifier. The most important factor is the gain of the aerial, this is around 16dB, if you amplify the signal you also amplify any noise picked up by that aerial.
Just going to try this with the masterhead off (acting as a loop through device) and feeding the aerial output to just one television just to prove the theory.
thanks
Gwyn
| link to this comment |
Gwyn's: mapG's Freeview map terrainG's terrain plot wavesG's frequency data G's Freeview Detailed Coverage
Gwyn: That sounds the most sensible thing to do. Not all mastheads will loopthough without the power, many will go into "no signal" mode.
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G
Gwyn5:38 PM
Caernarfon
I'll give it a go this Friday & let you know the result.
thanks
Gwyn
| link to this comment |
Gwyn's: mapG's Freeview map terrainG's terrain plot wavesG's frequency data G's Freeview Detailed Coverage
Wednesday, 20 April 2011
G
Gwyn7:04 AM
Caernarfon
The televes 45HD aerial does loop through without the 12v supply, tried this on a tempoary basis direct to one tv & the aerial pointing towards the transmitter through a velux window, seemed to be ok.
There's no switch on the distribution amplifier to cut off the supply, so back to the old drawing board. Since the master head amplifier is situated nest to the dipole a straight connection to the aerial is not an option.
Thanks
Gwyn
| link to this comment |
Gwyn's: mapG's Freeview map terrainG's terrain plot wavesG's frequency data G's Freeview Detailed Coverage
Wednesday, 24 August 2011
I
Iain Nicol9:16 PM
Leeds
I'm at LS17 9LP (Yorkshire). We've had digital for 3 or 4 years, and have recently got 2 issues. They have happened since I followed the on- screen instructions to re tune after 20th August.
Firstly - the digital signal fluctuates during the afternoon. From midday until around 8pm, we get breakup or even total loss on all channels. Reception is perfectly good the rest of the time.
Secondly, since we retuned, our "local" news on BBC (channel 1) seems to think we live in Lincolnshire. To get the Yorkshire news, we have to tune to channel 825
We have a wideband amplified aerial mounted on the wall of the house, horizontally aligned pointing at 194 degrees (to Emley Moor) direct into a sky box. The signal goes from there into a 4 way splitter for distribution to sets around the house. This configuration allows sky to also be distributed on analogue.
Any ideas why we get this fluctuation, and why the locality has changed?
| link to this comment |
Iain's: mapI's Freeview map terrainI's terrain plot wavesI's frequency data I's Freeview Detailed Coverage
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