Freeview Light on the Llwyn Onn (Gwynedd, Wales) transmitter
 | Google map |  | Bing map |  | Google Earth |  | 52.738,-4.038 or 52°44'15"N 4°2'17"W |  | LL42 1DX |
The symbol shows the location of the Llwyn Onn (Gwynedd, Wales) transmitter which serves less than 500 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 Llwyn Onn (Gwynedd, Wales) mast?
Llwyn Onn transmitter - Llwyn Onn transmitter: Possible effect on TV reception week commencing 11/11/2024 Screen may go black 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.
H/V: aerial position (horizontal or vertical)
The Llwyn Onn (Gwynedd, Wales) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: U&Yesterday, 4seven, 5Action, 5STAR, 5USA, Al Jazeera Eng, Al Jazeera English, Blaze, Blaze +1, Challenge, Channel 5 +1, DMAX, E4 Extra, YAAAS!, Film4 +1, Food Network, FRANCE 24 (in English), GREAT! action, GREAT! christmas, GREAT! movies, GREAT! romance mix, HGTV, HobbyMaker, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, Legend, PBS America, Quest +1, Quest Red, Really, Sky Mix, Sky News, Talking Pictures TV, That's 90s, That's TV 2, Together TV, TRUE CRIME, TRUE CRIME XTRA, U&Dave, U&Dave ja vu, U&Drama +1, U&W.
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 Llwyn Onn 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.
| Mux | H/V | Frequency | Height | Mode | Watts |
| PSB1 BBCA | V max | C25 (506.0MHz) | 305m | DTG- | 14W |
 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, plus 14 others | |||||
| PSB2 D3+4 | V max | C22 (482.0MHz) | 305m | DTG- | 14W |
 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 26 ITV4, 28 ITVBe, 30 E4 +1, 35 ITV1 +1 (Wales), 71 That’s 60s, | |||||
| PSB3 BBCB | V max | C28 (530.0MHz) | 305m | DTG- | 14W |
 46 5SELECT, 101 BBC One HD Wales, 102 BBC Two HD Wales, 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 | |||||
Are you trying to watch these 44 Freeview channels?
The Llwyn Onn (Gwynedd, Wales) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: U&Yesterday, 4seven, 5Action, 5STAR, 5USA, Al Jazeera Eng, Al Jazeera English, Blaze, Blaze +1, Challenge, Channel 5 +1, DMAX, E4 Extra, YAAAS!, Film4 +1, Food Network, FRANCE 24 (in English), GREAT! action, GREAT! christmas, GREAT! movies, GREAT! romance mix, HGTV, HobbyMaker, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, Legend, PBS America, Quest +1, Quest Red, Really, Sky Mix, Sky News, Talking Pictures TV, That's 90s, That's TV 2, Together TV, TRUE CRIME, TRUE CRIME XTRA, U&Dave, U&Dave ja vu, U&Drama +1, U&W.
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 Llwyn Onn transmitter?
BBC Wales Today 1.2m homes 4.7%
from Cardiff CF5 2YQ, 149km south-southeast (159°)
to BBC Wales region - 206 masts.
ITV Cymru Wales 1.2m homes 4.7%
from Cardiff CF5 6XJ, 151km south-southeast (161°)
to ITV Wales region - 206 masts.
How will the Llwyn Onn (Gwynedd, Wales) transmission frequencies change over time?
| 1984-97 | 1997-98 | 1998-2009 | 2009-13 | 17 Oct 2018 | |||||
| A K T | A K T | A K T | A K T | A K T | |||||
| C22 | BBC1waves | BBC1waves | BBC1waves | D3+4 | D3+4 | ||||
| C25 | ITVwaves | ITVwaves | ITVwaves | BBCA | BBCA | ||||
| C28 | BBC2waves | BBC2waves | BBC2waves | BBCB | BBCB | ||||
| C32 | C4waves | C4waves | C4waves |
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 19 Aug 09 and 16 Sep 09.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-4 | 35W | |
| BBCA, D3+4, BBCB | (-4dB) 14W |
Which companies have run the Channel 3 services in the Preseli transmitter area
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Monday, 28 October 2024
Transmitter engineering
10:48 AM
10:48 AM
Llwyn Onn transmitter - Llwyn Onn transmitter: Possible effect on TV reception week commencing 28/10/2024 Screen may go black on some or all channels [DUK]
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Monday, 4 November 2024
Transmitter engineering
5:09 AM
5:09 AM
Llwyn Onn transmitter - Llwyn Onn transmitter: Possible effect on TV reception week commencing 04/11/2024 Screen may go black on some or all channels [DUK]
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Monday, 11 November 2024
Transmitter engineering
5:10 AM
5:10 AM
Llwyn Onn transmitter - Llwyn Onn transmitter: Possible effect on TV reception week commencing 11/11/2024 Screen may go black on some or all channels [DUK]
| link to this comment |