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.
This transmitter has no current reported problems
The BBC and Digital UK report there are no faults or engineering work on the Llwyn Onn (Gwynedd, Wales) transmitter._______
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: 4seven, 5Action, 5STAR, 5USA, Al Jazeera Eng, Blaze, Blaze +1, CBS Reality, Challenge, Channel 5 +1, CITV, YAAAS!, Dave, Dave ja vu, DMAX, Drama +1, E4 Extra, Film4 +1, Food Network, GB News, GREAT! movies, GREAT! movies action, HGTV, HobbyMaker, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, Legend, PBS America, pick, Pop Player, Quest +1, Quest Red, Really, Sky News, Smithsonian Channel, Talking Pictures TV, TCC, That's TV (UK), Together TV, W, Yesterday +1.
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, 250 BBC Red Button, plus 13 others | |||||
PSB2 D3+4 | V max | C22 (482.0MHz) | 305m | DTG- | 14W |
5 Channel 5, 6 ITV 2, 10 ITV3, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 26 ITV4, 30 E4 +1, 35 ITV1 +1 (Wales), | |||||
PSB3 BBCB | V max | C28 (530.0MHz) | 305m | DTG- | 14W |
56 5SELECT, 101 BBC One HD Wales, 102 BBC Two HD (England), 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 43 Freeview channels?
The Llwyn Onn (Gwynedd, Wales) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: 4seven, 5Action, 5STAR, 5USA, Al Jazeera Eng, Blaze, Blaze +1, CBS Reality, Challenge, Channel 5 +1, CITV, YAAAS!, Dave, Dave ja vu, DMAX, Drama +1, E4 Extra, Film4 +1, Food Network, GB News, GREAT! movies, GREAT! movies action, HGTV, HobbyMaker, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, Legend, PBS America, pick, Pop Player, Quest +1, Quest Red, Really, Sky News, Smithsonian Channel, Talking Pictures TV, TCC, That's TV (UK), Together TV, W, Yesterday +1.
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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Wednesday, 25 January 2017
Transmitter engineering
1:32 PM
1:32 PM
LLWYN ONN transmitter - Freeview: BBC Digital TV Off Air from 11:07 yesterday to 11:10 yesterday, HD Digital TV Off Air from 11:07 yesterday to 11:10 yesterday. FM: Radio 1 FM Weak Signal from 10:35 yesterday to 13:15 yesterday, Radio 2 FM Weak Signal from 10:35 yesterday to 13: [BBC]
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Thursday, 26 January 2017
Transmitter engineering
4:33 AM
4:33 AM
LLWYN ONN transmitter - Freeview: BBC Digital TV Off Air from 11:07 on 24 Jan to 11:10 on 24 Jan, HD Digital TV Off Air from 11:07 on 24 Jan to 11:10 on 24 Jan. FM: Radio 1 FM Weak Signal from 10:35 on 24 Jan to 13:15 on 24 Jan, Radio 2 FM Weak Signal from 10:35 on 24 Jan to 13: [BBC]
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Tuesday, 21 March 2017
Transmitter engineering
11:33 PM
11:33 PM
LLWYN ONN transmitter - Freeview: HD Digital TV Off Air from 19:59 today to 20:03 today. [BBC]
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Wednesday, 22 March 2017
Transmitter engineering
4:33 AM
4:33 AM
LLWYN ONN transmitter - Freeview: HD Digital TV Off Air from 19:59 yesterday to 20:03 yesterday. [BBC]
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Thursday, 23 March 2017
Transmitter engineering
4:33 AM
4:33 AM
LLWYN ONN transmitter - Freeview: HD Digital TV Off Air from 19:59 on 21 Mar to 20:03 on 21 Mar. [BBC]
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Monday, 16 October 2017
Transmitter engineering
9:09 PM
9:09 PM
LLWYN ONN transmitter - Freeview: BBC Digital TV Off Air from 17:13 today, HD Digital TV Off Air from 17:13 today. [BBC]
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Tuesday, 17 October 2017
Transmitter engineering
12:09 AM
12:09 AM
LLWYN ONN transmitter - Freeview: BBC Digital TV Off Air from 17:13 today, HD Digital TV Off Air from 17:13 today. FM: Radio 1 FM Off Air from 17:13 today, Radio 2 FM Off Air from 17:13 today, Radio 3 FM Off Air from 17:13 today, Radio Cymru FM Off Air from 17:13 today. [BBC]
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Transmitter engineering
6:09 AM
6:09 AM
LLWYN ONN transmitter - Freeview: BBC Digital TV Off Air from 17:13 yesterday, HD Digital TV Off Air from 17:13 yesterday. FM: Radio 1 FM Off Air from 17:13 yesterday, Radio 2 FM Off Air from 17:13 yesterday, Radio 3 FM Off Air from 17:13 yesterday, Radio Cymru FM Off Air from 1 [BBC]
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Transmitter engineering
9:09 AM
9:09 AM
LLWYN ONN transmitter - Freeview: BBC Digital TV Off Air from 17:13 yesterday to 02:20 today, HD Digital TV Off Air from 17:13 yesterday to 02:20 today. FM: Radio 1 FM Off Air from 17:13 yesterday to 02:23 today, Radio 2 FM Off Air from 17:13 yesterday to 02:23 today, Radio 3 FM [BBC]
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Wednesday, 18 October 2017
Transmitter engineering
6:09 AM
6:09 AM
LLWYN ONN transmitter - Freeview: BBC Digital TV Off Air from 17:13 on 16 Oct to 02:20 yesterday, HD Digital TV Off Air from 17:13 on 16 Oct to 02:20 yesterday. FM: Radio 1 FM Off Air from 17:13 on 16 Oct to 02:23 yesterday, Radio 2 FM Off Air from 17:13 on 16 Oct to 02:23 yeste [BBC]
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