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Freeview Light on the Londonderry (Northern Ireland) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps55.003,-7.370 or 55°0'11"N 7°22'11"Wsa_postcodeBT48 0JS


The symbol shows the location of the Londonderry (Northern Ireland) transmitter which serves 37,000 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.

This transmitter has no current reported problems

The BBC and Digital UK report there are no faults or engineering work on the Londonderry (Northern Ireland) transmitter.

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name

Which Freeview channels does the Londonderry 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.

 V max
C29 (538.0MHz)286mDTG-2,000W
Channel icons
1 BBC One (SD) Northern Ireland, 2 BBC Two Northern Ireland, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, plus 14 others

 V max
C31 (554.0MHz)286mDTG-2,000W
Channel icons
3 UTV (SD) (UTV), 4 Channel 4 (SD) NI ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 NI ads, 18 More4, 26 ITV4, 28 ITVBe, 30 E4 +1, 35 UTV +1 (UTV),

 V max
C37 (602.0MHz)286mDTG-2,000W
Channel icons
46 5SELECT, 101 BBC One HD Northern Ireland, 102 BBC Two HD Northern Ireland, 103 UTV HD (UTV), 104 Channel 4 HD NI ads, 105 Channel 5 HD, 106 BBC Four HD, 107 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

H/V: aerial position (horizontal or vertical)

Are you trying to watch these 44 Freeview channels?

the effected channels
the effected channels
the effected channels
the effected channels

The Londonderry (Northern Ireland) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: 4seven, 5Action, 5STAR, 5USA, Al Jazeera Eng, Al Jazeera English, Blaze, Blaze +1, Challenge, Channel 5 +1, Dave, Dave ja vu, DMAX, Drama +1, E4 Extra, YAAAS!, Film4 +1, Food Network, GREAT! action, GREAT! movies, GREAT! romance, 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, TCC, That's 90s, That's TV 2, Together TV, TRUE CRIME, TRUE CRIME XTRA, 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 Londonderry transmitter?

regional news image
BBC Newsline 0.6m homes 2.5%
from Belfast BT2 8HQ, 1,052km northeast (50°)
to BBC Northern Ireland region - 46 masts.
regional news image
UTV Live 0.6m homes 2.5%
from Belfast BT7 1EB, 1,052km northeast (50°)
to UTV region - 46 masts.

How will the Londonderry (Northern Ireland) transmission frequencies change over time?

1950s-80s1984-971997-981998-20122012-134 Sep 2019

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 10 Oct 12 and 24 Oct 12.

How do the old analogue and currrent digital signal levels compare?

Analogue 5 10kW
Analogue 1-4(-4.9dB) 3.2kW
BBCA, D3+4, BBCB(-7dB) 2kW

Which companies have run the Channel 3 services in the Limavady transmitter area

Oct 1959-May 2006Ulster Television
May 2006-Dec 2014UTV plc
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Londonderry was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Wednesday, 26 September 2012
ken breslin
11:38 PM

I live in a poor tv signal area in Derry. With the sheriff mountain transmitter transmitting from October 12 does this mean I will receive a greater tv signal strength?

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ken breslin's 1 post GB flag
Dave Lindsay

11:53 PM

ken breslin: It depends which transmitter you receive your TV from. When you say "poor TV signal area", which signal are you referring to?

If you are referring to digital (Freeview), then you must be receiving it from another transmitter, probably Limavady, as Sheriff Mountain doesn't broadcast Freeview yet. In which case, if it's a bit intermittent now, then the increase in power at switchover should see that it's more reliable.

See my posting of 18 April 2012 @ 11:09AM to Dermy, immediately above yours. Sheriff Mountain will only carry the Public Service Broadcaster channels, so you will probably want to stick with Limavady if you can.

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Dave Lindsay's 5,724 posts GB flag
Thursday, 27 September 2012
Dave Lindsay

12:00 AM

ken breslin: I should add that you receive from one transmitter or the other, this being dependent on the direction and polarisation of your aerial.

So if your aerial is directed to Limavady, then the introduction of Sheriff Mountain plays no part in your reception. However, at the same time Limavady's power increases which should help you (if indeed you receive from Limavady).

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Dave Lindsay's 5,724 posts GB flag
Friday, 28 September 2012
9:07 AM

Hi, can I confirm, Holywell hill will be providing the rte channels all of them ?,will sheriffs mountain after switch over provide any station or are all the other stations coming form limavady?

Best Chris

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Chris's 1 post GB flag
Dave Lindsay

10:05 AM

Chris: Refer to my posting, above, of 18 April 2012 @ 11:09AM.
Sheriff Mountain will not broadcast RT or TG4 after switchover. It will broadcast only Freeview Lite (PSBs only) channels.
"If" reception from Limavady is a possibility at your location, then this may provide you with a full Freeview service, although it too will not carry RT/TG4 either so you will still have to rely on Holywell Hill for those.

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Dave Lindsay's 5,724 posts GB flag
Thursday, 4 October 2012
4:28 PM

once the swichover takes place,will the limavady signal increase?im livin in letterkenny,gonna put up my limavady aerial 2morrow

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victor's 1 post IE flag
Dave Lindsay

4:59 PM

victor: Yes.

Switchover at Limavady will take place in two stages. The first stage is on this coming Wednesday when BBC Two analogue will be switched off and the BBC standard definition digital services will go on full power. The rest of the analogue channels are turned off on 24th and the other digital channels come on the air on full power then.

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Dave Lindsay's 5,724 posts GB flag
9:39 PM

will sheriffs mountain ever have FULL FREEVIEW channels like the Limavady transmitter?
I cannot pick up a signal from Limavady

link to this comment
Brian's 2 posts GB flag
Dave Lindsay

10:42 PM

Brian : No, never. This is because the Commercial broadcasters don't consider it worth their while to transmit from over 1,000 small relay sites like Sheriff Mountain.

In Northern Ireland, only Brougher Mountain, Divis and Limavady will carry the Commercial multiplexes.

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Dave Lindsay's 5,724 posts GB flag
Monday, 8 October 2012
mark harvey
12:50 PM

will i be ok as im using an indoor ariel its a booster ariel vivamco u call it

link to this comment
mark harvey's 1 post GB flag
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