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Freeview Light on the Long Mountain (Powys, Wales) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps52.644,-3.088 or 52°38'39"N 3°5'16"Wsa_postcodeSY21 8JA


The symbol shows the location of the Long Mountain (Powys, Wales) transmitter which serves 9,500 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 Long Mountain (Powys, Wales) transmitter.

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

Which Freeview channels does the Long Mountain 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
C33- (569.8MHz)454mDTG-400W
Channel icons
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

 V max
C36 (594.0MHz)454mDTG-400W
Channel icons
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),

 V max
C48 (690.0MHz)454mDTG-400W
Channel icons
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

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 Long Mountain (Powys, Wales) 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 mix, GREAT! romance, 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 Long Mountain transmitter?

regional news image
BBC Wales Today 1.2m homes 4.7%
from Cardiff CF5 2YQ, 128km south (186°)
to BBC Wales region - 206 masts.
regional news image
ITV Cymru Wales 1.2m homes 4.7%
from Cardiff CF5 6XJ, 132km south (187°)
to ITV Wales region - 206 masts.

How will the Long Mountain (Powys, Wales) transmission frequencies change over time?

1984-971997-981998-20092009-1331 Oct 2018

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 4 Nov 09 and 3 Dec 09.

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

Analogue 1-4 1000W
BBCA, D3+4, BBCB(-4dB) 400W

Which companies have run the Channel 3 services in the Long Mountain transmitter area

Jan 1958-Jul 1968Television Wales and the West
Jul 1968-Feb 2004Harlech Television
Feb 2004-Dec 2014ITV plc
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Long Mountain 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.

Is the transmitter output the same in all directions?

Radiation patterns withheld

Sunday, 2 January 2011
3:01 PM

How do we swich from long mountan 2 another transmitter with more channels from Montgomery SY15

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Jackie's 1 post GB flag
Jackie's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
Wednesday, 5 January 2011
Roger Callow
9:00 AM

Since Christmas there have been at least three occasions when we have switched on our television set only to see the message "no or scrambled signal".This seems to be happening more and more-can you explain?

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Roger Callow's 1 post GB flag
Thursday, 6 January 2011
Transmitter engineering

6:20 AM

LONG MOUNTAIN transmitter - Freeview BBC Digital TV Off Air from 22:05 yesterday to 22:21 yesterday [BBC]

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Transmitter engineering's 148,786 posts xx flag

8:58 AM

Jackie: The channels you get depends on the direction your aerial points (and also the group of the aerial if it not the wideband type).

However, you are not predicted to be able to receive any additional channels this way. You may need to add Freesat to your system - see All about Freesat | - independent free digital TV advice .

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Briantist's 38,910 posts GB flag
Wednesday, 12 January 2011
Richard Jones

9:55 PM

Roger Callow:

These outages have been occurring ever since LM switched to DVB-T in 2009, but they've been getting more and more frequent. Both MUXes still get broadcast, but they carry no data or programmes. Sometimes one MUX goes blank, sometimes the other, and relatively infrequently both go blank. I've confirmed this on multiple pieces of equipment off two separate aerials.

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Richard Jones's 28 posts GB flag
Thursday, 13 January 2011

5:42 PM

Very interesting.Long Mountain gets its feed from parent transmitter,Blaenplwyf via a microwave link at Llangurig,just wondering whether this is cause of outages.Also are the dependant relays of LM,such as Llandinam affected by these breaks in service.Certainly not a good advert for digital advancement!

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aerialman's 140 posts GB flag
Friday, 14 January 2011

8:39 AM

aerialman: I can't really follow your logic there.

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Briantist's 38,910 posts GB flag

6:47 PM

OK Briantist,lets put it this way,if the punters are watching TV,and then experiencing breaks in service,as they might do using LM Transmitter,then i imagine it is a very frustrating time,particularly in the middle of a favourite programme.As an analogue transmitter did LM experience the same problems? i think not.

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aerialman's 140 posts GB flag
Sunday, 16 January 2011
Richard Jones

11:51 PM

In the years before DSO, LM did suffer from various outages, but typically only one of the channels would vanish at any one time -- the carrier would stop broadcasting. However, it was pretty infrequent, and nothing like as often as the outages post-DSO. As for whether or not it's unique to LM or whether any of the relays (or any of Blaenplwyf's other relays) suffer the same problem, I've no idea.

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Richard Jones's 28 posts GB flag
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