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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, 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 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

Monday, 17 January 2011
Richard Jones

11:20 PM

All five go off at the same time, and come back on the same time when the problem is resolved. I have 3 TVs, one fed off a Philips DVT-B box and sharing the same aerial with a Goodmans IDTV (the 80% signal device), and a Panasonic IDTV downstairs fed off a separate aerial. The problem usually lasts 5-10 mins or so, during which time I turn all three on, turn the volume up, tune to the same channel, and keep an eye and ear on them until the signal returns. It's fairly obvious when it does as I then hear each TV, and check I get a picture. I then turn off two I don't need, and carry on watching, usually on the old Ferguson while I do some PC time. As to times of day, I only notice it in the evenings and at night, as that's when I most typically watch TV, but it has happened during the day as well.

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Richard Jones's 28 posts GB flag
Tuesday, 18 January 2011

6:16 AM

Richard Jones: Did you say that the problem used to happen to you analogue services in the past?

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Briantist's 38,915 posts GB flag

6:39 AM

I note that Airwave have, at Long Mountain, a macrocell TETRA transmitter (at 17dbW) in the 400MHz range.

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Briantist's 38,915 posts GB flag

6:43 AM

(For the record there is also Orange GSM, 27.5dBW, 1800MHz; Vodaphone GSM, 23.6dBW, 900MHz; 3G 3, 24.46dbW, 2100MHz; TMobile GSM, 30dBW, 1800MHz, O2 GSM, 22dBW, 900MHz).

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Briantist's 38,915 posts GB flag
Richard Jones

6:52 PM

I know. Airwave uses a separate mast. I go walking around that area quite a lot.

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Richard Jones's 28 posts GB flag
Richard Jones

8:23 PM

"Did you say that the problem used to happen to you analogue services in the past?"

Sometimes, but very infrequently. What used to happen was that the carrier would drop -- I'd know this because my VCR for a start would complain about it. Typically only one channel would go, I think BBC2 was the worst. The other three would carry on transmitting as normal and with no degradation of picture or audio quality. Video dropped off BBC1 one evening, but audio carried on as normal as if nothing happened. Again, confirmed on multiple piece of equipment off separate aerials.

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Richard Jones's 28 posts GB flag

8:42 PM

I believe that Richard Jones has successfully explained the ever present problem at LM,which is the possibility that the off air feed from Blaenplwyf via micro wave link at Llangurig to LM is not a constantly good feed.
I also saw at first hand the example given above on LM on analogue.
For me,rather than just dismissing this condition,somebody has to prove this otherwise.

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aerialman's 140 posts GB flag
Richard Jones

11:23 PM

Llangurig SHF: I've got something in the back of my mind trying to remind me about this, possibly a conversation I had with someone at Crown Castle some years ago. A dish not always in correct alignment? It was a long time ago, but something might pop back in my memory.

Touch wood, LM has been reliable since the major outage at the beginning of the year. That's not to say it hasn't happened again, but I haven't observed that it has.

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Richard Jones's 28 posts GB flag
Wednesday, 19 January 2011
1:09 AM

Long Mountain was regarded as a relay of Blaenplwyf until shortly before switchover of the Long Mountain Tx group when it became an 'Island Site' and was line fed via BT circuitry more than likely via Wenvoe as it's SIPSI transmitter. The regions switched at separate times so program feeds would of had to have been changed months in advance of switchover, of course Mux1 could have been taken off DSAT. Digital UK confirm that Long Mountain was attributed Line Fed and became a parent in it's own right.

"Before switchover, Long Mountain is technically a relay of Blaenplwyf but at switchover, it becomes line-fed"

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Sam's 9 posts GB flag
Thursday, 20 January 2011
Richard Jones

6:44 PM

I spoke too soon. PSB2 fell off air 18.41. PSB1 working fine. Digibox complains "No programme specific information," no Network or Provider showing up on Channel Information. Signal strength 25dB, 100%, Signal quality 0.00e+00 100%. Back on air 18:44.

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Richard Jones's 28 posts GB flag
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