Full Freeview on the Preseli (Pembrokeshire, Wales) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 51.944,-4.661 or 51°56'38"N 4°39'40"W |  | SA41 3QR |
The symbol shows the location of the Preseli (Pembrokeshire, Wales) transmitter which serves 57,000 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.
Are there any planned engineering works or unexpected transmitter faults on the Preseli (Pembrokeshire, Wales) mast?
Preseli transmitter - Preseli transmitter: Possible effect on TV reception week commencing 11/11/2024 Screen may go black on some or all channels 
_______
Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
The Preseli (Pembrokeshire, Wales) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .
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 Preseli 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.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
The Preseli (Pembrokeshire, Wales) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .
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 Preseli transmitter?
BBC Wales Today 1.2m homes 4.7%
from Cardiff CF5 2YQ, 111km east-southeast (118°)
to BBC Wales region - 206 masts.
ITV Cymru Wales 1.2m homes 4.7%
from Cardiff CF5 6XJ, 110km east-southeast (120°)
to ITV Wales region - 206 masts.
Are there any self-help relays?
| Abergynolwyn | Active deflector | Gwynedd | 84 homes |
| Caerberllan | Active deflector | ||
| Cwmtydu A/d | Active deflector | 17 km NNE Newcastle Emlyn | 10 homes 50 caravans |
| Drefelin | Active deflector | 20 km NNW Carmarthen | 36 homes |
| Poppit Sands | Active deflector | 39 km NE Carmarthen Caravan Park | |
| Rhyd-yr-onnen | Active deflector | 20 km N Aberystwyth | 20 homes caravan site |
How will the Preseli (Pembrokeshire, Wales) transmission frequencies change over time?
| 1962-80s | 1984-97 | 1997-98 | 1998-2009 | 2009-13 | 2013-18 | 2013-17 | 31 Oct 2018 | ||
| VHF | B E T | B E T | B E T | W T | K T | K T | K T | ||
| C8 | ITVwaves | ||||||||
| C30 | _local | _local | _local | _local | |||||
| C37 | C5waves | C5waves | |||||||
| C39 | +ArqB | +ArqB | ArqB | ||||||
| C40 | BBC2waves | BBC2waves | BBC2waves | +BBCB | +BBCB | BBCB | |||
| C42 | -SDN | -SDN | -SDN | SDN | |||||
| C43 | ITVwaves | ITVwaves | ITVwaves | +BBCA | +BBCA | +BBCA | BBCA | ||
| C45 | -ArqA | -ArqA | -ArqA | ArqA | |||||
| C46 | BBC1waves | BBC1waves | BBC1waves | +D3+4 | +D3+4 | +D3+4 | D3+4 | ||
| C49tv_off | +ArqB | ||||||||
| C50tv_off | C4waves | C4waves | C4waves | +BBCB |
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 1-5 | 100kW | |
| BBCA, D3+4, BBCB | (-7dB) 20kW | |
| SDN, ARQA, ARQB | (-10dB) 10kW | |
| Mux A*, Mux B* | (-17dB) 2kW | |
| Mux 1*, Mux 2*, Mux C*, Mux D* | (-20dB) 1000W |
Which companies have run the Channel 3 services in the Preseli transmitter area
|
|
Tuesday, 13 November 2012
D
David of Adpar6:25 PM
Newcastle Emlyn
I've lost all my Com 6 channels since the retune at the beginning of November. Digital UK says I should not have been receiving them anyway, but I was and am really disappointed to lose them on the retune. I see that there are current engineering works to the Preseli mast, I hope this will mean that the missing channels will return.
| link to this comment |
David's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
Friday, 27 September 2013
J
john morgan7:57 PM
Is anybody having a low signal quality tonight from preseli, my HD channels are down to 3 out of 10?
| link to this comment |
Saturday, 20 September 2014
R
rob summons4:03 PM
Having problems since retuning on 3.9.14 as instructed. Freeview cutting out in the evening. Try to retune nothing found. Live in Rosemarket at sa731jh.
| link to this comment |
Thursday, 12 March 2015
M
M Davies2:24 PM
Transmitter engineering: Is com 5 off air today 12/03/15 Preseli?
| link to this comment |
Dave Lindsay
3:48 PM
3:48 PM
M Davies: See:
Digital UK - Planned Engineering Works
Preseli: "Possible service interruptions"
| link to this comment |
Sunday, 10 May 2015
D
D,Sopher9:17 PM
Llanybydder
My post code is SA40 9RE, Llanybydder, Carmarthenshire, the house being about 800 ft above sea level. Reception for some channels, ITV 1,2,3,4, and freeview 19, 20,37 is poor or interrupted (loss of sound, breaking up picture, message saying no signal) IN WINDY WEATHER ONLY. BBC channels on the other hand seem unaffected. Could this be down to the my aerial (indoor, on window sill), or the presence of the BT telephone cable (extending from this side of the house to the telegraph pole to the west)which swings in heavy winds. Or is it because these channels come from different transmitters? Would getting an outdoor aerial fitted to house wall in a much higher position than the indoor aerial downstairs? I don't have an HD TV. I would be grateful for some suggestions to help remedy this problem which seems to be due to weather conditions. With thanks, DS.
| link to this comment |
D,Sopher's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
Monday, 11 May 2015
Dave Lindsay
12:40 PM
12:40 PM
D,Sopher: The short answer is yes, a roof-top aerial will likely improve reception quality, although it's possible that you may never achieve stable reception all the time, particularly of the Commercial (COM) channels.
There are some points you should be aware of - the long answer, if you will:
The terrestrial transmitter network post-switchover is a two-tier one with low power "filler in" transmitters only carrying Public Service (PSB) channels. An explanation of the reasons for this is here:
Londonderry (Northern Ireland) Freeview Light transmitter
In a situation such as yours where the inferior-coverage COM4-6 channels are inferior in terms of availability/reception (as against the PSBs) you may need to go further, such as use a roof-top aerial, or you may never achieve stable reception at all times on those channels.
Digital UK has published a list of all Freeview services here:
Digital UK Industry - Channel listings
COM7 and COM8 are the new quasi-national multiplexes carrying extra HD services, but these will not be available to you, even if you had a HD receiver.
Each multiplex or "mux" is a single signal. Thus, focus on one service from each multiplex.
UHF channel numbers (broadcast channels) are as follows for each transmitter:
PSB1 - BBC One | MP=C49 | P=C43
PSB2 - ITV | MP=C58 | P=C46
PSB3 - BBC One HD | MP=C54 | P=C40
COM4 - ITV3 | P=C42
COM5 - Pick | P=C45
COM6 - 4Music | P=C39
Transmitter abbreviations: MP=Mynydd Pencarreg; P=Preseli
The signal strength screen should tell you which UHF channel ("C") you are tuned to. As I say, look at one service per mux, the first of each being given above.
If you have poor reception of PSB2 (ITV, Channel 4, Channel 5 etc) then maybe it's tuned to Preseli and the good reception of PSB1 is because it's on Mynydd Pencarreg. Using the latter for PSB2 may achieve better reception and you may achieve this by either manual tuning or unplugging the aerial for the earlier part of the scan. If the automatic tuning scan only gives percentage then have it unplugged until, say 55%.
The following are terrain plots for each transmitter to your location:
Preseli:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
Mynydd Pencarreg:
Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location
As you can see, you don't have line-of-sight with either, and so are having to rely on the effect of signal the bending around obstructions (signals travel in straight lines). So you may be lucky to get anything approaching a stable signal from an indoor aerial!
If you have some channels tuned to one transmitter and some to the other then they are each in almost opposite directions, so depending on the way your window faces you might be facing away from at least one of the transmitters! And for Preseli your aerial should be set horizontally and for Mynydd Pencarreg it should be vertical, for best possible reception.
| link to this comment |
Wednesday, 22 July 2015
A
Alan York 7:30 PM
Haverfordwest
At the moment ,unliKe in the past , I can only find listed channels via the channel guide on my remote for BBC TV and radio . Please tell me how to get all the other free view channels , which I had no trouble getting until recently . My post code is sa62 6rf , I live in St David's .
| link to this comment |
Alan's: ...
Thursday, 23 July 2015
J
jb3812:52 AM
Alan York : If by "other channels" you are meaning those such as ITV / Ch4 or Ch5? then carry out a reset on whatever you are using followed by a normal retune, if though on the other hand you are referring to such as ITV3 / Pick TV etc?, then you are (or were) possibly receiving them from the Preseli main station transmitter @ 26 miles / 83 degrees / aerial horizontally mounted, albeit that the DUK reception predictor indicates that reception in the post code area supplied is not possible from anywhere other than from the St Davids relay, (a few hundred yards away on a bearing of 351 degrees) this possibly being down to the line-of-sight signal from Preseli suffering from an obstruction at just under 1 mile away from your particular location.
The only reason for mentioning the latter (Preseli), being that a Google earth check revealed a small number of aerials in your area pointing in the direction of Preseli.
| link to this comment |
Select more comments
Your comment please