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 04/11/2024 Pixelation or flickering on some or all channels 
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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
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Tuesday, 17 January 2012
Mike Angle: Channel 4 HD is not provided in Wales on Freeview HD, only on Freesat HD.
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Wednesday, 14 March 2012
M
Mr. J. White11:39 AM
Whitland
I am disappointed to find there is no English channe4HD in Wales. I switched to digital long before the switch over in my area so that I could get English channel 4 which I have enjoyed for many years,I cannot understand why this segragation is back in place. I moved to Wales but do not speak welsh, many Welsh people dontspeak welsh either, so I fail to see why we cannot receive the English channel4HD. Are there any plans to change this, or can I contact someone to voice my opinion. Thank You
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Mr.'s: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Mr. J. White: S4C has the right to a HD slot in Wales, as the law provides for this and Ofcom have to implement the law.
If you want to watch Channel 4 HD you will need to use Freesat.
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M
Mike Dimmick2:41 PM
Mr J. White, Briantist: No, the BBC B capacity-reservation scheme is national, not regional. While "The Television Multiplex Services (Reservation of Digital Capacity) Order 2008" allows Ofcom to specify different areas of the British Islands in each application process, in practice they have so far only advertised for services covering the whole of the British Islands.
References: The Television Multiplex Services (Reservation of Digital Capacity) Order 2008 section 3(3)(b)(ii) and http://stakeholders.ofcom….pdf section 2.30.
In response to the first invitation to apply, Channel 4 made a joint application with S4C in which they agreed that S4C would serve Wales, and Channel 4 would serve the rest of the UK: http://stakeholders.ofcom….pdf . This is the legal basis on which Channel 4 HD and S4C Clirlun are running. S4C Clirlun does not, individually, have a Digital Television Programme Service licence - it is part of the Channel 4 HD DTPS licence. (DTPS and Digital Television Additional Services, DTAS, licences are listed at Ofcom | Digital TV Channels .)
Channel 4 were actually under no obligation to make this offer to S4C, they could have applied for a nationwide service. (Equally, so could S4C have applied for a nationwide service.) That is in contrast to ITV plc, who were effectively required to collaborate with STV plc, UTV Media plc and Channel Television, because the Order requires that any application from "Channel 3" companies represents at least 13 regional licensees. ITV plc owned (at the time) 11 regional licences and one national licence, STV plc owns two, UTV Media plc owns one, and Channel Television owned one. Since then, ITV plc have bought Channel Television, but that still leaves them one short.
In that first application, there were two slots available, and potentially four applicants: the ITV companies, Channel 4, S4C and Channel 5. C4 may have decided to invite S4C to join to improve the strength of their own application. The other companies were entitled to not just apply for an HD version of their traditional analogue service, but also for any new service, whether or not an HD version of any existing service, so had they been able to agree on it, the ITV companies could have submitted a second application to run ITV2 HD, for example.
Of course Channel 4 may have been 'encouraged' to offer the capacity to S4C, it may not have been entirely their choice!
I believe that if Channel 4 proposed to later drop S4C Clirlun, that would fall under section 19(3C) of the Broadcasting Act 1996 (inserted by section 7(3) of the Order). I think it's likely that Ofcom would decide that the variety of services was 'unduly diminished' - though I could be wrong, Ofcom have permitted Capital Radio and Heart to turn their accreted collections of independent local radio licences into national networks.
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Friday, 27 April 2012
O
Owen Hesford9:51 AM
Newcastle Emlyn
SA38 9JH
Why are Tx,s radiation paterns with held and not in the public domain??We at Newcastle Emlyn receive our terestial tv from the relay mast at Llandfriog which in turn receives the tv signal from the Perseli mast.It is proposed to site a wind farm at Llandfriog in line between the two masts. This I feel will cause untold tv signal problems for the community.CAN you please comment on this? Thankyou
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Owen's: mapO's Freeview map terrainO's terrain plot wavesO's frequency data O's Freeview Detailed Coverage
M
Mike Dimmick5:02 PM
Owen Hesford: The owner of this website, Brian Butterworth (Briantist), has asked the BBC several times for the radiation patterns. Their most recent response is at Update on transmitter radiation patterns (BBC FOI request) | ukfree.tv - independent free digital TV advice .
For the frequencies used by Llandyfriog, we have actually told the international community that we will be broadcasting on them from Blaenplwyf (near Aberystwyth) at 40 kW. We are using them at Blaenplwyf, but only at 10 kW, so we can reuse them at a number of other sites in west Wales: see UK TV Frequency map - channel C22 (482.0MHz) before switchover map | ukfree.tv - independent free digital TV advice for the map. If Ireland were to officially discover that we weren't really using them to the extent we negotiated for, it might cause problems when renegotiating.
As for your wind farm, Llandyfriog currently uses a single log-periodic antenna to receive the signal from Presely. I would expect that use of trough antennas or arrays of logs, and/or diversity reception, should overcome any reduction of signal level. If all else fails, the data can be delivered to the relay site via fibre-optic cable rather than off-air, although this imposes an additional cost to the broadcasters.
The National Planning Policy Framework says, in section 44, "Local planning authorities [...] should ensure that [...] they have considered the possibility of the construction of new buildings or other structures interfering with broadcast and telecommunications services." The local authority could insist that the wind farm operator pays for any work required to restore broadcasting, if it does cause enough of a problem.
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Sunday, 17 June 2012
R
Robert Elliott11:30 PM
For the past 4 days my DAB radio has been very erratic on FM and displaying NO SIGNAL on DAB, is this due to works on the Preselli transmitter or do I have to get my radio fixed?Thank you.
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Tuesday, 17 July 2012
T
Tom11:35 PM
Hi
I live on the east coast of Ireland In the last few weeks I have lost all signal on channel 42 only all other muxes working fine. I have checked for single channel interference and found nothing wrong. It is also not caused by the weather. Any ideas?
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Tuesday, 7 August 2012
K
ken owen11:43 PM
Goodwick
Would an indoor ariel work in the attic to allow viewing of freeview hd in 5 precelly crescent, goodwick, sa64 0ba
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ken's: ...
Wednesday, 8 August 2012
ken owen: If the question is in relation to an aerial already fitted in the loft one which is known to work for standard definition channels then it will be expected to receive HD channels as well. Difficulties picking up HD don't usually arise where standard definition Public Service channels (BBC, ITV1, S4C, C4 etc) can be received.
The post code for Precelly Crescent is different to that which you supplied, it being SA64 0HE. The only way to determine whether something can be received is to try it. Prior to doing this only an assessment of what the likelihood of success might be by assessing potential difficulties such as obstructions.
Lofts aren't necessarily ideal, although in some places aerials in lofts can work. I'm not entirely sure you can be that an aerial in the loft might work. I would suggest that it won't work if you have to point the aerial through the loft-space of a neighbour. The direction to the transmitter appears to along the line of the properties. That said, the road is on a slope, so it might be possible to see over neighbouring properties.
This appears to be in a good signal area. What makes me think this is the prediction from Digital UK and the fact that there is a 10-element (regular size) aerial under the eaves on one of the houses (as shown on Streetview).
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Dave's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
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