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 29/05/2023 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 not one of the extended Freeview HD (COM7 and COM8) transmitters, it does not provide these high definition (HD) channels: .
If you want to watch these HD channels, either use Freesat HD, or move your TV aerial must point to one of the 30 Full Freeview HD transmitters. For more information see the want to know which transmitters will carry extra Freeview HD? 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)
Are you trying to watch these 0 Freeview HD channels?
The Preseli (Pembrokeshire, Wales) mast is not one of the extended Freeview HD (COM7 and COM8) transmitters, it does not provide these high definition (HD) channels: .
If you want to watch these HD channels, either use Freesat HD, or move your TV aerial must point to one of the 30 Full Freeview HD transmitters. For more information see the want to know which transmitters will carry extra Freeview HD? 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, 1 September 2020
C
Chris.SE10:07 AM
All:
I'm guessing Preseli may be on essential engineering maybe due to the above reports as all TV muxes appeared to go off-air just before 1045. All back on air at time of posting. I note that virtually all its relays are on Planned Engineering with "Possible service interuptions".
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Friday, 4 September 2020
Transmitter engineering
7:28 AM
7:28 AM
PRESELI transmitter - DAB: Reduced quality due to a fault from 13 Aug 23:42 until 13 Aug 23:52. . [BBC]
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Saturday, 5 September 2020
S
Stuart Jones7:26 AM
Tenby
Hi
We are having problems with keeping a signal on our free view box. We are on a caravan site at New Hedges in Tenby SA70 8TR. We have reset numerous times but the picture constantly freezes and goes off regularly to no signal being received.
Our aerial is fitted in the window pointing the same way has all others on the site and I believe this to be the Preseli transmitter.
We have turned off all phones, CD player laptops etc but no improvement.
Could you help in diagnosing the problem.
Many thanks
Mr Jones
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Transmitter engineering
10:28 AM
10:28 AM
PRESELI transmitter - DAB: Reduced quality due to a fault from 13 Aug 23:42 until 13 Aug 23:52. . [BBC] , DAB: Reduced quality due to a fault from 13 Aug 23:42 until 13 Aug 23:52. . [BBC]
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Sunday, 6 September 2020
C
Chris.SE2:18 AM
Stuart Jones:
The predicted transmitter for your location is indeed Preseli which should give you the most reliable signals. The COM multiplexes may be slightly less reliable than the PSBs. The aerial should have its rods horizontal and be pointing at a bearing of 8 degrees (that's east of due N).
You can also receive a number of other transmitters in that location with less releibale signals that may be more variable or poor.
I suggest the first thing to check is that you are tuned to the correct UHF channels for Preseli by going to your set's tuning section, they are C43, C46, C40, C42, C45, C39 in the order BBCA/PSB1, D3&4/PSB2, BBCB-HD/PSB3, SDN/COM4, ArqA/COM5, ArqB/COM6.
You may be able to check best in Manual tuning if you have that option, but you may have others such as Signal Test or similar. (Ignore PSB3 if your set hasn't got an HD/T2 tuner).
If you find you are not tuned to these UHF channels, unplug the aerial and carry out an automatic retune which should clear all previous tuning as nothing should be found. Plug the aerial back in an ideally carry out a manual tune for the correct UHF channels.
If you are tuned to the correct channels, then check your aerial connections and coax plug for any poor or broken connections. Is your aerial a Wideband or Group B suitable for Preseli and does it have a similar number of elements to others there that are receiving satisfactory signals?
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Tuesday, 15 September 2020
Transmitter engineering
1:28 PM
1:28 PM
PRESELI transmitter - DAB: Off the air due to essential engineering from 15 Sep 13:23. . [BBC]
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Transmitter engineering
4:28 PM
4:28 PM
PRESELI transmitter - DAB: Off the air due to essential engineering from 15 Sep 13:23 until 15 Sep 14:32. Off the air due to essential engineering from 15 Sep 13:23 until 15 Sep 14:48. . [BBC]
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Wednesday, 16 September 2020
Transmitter engineering
10:27 PM
10:27 PM
PRESELI transmitter - DAB: Off the air due to essential engineering from 15 Sep 13:23 until 15 Sep 14:32. Off the air due to essential engineering from 15 Sep 13:23 until 15 Sep 14:48. . [BBC] , DAB: Off the air due to essential engineering from 15 Sep 13:23 until 15 Sep 14:32. Off the air due to essential engineering from 15 Sep 13:23 until 15 Sep 14:48. . [BBC]
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Friday, 8 January 2021
Transmitter engineering
7:54 AM
7:54 AM
PRESELI transmitter - DAB: Off the air due to a fault from 8 Jan 03:21 until 8 Jan 03:28. . [BBC] , DAB: Off the air due to a fault from 8 Jan 03:21 until 8 Jan 03:28. . [BBC]
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Monday, 6 September 2021
Transmitter engineering
11:23 AM
11:23 AM
Preseli transmitter - Preseli transmitter: Possible effect on TV reception week commencing 06/09/2021 Pixelation or flickering on some or all channels [DUK]
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