Freeview Light on the Mynydd Machen (Caerphilly, Wales) transmitter
 | Google map |  | Bing map |  | Google Earth |  | 51.604,-3.123 or 51°36'13"N 3°7'24"W |  | NP11 7PS |
The symbol shows the location of the Mynydd Machen (Caerphilly, Wales) transmitter which serves 31,000 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 Mynydd Machen (Caerphilly, Wales) mast?
Mynydd Machen transmitter - Mynydd Machen transmitter: Possible effect on TV reception week commencing 11/11/2024 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.
H/V: aerial position (horizontal or vertical)
The Mynydd Machen (Caerphilly, Wales) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: U&Yesterday, 4seven, 5Action, 5STAR, 5USA, Al Jazeera Eng, Al Jazeera English, Blaze, Blaze +1, Challenge, Channel 5 +1, DMAX, E4 Extra, YAAAS!, Film4 +1, Food Network, FRANCE 24 (in English), GREAT! action, GREAT! christmas, GREAT! movies, 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, That's 90s, That's TV 2, Together TV, TRUE CRIME, TRUE CRIME XTRA, U&Dave, U&Dave ja vu, U&Drama +1, U&W.
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 Mynydd Machen 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.
| Mux | H/V | Frequency | Height | Mode | Watts |
| PSB1 BBCA | V max | C23+ (490.2MHz) | 411m | DTG- | 400W |
 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 | |||||
| PSB2 D3+4 | V max | C26+ (514.2MHz) | 411m | DTG- | 400W |
 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), 71 That’s 60s, | |||||
| PSB3 BBCB | V max | C29+ (538.2MHz) | 411m | DTG- | 400W |
 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 | |||||
Are you trying to watch these 44 Freeview channels?
The Mynydd Machen (Caerphilly, Wales) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: U&Yesterday, 4seven, 5Action, 5STAR, 5USA, Al Jazeera Eng, Al Jazeera English, Blaze, Blaze +1, Challenge, Channel 5 +1, DMAX, E4 Extra, YAAAS!, Film4 +1, Food Network, FRANCE 24 (in English), GREAT! action, GREAT! christmas, GREAT! movies, 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, That's 90s, That's TV 2, Together TV, TRUE CRIME, TRUE CRIME XTRA, U&Dave, U&Dave ja vu, U&Drama +1, U&W.
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 Mynydd Machen transmitter?
BBC Wales Today 1.2m homes 4.7%
from Cardiff CF5 2YQ, 14km south-southwest (213°)
to BBC Wales region - 206 masts.
ITV Cymru Wales 1.2m homes 4.7%
from Cardiff CF5 6XJ, 19km southwest (215°)
to ITV Wales region - 206 masts.
How will the Mynydd Machen (Caerphilly, Wales) transmission frequencies change over time?
| 1984-97 | 1997-98 | 1998-2010 | 2010-13 | 15 May 2019 | |||||
| A K T | A K T | A K T | A K T | A K T | |||||
| C23 | ITVwaves | ITVwaves | ITVwaves | +BBCA | BBCA | ||||
| C26 | BBC2waves | BBC2waves | BBC2waves | +D3+4 | D3+4 | ||||
| C29 | C4waves | C4waves | C4waves | +BBCB | BBCB | ||||
| C33 | BBC1waves | BBC1waves | BBC1waves |
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 3 Mar 10 and 31 Mar 10.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-4 | 2kW | |
| BBCA, D3+4, BBCB | (-7dB) 400W |
Which companies have run the Channel 3 services in the Wenvoe transmitter area
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Tuesday, 9 April 2013
barrie wreford: Can you not use the Risca relay, or even Wenvoe which would probably give you the full service?
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Friday, 12 April 2013
B
barrie wreford5:16 PM
hi dave,signals from risca tranmitter here are non exsistant as a hill in the way and kings weston hill is too strong eg set top aerial upstairs gives good pics.after switchover i was on wenvoe but a coppice of very large trees have grown taller and made viewing very bad especially in windy weather despite antiference group b xg9 on 12ft pole.i pick up coms bbc and and itv west by an aerial pointing at mendip and diplexed [triax a-e unit.many thanks barrie
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Tuesday, 13 August 2013
CF83 2SS
Usually excellent freeview signal from set top aerial but nothing this morning even after resetting box. Tried re-installation and it only picked up 9 channels, (no BBC channels at all), presumably from a different transmitter as the signal is very poor.
Is there a fault with this transmitter today please?
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K's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
Wednesday, 14 August 2013
K Wright: The posting above says that Mynydd Machen was off air yesterday for a couple of hours.
BBC services should be tuned to UHF channel 23, this information is usually given on the signal strength screen.
C49 is Mynydd Bach, C60 is Abertridwr and C41 is Wenvoe.
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Tuesday, 10 December 2013
N
Nathan Abraham8:14 PM
Newport
Transmitter engineering: I live in Cross Keys, Wales; main transmitter is Myndydd Machen; use Freeview. Since Sunday evening, I have lost all of my Freeview HD channels. All other non-HD channels work fine. Does anybody know what is going on??
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Nathan's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
Sunday, 4 September 2016
L
Len Colucci9:30 AM
Transmitter engineering: Is machen transmitter currently off air.We have had no signal since yesterday..All TV have no signal.have checked aerial input direct to main TV by passing splitter for other TVs..many thanks
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Saturday, 3 March 2018
C
Cheryl5:07 PM
Transmitter engineering: no transmition in Rhymney are. When cam
it be expected to resume
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Wednesday, 6 June 2018
C
Ceri Pugh6:55 PM
Newport
Lost ITV in the NP11 7EJ Area from Mynydd Machen at around 17:30
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Ceri's: mapC's Freeview map terrainC's terrain plot wavesC's frequency data C's Freeview Detailed Coverage
Thursday, 11 October 2018
B
Barrie Wreford12:03 PM
Have been getting very intermittent sound dropouts only lasting for a fraction of a second on BBC Wales hd only, has anybody else noticed this problem on Mynydd Machen transmitter or any of its relays.regards Barrie from Risca.
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Friday, 12 October 2018
MikeP
10:36 AM
10:36 AM
Barrie Wreford:
Please provide a full post code so we can examine the predicted reception conditions at your location. Then we can determine whether there are any known faults at whichever transmitter yiou are using.
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