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 18/11/2024 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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Sunday, 25 March 2012
K
kris11:52 AM
Caerphilly
hello, can you please tell me,if you can;when will we be able to get channel 4 and 5 on freeviw hd via the aerial in Llanbradach cf83 3ny ? can you help with info. THANKS.
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kris's: ...
Thursday, 5 April 2012
kris: Channel 5 HD is not on Freeview yet, Channel 4 HD does not transmit in Wales.
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Tuesday, 1 May 2012
D
d.t.marasco3:13 PM
Hi i have recently fitted a high gain ariel on the roof i have successfully tuned my freeveiw tele to Mynydd Macchen Transmitter so ican recieve the welsh channels,but at certain times of the day (lunch time tea time)in particular theres a lot of interferance resulting in loss picture but only on the welsh channels i would appreciate some advice.kind regards.
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Friday, 18 May 2012
d.t.marasco: Hi. Please can you have a look at the Freeview intermittent interference | ukfree.tv - independent free digital TV advice - but also not the "Transmitter engineering" faults listed here.
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Sunday, 23 September 2012
B
bev hurley7:58 PM
Do you know when Mynydd Machen will be transmitting more freeview channels?
At the moment I have just the basic BBC/ITV/channel 4 & 5 channels
Thanks
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bev hurley: Never.
The Commercial broadcasters (those that don't transmit from Mynydd Machen) achieve coverage of 90% of the population from 81 of the largest transmitters (largest by viewer population). For them to transmit from the other 1,000 plus relays including Mynydd Machen would roughly double their transmission costs whilst only adding a potential 8.5% of the population to their viewer bases. As they operate purely for profit, they wish to acquire as many viewers as possible for least cost which is what they do.
Unless you are in a spot where you can receive the Commercial channels from a full-service transmitter, then you ain't gonna get them. In some parts of South Wales Mendip can be received. If this is possible at your location you may therefore be able to receive the Commercial channels, either by using a separate aerial and separate set-top box or by combining an aerial on Mendip with one on Mynydd Machen. What can be received and can't be received in your area varies over small distances because of the terrain.
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Tuesday, 23 October 2012
C
Clive Porter8:30 AM
What has happened to the Mynydd Machen Channel 23 / BBCA Multiplex this morning? All programs on this multiplex are "dead".
Have the engineers forgotten to turn it back on after their overnight engineering work?
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D
David Badbach8:54 AM
Clive: Yep, I'm in the RISCA area, but luckily I also have FreeSAT, so that's giving me a service. Wake up engineers - please!
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C
Clive Porter12:58 PM
Mynydd Machen Channel 29 ?
Can anyone tell me what has become of the BBCB Multiplex (BBC One HD, BBC HD ITV1 HD etc.) on Mynydd Machen Channel 29?
I used to receive the channel 29 multiplex until around the time of the "re-tune" on 17 October. I've not been able to receive it since that date, maybe earlier as I don't watch HD very often.
I receive channels 23 and 26 from Mynydd Machen perfectly (100% signal 100% quality) but my (full HD) TV shows no signal at all on channel 29.
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Tuesday, 9 April 2013
B
barrie wreford3:21 PM
the problem with the mynydd machen transmitter is the design of the transmitting aerial,if you live close and low down the signal is poor,the further away you are the signal improves.i live about two and a half miles away line of sight in risca on a hill when we have the slightest high pressure i get picture breakup or no signal due to interference from stockland hill.that is with the correct group aerial mounted vertical and pointing at the mast.
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