Full Freeview on the Redruth (Cornwall, England) transmitter
Brian Butterworth first published this on - UK Free TV
Google Streetview | Google map | Bing map | Google Earth | 50.210,-5.239 or 50°12'37"N 5°14'20"W | TR16 6QZ |
The symbol shows the location of the Redruth (Cornwall, England) transmitter which serves 97,000 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.
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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 Redruth (Cornwall, England) 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 Redruth 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 Redruth (Cornwall, England) 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 Redruth transmitter?
BBC Spotlight 0.8m homes 2.9%
from Plymouth PL3 5BD, 82km east-northeast (78°)
to BBC South West region - 107 masts.
ITV West Country News (West) 0.8m homes 2.9%
from Plymouth PL7 5BQ, 89km east (79°)
to ITV West Country region - 107 masts.
All of lunch, weekend and 50% evening news is shared with West Country (East)
Are there any self-help relays?
Coverack | Transposer | 15 km S Falmouth | 70 homes |
How will the Redruth (Cornwall, England) transmission frequencies change over time?
1950s-80s | 1984-97 | 1997-98 | 1998-2009 | 2009-13 | 1 May 2019 | ||||
VHF | B E T | B E T | B E T | B E T | K T | ||||
C1 | BBCtvwaves | ||||||||
C32 | ArqB | ||||||||
C33 | ArqA | ||||||||
C37 | C5waves | C5waves | |||||||
C41 | ITVwaves | ITVwaves | ITVwaves | +D3+4 | D3+4 | ||||
C44 | BBC2waves | BBC2waves | BBC2waves | +BBCA | BBCA | ||||
C47 | C4waves | C4waves | C4waves | BBCB | BBCB | ||||
C48 | SDN | SDN | |||||||
C51tv_off | BBC1waves | BBC1waves | BBC1waves | ArqB | |||||
C52tv_off | ArqA |
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 8 Jul 09 and 5 Aug 09.
How do the old analogue and currrent digital signal levels compare?
Analogue 1-4 | 100kW | |
BBCA, D3+4, BBCB | (-7dB) 20kW | |
SDN, ARQA, ARQB | (-10dB) 10kW | |
Analogue 5 | (-15.2dB) 3kW | |
Mux D* | (-16.6dB) 2.2kW | |
Mux 1*, Mux 2*, Mux A*, Mux B*, Mux C* | (-18dB) 1.6kW |
Which companies have run the Channel 3 services in the Redruth transmitter area
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Is the transmitter output the same in all directions?
Radiation patterns withheldMonday, 18 January 2016
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Terry carne8:48 PM
MikeB: so I have come to this post as a result of searching for an explanation for the poor reception that I am experiencing. Exactly as described by mr O'Connot. It appears to me that there is a significant problem with the transmitter. The stations come and go, but right now I can view only those in the first two groups. I live in Newquay. My mother lives in Camborne, and complains of exactly the same problem. In response to mike b's question I suggest that the problem is widespread , and the lack of complaints does not indicate that there is no problem.
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MikeB9:29 PM
Terry Carne: Mr O'Connors original post, you can see that he was missing 2 Muxes, as you say you are, but there are lots of possible reasons for a problem with reception. If the problem has been going on for a long time, then its unlikely to be the transmitter itself. And if you can get the first two mux's, but not the third, then its unlikely to be the strength of the signal, since PSB3 is broadcast at the same strength. There may be a problem that has escaped widespread notice, but the Redruth transmitter covers 97,000 homes. Even if 99% get a perfect signal, thats almost a 1000 homes that have a problem. However, that problem may not be the same problem.
Its worth checking that the transmitter being used is the optimal one - its not uncommon for a set or box to pick up another transmitter, especially if someone has retuned. Next, what is the terrain like - there are some places that are just going to have problems (which is where Freesat might be useful). And then you have to think about what is happening in the persons own house - if the aerial the correct one?, is the system robust?, etc. And is the signal too weak or too strong?
You can put your postcode into the website when you post, and it will give lots of information about possible reception, etc. We need a postcode because simply giving a town is not only hard work, but its also very hazy.
Narrow down the possible cause, and then something can be done.
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Tuesday, 19 January 2016
N
Nigel O'Connor9:30 AM
Camborne
Terry carne: I think if one of the actual engineers sat down and watched the TV in the effected areas they might see there IS an actual problem. I am in Camborne (TR14 8LL) and have totally lost the programs on certain channels, and like you, others are in and out. In my job, I get all over Cornwall and have spoken to many people who watch via the same transmitter and all have reported similar problems. It's been going on for months now, but I guess as usual, we don't matter much in Cornwall!
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Nigel's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
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MikeB9:59 AM
Nigel O'Connor: Can anyone actually describe what 'the problem' is? As I said before, there are lots of possible reasons for poor reception, and many of them will be within a house, not external to it. It needs to be established if there is an actual pattern and common cause, or are they the usual problems that might be expected, but lumped together as 'something is wrong'.
Looking at your location (which is why a postcode is so useful), we can see that your are just 5km from the transmitter. Thats very close, and too high a signal level would not be out of the question - check the signal strength is not too high, because overloading the TV tuner can result in 'no signal', etc.
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Tuesday, 26 January 2016
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Terry carne8:08 AM
Newquay
MikeB: hi mike and thanks for replying.
My post code is tr7 3dw
I have had the same aerial since moving into my house 17 years
17 years ago. It is in the loft
When I wrote my reception had deteriorated to the worst it has been. I had 'no signal' messages on channels 48, 51 and 52. Some days later I had ch 48 back, but pixelating to the extent that it was unwatchable. At the weekend I tried retuning a few times. At 6pm on Sunday the result was all channels working perfectly well. However within the hour I had no signal on channels 51 and 52 again and that remains the situation today.
It is the variable reception, with no change inside my house, that convinces me that the problem lies with the signal I am receiving, for whatever reason
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Terry's: ...
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MikeB9:21 AM
Terry carne: Have you actually checked signal strength on the muxes? If a channel is pixallating, that does not automatically mean the signal is too low (and hence a problem with the transmitter), but its well be too high. Your 27km from the transmitter, (providing your actually using the correct transmitter - retuning does no good, and might actually make things worse) and likely to get an excellent signal. That signal strength will vary slightly (mine does), but if its at the very top of the range, and then peaks, thats when you get a problem.
'No signal' can mean too high, not just too low. If it is too low, check your system. Even an inside aerial can have problems after 17 years - moisture, frayed cables, etc. And although it might be ok (ish) one day, it doesn't mean that problem has gone away.
Have a look back at comments where people insist the problem is the transmitter. In the bulk of cases (outside where a transmitter does have an actual fault or low power), its either that the signal is too high for them, or that the signal is too low, owing to a problem within their own system.
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Wednesday, 27 January 2016
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Terry carne6:36 PM
Camborne
Thank you Mike.
I noticed advice that using a booster could cause problems. I bought one when I began having problems receiving channels a year or so ago. Took it off yesterday, and I had a full set of channels last. I bt and this morning. Fingers crossed that that remains the case.
As I mentioned my mother is in Camborne. TR14 7JJ.
Her reception is worse than mine has been, she was watching bbc1 when I visited last Sunday, and it was breaking up badly. Could her signal be too strong? She has no booster fitted, so if that were possibly the case, what could we do to improve it?
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Terry's: mapT's Freeview map terrainT's terrain plot wavesT's frequency data T's Freeview Detailed Coverage
Thursday, 28 January 2016
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MikeB4:16 AM
Terry carne: See 'too much of a good thing' on this website. Could be too high, could be too low - its always worth a check on signal strength.
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KMJ,Derby12:25 PM
Terry carne: it is worth checking that the tv is tuned to Redruth (C44) rather than a weak signal from Caradon Hill (C28)
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Thursday, 28 April 2016
R
re CBSDrama4:47 PM
CBSDrama is moving today from 74 to 71 which seems to be on COM7/COM8 - thought you might like to update your page... Which Freeview channels does the Redruth transmitter broadcast?
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