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Full Freeview on the Redruth (Cornwall, England) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps50.210,-5.239 or 50°12'37"N 5°14'20"Wsa_postcodeTR16 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.

Are there any planned engineering works or unexpected transmitter faults on the Redruth (Cornwall, England) mast?

Redruth transmitter - Redruth transmitter: Possible effect on TV reception week commencing 06/12/2021 Possible Pixelation or flickering on some or all channels Digital tick


Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
_______

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.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 H max
C44+ (658.2MHz)400mDTG-320,000W
Channel icons
1 BBC One (SD) South West, 2 BBC Two England, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 16 others

PSB2
D3+4
 H max
C41+ (634.2MHz)400mDTG-320,000W
Channel icons
3 ITV (SD) (West Country), 4 Channel 4 (SD) South ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 26 ITV4, 30 E4 +1, 35 ITV +1 (West Country),

PSB3
BBCB
 H max
C47 (682.0MHz)400mDTG-620,000W
Channel icons
56 5SELECT, 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV Meridian Southampton), 104 Channel 4 HD South ads, 105 Channel 5 HD, 106 BBC Four HD, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

COM4
SDN
 H -3dB
C48 (690.0MHz)400mDTG-810,000W
Channel icons
12 Quest, 20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 Pop Player, 211 Ketchup TV, 212 YAAAS!, plus 15 others

COM5
ArqA
 H -3dB
C33 (570.0MHz)400mDTG-810,000W
Channel icons
11 Sky Arts, 17 Really, 19 Dave, 31 E4 Extra, 36 pick, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 9 others

COM6
ArqB
 H -3dB
C32 (562.0MHz)400mDTG-810,000W
Channel icons
 FreeSports, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 91 Classic Hits, 235 Aljazeera English, plus 18 others

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
DTG-8 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 Redruth (Cornwall, England) 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 Redruth transmitter?

regional news image
BBC Spotlight 0.8m homes 2.9%
from Plymouth PL3 5BD, 82km east-northeast (78°)
to BBC South West region - 107 masts.
regional news image
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?

CoverackTransposer15 km S Falmouth70 homes

How will the Redruth (Cornwall, England) transmission frequencies change over time?

1950s-80s1984-971997-981998-20092009-131 May 2019
VHFB E TB E TB E TB E TK T
C1BBCtvwaves
C32ArqB
C33ArqA
C37C5wavesC5waves
C41ITVwavesITVwavesITVwaves+D3+4D3+4
C44BBC2wavesBBC2wavesBBC2waves+BBCABBCA
C47C4wavesC4wavesC4wavesBBCBBBCB
C48SDNSDN
C51tv_offBBC1wavesBBC1wavesBBC1wavesArqB
C52tv_offArqA

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

Apr 1961-Dec 1981Westward Television
Jan 1982-Dec 1992Television South West (TSW)
Jan 1993-Feb 2004Westcountry Television
Feb 2004-Dec 2014ITV plc
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only. Redruth was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Is the transmitter output the same in all directions?

Radiation patterns withheld

Comments
Monday, 18 January 2016
T
Terry carne
8:48 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.

link to this comment
Terry carne's 3 posts GB
M
MikeB
sentiment_very_satisfiedPlatinum

9:29 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.

link to this comment
MikeB's 2,579 posts GB
Tuesday, 19 January 2016
N
Nigel O'Connor
9:30 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!

link to this comment
Nigel O'Connor's 4 posts GB
M
MikeB
sentiment_very_satisfiedPlatinum

9:59 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.

link to this comment
MikeB's 2,579 posts GB
Tuesday, 26 January 2016
T
Terry carne
8:08 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

link to this comment
Terry carne's 3 posts GB
M
MikeB
sentiment_very_satisfiedPlatinum

9:21 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.

link to this comment
MikeB's 2,579 posts GB
Wednesday, 27 January 2016
T
Terry carne
6:36 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?

link to this comment
Terry carne's 3 posts GB
Thursday, 28 January 2016
M
MikeB
sentiment_very_satisfiedPlatinum

4:16 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.

link to this comment
MikeB's 2,579 posts GB
K
KMJ,Derby
sentiment_satisfiedGold

12:25 PM

Terry carne: it is worth checking that the tv is tuned to Redruth (C44) rather than a weak signal from Caradon Hill (C28)

link to this comment
KMJ,Derby's 1,811 posts GB
Friday, 29 January 2016
Transmitter engineering
sentiment_very_satisfiedOwner

4:32 AM

REDRUTH transmitter - Freeview: BBC Digital TV Weak Signal from 02:27 today. [BBC]

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Transmitter engineering's 138,015 posts xx
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