Redruth (Cornwall, England) DAB transmitter
 | Google map |  | Bing map |  | Google Earth |  | 50.209,-5.239 or 50°12'34"N 5°14'20"W |
Are there any planned engineering works or unexpected transmitter faults on the Redruth (Cornwall, England) mast?
No problems on any service. 
UK Free TV shows the coverage area for a radio transmitter as a coloured overlay (orange for FM, other colours for DAB) on the grey map. We have computed the coverage by combining the terrain with the official radiation pattern. A single click will select the transmitter to view the coverage for a single site, and a double click goes to a page showing full details. Click on the buttons in the right-hand corner of the map to choose from different frequencies (or multiplexes for DAB).
Local transmitter maps
Redruth DAB Redruth AM/FMFriday, 14 June 2013
signal was non existent again today so i tried a retune, seemed to work.
did the same in the car, vast improvement but signal is still patchy around carnmenellis and penryn university where it was ok before.
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Monday, 17 June 2013
P
Phil10:34 AM
Signal here is again patchy. Goes from strong to nothing quickly. Signal errors on the radio constantly bounce from 35 to 70 plus
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R
Rachel 10:29 PM
I've been having trouble with the dab radio in my car these past 3 weeks or so. I travel to work from Camborne to Truro, I listen to capitol fm (the London transmission on dab) and I never used to have any problems, but now the signal keeps cutting out a lot sometimes losing signal altogether. It seems to be worse in warm sunny weather! Is there a problem in this area? Has the latest 4g mobile phone service effected dab signal? Is there anything I can do about this?
Thanks
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Tuesday, 18 June 2013
S
Simon Van Hear11:44 AM
I've just reported this to the BBC. Initially I contacted DigitalUK as directed but they were pretty useless and directed me back to the BBC!
BBC said it is affecting TR2 to TR12 postcodes and they are still looking at the issue.
I'm pretty sure it coincided with the Retune on the 5th June.
Thanks
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Thursday, 20 June 2013
C
Clive henderson9:43 PM
After many years of excellent DAB reception in Mylor Bridge my reception became very sporadic about 3 weeks ago. I am relieved it's not just me and grateful to Simon for chasing up the problem. Let's hope it is resolved soon
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Friday, 21 June 2013
J
johng10:04 AM
Falmouth
johng: I am keeping a diary for the next week for the man at the BBC; if anyone else wants to give me a %age reception on DAB at 7 am, midday, 4 pm and 8pm, I will pass it on. I score anything below 50% as unlistenable, 90% is occasional breakup. just post it here next Thursday evening with postcode.
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johng's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
Tuesday, 25 June 2013
P
Pete Marshall9:12 AM
Falmouth
Just to reinforce the trend, I'm in Falmouth and as Clive says am finally relieved to discover that others are in the same boat.
If I can find out how to get a %age reception on my radio, I'll collect some info for johng, although I can't promise the 7 am slot.
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Pete's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
It's worth noting that for digital transmission, the way of measuring the quality of the signal is the "bit error rate".
A BER of 1:10,000 (for example) means that one unrecoverable error happened in every 10,000.
The actual signal strength doesn't matter, and is a bit of a misnomer.
If you are seeing a "percentage" bar for signal quality on equipment X, it won't relate to that on equipment Y.
The COFDM system (which DAB uses) pushes multiple copies of the signal over different frequencies (digital subcarriers) - everything on DAB is transmitted twice, in effect.
So, it's only when the receiver is unable to recover a bit from the multiple transmissions is a "bit error" detected.
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P
Pete Marshall9:36 AM
Falmouth
Just did a total retune and can confirm that it seems to be only the BBC stations that are affected. Other stations show just as weak a signal, but do not break up.
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Pete's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Pete Marshall: It's worth noting, as per the table above, that the BBC stations are all carried together in a single transmission, the "BBC National DAB".
If one of these station is affected, they all will be.
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