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C21 (474.0MHz) after switchover

The map below shows all the transmitters in the UK using C21 once digtial switchover is complete. Please click the icon to see the coverage area, and double click for more information.

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What do the map symbols mean?

 COM4/SDN multiplex,  COM4/SDN multiplex,  COM5/ArqivaA multiplex,  COM6/ArqivaB multiplex,  PSB1/BBCA multiplex,  PSB1/BBCA multiplex,  PSB2/Digital 3+4 multiplex,  PSB2/Digital 3+4 multiplex,  PSB3/BBCB/Freeview HD multiplex,  PSB3/BBCB/Freeview HD multiplex,  Saorview multiplex 1,  Saorview multiplex 1.

Before switchover

Click on a selection to see the use of the frequency use before switchover:

C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65 C66 C67 C68

Switchover complete

Click on a selection to see the use of the frequency use when switchover is complete:

C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 * * * * * *

Monday, 8 August 2011
Tuesday, 9 August 2011
KB Aerials Sheffield

7:42 AM

You say you have been up to the attic and the aerial is on !
by this I assume you mean that you have an amplifier up there and there is a light on it
theres a few reasons that the aerial could have failed
first things first - ask your neighbours to see if any one has had similar experience at the same time as you - ie no signal

if so then its a localised occurrence

- if the neighbours are telling you that there tv's are working then its obviously a fault with your system and you need to narrow the fault down to where the problem lies
this can be difficult without the correct equipment though so you may have to bear with me the stages I would go through to establish a fault would be

1 - have a look at the aerial - look down the mast is there a box on it - if there isnt skip to next paragraph -the box could be various colours and the colour doesn't usually denote much as different manufacturers make different coloured boxes - if there is a box there it is more than likely a mast head amplifier - and the box in the attic with a light on is a power supply feeding the mast head amplifier - if this is the case you need to know if the power supply is outputting any power to the mast head amp - use a cheap multimeter to check the input of the power supply for 12 volts - if it is outputting powet then its probably the masthead amp thats failed - you need a professional in to replace it

2 disconnect the aerial cable from the amplifier look at teh colour of the braid it should be either bright copper or silver coloured if its Black this indicates water ingress while holding your hand out in front of the cable whip the aerial lead in front of your hand did any water come out - if so you need someone in possibly to replace A, the cable, B the cable and the aerial, C the aerial the cable and the amplifier depending on the amount of damage

3 if there is no obvious signs water if there is no box on the mast then the aerial probably comes direct into the amplifier
take a tv up into the attic disconnect the aerial at the amplifiers input and connect direct to the tv - is there a signal?- if yes the amplifier probably needs replacing - find an aerial shop in your local area that has a trade counter and see if they will sell you a replacement like for like amplifier try not to use the diy sheds etc as i tend to find they carry cheap crappy amps at increased prices a shop that is dedicated to aerials is far better and you could probably tap the guy on the counter for some advice

if you get nowhere im sorry but you need someone like my self in to establish fault I would charge £45-£55 to come out and fault find plus parts - and im sorry to say expect this to go up if they have to grab the ladders off and go on the roof - the reason for this is because of the risk they take working at height

Keith KB Aerials


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KB Aerials Sheffield's 274 posts GB flag
Wednesday, 10 August 2011
8:08 PM

hi i had over 70 freefriew chanels until yesterday when i rescanned as had lost the 1tvs and channel 4s and now have none at all i have tried time again rescanning and it finds 0 channels i have a samsung le40b550 my wifes doing her nut now cos only have the 4 anologue ones upstairs now :(

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tony's 1 post GB flag
tony's: mapT's Freeview map terrainT's terrain plot wavesT's frequency data T's Freeview Detailed Coverage
Tuesday, 23 August 2011
9:31 AM


I have just purchased a television with freeview built in and have managed to obtain most of the freeview channels apart that is from the 2 channels i watch most BBC1 & BBC2. How do i get these channels please ?
I live in Malvern Worcestershire

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Robert's 1 post GB flag
david chandler
10:27 AM

hi all has anybody any idea why i cannot get a signal for itv channels untill aprox 6pm at night. i have a hd recordert and a new tv, all other channels are perfect.

ps i live in banbury oxon.

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david chandler's 2 posts GB flag
Wednesday, 24 August 2011
mr b smith
6:36 PM

having trouble tuning my vcr panni to receive bbc2 . been successful tuning other 4 chans. i have a digital aerial into the vcr and then to my digital ready tv which has freeviev . Do you have any solutions?

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mr b smith's 2 posts GB flag
Mike Dimmick

7:19 PM

mr b smith: Are you using the Waltham transmitter or one of its relays? This transmitter no longer transmits BBC Two analogue. Next Wednesday, all the remaining analogue channels from this transmitter will close down for good.

You can no longer tune in a VCR in the same way after switchover. You need to use a set-top box to decode the digital signal, and have the set-top box select the channel you want to record at the time you want the recording to start. Check your VCR's manual for how to get it to record from a SCART input. If it can't, or you can't work it out, you need a set-top box with an RF modulator, which you can then tune the VCR into.

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Mike Dimmick's 2,486 posts GB flag
Saturday, 3 September 2011
8:48 AM

Hi, i can tune to digital TV channels fine with my TV. But when i try with my new PVR it doesn't find any channels. I have tried with three different brand new PVR's so it could, but highly unlikely, be those. Has anybody experienced this?



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Stuart's 1 post GB flag
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