Menu buttonMENU    UK Free TV logo Radio



Click to see updates
To join, leave or change updates by email, enter your email address here:

Wrotham (Kent, England) analogue radio transmitter

sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps51.320,0.288 or 51°19'13"N 0°17'15"E

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).

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

No problems on any service. BBC

map is loading, please wait...

What do the map symbols mean?

 FM/AM radio mast.

Other local maps

Wrotham DAB Wrotham AM/FM DAB in Kent AM/FM in Kent

Sunday, 12 January 2014
Richard Davis
8:22 PM

What Alex says would be true if the horizontal and vertical components of the signal were transmitted exactly in phase with each other. In that situation, the net result is a signal which is "slant polarised", ie.its plane of polarisation is at 45 degrees, and so you'll get the strongest signal if your receiving dipole is also at 45 deg - as Alex implies, the signal received by either a vertical or horizontal dipole will be 3dB lower in strength. However, this assumes that the dipole is offset from the horizontal or vertical by 45 degrees in the same direction as the radiation produced by the transmitter (eg clockwise) - if you offset it by 45 deg in the other direction (eg anticlockwise) you'll get nothing! Thus you're still in the situation where the received signal strength varies with the orientation of the receiving aerial.
To get round this, most BBC transmitter sites (certainly all the main ones and also many of the low power repeaters) use an aerial configuration which produces circular polarisation. This is acheived by delaying the feed to one section of the aerial relaive to the other so that the horizontal and vertical components are 90 deg out of phase with each other, resulting in a signal whose plane of polarisation rotates, making one 360 deg rotation per cycle. This means that a dipole aerial with any orientation (horizontal, vertical or slant at any angle) will receive the same signal strength. That strength, however, will be 3dB less than would be received by a dipole receiving a plane polarised trnsmission of the same power so, as KMJ says, the present 250kW transmitters are giving approximately the same effective signal strength as the 120kW horizontally polarised ones they replaced.

link to this
Richard Davis's 26 posts Bronze Bronze GB
Monday, 3 November 2014
R Redemer
11:03 AM

I understand that Wrotham is the transmitter for FM radio for Bracknell. Up until a few days ago I could receive Radio 4 on FM perfectly well. But suddenly I cannot receive it at all on FM. All I get in the waveband and surrounding is electronic "music". There is no Radio 4 - even in the background. I can s till receive it on LW, but the reception is not so good, and the programs are different..

I would be grateful for any information on this.
Thank you
Roberta Redemer

link to this
R Redemer's 2 posts GB
R Redemer
11:04 AM

Sorry, I forgot to say that on FM I can get all the other stations.


link to this
R Redemer's 2 posts GB
Sunday, 9 November 2014
Richard Davis
11:38 AM

Hi, Roberta,

It sounds as if a pirate radio station may have opened up from a location very close to you. Unfortunately, if this is the case it's difficult to deal with, as the pirate station certainly won't reveal their location, and won't care in the least that they're causing you problems! The thing to do in the first instance is to check with your neighbours and see whether they also have problems, which seems quite likely. You can then put in a complaint to The Radio & Television Investigation Service via their website at Radio & Television Investigation Service - hopefully, they will be prepared to investigate for you and, if you're lucky, close the pirate down. However, a quicker though more expensive solution would be to buy a DAB radio. They're now quite cheap - the transmissions they receive are on a completely different waveband from FM, so won't suffer the interference you're getting, and the sound quality is almost as good as FM, certainly better than LW. As a bonus, you'll be able to get additional stations, such as Radio 4 extra.

link to this
Richard Davis's 26 posts Bronze Bronze GB
Select more comments
Page 2

Your comment please
Please post a question, answer or commentUK Free TV is here to help people. If you are rude or disrespectful all of your posts will be deleted and you will be banned.

Privacy policy: UK Free Privacy policy.