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Close up of stay tensioning assembley

That`s a big bolt.....


Close up of one of Mendip television transmitters stay tensioning assemblies where it attaches to the anchor block.


Note the £1 coin (to give an idea of the scale) and also the earthing straps.

Mendip TV transmitter at Dusk

Mendip television transmitter at dusk, looking towards the South West.

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Mendip transmitter in the clouds

Mendip transmitter into the clouds, and out of the top........

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Mendip TV transmitter

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That`s a big piece of concrete (and there`s a lot more of it underground)...... One can imagine how much pull is exerted on the stay lines (particularly in a high wind) by the size of the block required to anchor it.

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Mendip transmitter

Mendip`s channels in relation to the UHF TV band and the gain curves of the aerials we recommend for it.   DM Log    Log36     Yagi 18E     DY14WB    XB16E

Also see other relevant C/D group curves.

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External links


Mendip transmitter page at MB21

Mendip Transmitter page at The Big Tower

Mendip Transmitter page on Wikipedia


Digital UK Mendip transmitter

Digital UK details of Mendip`s transmitters                                           

Mendip television transmitter (TX) is situated 18 miles South of Bristol. It is a "guyed mast" structure (309m in height see How High is High?) and is identical to Waltham and Bilsdale. It was built in 1967 by British Insulated Callender`s Cables (or B.I.C.C) who were responsible for much of the infrastructure built in this country from 1945 up to the 1980s. The company is still going but now called Balfour Beatty. The mast is a tubular structure to the top and has in internal lift, though this is thought to be out of use following the accident at Belmont. Mendip transmitter was originally owned by the BBC before being sold off to Crown Castle then to National Grid Wireless and finally to Arquiva (sic).

Mendip has no railways within 12 miles of it now but the old Somerset & Dorset line (from Bath to Bournemouth) used to run only three miles to the west of it. The S & D was opened between 1862 and 1874 but finally closed in 1966, thus no travellers on it would have seen  the transmitter as it was opened in 1967 !

Mendip Transmitter


OS Grid Ref  ST 564 488


Note, due to the new phenomenon of MUXICAL chairs you may experience problems with certain MUXES disappearing. First try rescanning your TV / set top box, do it manually if possible. If this fails to sort it check on transmitter work or call the reception advice phone numbers.


Also see basic digital fault finding.


Switchover occurred at Mendip in April 2010

Mendip is a powerful transmitter, it has the joint eighth highest output in the country but it still needs fifty four smaller repeaters to improve its coverage in areas of poor reception due to the hilly terrain in its coverage area.


Mendip transmitter is horizontally polarised and it`s an E group, though for the 6 main digital MUXES it`s still its original C/D group (see the graph for Mendip).

There is one interleaved spectrum channel allocated to Mendip on CH51 (this is within the C/D group) for a possible Bristol local TV station. In addition, there are two planned low power HD MUXES (in the CH 31 to 37 gap) on CHs 33 and 35. These last 2 can by picked up by (decent) C/D group aerials but it must be admitted that an E group (or wideband) aerial would work better.

We are more than willing to give advice to those actually purchasing from us. Could those only seeking information please just find the answer somewhere on this site, or ring an aerial installer local to them, or call the reception advice phone numbers.

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Mendip transmitter

Subjects are listed on this page in the following order :


History and general info of Mendip Transmitter


Mendip transmitter coverage (area & population)


Digital power output, aerial group and polarisation of Mendip transmitter


Possible extra (future) channels from Mendip


Our TV aerial recommendations for Mendip


Mendip external links


Pictures of Mendip transmitter


Mendip`s graph (its transmissions v our aerial recommendations)


Mendip`s channels/frequencies (including alternative transmitters)

Mendip has a  population coverage of around 1.5 million and its signals are picked up in many towns/cities including Bristol, Bath, Chippenham, Weston Super Mare and areas of South Wales including Cardiff. In fact there are a lot of houses in Cardiff which can actually see Wenvoe transmitter, but still use Mendip !  I wonder why..... Anyway, it`s also fairly common for people to have two aerials, one for each transmitter combined onto one downlead. A decent splitter in reverse will often work but use of a channel 51 diplexer will work better, the only problem with the latter being that Mendip`s MUXES 1 and 4  would be lost.

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For Mendip we recommend the DM log for strong signal areas, the Log36 for medium signal areas, the Yagi 18E or the DY14WB for poor signal areas, and the XB16E for those with the most marginal signals. The dimensions and test performance of the aerials can be found on the relevant tables. If requiring a “high gain aerial” in the loft we recommend the DY14WB over the XB16 because of the former aerial`s smaller size.

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If you`ve found this site informative and, hopefully, interesting as well,

please help us increase the number of people reading it.


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Mendip`s Channel Allocations


The channel guide below also includes the same information for Rowridge, Stockland Hill, Wenvoe, Ridge Hill, Bristol Kings Weston, Bristol Ilchester, Oxford, Hannington and Salisbury. This data can be of great use in determining possible alternative transmitters to try if Mendip fails to give an adequate signal, see the importance of “Line Of Sight”. Notice how all the transmitters outputs dovetail together particularly Ridge Hill, Mendip and Wenvoe.

The channel allocation guides can also be very useful in the diagnosis of co-channel interference problems and can also be invaluable if you are trying to find a spare channel for a modulated output (e.g. for a Sky box or CCTV system) to be added to your TV setup/distribution system without suffering from co-channel.


Also check Mendip`s fifty four smaller repeaters


The frequencies given are for (most) digital MUXES, for analogue channels deduct 3MHz.

The dotted lines are the 2 planned lower power HD MUXES