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Winter Hill Transmitter                                OS Grid Ref SD 660 144

Note, as work takes place on various digital transmitters (to prepare for the DSO) you may
experience problems, e.g. with certain MUXES disappearing. First try rescanning your
TV / set top box (do it manually if possible), but if this fails to work check on transmitter work
or call the reception advice phone numbers.   Also see basic digital fault finding.

Winter Hill television transmitter was built in 1965 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 transmitter was originally owned by the ITA then it was sold off to NTL and finally to Arquiva (sic). Winter Hill is one of the most important transmitters in the UK and is located on the high ground 5 miles NW of Bolton overlooking the “Cheshire plain”, thus giving it a coverage area stretching down as far as Crewe, Stoke and even Shrewsbury. It has the second greatest population coverage of any British TV transmitter at around 7 million people and its signals are received in many large towns/cities including Liverpool/Birkenhead, Manchester, Warrington, Preston and Blackpool.
The high ground which the mast is built on was a contributory factor to the infamous plane crash on these moors in 1958, 35 people died and 7 survived. On a clear day much of the plain to the South is visible and the views are stunning, from Rochdale in the East all the way round to Southport in the West.
Winter Hill mast is 309m high (a.g.l.) - see How High is High ? - and had an internal lift (it`s no longer in use following the accident at Belmont) though this didn`t go the top because (unlike Mendip, Bilsdale and Waltham) the structure is only tubular to the third stay level.
The elevated site means its transmitting antennas are the highest of any main television transmitter in the country at 718m. Only Holme Moss is higher than this (at 758m) but
since 1984 that has only broadcast radio. Due to the mountainous terrain in the NW of England Winter Hill has a large number of repeater transmitters (67 of them) relaying the signal into the valleys and dips which do not have the critical “line of sight” reception path.
The design and height of the mast are similar to Waltham though the latter has only 4
sets of stays rather than the 5 of Winter Hill. Both are shorter versions of the Belmont
transmitter in Lincolnshire and coincidentally there is also a village called Belmont not
more than a mile from Winter Hill !
The transmitter is horizontally polarised and it is a C/D group.
Digital transmission power is 100kW, apart from MUX6 (on CH55) which will only be transmitted on reduced power - 12.5kW - until 2011, due to co-channel issues.
Sutton Coldfield transmitter is transmitting on CH55 till Sept 2011.
(Pre DSO the transmission power was 10kW for all MUXES)
DSO occurred between the 4th of November and the 2nd Dec 2009.

HDTV (via Freeview) transmission from Winter Hill commenced at switchover on Dec 2nd, although there won`t be any set top boxes to receive it until they`re on sale in 2010 !
Because Winter Hill was switching over there was no temporary additional low power HD MUX (like with Crystal Palace for instance), the HD went straight out on MUX3, as it will eventually do at all transmitters as they switchover from early /mid 2010.

There are three (the only TX which has three) interleaved spectrum channels allocated to Winter Hill on CH56, CH57 & CH60. All three are within the C/D group.

Since Winter Hill has not changed group from when it was analogue (and provided you are
in a reasonable reception area and/or have a good quality aerial installation) most people
will probably get Freeview OK without having to change their aerial, see Winter Hill graph.
Winter Hill`s transmissions
Right is a Log Periodic aerial mounted at an unusual angle (on the roof of Winter Hills base station) so as to align with the transmitter nearly 300m above it !

Below is the memorial to the 1958
plane crash.  Pictures Justin Smith (ATV)
Winter Hill transmitter`s Frequency/Channel Allocation Guides, for before (above) and after (below) the complete digital switchover.

Also see Winter Hill`s sixty seven smaller repeater transmitters.

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

Note Storeton Wales which started transmitting in October 2009. This will broadcast Welsh Language MUXES (from Moel Y Parc) in a tight 30 degree arc around Flint.

Note the gaps in the table below for channels 31 to 35, 37, 39 to 40 and 63 to 68, they`re reserved for “other uses”....
Winter Hill transmitter, with the cairn in the foreground
"Sag" on the stay wires at Winter Hill

Close up of the stays holding up Winter Hill transmitter. From a distance they look straight but this shot shows that their great weight introduces a significant “sag” to the cables.                                                                            Picture Justin Smith (ATV)

Winter Hill television transmitter “up close”.    Picture Justin Smith (ATV)

Winter Hill TV transmitter with the cairn (visible from the railway and the M61) in the foreground. Note the other communication transmitters present on this piece of high ground.

See Winter Hill`s height in relation to other transmitters.

Plaque commemorating the Winter Hill air disaster
Log Periodic at Winter Hill transmitter, now that`s what I call line of site !

Winter Hill`s channels in relation to the UHF TV band and the gain curves of the aerials

we recommend for it.   DM Log    Log40     Yagi18C/D     DY14WB     XB16E

 

Also see other relevant C/D group curves.

Winter Hill TV transmitter "up close"

For Winter Hill we recommend the DM log for strong signal areas,

the Log 40 for medium signal areas, the Yagi18CD 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.

For Winter Hill`s TV frequencies see its Channel Allocation Guides for before and after the (whole countrywide) digital switchover. These also include the same information for

other major (potentially) co-receivable transmitters Sutton Coldfield, The Wrekin, Fenton, Moel Y Parc, Storeton, Llanddona, Lancaster, Caldbeck, Pendle and Saddleworth.

This can be useful for diagnosing causes of co-channel interference or alternatively identifying other transmitters which may give a superior signal. Notice how all the transmissions “dove tail” with each other. The Channel Allocation Guide(s) 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.

 

Winter Hill is visible from miles around and clearly in view of the roads and railway which

run a few miles to the South. The main road is the M61 from Preston to Manchester which was opened in stages between 1969 and 1970. The railway has a particularly interesting history as it was one of the first “inter city” lines opened way back in 1841 as the Bolton & Preston. After this it went through a bewildering number of owners, it became a North Union line in 1844, then the Lancashire & Yorkshire/London & North Western Joint in 1888, LMS (London, Midland & Scottish) in 1923 and then British Rail in 1948. And that was before

the farce of privatisation with Railtrack in 1994, the latter was sold off in 1996 before finally

being taken over by Network Rail in 2002 !

 

External Links

 

Winter Hill transmitter page at MB21

Winter Hill transmitter page at The Big Tower    

Winter Hill transmitter page on Wikipedia  

Gain curves of aerials for Winter Hill transmitter

Spectrum = Interleaved Spectrum Channels

Some post switchover MUX allocations will be changed due to the 800MHz clearance.

 

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