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Sudbury was opened in 1968 (see details of original transmitter) for the transmission of BBC2, then BBC1 & ITV were added in 1970 before Channel 4 came along in 1982. The figures for the mast heights vary according to which source you look at, but I reckon the mast height for the original TX is about 140m (a.g.l) with the aerial array (covered by its fibreglass shroud) on top of that, possibly another 20m. The second of the structures, the one transmitting digital, is around 130m in total height, see How High is High ?   The site height is 70m and the TX is located about 14 miles WSW of Ipswich.

Sudbury Transmitters from the South.  The original Sudbury transmitter is on the right and the supplementary transmitter on the left.

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Ahhh, so they are different heights ! Sudbury`s two masts from a point exactly equidistant from both of them. The fact they`re bending inwards is obviously down to the wide angle lens, not some new fangled engineering technology. The fact the picture is of low quality was down to the lighting conditions, but I`m not going all the way back just for one photo !

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Sudbury`s channels in relation to the UHF TV band and the gain curves of the aerials we recommend for it.   DM Log    Log36     Yagi18E     DY14WB     XB16E

Note the gain plot of the original B group of the transmitter and how certain MUXES are out of band, namely MUXES 4, 5 and 6, particularly the 4 and 5.

Also see other relevant E group curves.

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There are no interleaved spectrum channels allocated to Sudbury in the latest scheme.

A slight chance exists of more TV channels being transmitted between CHs 31 and 37. All these channels can by picked up be decent E groups aerials (or widebands).

External Links


Sudbury transmitter Page on MB21

Sudbury transmitter Page at The Big Tower

Sudbury transmitter Page on Wikipedia


Digital UK Sudbury transmitter

Digital UK details of Anglia transmitters

Ofcom details of Anglia transmitters

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Those situated to the West of Sudbury may find that during certain weather condition they can suffer from co-channel interference as their aerials are pointing towards the continent.

Sudbury Transmitter


OS Grid Ref TL 912 376


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 Sudbury in July 2011

Sudbury is a pretty powerful transmitter, specifically the joint eighth most powerful in the country.


Note the huge power increase at switchover.


Sudbury is horizontally polarised and was originally a B group before the advent of Digital, it is now an E group.


The MUX allocations mean that MUXES 4 and 5 are be on CHs 58 & 60 which would not normally be receivable on an original B group aerial. MUX 6, on CH 56 may be received on a B group though possibly not some crappy contract aerials though.......


Sudbury has eight small repeater transmitters off it.

a = (ex) analogue 1 to 4

b = (ex) analogue C5

c = digital

d = (ex) digital MUX2 on CH68

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.

This is one reason why your signal may have got better after switchover !

Above left we have Sudbury`s pre DSO  transmitting antennas from the West, and above right a picture taken from the East.

Post DSO, from July 2011, the PSB MUXES will be transmitted from the (omni-directional) analogue antennas. The main original mast (the slightly taller one) will transmit the three PSBs, and, from June 2012 the three COMs at full power as well. Until then the COMs will be broadcast from their original antennas on the (slightly shorter) supplementary mast.

When switchover is fully complete the second mast will become the COM reserve.

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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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#SudburyChannels

Subjects are listed on this page in the following order :


History and general info of Sudbury transmitter


Sudbury transmitter coverage (area & population)


Digital power output, aerial group and polarisation of Sudbury transmitter


Possible extra (future) channels from Sudbury


Continental co-channel interference issues with Sudbury


Our TV aerial recommendations for Sudbury


Sudbury external links


Pictures of Sudbury transmitter


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


Sudbury`s channels/frequencies (including alternative transmitters)

Sudbury`s approximate population coverage is just under one and a half million. Many people in Ipswich, Colchester, Bury St Edmunds and Chelmsford use Sudbury. In addition it`s an alternative transmitter for Cambridge, Southend and NW London.E

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For Sudbury we recommend the DM log for strong signal areas, the Log36 for medium signal areas, the Yagi18E 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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Sudbury transmitter`s channel allocations


The guide below also includes the same information for other potentially co-receivable transmitters within Sudbury`s coverage area, namely, Bluebell Hill, Crystal Palace, Hertford, Hemel Hempstead, Oxford, Sandy, Waltham, Belmont and Tacolneston. The Channel Allocation Guides can 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.


Note the gaps in the table below for channels 31 to 37 and 61 to 68, they`re reserved for “other uses”.


Also check Sudbury`s eight small repeater transmitters.


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