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thebigtower |
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sudbury |
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THE SUDBURY TRANSMITTER is the UHF main station that serves the Suffolk and Essex part of the East Anglia television region. It is sited at Workhouse Green, near the village of Bures, approximately four miles to the south-east of Sudbury town centre. Two other main UHF transmitters at Sandy Heath (Bedfordshire) and Tacolneston (Norfolk) combine with Sudbury to serve the East Anglia region. TRANSMISSION STRUCTURES |
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The Sudbury station is unusual in that it utilises two separate transmission masts. The main structure is a 141.1 metre (463-ft) high triangular cross-section (three-sided) lattice stayed mast. The surmounting fibre-glass (GRP) cylindered UHF aerial extends the overall height to 165.8 metres (544-ft). The secondary structure is also a triangular cross-section mast which stands at a height of 103 metres and was built in 1997 as part of the provision for Digital Terrestrial Television (DTTV) transmission. |
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Aerials> Site Images> Supersize Mast Images> Landscapes> UHF Map |
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| UHF OVERLAP |
| Reception of Sudbury is also possible across parts of suburban Essex that are intended to be served by the London region and, more significantly, across the northern coastline of Kent where the principal coverage is provided by the Dover transmitter, which is part of the south-east region. The Dover transmitter reciprocates the overlap from Sudbury by providing duplicated coverage across some coastal parts of Essex. BBC NATIONAL FM RADIO |
| Sudbury does not carry BBC National or any other BBC FM services as these are generally received across the area from either the nearby Manningtree station in North Essex or Tacolneston. |
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DIGITAL SWITCHOVER |
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The two stages of Digital Switchover at Sudbury were respectively implemented on 6 July 2011 and 20 July 2011. Major re-engineering work in connection with the switchover commenced at the station in late 2009/early 2010, the most visible development being the installation on the main mast of a twelve-tier cylindrical reserve aerial which also provides the main transmission for the COM multiplexes. The main UHF aerial has been retained within the existing GRP-cylinder installation. (See Aerials (2) for images). |
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STATION HISTORY |
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The Sudbury station was built during 1967/8 by the BBC to provide UHF coverage to the Suffolk and Essex part of the East Anglia region. With positioning and ground elevation even more critical than it had been with VHF, the new transmitter site was deemed necessary for UHF despite the existing BBC station at Manningtree, located barely ten miles south-east of the new site and at the time provider of the equivalent BBC 405-line VHF television to much of the same area. The ITA served the region on 405-line VHF from the Mendlesham transmitter in Suffolk but this had also been considered an inappropriate siting for UHF transmission. Sudbury commenced regular service on 10 November 1968 with BBC2, followed in November 1970 by BBC1 and ITV. |
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April 2010 |
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Aerials> Site Images> Supersize Mast Images> Landscapes> UHF Map |
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STATION INFORMATION |
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Location: |
Workhouse Green, nr Bures, Suffolk, CO8 |
Grid Reference: |
TL913377 |
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Landlord: |
Arqiva (Legacy: BBC/Crown Castle/NGW) |
Ground Height: |
70.1m |
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BBC1 Region: |
East |
Main Mast Height (+): |
141.1m |
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ITV1 Region: |
Anglia East |
Second Mast Height (+): |
103m |
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Aerial Height (*): |
221m |
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UHF Tx Number: |
11500 |
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(*) Average UHF aerial height above sea level (a.o.d) |
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(+) Heights not including UHF antennas - main mast height with UHF cylinder is 165.8m |
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CURRENT TRANSMISSIONS |
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Digital Television |
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Analogue Radio (FM) |
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Mux |
: Ch/Polarisation/e.r.p |
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Service: |
(MHz) |
(e.r.p) |
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PSB1 |
: 44 / H / 100kW |
None - BBC National from Manningtree and Tacolneston |
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PSB2 |
: 41 / H / 100kW |
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PSB3 |
: 47 / H / 100kW |
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Digital Radio |
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COM4 |
: 29 / H / 100kW (#58) |
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COM5 |
: 31 / H / 100kW (#60) |
BBC National (Block 12B) |
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COM6 |
: 37 / H / 100kW (#56) |
Digital One (Block 11D) |
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Essex (Block 12D) |
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(#)=Pre-700MHz clearance channel |
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DSO-TERMINATED TRANSMISSIONS |
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(Shutdown completed 20 July 2011) |
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| Analogue Television |
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Digital Television |
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Service |
Ch/Polar/e.r.p |
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Service |
Ch/Polar/e.r.p |
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| BBC1 |
: 51 / H / 250kW |
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Mux1 |
: 49 / H / 7.0kW |
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| BBC2 |
: 44 / H / 250kW |
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Mux2 |
: 68 / H / 8.1kW |
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| ITV1 |
: 41 / H / 250kW |
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(+) |
Mux2 |
: 56 / H / 1.1kW |
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| Ch4 |
: 47 / H / 250kW |
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MuxA |
: 48 / H / 5.0kW |
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| Ch5 |
: 35 / H / 50kW |
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MuxB |
: 39 / H / 7.5kW |
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MuxC |
: 54 / H / 1.5kW |
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MuxD |
: 50 / H / 1.1kW |
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(+) = Sudbury B |
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