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THE TRANSMISSION GALLERY

Photo by Robert Whittaker, Shaun Chew and Mike Pratt

Bath Somerset
NGR: ST769654 Maps: Google  Bing (Ord Surv) Site Height: 167.6m Structure Height: 45m
Digital TV: BBC A: 25 D3&4: 28 BBC B: 22
BBC Radio: Radio 1: 98.6 Radio 2: 89.0 Radio 3: 91.2 Radio 4: 93.4
  Radio Bristol: 104.6 
Ind. National Radio: Classic FM: 100.2 
Ind. Local Radio: Heart FM (West Country): 103.0  The Breeze (Bath): 107.9 
Digital Radio: BBC National: 12B        Digital One: 11D        Bristol: 11B        West Wiltshire: 12D       
Comments: Bath is a TV relay of Mendip and a network FM relay of Wenvoe
   

This is the City of Bath's TV and radio relay transmitter, located on Bathampton Down, next to a golf course and the University of Bath.

This photo [left] was taken by Mike Pratt on a sunny day in 1999.

From the top you have: UHF TV (in white fibreglass shield), local FM radio, national FM Radio, Cellnet, paging antennas, Vodafone (omni-directional poles), Orange, as well as other services.

The neighbouring tower that can be seen in the lower right corner is for One2One.

All the Band II transmissions for Bath come from the arrays of mixed polarisation crossbow antennas located on the TV relay tower, just below the UHF cylinder. There are two arrays, the lower one consisting of four antennas arranged on all four faces of the mast to form an omnidirectional radiation pattern. The upper aperture has one antenna facing west only.

Ofcom & BBC documents indicate that the three commercial services, Classic, GWR and Bath FM, plus the BBC national services have antenna heights of 41m AGL and so look to be all transmitted from the lower array.

   

The BBC Radio Bristol aerial is listed as 45m AGL so is most probably the upper antenna. Radio Bristol is the only FM service on the Bath relay whose main transmissions come from Mendip, so it is likely that Mendip's coverage of the area around Bath is better than that of Wenvoe or Dundry, and so only coverage to the west is required.

There are also multiple RX antennas at the site. On the TV relay tower, there are two Trough antennas are pointing towards Mendip for the TV services. For FM there is a vertical Yagi, also pointing at Mendip, which provides the program feed for BBC Radio Bristol. Next to it is a horizontal Log Periodic pointing at Wenvoe, which is for Radios 2, 3 and 4.

DAB antennas have recently been installed at the site, and can be seen sharing the lower Band II aperture, on the west, north and east faces only.

On the smaller tower, there are two vertical log periodics pointing at Oxford, which are for Radio 1. This is because R1 occasionally offers regional opt out evening programmes in Wales, Scotland and NI, making Wenvoe an unsuitable programme source for an English transmitter.


Mark Carver describes this photo as "acquisition to transmission"
- the gantry camera is providing tv coverage from the Bath rugby ground.

Above: the view looking along the A46
Below: the City of Bath

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