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UK Broadcast Transmission |
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THE TRANSMISSION GALLERY
| Photos by Dan Glover | Page last updated: 2016-08-14 |
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| On local high ground just north of Christchurch, this site was used by the Bournemouth local multiplex from 3 June 2003 using phased dipoles with fairly directional coverage. On 1 May 2015 BBC DAB entered service using a new antenna with a broader coverage pattern. The local multiplex shares the new antenna. |
| The designation "wireless transmitter" on the adjacent sub-station suggests this is a long-established communications site, although I've not been able to trace the history, or indeed the current ownership |
| The site is in woodland - part of a nature reserve - so it's not really possible to get a clear view of the structure except from underneath |
| In fact there are two structures. The DAB array is on the taller (square) tower... |
| ...and is the two pairs of phased dipoles at the top |
| Ofcom data shows maximum ERP on bearing 330 |
| Seen from Hengistbury Head, looking past Christchurch Priory. The towers are well above the tree line and the site should provide good coverage to the low-lying areas on the other side of the ridge |
| A new antenna was brought into service in May 2015 when the BBC national multiplex was added. These photos are from a "drive by" visit in August 2016 however previous experience suggests the new installation might not be particularly visible at close range. The phased dipoles were at 38 m - just clear of the main structure. A new support pole has been added, with Ofcom data now showing the antenna at 44 m. |
| Previously the maximum ERP was on bearing 330, now it is shown as on bearing 000 but the detailed parameters suggest a broad main lobe with reduced coverage between around 120 and 240 degrees. This pattern is achieved by the different spacings between the pole and each dipole. |
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