THE TRANSMISSION GALLERY
|Photos by Anne and Nigel J. Coote||Page last updated: 2011-11-29|
|Anne and Nigel have provided some excellent detailed shots of this seldom-visited site.|
|A general view of the broadcast apertures.|
Apart from two separate UHF aerials, Sandale sports no less than three distinct Band II apertures.
The top eight-tiers-of-three arrow-heads are for BBC National Radio (122 to 146 m agl, average 134 m agl).
Then (below the platform at 115 m agl) there are four dissimilar tiers of mixed pol aerials for R Scotland (98.5 - 109.5 m agl, average 104 m agl). In amongst these aerials are interleaved DAB aerials.
The bottom four-tiers-of-three MP panels are for BBC R Cumbria (86.5 - 97.5 m agl, average 92 m agl)
The middle R Scotland aerials are not as originally specified when Sandale was re-engineered. Which makes us wonder whether they were changed at the time that the DAB aerials were added.
|A really detailed shot that clearly shows that the ch 22 BBC 1 Scotland panels, at the top, are (or rather were) not shared by the BBC 2 Scotland ch 67 transmissions, below the platform. Perhaps not surprising as they are about as far apart as they can be, at opposite extremes of the UHF band.|
|Above: the Band II Yagis pointing over our heads are RBS on Black Hill AND Ashkirk (0 deg bearing, a compromise between the two sites) whilst the ones pointing out to the left are on Pontop Pike (81 deg bearing). Kirk O Shotts was actually at 342 deg (Black Hill would be similar) and Ashkirk is at 13 deg from Sandale, but an old mast outline suggests that an aerial pointing due north was used for both sites (used for RBS R Scotland). The PP aerials were for RBS National radio.|
However, somewhat confusingly another (moderner) source suggests that RBS for BBC National Radio at Sandale is actually via Caldbeck where Pontop Pike is received and then sent on via SHF. It's not clear why this extra hop is required for a mono RBS feed where the two stations are separated by 400 kHz, normally a run-of-the-mill situation for mono off-air reception.
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