THE TRANSMISSION GALLERY
|Photos by Mike Smith and Ray Cooper||Page last updated: 2016-08-19|
|Llandinam serves Newtown with a 40 W VHF FM relay of BBC network radio and UHF television.|
Originally a BBC landlord site, TV channels 1 - 3 entered service on 19th November 1976, with S4C available from the launch on 1st November 1982. DSO was on 4th November and 2nd December 2009.
BBC FM radio was added in November 1980. This was re-engineered for mixed polarisation in 1993, with Radio's 1 & 4 added on 30th June 1993.
|Mid-view of the two main masts. The one on the right is the 'broadcast' mast - has the TV Tx antenna at the top (shrouded cardioid facing north). Further down there are two horizontal log band II aerials, one pointed at Newtown and the other up towards Carno. There is also a vertical dipole for FM radio. |
The other mast is a slight mystery in broadcast terms - the gear at the top looks for all the world like a band II tier of square-loop dipoles, but is it? what's it used for - has it replaced the band II logs on the other mast, or is it some new ILR setup? Can't find any info; (but see subsequent information attached to relevant photo below).
Ed. ILR shares the BBC FM aerial system.
|This is a little weird. there's this group of four toed-in logs pointing in exactly the same direction as the main TV RBL aerials on the main mast (pointing at Long Mountain) - but they're situated on a low wooden pole about 100yds from the site. there's a waterproof box on the pole - filter, or more likely mast-head preamp to make up for the feeder loss in the run back to the main building. so what's been going on here? is one (or more) of the TV RBL channels on the main mast subject to some interference from another service that they can't get rid of any other way? I dunno. It's odd.|
The answer, apparently, is that these four logs are indeed provide an alternative RBL source for the ITV/Ch4 services here "at certain times of year".
|There is mention above about a mystery concerning the panel aerials in the picture above. As has now been pointed out by David Williams in a message to mb21, they form a standard VP skeletal slot system as used at numerous "Home Office" type sites.|
David writes: The reason that a second mast exists alongside the broadcast mast is that this was the original mast set up in the early 60's to provide Mid-Wales Police with VHF communication. I lived at Tynyfron, Cwmbelan and was able to see his site from my home. In the late 60's the Llandinam site was co-occupied when the Llangurig-Link was set up to bring UHF television to Mid-Wales.
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