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thebigtower |
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llanddona |
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THE LLANDDONA TRANSMITTER is the UHF and BBC FM main station that serves the Isle of Anglesey and parts of the North and North-West Wales coastline. It is sited on Anglesey, close to the island's north-eastern coast. The station first came into operation in January 1958 as a BBC 405-line television transmitter, broadcasting on VHF Channel 1. The first regular UHF transmissions were BBC2 from 3 June 1967 with BBC1 and ITV following much later in 1973. At a height of 106.7m (350.6ft), the mast is the shortest of those present across the six main UHF transmitters in Wales. Somewhat ironically, it is the parent station of the UHF relay at Arfon, which features the tallest mast in Wales. |
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| Aerials> Overhead Site Images (800x600 or 1024x768) Supersize Images> BBC Crest> UHF Map |
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BBC Crest - Click here for full image |
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DIGITAL SWITCHOVER |
Llanddona has completed the Digital Switchover process, the two stages successfully implemented as follows - Stage 1 (DSO1) – 21 October 2009 |
BBC Two analogue ceased transmission on Channel 63 |
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BBC One analogue moved for remainder of operation from Channel 57 to Channel 63 to allow release of Channel 57 |
First BBC multiplex - BBCA (PSB1) launched on Channel 57 |
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Stage 2 (DSO2) – 18 November 2009 |
All remaining analogue and low powered
digital services ceased broadcasting permanently and the high powered digital
multiplexes launched. |
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| Aerials> Overhead Site Images (800x600 or 1024x768) Supersize Images> BBC Crest> UHF Map |
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SITE INFORMATION |
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Location: |
Llanddona, near Beaumaris, Anglesey, LL58 8YE |
Grid Reference: |
SH583810 |
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Landlord: |
Arqiva (Legacy: BBC/Crown Castle UK/NGW) |
Ground Height: |
140.0m |
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BBC Region: |
Wales |
Mast Height: |
106.7m |
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ITV Region: |
Wales |
Aerial Height (*): |
252m |
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UHF Tx Number: |
11800 |
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(*) Average UHF aerial height above sea level (a.o.d) |
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CURRENT TRANSMISSIONS |
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Digital Television (Post-DSO) |
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Analogue Radio (FM) |
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Service |
: Ch/Polarisation/e.r.p |
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Service: |
(MHz) |
(e.r.p) |
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PSB1 |
: 57 / H / 20kW |
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BBC Radio 1: |
99.4 |
21kW |
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PSB2 |
: 60 / H / 20kW |
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BBC Radio 2: |
89.8 |
21kW |
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PSB3 |
: 63 / H / 20kW |
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BBC Radio 3: |
92.0 |
21kW |
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COM1 |
: 43 / H / 10kW |
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BBC Radio 4: |
103.6 |
21kW |
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COM2 |
: 46 / H / 10kW |
BBC Radio Cymru: |
94.2 |
21kW |
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COM3 |
: 50 / H / 10kW |
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BBC Radio Wales: |
94.8 |
10kW |
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Digital Radio |
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BBC National (Block 12B) |
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Digital One (Block 11D) |
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CEASED TRANSMISSIONS |
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(Shutdown completed 18 November 2009) |
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| Analogue Television |
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Digital Television (Pre-DSO) |
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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 |
: 57 / H / 100kW |
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Mux1 |
: 50 / H / 1.0kW |
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| BBC2 |
: 63 / H / 100kW |
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Mux2 |
: 54 / H / 1.0kW |
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| ITV1 |
: 60 / H / 100kW |
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MuxA |
: 58 / H / 1.0kW |
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| S4C |
: 53 / H / 100kW |
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MuxB |
: 61 / H / 1.0kW |
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| Five |
: No Service |
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MuxC |
: 64 / H / 1.0kW |
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MuxD |
: 46 / H / 1.0kW |
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