All posts by Aerialman
Below are all of Aerialman's postings, with the most recent are at the bottom of the page.
The other interesting aspect of the Arfon TV transmitter is that it is well received on the East coast of Eire particularly in the Dublin and Wicklow areas.At 2Kw,i would imagine that DTT from Arfon is quite robust in these areas.
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More interesting facts:largest stayed mast brodacasting as a relay station.Highest relay station in the country:mean aerial heigt=601 meters.
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Garret,It's quite possible that you are receiving a marginal signal from the Cairn Hill transmitter in the Irish Midlands which will cancel out the BBC B/HD Mux from Arfon,both on Channel 47.
Cairn Hill does stray into areas,south of Dublin and at 160Kw is an powerful transmitter.Erespective of different polarizations,between the two transmitters.
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The final destination for SV2 at Clermont Carn is channel 56,is it not?
Which would be quite logical.
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I notice that in BBC Handbook 1974 that Crystal Palace VHF Band 1,Channel 1 was running at 200Kw.But by the time VHF/TV
Transmitters were being switched off in
1982 erp at C P had been reduced to 100Kw.
I would be interested to know why,when and how this was achieved?
Similarly,the IBA Black Hill,VHF Band 3
Transmitter at various times was running
at 300Kw,475Kw and 400Kw.
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Friday 13 April 2012 1:29PM
Arfon,is one of those more interesting Transmitter sites.
Origionally a VHF Band 3 TV transmitter,broadcasting ITV, HTV Wales on Channel 10, Horizontal polarization at 10KW.
A relay of Presely at that time.Commission date:9/11/62.
Then on 17/10/75,Arfon also started to Brodcast BBC 1/BBC 2/HTV Wales on channels
51/44/41 respectively,Vertical polarization on UHF.
According to the IBA at the time,this transmitter was broadcasting all TV channels at 3.6Kw,but in the BBC handbook at 3.5Kw. Up until the last listing of analogue Transmitters on the BBC website Arfon was then broadcasting at 4.2Kw?
Then i see your information showing that Arfon's analogue powers as being only 4 Watts!
What's the full story?
If you look at any other UHF Main/relay station,particularly during the UHF analogue era,transmitter powers were uniformed.
I 'cut my teeth'using this Transmitter for domestic installs well down the Cardigan coastline as far as Aberaeron/Tre-saith,where reception of both Blaenplwyf and Preseli was impossible.Ocassionally reception suffered from tidal fading,though mast head Amplifiers largely compensated for any losses.
Arfon also broadcasts Classic FM at 18.75Kw mixed pol and Heart?Cymru at 5Kw mixed pol on Band 2 VHF/FM.DAB:BBC/Digital 1 on Band 3 VHF.