Services listed by frequency Llanddona transmitting station

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1 services listed frequency

1.1 analogue television

1.1.1 january 1958 - 3 june 1967
1.1.2 3 june 1967 - 6 september 1973
1.1.3 6 september 1973 - 1 november 1982
1.1.4 1 november 1982 - january 1984
1.1.5 january 1984 - 15 november 1998


1.2 analogue , digital television

1.2.1 15 november 1998 - 21 october 2009
1.2.2 21 october 2009 - 18 november 2009


1.3 digital television

1.3.1 18 november 2009 - 14 november 2012
1.3.2 14 november 2012 - present


1.4 analogue radio

1.4.1 1960 - 1990s
1.4.2 1990s - present


1.5 digital radio





services listed frequency
analogue television
january 1958 - 3 june 1967

it unclear when transmissions began. big tower claim 405-line television llanddona started in january 1958, , entrance plaque transmitter building agrees mast , building built in 1958. oddly, bbc research report 1963-50 not mention start date though point out co-channel interference (presumably divis in northern ireland, 180 km northwest across irish sea) severe . caused transmitter s useful service area smaller planned, , forced building of holyhead relay.


405 alive counter-claim precise date of 15 may 1962 start of 405-line television.



3 june 1967 - 6 september 1973

the first uhf transmitter @ site entered service.



6 september 1973 - 1 november 1982

itv s transmissions started on 6 september, bbc 1 wales uhf service had commenced before then.



1 november 1982 - january 1984

channel 4 launched across uk. being in wales, llanddona transmitted s4c variant.



january 1984 - 15 november 1998

the 405-line vhf tv transmission discontinued after 22 years of service.



analogue , digital television
15 november 1998 - 21 october 2009

21 october 2009 - 18 november 2009

the bbc 2 analogue signal switched off after 32 years of service, , bbc 1 analogue moved channel 63. multiplex 1 on channel 50 discontinued. new bbc multiplex took on over channel 57 had been vacated bbc 1 analogue full post-dso erp of 20 kw. bbc expanded version of bbc s multiplexes 1 , b (with several channels, such bbc 4 , radio stations temporarily available on both bbc multiplexes).



digital television
18 november 2009 - 14 november 2012

all remaining analogue tv discontinued, , new post-dso multiplexes took on frequencies plus couple of new ones. frequencies above 800 mhz not re-used these reassigned 4g mobile phone services.



14 november 2012 - present

as side-effect of frequency-changes elsewhere in region clearance of 800 mhz band 4g mobile phone use, llanddona s arqiva b multiplex moved channel 50 channel 40, , d3&4 on channel 60 gained negative frequency offset.




aerial group: w
polarisation: horizontal

analogue radio
1960 - 1990s

vhf fm radio in service october 1960 evidenced bbc research report.



early 1990s - present

radio 1 got own frequency , national radio 4 added set. additionally, frequencies original 3 services increased 200 khz each.



digital radio







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