Llanddona

Wales · TV, FM and DAB

Position: 53.306926, -4.128396
Grid reference: SH58288100
Nation: Wales
Ground height: 143 m
Antenna height: 112 m
Aerial group: Group B — C35–53, the middle
Polarisation: Horizontal
BBC region: Wales
ITV region: Wales
ITV news region: Wales
Ofcom site number: 11800

The position is our conversion of Ofcom's grid reference SH58288100 from OSGB36 to WGS84 [V]. Ofcom publish no latitude and longitude for television sites. The transform is verified rather than assumed: on the 3,403 radio records that carry both, it reproduces Ofcom's own coordinates to within 0.1 m.

How far it reaches

The share of the UK's 238,895 Census Output Areas where this mast is the strongest signal of its kind. Not the share it reaches at all — most places can receive several transmitters, and only one of them can be the best.

Band	Best signal in
Television	0.13% of UK Output Areas	a substantial transmitter
FM radio	0.09% of UK Output Areas	a relay, serving a local area
DAB radio	0.09% of UK Output Areas	a relay, serving a local area

On the map

Where Llanddona is the strongest signal for television, FM radio and DAB radio.

Television

Multiplexes transmitted from this site, as published by Ofcom.
Mux	Freeview name	Channel	Frequency	ERP	System	Operator
PSB1	BBC A	C40	626 MHz	20.0 kW	DVB-T	BBC
PSB2	D3&4	C43	650 MHz	20.0 kW	DVB-T	Digital 3&4 (ITV/Channel 4)
PSB3	BBC B	C46	674 MHz	20.0 kW	DVB-T2	BBC
COM4	SDN	C41	634 MHz	20.0 kW	DVB-T	SDN (ITV plc)
COM5	ARQ A	C44	658 MHz	20.0 kW	DVB-T	Arqiva
COM6	ARQ B	C47	682 MHz	20.0 kW	DVB-T	Arqiva

FM radio

FM services. ERP is published separately per polarisation; a dash means nothing is radiated in that plane.
Station	Frequency	ERP (H)	ERP (V)	Height	RDS name	PI code	Pattern
BBC Radio 2	89.8 MHz	10.5 kW	10.5 kW	91 m	_BBC_R2_	C202	HV
BBC Radio 3	92.0 MHz	10.5 kW	10.5 kW	91 m	_BBC_R3_	C203	HV
BBC Radio Cymru	94.2 MHz	10.5 kW	10.5 kW	91 m	BBCCymru	C71B	HV
BBC Radio Wales	94.8 MHz	5.0 kW	5.0 kW	91 m	BBCWales	C718	HV
BBC Radio 1	99.4 MHz	10.5 kW	10.5 kW	91 m	Radio_1_	C201	HV
BBC Radio 4 (FM)	103.6 MHz	10.5 kW	10.5 kW	91 m	_BBC_R4_	C204	HV

DAB radio

DAB ensembles carried here.
Ensemble	Block	Frequency	ERP	Height	Area	EId	Services
North West Wales	10D	215.072 MHz	3.5 kW	82 m	Anglesey	C1BF	15
D1 National	11D	222.064 MHz	977 W	82 m	Anglesey	C181	30
BBC National DAB	12B	225.648 MHz	5.0 kW	82 m	Anglesey	CE15	16

North West Wales — block 10D

Capital N WalesSmooth N WalesCapital CymruBBC Radio WalesBBC Radio CymruRETUNENation RadioBBC R Cymru 2Bayside RadioNation 80sNation 90sGrt Hits N WalesHits Radio N WalNation 70sDragon Radio

D1 National — block 11D

BBC National DAB — block 12B

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