Arfon

Wales · TV, FM and DAB

Position: 53.019865, -4.273476
Grid reference: SH47604937
Nation: Wales
Ground height: 300 m
Antenna height: 311 m
Aerial groups: Group B — C35–53, the middle, Group A — C21–37, the low end of the band
Polarisation: Vertical
BBC region: Wales
ITV region: Wales
ITV news region: Wales
Parent transmitter: Llanddona
Ofcom site numbers: 11898, 11899

The position is our conversion of Ofcom's grid reference SH47604937 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	0.09% of UK Output Areas	a relay, serving a local area
FM radio	0.13% of UK Output Areas	a substantial transmitter
DAB radio	0.07% of UK Output Areas	a relay, serving a local area

On the map

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

Television

Multiplexes transmitted from this site, as published by Ofcom. Ofcom list this mast more than once — usually one row per polarisation — so the last column says which row each multiplex comes from.
Mux	Freeview name	Channel	Frequency	ERP	System	Operator	Ofcom row
PSB1	BBC A	C41	634 MHz	2.0 kW	DVB-T	BBC	Arfon South
PSB1	BBC A	C29	538 MHz	8.0 kW	DVB-T	BBC	Arfon North
PSB2	D3&4	C44	658 MHz	2.0 kW	DVB-T	Digital 3&4 (ITV/Channel 4)	Arfon South
PSB2	D3&4	C31	554 MHz	8.0 kW	DVB-T	Digital 3&4 (ITV/Channel 4)	Arfon North
PSB3	BBC B	C47	682 MHz	2.0 kW	DVB-T2	BBC	Arfon South
PSB3	BBC B	C37	602 MHz	8.0 kW	DVB-T2	BBC	Arfon North

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
Classic FM	100.7 MHz	3.7 kW	15.0 kW	283 m	Classic_	C2A1	HV
Capital	103.0 MHz	2.5 kW	2.5 kW	259 m	Capital	C373	HV
Heart	107.2 MHz	625 W	2.5 kW	255 m	Heart___	C6AA	HV

DAB radio

DAB ensembles carried here.
Ensemble	Block	Frequency	ERP	Height	Area	EId	Services
North West Wales	10D	215.072 MHz	4.9 kW	240 m	North West Wales	C1BF	15
D1 National	11D	222.064 MHz	1.9 kW	240 m	North West Wales	C181	30
BBC National DAB	12B	225.648 MHz	3.9 kW	240 m	NW Wales	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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