Llwyn Onn

Wales · TV and FM

Position: 52.737511, -4.037731
Grid reference: SH62521749
Nation: Wales
Ground height: 277 m
Antenna height: 28 m
Aerial group: Group A — C21–37, the low end of the band
Polarisation: Vertical
BBC region: Wales
ITV region: Wales
ITV news region: Wales
Parent transmitter: Preseli
Ofcom site number: 12910

The position is our conversion of Ofcom's grid reference SH62521749 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	0.00% of UK Output Areas	a relay, serving a local area
FM radio	0.00% of UK Output Areas	a relay, serving a local area

On the map

Where Llwyn Onn is the strongest signal for television and FM radio.

Television

Multiplexes transmitted from this site, as published by Ofcom.
Mux	Freeview name	Channel	Frequency	ERP	System	Operator
PSB1	BBC A	C25	506 MHz	28 W	DVB-T	BBC
PSB2	D3&4	C22	482 MHz	28 W	DVB-T	Digital 3&4 (ITV/Channel 4)
PSB3	BBC B	C28	530 MHz	28 W	DVB-T2	BBC

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	88.3 MHz	—	250 W	24 m	_BBC_R2_	C202	V
BBC Radio Wales	90.5 MHz	—	250 W	24 m	BBCWales	C618	V
BBC Radio Cymru	92.7 MHz	—	250 W	24 m	BBCCymru	C61B	V
BBC Radio 1	97.9 MHz	—	250 W	24 m	Radio_1_	C201	V
BBC Radio 4 (FM)	104.8 MHz	—	250 W	24 m	_BBC_R4_	C204	V