Mynydd Machen

Wales · TV and DAB

Position: 51.604187, -3.122175
Grid reference: ST22389008
Nation: Wales
Ground height: 360 m
Antenna height: 51 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: Wenvoe
Ofcom site number: 10603

The position is our conversion of Ofcom's grid reference ST22389008 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	0.14% of UK Output Areas	a substantial transmitter
DAB radio	0.18% of UK Output Areas	a substantial transmitter

On the map

Where Mynydd Machen is the strongest signal for television and DAB radio.

Television

Multiplexes transmitted from this site, as published by Ofcom.
Mux	Freeview name	Channel	Frequency	ERP	System	Operator
PSB1	BBC A	C23	490 MHz	500 W	DVB-T	BBC
PSB2	D3&4	C26	514 MHz	500 W	DVB-T	Digital 3&4 (ITV/Channel 4)
PSB3	BBC B	C29	538 MHz	500 W	DVB-T2	BBC

DAB radio

DAB ensembles carried here.
Ensemble	Block	Frequency	ERP	Height	Area	EId	Services
Cardiff small-scale	10D	215.072 MHz	50 W	40 m	Machen	C1E0	15
BBC National DAB	12B	225.648 MHz	1.0 kW	17 m	South Wales (East)	CE15	16
South East Wales	12C	227.360 MHz	400 W	17 m	South Wales (East)	C189	16

Ofcom's notes

SFN with Pontypool (PSB multiplexes).

Mynydd Machen

How far it reaches

On the map

Television

DAB radio

Cardiff small-scale — block 10D

BBC National DAB — block 12B

South East Wales — block 12C

Ofcom's notes