BBC Radio Ulster/Foyle

On the map

Where BBC Radio Ulster/Foyle is radiated from — 10 transmitters [V], Ofcom's published positions. This says nothing about how far the signal reaches; it is not a coverage map.

FM

10 FM transmitters, strongest first. ERP is published per polarisation; a dash means nothing is radiated in that plane.
Transmitter	Nation	Frequency	ERP (H)	ERP (V)	Height	RDS name	PI code	Area
Divis	Northern Ireland	94.5 MHz	62.5 kW	61.1 kW	115 m	BBC_Ulst	C319	Northern Ireland
Londonderry	Northern Ireland	93.1 MHz	15.6 kW	15.6 kW	77 m	BBC_Fyle	C419	Londonderry
Brougher Mountain	Northern Ireland	93.8 MHz	5.0 kW	5.0 kW	46 m	BBC_Ulst	C519	Omagh and Enniskillen
Limavady	Northern Ireland	95.4 MHz	1.7 kW	1.7 kW	29 m	BBC_Ulst	C319	Limavady
Camlough	Northern Ireland	93.1 MHz	1.6 kW	2.0 kW	30 m	BBC_Ulst	C319	South Newry
Kilkeel	Northern Ireland	93.8 MHz	100 W	100 W	33 m	BBC_Ulst	C319	Kilkeel
Ballycastle	Northern Ireland	95.1 MHz	50 W	50 W	28 m	BBC_Ulst	C319	North Antrim
Carnmoney Hill	Northern Ireland	95.3 MHz	—	20 W	50 m	BBC_Ulst	C319	Newtownabbey
Rostrevor Forest	Northern Ireland	92.7 MHz	20 W	20 W	22 m	BBC_Ulst	C319	South Newry
Larne	Northern Ireland	93.5 MHz	16 W	16 W	41 m	BBC_Ulst	C319	Larne

Radiation pattern

Divis publishes the strongest FM signal for this station with a shape on record — where it is carried elsewhere too, this is not necessarily theirs.

Radiates most strongly toward the north-west (310°), as published by Ofcom.

More detail

Each ring is 10 dB of attenuation below the pattern's own peak; the outer rim is the peak itself and anything 30 dB down or deeper is drawn at the centre rather than off the edge of the chart, so a very deep null reads as “weak” and not as a hole in the picture. The shape says which direction radiates harder relative to the mast's own peak, not the absolute field strength there or how far it reaches — that is what the coverage map and the postcode lookup are for. Solid is horizontal polarisation, dashed is vertical.