Cool FM/Downtown Radio

On the map

Where Cool FM/Downtown Radio is radiated from — 9 transmitters [V], Ofcom's published positions. This says nothing about how far the signal reaches; it is not a coverage map.

FM

9 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
Londonderry	Northern Ireland	102.4 MHz	5.0 kW	5.0 kW	77 m	Downtown	CC86	Londonderry
Brougher Mountain	Northern Ireland	96.6 MHz	3.2 kW	5.0 kW	46 m	Downtown	CC86	Omagh and Enniskillen
Black Mountain	Northern Ireland	97.4 MHz	1.4 kW	1.9 kW	232 m	COOL_FM_	C5B2	Belfast
Limavady	Northern Ireland	96.4 MHz	1.0 kW	1.0 kW	28 m	Downtown	CC86	Limavady
Camlough	Northern Ireland	103.1 MHz	900 W	900 W	18 m	Downtown	CC86	South Newry
Newcastle	Northern Ireland	103.4 MHz	100 W	100 W	25 m	Downtown	CC86	Newcastle
Portglenone	Northern Ireland	102.3 MHz	100 W	400 W	18 m	Downtown	CC86	Ballymena
Larne	Northern Ireland	97.1 MHz	40 W	40 W	41 m	Downtown	CC86	Larne
Carnmoney Hill	Northern Ireland	103.4 MHz	—	10 W	50 m	Downtown	CC86	Newtownabbey

Radiation pattern

Londonderry 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 east (80°), 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.