BBC Three Counties Radio

On the map

Where BBC Three Counties Radio is radiated from — 7 transmitters [V], Ofcom's published positions. This says nothing about how far the signal reaches; it is not a coverage map.

FM

7 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
Bow Brickhill	England	104.5 MHz	1.1 kW	1.1 kW	42 m	BBC_3CR	C717	Milton Keynes
Sandy Heath	England	95.5 MHz	600 W	600 W	199 m	BBC_3CR	C617	Bedfordshire
Quainton Hill	England	94.7 MHz	—	400 W	34 m	BBC_3CR	C617	Aylesbury
Zouches Farm	England	103.8 MHz	330 W	390 W	64 m	BBC_3CR	C617	Luton
Epping Green	England	90.4 MHz	—	100 W	85 m	BBC_3CR	C617	Hertfordshire
High Wycombe	England	98.0 MHz	81 W	100 W	50 m	BBC_3CR	CE17	High Wycombe
Hemel Hempstead	England	92.1 MHz	—	50 W	65 m	BBC_3CR	C617	Hertfordshire

Radiation pattern

Bow Brickhill 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 west (260°), 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.

Also published under this name: BBC Three Counties Radio in the Freeview line-up.