Cornwall

DAB ensemble · block 11B · 12 transmitters

Ensemble identifier: C1B0
Block: 11B
Frequency: 218.640 MHz
Licence: DL000046
Area: Cornwall
Services: 10 radio, 1 data

On the map

Where Cornwall is radiated from — 12 transmitters [V], Ofcom's published positions. This says nothing about how far the signal reaches; it is not a coverage map.

What it carries

Heart CornwallSmooth CountryBBC CornwallSmooth CornwallHITS RADIO CrnGrt Hits CrnwallCornwall RewindNation CornwallNation 80sNation 90s

Data services

EPG Cornwall

Transmitters

12 transmitters, strongest first. TII is the transmitter identifier a receiver can report, which is how you tell which one you are actually hearing in a single-frequency network.
Transmitter	Nation	Block	Frequency	ERP	Height	Area	TII
Caradon Hill	England	11B	218.640 MHz	5.0 kW	203 m	North-East Cornwall	04/05
Redruth	England	11B	218.640 MHz	4.9 kW	139 m	South-West Cornwall	04/03
North Hessary Tor	England	11B	218.640 MHz	3.2 kW	145 m	Devon	04/0B
Penaligon Down	England	11B	218.640 MHz	1.2 kW	51 m	Bodmin	04/13
Helston	England	11B	218.640 MHz	1.0 kW	39 m	Helston Cornwall	04/16
St Austell	England	11B	218.640 MHz	900 W	49 m	St Austell	04/01
St Just	England	11B	218.640 MHz	600 W	52 m	St Just	04/10
Newquay Hillcrest	England	11B	218.640 MHz	500 W	22 m	Newquay	04/14
St Mawes Water Tower	England	11B	218.640 MHz	500 W	17 m	St Mawes	04/15
Truro	England	11B	218.640 MHz	500 W	37 m	Truro	04/02
Gulval	England	11B	218.640 MHz	300 W	19 m	Gulval	04/04
Bude	England	11B	218.640 MHz	293 W	15 m	Bude	04/0A

Radiation pattern

Its strongest transmitter with a published pattern, Caradon Hill. Other transmitters of this ensemble may shape their signal differently.

Radiates most strongly toward the north-east (30°), 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.