North Hessary Tor transmitting station

North Hessary Tor
	North Hessary Tor Caradon Hill
Mast height	196 metres (643 ft)
Coordinates	50°33′01″N 4°00′30″W
Grid reference	SX578742
Built	1955
Relay of	Caradon Hill
BBC region	BBC South West
ITV region	ITV Westcountry

Situated on the summit of North Hessary Tor in Devon, England is an FM radio and television transmitter which uses as aerial a 196 metres (643 ft) high guyed mast. It was built by the BBC in 1955 when a transmitter was needed to introduce 405 line television into Devon. It now carries a small UHF TV transmitter which serves Princetown and Dartmoor. FM radio transmissions began in 1956 and cover most of Devon and eastern parts of Cornwall, along with Somerset and South Wales as a backup for Wenvoe. It is owned and operated by Arqiva.

Mast and base station

Mast with worker at base

Services listed by frequency

Analogue radio (FM VHF)

Frequency	kW	Service
88.1 MHz	160	BBC Radio 2
90.3 MHz	160	BBC Radio 3
92.5 MHz	160	BBC Radio 4
97.7 MHz	160	BBC Radio 1
100.0 MHz	160	Classic FM
103.4 MHz	15	BBC Radio Devon

In all BBC publications the national FM ERPs for North Hessary Tor are listed as 160 kW (Mixed Polarisation): Classic FM list their ERP as 80 kW (Horizontal) and 80 kW (Vertical) for North Hessary Tor which is the same as the BBC e.g. 160 kW (Mixed Polarisation) ERP.
The mast covers a large area including Devon, Cornwall, Somerset and South Wales.

Digital radio (DAB)

Frequency	Block	kW	Operator
225.648 MHz	12B	3.2	BBC National DAB

17 December 1954 – 3 January 1985

Frequency	VHF	kW	Service
51.75 MHz	2	15	BBC1

Until 12 August 2009

Frequency	UHF	kW	Service
743.25 MHz	55	0.012	BBC One
775.25 MHz	59	0.012	ITV1
799.25 MHz	62	0.012	BBC Two
823.25 MHz	65	0.012	Channel 4

12 August 2009 – 9 September 2009

Frequency	UHF	kW	Service	System
743.25 MHz	55	0.012	BBC One	PAL System I
775.25 MHz	59	0.012	ITV1	PAL System I
801.833 MHz	62	0.0025	BBC A	DVB-T
823.25 MHz	65	0.012	Channel 4	PAL System I

9 September 2009 - June 2013

Frequency	UHF	kW	Operator	System
746.000 MHz	55	0.0025	BBC B	DVB-T2
778.000 MHz	59	0.0025	Digital 3&4	DVB-T
801.833 MHz	62	0.0025	BBC A	DVB-T

From June 2013

In June 2013, BBC A moved from UHF 62 to UHF 50, to allow for the clearance of the 800 MHz band for 4G LTE mobile services.

Frequency	UHF	kW	Operator	System
706.000 MHz	50	0.0025	BBC A	DVB-T
746.000 MHz	55	0.0025	BBC B	DVB-T2
778.000 MHz	59	0.0025	Digital 3&4	DVB-T

References

External links

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