UK Broadcast Transmission
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BBC VHF 405 line TRANSMITTERS

LONDONDERRY
Channel 2H ERP: 1kW
Vision carrier: 51.75MHz Sound Carrier: 48.25MHz
The field strength contours on this map represent average values with the E.R.P. indicated; variations of as much as 3:1 in field strength may occur at individual points especially in hilly or built-up areas. The 0.1mV/m contour should not be interpreted as a rigid boundary of the area served, since the quality of reception obtainable would have depended on local conditions. Fading and interference may at times have been experienced in the outer areas served and also, in difficult locations, nearer the transmitter.
BBC Engineering information sheet September 1958

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