UK Broadcast Transmission
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BBC VHF 405 line TV TRANSMITTERS

BLAENPLWYF
Channel 3H Max ERP: 3kW (directional)
Vision carrier: 56.75MHz Sound Carrier: 53.25MHz

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. 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 2926 (1) September 1968

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