The report, produced by the RSGB VHF Manager John Regnault G4SWX, notes that Ofcom have increased the noise floor criteria used to calculate coverage areas for Low Band VHF from -104dBm to -92dBm. This recognises the increase in human-generated noise in this part of the spectrum.
The increase in Noise Floor level means you now need 150 watts to achieve the coverage once obtained with a 10 watt transmitter.
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Read the AMSAT-UK report at
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