Hi Mike, I agree with you. Cushcraft recommends mounting its half-wave verticals (such as the R5, R7, R7000 and R8) with the base at least 2.5m (8ft) above the ground or any surface such as a roof, to avoid detuning. My experience with the R5 and R8 confirms this. Cheers for now, 73, Adam VA7OJ/AB4OJ Scanned by WinProxy http://www.Ositis.com/