I'm not sure I'd go too far with the FCC map. At my QTH, which is shown as average, actual ground/earth varies within a hundred feet from deep old riverbottom loam to limestone with a thin covering of topsoil (or sometimes none). While I don't know how this affects electrical ground conditions, the difference must be fairly pronounced - and I am very glad my shunt fed tower is based in the old riverbed.
73, Pete N4ZR The World Contest Station Database, at www.conteststations.com The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com, spots at telnet.reversebeacon.net, port 7000 and arcluster.reversebeacon.net, port 7000 On 8/10/2012 8:14 PM, Rick Karlquist wrote: > ZR wrote: >> Sometimes I wonder if its my very poor RF ground conditions that tilt the >> wave more and result in the performance of a much longer antenna. >> >> Carl >> KM1H > My ground is high conductivity according to the FCC map, so > maybe that doesn't explain the performance. > > Rick > N6RK > > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK