Not an expert Wayne, but earned my $ calculating path loss at HF up to microwave during point-to-pont, mobile and relay systems design "back then" using the classic 4/3 Earth Radius approach at VHF-Microwave. Unfortunately my relevant data is packed, but I understand that the path between Kevin and Doug is about 150 miles. So in spite of the elevation of Kevin's QTH, at 50 MHz the path would not appear to be true line of sight but Fresnel Zone obstructed, which together with any loss added by local obstructions such as dense tree growth and buildings could put the beacon's signal below Kevin's noise floor.
73, Geoff GM4ESD On June 21, 2011 at 23:40 Z, Wayne Burdick wrote: > Do we have any experts at path-loss calculations (over typical > Seattlian terrain) on the list? > > Wayne > N6KR > > On Jun 21, 2011, at 3:34 PM, Kevin Rock wrote: > >> I should be line of sight to Seattle. I know I am south of it and >> he is using a gain antenna. Do you think he will reach beyond the >> outskirts of Seattle? >> Kevin. >> >> >> >> >> On Tue, 21 Jun 2011 15:26:00 -0700, Wayne Burdick >> <n...@elecraft.com> wrote: >> >>> Also, at 0 dBm power output, his XG3 may only be audible to fairly >>> close stations unless there's a serious band opening. >>> >>> Wayne >>> N6KR ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
