Some 35 years ago, Gordon Nelson did a long term (a season or two) study of the accuracy of DFing European signals with a loop. His average error was a few degrees, although I don't recall the exact number after all this time.
Makes me take Maxwell's idea with a grain of salt or two. As for the southerly skewing of high latitude paths during disturbed conditions, every kind of directional antenna supports the fact that the signals truly arrive from a more southerly direction. Chuck -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Nick Hall-Patch Sent: Saturday, December 16, 2006 9:36 AM To: Mailing list for the International Radio Club of America Subject: Re: [IRCA] Mystery tone at 1610, 1020 and WWII At 16:25 16/12/2006, you wrote: >In the January 2007 QST magazine published by the ARRL, there is an >interesting article regarding the problems of direction finding with loop >antennas during WWII which gives a basis for understanding our experience >in imprecisely pinpointing the mystery tone a few weeks ago. Great write-up, Gil. Makes one wonder though, how DXers have done so well using the tuned box and spiral loop antennas over the years in pinpointing overseas stations. Ray Moore has had some excellent results in Florida. I must admit that very often I've just used the loop to determine Asia vs. Australia rather than trying to get really accurate results. Also, bearings seem easier to find, particularly during sunrise conditions, on channels below about 1400 kHz. Often the higher frequencies overseas stations can't really be nulled at all. Sometimes bearings on northerly path stations come out more southerly than they "should", especially during unsettled conditions. Perhaps this is evidence of elliptical polarization rather than a true skewing of the path? Adcock antennas would tell us apparently. A retirement project, I fear, even though former IRCA member Ben Peters introduced them to me 25 years ago. best wishes, Nick **************************************************************************** Nick Hall-Patch Victoria, B.C. Canada **************************************************************************** _______________________________________________ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com _______________________________________________ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com