In reply to Harvey Norris's message of Thu, 5 Feb 2009 23:43:58 -0800 (PST): Hi Harvey, [snip] If you really are getting excess power in the frequency range of zero to a few hundred Hz, especially with a ground connection, then it's just possible you are "tuning in" to a cyclotron frequency of the lower Van Allen belt. This frequency varies over the extent of the belt due to variations in the strength of the Earth's magnetic field with altitude and latitude. Regards,
Robin van Spaandonk http://rvanspaa.freehostia.com/Project.html
