tag:blogger.com,1999:blog-9071048343455395511.post6199296786098617943..comments2024-03-24T22:03:31.205+00:00Comments on Roger G3XBM's (Mainly) Amateur Radio Blog: New ERP calculations on 472kHz with earth-electrode antenna in 8cm snowRoger G3XBMhttp://www.blogger.com/profile/13673890140751539870noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-9071048343455395511.post-69252659859927816382013-01-23T13:09:56.119+00:002013-01-23T13:09:56.119+00:00Me Again.. Another comment, there are some inte...Me Again.. Another comment, there are some interesting papers about ELF transmitters available now.. google Clam lake ELF antenna for example. It used exacly what you are doing with the earth probes.. in N-S and E-W ground dipoles, each 14 miles in length, Earthing 'wells' and a site specially chosen over low conductive granite, to maximise the size of the earth loop current!<br />There is an power estimate: 1MW in, 2W radiated (76Hz).. Hugh G6AIGAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-48025694583759699062013-01-23T12:49:34.715+00:002013-01-23T12:49:34.715+00:00If you look at the WSPR source code, the S/N value...If you look at the WSPR source code, the S/N value is 'guestimated' and is seemingly rather arbritraty so I don't know if can be relied on. No doubt Joe K1JT put something approximately right in, and for comparison is OK, but I would not rely on it too much. <br />Hugh G6AIGAnonymousnoreply@blogger.com