I think right now the processing gain limit is about 20 DB with currently available software. As for around the world stuff, UK hams have been seen on the east coast on 73 Khz and Zl6OH has been seen many times in W, K and VE on 137 khz. If you are an active ham you might be interested in this...
re: Ve1BLL
Yes that's right 50 feet of antenna or .007 wavelength gives about 17 millioms of radiation resistance, or about 30 db below an isotropic source. Checked into all of the internet references I could find, information on longwave radio is sketchy and sometimes contradictory, also went...
Looking for information on how to design a very short vertical longwave transmitting antenna,135 to 190 khz must be less than 50 feet tall. Also looking for articles on Longwave propagation.
Thanks in advance Vern
