If anyone can find a good detailed map of the Hawaiian Islands soil conductivity I would appreciate a link.
So far all I have found is a grainy gif of the Islands with very little detail...and a data sheet that has some longitude and latitude data. Soil here grows anything instantly, is four feet deep red clay of volcanic origin. With 90 inches of rain a year it never dries out. Best I can tell it looks to be a 4 or 6 on the scale. The data sheet looks like it may be a 2. However, both numbers seem pretty low. That 2 number seems awfully low and is equal to the sandy soil I had in Florida. KH7XS -----Original Message----- From: Lloyd - N9LB <lloydb...@charter.net> To: 'top Band' <topband@contesting.com> Sent: Sun, Apr 1, 2018 4:29 pm Subject: Re: Topband: Soil conductivity maps https://www.fcc.gov/media/radio/m3-ground-conductivity-map#block-menu-block- 4 The link on the page to the download version has reasonable detail... Having performed many field strength surveys for broadcasting ( using a Nems-Clarke and later an Potomac FIM ), I can tell you that the real world varies a significant amount. The urbanized areas are much poorer, and of course the transitions between conductivity areas will vary. Your state Agriculture Department might have more detailed soil maps that could be used as a starting point for estimated local soil conductivity. 73 Lloyd - N9LB -----Original Message----- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Jeff Kinzli N6GQ Sent: Sunday, April 01, 2018 9:46 AM To: top Band <topband@contesting.com> Subject: Topband: Soil conductivity maps So I'm looking to purchase a new QTH. I'm not particular about location, but would like to optimize for soil conductivity and any other parameters that would increase near and far field propagation and minimize ground losses. I've seen the US Gov M3 maps, but they are very coarse. They also only define conductivity, and I'm wondering what other quantities would be useful to look at. I know that a salt water takeoff or marsh is awesome, but that's not gonna happen in this iteration - looking very much central USA (W5, TX), inland. So, any more fine-grained maps available? Or other quantities that would be worth looking at? Books that discuss this sort of thing? Mostly for either pinpointing optimal areas, or making sure that a good looking property is at least half-way decent... Thanks for any guidance, de N6GQ _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband