Excellent skin depth reference here:
www.antennasbyn6lf.com/files/ground_skin_depth_and_wavelength.pdf Ground characteristics are much more significant for vertical polarization than for horizontal polarization. 73 Frank W3LPL ----- Original Message ----- From: "Richard (Rick) Karlquist" <[email protected]> To: "Robert L. Chortek" <[email protected]>, "topband" <[email protected]> Sent: Tuesday, March 24, 2020 1:23:52 AM Subject: Re: Topband: Ground Conductivity On 3/23/2020 3:01 PM, Chortek, Robert L. wrote: > A quick question for the collective wisdom on this esteemed reflector: > > How would one categorize the quality of ground consisting of grass. For > example, if you live next to a large (many acres) open space made entirely of > well watered grass, would that qualify as “average ground“, “above average > ground” or something else? > RF conductivity depends on the soil per se, not what is growing on it. Grass (especially if watered) will grow on any kind of soil, so it indicates nothing. The lack of grass also doesn't necessarily indicate anything. Where I live, the soil is 100% clay and the RF conductivity is high. Ten miles to the south, the soil is regular dirt. Vastly better for growing anything, even weeds. But the RF conductivity is considerable lower. A casual observer sightseeing would have no idea of this change in soil. N6LF has developed techniques for measuring your ground parameters by characterizing very low dipoles. If you really want to know about your ground, this is what you need to do. Way too much work for me or nearly anyone else. Rick N6RK _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
