[CQ-Contest] Be careful

Pete Smith n4zr at contesting.com
Mon Jan 3 08:58:58 EST 2005

At 09:07 PM 1/2/2005, K3BU at aol.com wrote:
>HFTA shows virtually no difference between salt water
>and very poor grounds.  You should ask N6BV why that is
>but it may because the incident angles are small enough
>that ground gain is achieved independent of conductivity

Leeson says in his book (p. 10-2) "The reflection is from the conductive or 
dielectric discontinuity between the air and the surface of the ground 
(giving effect to the skin depth), not from some magical underground water 
layer."  I infer from this that ground conductivity is relatively 
unimportant for horizontal polarization, which is all HFTA claims to model.

73, Pete N4ZR

More information about the CQ-Contest mailing list