Topband: Best wire antenna for roof top location

[Jim Brown]

Actually, what he says is not use the high level media to model a RADIAL 
system.

While playing with this model, I changed the characteristics of the 
higher level media to have far less conductivity. The result suggested 
that my model was good for what I was trying to understand -- that is, 
the very low far field lobe was unaffected by the conductivity of the 
high level media (that is, the roof).

73, Jim K9YC

On Mon,8/10/2015 6:48 PM, Guy Olinger K2AV wrote:
> There is a rather stern W7EL caution in the EZNEC doc about using two
> ground media. He particularly nixes using the inner media as sea water
> to mimic a high conductive surface.