[Elecraft] Off-Topic: Your advice/suggestion about antenna

[Jim Brown]

That's a bit oversimplified, Don, because of the very strong effect of 
soil conductivity and mounting height on the performance of a vertically 
polarized antenna. That's addressed in the app note I referenced earlier.

http://k9yc.com/AntennaPlanning.pdf

And this one.

http://k9yc.com/43FtVertical.pdf

Mounting height and soil conductivity move the lobes around AND vary the 
ground losses. There are many combinations that can cause a vertical to 
be stronger at high angles (45-60 degrees) than a low dipole. The one 
characteristic of verticals is that their radiation goes to zero 
straight up.

You don't see these things clearly until you plot patterns for antennas 
being compared on the same graph, as I did in those links.

73, Jim K9YC

  on On 3/13/2020 6:44 PM, Don Wilhelm wrote:
> That means to me that a dipole mounted at a modest height for 160, 80, 
> and 40 will provide local as well as moderately distant contacts easily. 
>   A proper vertical will provide more DX contacts, and weaken the 
> receive signals for more close-in stations - it is all in the angle of 
> radiation - how many miles does the signal travel before it is reflected 
> by the ionosphere?  It is all a matter of physics and geometry.