Topband: Fwd: radals fer 160m vertcal

[Richard Fry]

Bud, W2RU wrote:

> 3.  Using radials that are longer than a vertical (of reasonable 
> electrical length) is tall simply wastes a lot of money (and real estate).

Those tending toward such beliefs should be interested in the clip at the 
link below, as well as the BL&E study linked earlier in this thread.

Note the logical conclusions therefrom that the radiation efficiency of 
every vertical monopole system of every electrical height depends on the 
loss of the r-f ground reference against which it is driven.

These data show that for monopole heights no matter how short in electrical 
wavelength, system radiation efficiency using buried radials is dependent on 
the r-f loss in the circular surface area at/just below the surface of the 
earth within ~1/2-wavelength radius of such monopoles.

In fact, the shorter the electrical heights of such monopoles, the more 
important such r-f loss becomes toward defining the radiation efficiency of 
those electrically short monopole systems.

http://i62.photobucket.com/albums/h85/rfry-100/GroundCurrentNearMonopole.gif