>It depends on the boom length, but on HF typically you want at least 1/2
>wavelength spacing, which will give you reasonable gain and an improved
>pattern. 3/4 wave spacing is usually about optimum for gain but the
>pattern degrades (compared to 1/2 wave) as you move towards this
I think the most important thing to worry about at HF is
the arrival angle. Getting the correct arrival angle
for a path is worth many more db than the few that
you gain by getting the *best* spacing between the antennas.
>Most guys running stacked long-boom 20's use 50 and 100' which is usually
>optimum (note this is about 3/4 wavelength spacing).
The reason for puttting them at 100/50 is to get the great
range of arrival angle coverage that the 1.5 over .75 wave
above ground provides.
George Fremin III
Austin, Texas C.K.U. "I'm on a mexican radio"
K5TR - Wall of Voodoo
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Administrative requests: towertalk-REQUEST@contesting.com