[TowerTalk] Aperture and stacking distance

[Jim Smith]

Hey, thanks very much guys. I got really suspicious of the method when 
it told me  an adequate stacking distance for two 70 cm beams with 10 
dBd gain was 0.04 ft.

I was looking for the quick answer but guess I'll just have to model 
it.  Looking at a C4SXL, plus 6m, 2m and 70cm yagis on the same mast.

73, JIm    VE7FO

Jim Smith wrote:

>I ran across something which appears to give a quantitative answer to 
>how far apart to stack beams, whether for the same or different bands.  
>It involves working out the "radius of effective aperture" of each beam 
>and adjusting the distance between any 2 beams to be equal to or greater 
>than the sum of the radius of effective aperture for the 2 beams.
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