[TowerTalk] 10M phased verticals

Paul Christensen w9ac at arrl.net
Tue Nov 29 12:47:12 PST 2011


> You've got a radial field with the elements sort of placed on top of it. 
> Element 1 is at the center and connected to all the radials, but two of 
> elements are essentially sitting on top of one of the radials, and the 
> fourth element (at Sp,sp) isn't on any radial (since 45 isn't a multiple 
> of 6 degrees)

Jim,

>From what I can see, NEC/2 looks at those Z=0 radial connections as all 
being the same for each source.  No?  I would really welcome input on this 
from you or anyone else with a better understanding of the NEC internals.  I 
see no other way to specify separate radial fields for each radiator in 
4Nec2, nor EZNEC.  Or, I'm missing it in a tab somewhere.

Anyway, per your suggestion, I removed the radial field and placed it over 
perfect ground and the pattern is actually worse.  I'm about to send you a 
.JPG of a family of curves showing the 10m 4-square (5/8) over perfect 
ground, 60 radials over average ground, and 1/4-wave over average ground.  I 
would send it through the list but I think attached files gets stripped --  
or worse, I'll violate a list rule!

Paul, W9AC



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