SECC
[Top] [All Lists]

[SECC] Antenna improvements (Was: NAQP)

Subject: [SECC] Antenna improvements (Was: NAQP)
From: k9ay at k9ay.com (K9AY)
Date: Mon, 27 Aug 2007 10:30:13 -0500
>> ...He cited a study by A. Chrisman that concluded that four elevated 
>> radials were the equivalent of 120 buried radials if the elevation was at 
>> least 15' on 80 meters.

This was modeling study, and results have been amended by the experiences of 
people who built them. Some could find little or no difference, others found 
the elevated radials were terrible. The pertinent variables and the 
reliability of the reports are not clear.

> Bottom line: elevated or ground-mounted, the antenna will work.

Yes -- The worst case is NO radials! One radial or several short radials is 
a zillion times better than a ground rod. As you add more radials, things 
improve rapidly until maybe 16-20 radials, then more slowly until pretty 
much maxing out at 64. More than 64 is  'insurance' rather than gain.

73, Gary
K9AY


<Prev in Thread] Current Thread [Next in Thread>