On Thu, 26 Mar 1998 07:00:52 +0000 Tom Rauch
<10eesfams2mi@mass1-pop.pmm.mci.net> writes:
To: <topband@contesting.com>
>> Date: Wed, 25 Mar 1998 22:59:32 -0500 (EST)
>> From: Tom Frenaye <frenaye@pcnet.com>
>> Subject: TopBand: soil conductivity
>> To: topband@contesting.com
>You could install a low dipole, and measure the impedance of the
>dipole as yopu raise and lower it and calculate conductivity that
>way. That's what I did when I measured my elevated radial system. My
>actual soil conductivity was 4 mS/m, while the ARRL Handbook method
>indicated 0.5 mS/m. That's because the ground surface was mixed with
>rock and dry, while five feet down and lower there was wet clay and
>rock.
>
>
>73, Tom W8JI
>w8ji.tom@MCIONE.com
Tom that agrees right on the nose with the ARRL Antenna Manual ( 17th
Edition here) ground conductivity chart. Most of GA is rated at 4 mS/m
on the chart wheras my QTH is listed as 1 mS/m.
Would you agree that chart is at least a good starting place to begin
ground system planning?
It is interesting to note how good the soils in AZ, NM and TX actually
are portrayed in the Manual. And all those guys are complaining!
73 Carl KM1H
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