Topband: 160m L impedance??

[Cliff Frescura]

> -----Original Message-----
> From: topband-bounces at contesting.com [mailto:topband-
> bounces at contesting.com] On Behalf Of John
> Sent: Monday, December 08, 2008 12:40 PM
> To: topband at contesting.com
> Subject: Topband: 160m L impedance??
> 
> OK Gurus......
> 
> Quarter-wave L, vertical to 66 feet, balance horizontal.  32 radials on
> the ground, length ranging from 35 to 68 feet with a good mix of those
> lengths.  Using 14 solid copper, insulated wire.  At the feed point, I
> see the lowest SWR of 3.2 at 1.820 MHz.  But, the impedance measures 80
> +/- ohms!  I see 7 mh and 1050 pf.


Add a ground rod and attach the radial system to it.

73,

Cliff K3LL

> 
> At the shack end using 75 feet of BuryFlex, I measure lowest SWR of 1.2
> at the same freq, 1.820.  The impedance there measures 60 ohms.  I used
> both my Autek RF-1 and MFJ-259.  I have no BC stations within 10 miles
> or so.  My soil is mostly sand, although it is a top soil, sand mix.
> 
> The "bad" news is the antenna works OK....128 in two seasons.
> 
> Why the high impedance?
> 
> Thanks, and 73...........John K4NP   (this should bring on some beauts)
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