Topband: Effect of current max not at base of vertical.

[Darl DEEDS]

Or driving around and the AM BCB got much louder when driving over a 
railroad track. I wonder what would happen if my radial system would be the 
tracks, only one since I don't want to trip the signal. But the train every 
hour would probably cause lots of issues, not to mention the railroad 
police. Never mind.

Darl  NA8W

--------------------------------------------------
From: "ZR" <zr at jeremy.mv.com>
Sent: Saturday, September 24, 2011 7:07 PM
To: "Guy Olinger K2AV" <olinger at bellsouth.net>
Cc: <topband at contesting.com>; <herbs at vitelcom.net>
Subject: Re: Topband: Effect of current max not at base of vertical.

> Well, Im on top of a pine and oak covered hill these days and RF ground 
> resistance tests say it aint so hot; about 250 Ohms for the Beverages. 
> There is about 8-10" of compost and then very bony soil to an average of 
> 18" before solid rock. Now, the rock what locals call rotten granite as it 
> just flakes off, is likely due to a high iron content which also affects 
> well water around here.
>
> Maybe I should try drilling deep into the rock and pounding down a copper 
> clad rod that is slightly larger diameter.
>
> I still remember driving around when much younger how suddenly the AM BCB 
> would have much increased signal strengths for a short distance and there 
> was nothing visible in the area to account for it. Crossing over a large 
> area of fresh water or swamp always peaked signals even when the road 
> wasnt elevated.
>
> Answers are needed.
>
> Carl
> KM1H
>
>
>
>
>  ----- Original Message ----- 
>  From: Guy Olinger K2AV
>  To: ZR
>  Cc: herbs at vitelcom.net ; topband at contesting.com
>  Sent: Saturday, September 24, 2011 3:30 PM
>  Subject: Re: Topband: Effect of current max not at base of vertical.
>
>
>  EZNEC's "fresh water" selection shows a conductivity of .001 (very 
> unconductive). So it's talking about Great Lakes fresh water away from 
> urban polution.  Question would be how conductive the swamp water is.  I 
> would personally guess that if the area is heavily vegetated and slow 
> draining, the conductivity would be higher due to dissolved compounds 
> produced by submerged rotting vegetation.
>
>
>  Anybody care to go out in the middle of your local freshwater swamp and 
> stick ohmmeter probes down there?  The conductivity may even be layered, 
> since the water with dissolved materials will weigh more and the more 
> fresh will lay on top.
>
>
>  If really stinky "fresh" water marsh is as conductive as that super-rich 
> midwest pastoral soil we keep hearing about, it jumps up to the best of 
> non-salt-water results.  How conductive is YOUR local fresh water swamp.
>
>
>  73, Guy
>
>
>  PS, this also applies to fairly acidic recently wet down pine straw 
> forest floors, like those down in flat land Carolina loblolly or oak 
> forests. Would vary incredibly depending on whether dry or not, or well 
> drained with acid leached out.
>
>
>  On Sat, Sep 24, 2011 at 11:29 AM, ZR <zr at jeremy.mv.com> wrote:
>
>    Ive doubted some of the claims about fresh water swamps based only on 
> personal experience. At a prior QTH I had them on 2 sides and extending to 
> a mile or more and the 160 vertical "appeared" to play better then 
> expected.
>    All that rotting vegetation had to be good for something and it rarely 
> froze more than a few inches in the winter.
>
>    Carl
>    KM1H
>
>
>
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