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@jeremy.mv.com>
Sent: Saturday, September 24, 2011 7:07 PM
To: "Guy Olinger K2AV" <olinger@bellsouth.net>
Cc: <topband@contesting.com>; <herbs@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@vitelcom.net ; topband@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@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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>
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