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" <[email protected]> Sent: Saturday, September 24, 2011 7:07 PM To: "Guy Olinger K2AV" <[email protected]> Cc: <[email protected]>; <[email protected]> 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: [email protected] ; [email protected] > 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 <[email protected]> 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 > > > > ------------------------------------------------------------------------------ > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 10.0.1410 / Virus Database: 1520/3917 - Release Date: 09/24/11 > _______________________________________________ > UR RST IS ... ... ..9 QSB QSB - hw? BK > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
