I would like some advice of using my crank up US Tower pole as an antenna for 160. The pole is mounted on top of a concrete block that has 4 threaded iron rods on which the pole is set . the block is 5 feet deep.
Does the concrete block insulate the pole from ground? >From each of the 4 rods from the base I have a #8 copper wire to an 8 foot >copper clad ground rods. There is also a 30 foot copper tubing that is sunk >vertically into the ground. I start getting water at about 10 feet. So any ideas as of what to in this situation. Best 73 John NS5Z Sent from my iPhone On Sep 27, 2011, at 2:00 PM, [email protected] wrote: > Send Topband mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.contesting.com/mailman/listinfo/topband > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Topband digest..." > > > Today's Topics: > > 1. Re: Effect of current max not at base of vertical. (Pete W2PM) > 2. Re: Effect of current max not at base of vertical (Pete W2PM) > 3. Re: 4W6A (ik4gme) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 26 Sep 2011 20:12:26 -0400 (EDT) > From: Pete W2PM <[email protected]> > Subject: Re: Topband: Effect of current max not at base of vertical. > To: [email protected], [email protected] > Cc: [email protected], [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > Re signal improvements when over fresh water or swamp I've notice that many > times on VHF or FM radio in the car and always simply suspected the effects > of being in the clear without obstructions like buildings and trees. > > > Pete W2PM > > > > -----Original Message----- > From: ZR <[email protected]> > To: Guy Olinger K2AV <[email protected]> > Cc: topband <[email protected]>; herbs <[email protected]> > Sent: Sat, Sep 24, 2011 11:35 pm > 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 > esistance tests say it aint so hot; about 250 Ohms for the Beverages. There > is > bout 8-10" of compost and then very bony soil to an average of 18" before > solid > ock. Now, the rock what locals call rotten granite as it just flakes off, is > ikely 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 > od that is slightly larger diameter. > I still remember driving around when much younger how suddenly the AM BCB > would > ave much increased signal strengths for a short distance and there was > nothing > isible in the area to account for it. Crossing over a large area of fresh > water > r swamp always peaked signals even when the road wasnt elevated. > Answers are needed. > Carl > M1H > > > ----- 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 > nconductive). So it's talking about Great Lakes fresh water away from urban > olution. Question would be how conductive the swamp water is. I would > ersonally guess that if the area is heavily vegetated and slow draining, the > onductivity would be higher due to dissolved compounds produced by submerged > otting vegetation. > > Anybody care to go out in the middle of your local freshwater swamp and stick > hmmeter probes down there? The conductivity may even be layered, since the > ater with dissolved materials will weigh more and the more fresh will lay on > op. > > If really stinky "fresh" water marsh is as conductive as that super-rich > idwest pastoral soil we keep hearing about, it jumps up to the best of > on-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 > loors, like those down in flat land Carolina loblolly or oak forests. Would > ary incredibly depending on whether dry or not, or well drained with acid > eached 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 > ersonal experience. At a prior QTH I had them on 2 sides and extending to a > ile 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 > ore 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 > ______________________________________________ > R RST IS ... ... ..9 QSB QSB - hw? BK > > > > ------------------------------ > > Message: 2 > Date: Mon, 26 Sep 2011 20:17:03 -0400 (EDT) > From: Pete W2PM <[email protected]> > Subject: Re: Topband: Effect of current max not at base of vertical > To: [email protected], [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > I onvce did a observational study like this with W2JPW who lives 3 miles from > my QTH. We did the test on all bands from 160 to 2 meters using zero gain > omni directional antennas. On 160, with 1500W he was S5. On 80 S9 plus, On > 40 S4, and moderately strong on higher bands except for 17meters where he was > very weak. All the time we were in QSO on a 2 meter 1.5W portable in each of > our basements with rubber antennas. Full quieting each way. By the way on > the weak bands he had no issues with QSO success on them so there wasnt > anything inherently bad about his system. > > > Pete W2PM > > > > -----Original Message----- > From: W9UCW <[email protected]> > To: topband <[email protected]> > Sent: Sat, Sep 24, 2011 11:35 pm > Subject: Re: Topband: Effect of current max not at base of vertical > > > This may or may not be significant to the discussion. In the 1970's I was > sing a 120 foot insulated base vertical as my main transmit antenna. I had > 2,000 feet of #12 copper radials from 90 to 200 feet in length buried > bout 3 inches in the ground surrounding the antenna. It was located near > inooka, Illinois in a wooded rural area. > > s an experiment, I asked several friends who were located from one to > welve miles away to record my signal strength at their location each day for > ne month at a specific power of 100 watts of carrier. Then I had my tower > limbing buddy, Jack, W9YF (SK) put a resonator tuned to 1850 on top of the > ertical. > > had to modify the base matching system. It had been a shunt coil to > round. It now required a parallel resonant circuit from the base of the > tower > o ground with the coax from the rig tapped onto the coil. > > hen my friends reported the signal strength they now recorded, it was > rom a half to a full "S" unit more than their original readings. Now that's > ertainly not very scientific, but their comments, assuming all groundwave > eadings, were sure interesting to me. > > 3, CU on TopBand, Barry, W9UCW > ______________________________________________ > R RST IS ... ... ..9 QSB QSB - hw? BK > > > > ------------------------------ > > Message: 3 > Date: Tue, 27 Sep 2011 10:57:12 +0200 > From: "ik4gme" <[email protected]> > Subject: Re: Topband: 4W6A > To: <[email protected]> > Message-ID: <4396B1A15D704EBCA19080870EC6442E@ballardi7a1c95> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > ......and judging by the response, an excellent showing was made on 160M. > Thanks once again.. > Kev > M0TNX > Assistant QSL manager/web admin > > > > Just out of curiosity, I'd like to read lots of comments from the other > European topbanders . > > 73 John IK4GME > > > > ------------------------------ > > _______________________________________________ > Topband mailing list > [email protected] > http://lists.contesting.com/mailman/listinfo/topband > > > End of Topband Digest, Vol 105, Issue 29 > **************************************** > _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
