Return-Path: Received: from mtain-da02.r1000.mx.aol.com (mtain-da02.r1000.mx.aol.com [172.29.64.74]) by air-md10.mail.aol.com (v129.4) with ESMTP id MAILINMD102-8b994ca16d01bc; Tue, 28 Sep 2010 00:20:17 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-da02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 89D4A38000096; Tue, 28 Sep 2010 00:20:15 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1P0ReG-0002Iv-Mp for rs_out_1@blacksheep.org; Tue, 28 Sep 2010 05:18:36 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1P0Re6-0002IU-7u for rsgb_lf_group@blacksheep.org; Tue, 28 Sep 2010 05:18:26 +0100 Received: from defout.telus.net ([204.209.205.13]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1P0Re5-0000F2-0g for rsgb_lf_group@blacksheep.org; Tue, 28 Sep 2010 05:18:27 +0100 Received: from edmwaa03.telusplanet.net ([75.157.170.89]) by priv-edmwes24.telusplanet.net (InterMail vM.7.09.01.00 201-2219-108-20080618) with ESMTP id <20100928041821.QVSW23075.priv-edmwes24.telusplanet.net@edmwaa03.telusplanet.net> for ; Mon, 27 Sep 2010 22:18:21 -0600 Received: from [192.168.1.66] (d75-157-170-89.bchsia.telus.net [75.157.170.89]) by edmwaa03.telusplanet.net (BorderWare Security Platform) with ESMTP id 23720254A3D2CC79 for ; Mon, 27 Sep 2010 22:18:21 -0600 (MDT) Message-ID: <4CA16C8C.6080008@telus.net> Date: Tue, 28 Sep 2010 04:18:20 +0000 From: Scott Tilley User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.8) Gecko/20100802 Thunderbird/3.1.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <7.0.1.0.2.20100927193758.03c48ea8@erols.com> In-Reply-To: X-Cloudmark-Analysis: v=1.1 cv=jZWY0mN4ihfVVFow0YashxFPW0aCjrDY2zHLsUqX+3Q= c=1 sm=0 a=VlsvQeCHHzZYdozF1C9JGw==:17 a=aatUQebYAAAA:8 a=ybZZDoGAAAAA:8 a=xupdazLqAAAA:8 a=JJI2F8yZZ26ax30SqAYA:9 a=tUNScAiPy9UkByVWquIA:7 a=5a-CDytnlZ0QVpo0kFC3rDSEkQUA:4 a=wPNLvfGTeEIA:10 a=qIVjreYYsbEA:10 a=pGLkceISAAAA:8 a=eRALB8gu6CQFtORmubcA:9 a=ZU8SGKR3772c-zX9V_UA:7 a=AGJk0nTkteYc5f7UyZpat-Npl6YA:4 a=HpAAvcLHHh0Zw7uRqdWCyQ==:117 X-Spam-Score: 1.7 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,MAILTO_TO_SPAM_ADDR=0.276,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Earth Antennas Content-Type: multipart/alternative; boundary="------------070700070402020700020101" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.4 required=5.0 tests=FROM_ENDS_IN_NUMS,HTML_20_30, HTML_MESSAGE,MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G x-aol-sid: 3039ac1d404a4ca16cff2c20 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --------------070700070402020700020101 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Warren I would say any experiments on 2200m are impressive. Sandy is sharing with us something neither of use or many others have tried. No matter the results the experiment itself is impressive and interesting. I wish more would take the time to slog around in the mug to put a signal on the band, no matter how. 73 Scott VE7TIL CN89dk http://www3.telus.net/sthed/argo/ On 9/28/2010 12:34 AM, Warren Ziegler wrote: > Sandy, > These results are not very impressive! > I have done much better than that with either a top loaded 80' > vertical or a transmit loop! > > Also, it is hard to see how an LF antenna could favor skywave over > groundwave! > > > -- > 73 Warren K2ORS > WD2XGJ > WD2XSH/23 > WE2XEB/2 > WE2XGR/1 > > > On Mon, Sep 27, 2010 at 8:20 PM, Nan and Sandy Sanders > > wrote: > > Hi all. About 8 or 9 years ago AMRAD installed what we called an > earth bipole. From our web page http://www.amrad.org/projects/lf/ > > "AMRAD has built a 1500 foot long bipole antenna. This is a wire > that goes through the woods and is connected on one end to a 300 > foot steel well casing and a ground rod in lake on the other. It > is tuned to resonance with two large coils near the ends and a > ferrite toroid transformer gets it all to 50 ohms for the > transmitter. Initially it was not strong back here in the > Washington DC area. But now it looks like the signal is pretty > good further out. It may favor sky wave to ground wave. Recent > results have been good with reception into London, Ontario Canada > by Mitch Powell VE3OT. His zipped .wav file can be downloaded > here. Note that it is > almost 750k. This reception is about 324 miles or 521 km. Closer > in we have reception confirmed from Steve Dove W3EEE/G3YDV at Mt. > Gretna PA. " > Note: here= http://www.amrad.org/projects/lf/wa2.zip > > The wire was attached to trees about 15 feet off the ground and it > was fed about 100w and keyed at 5 wpm. We always had problems > getting people to listen for us outside the local area. We lost > interest after our FCC would not give us 137Khz as an amateur band. > One thing I learned during the installation of this antenna is > that if you step into waist deep mud and cannot get your self out, > your fellow amateurs will laugh and take photos of you before they > will help you get out. > I think that AMRADs and Stefan's experience show that this type of > antenna is worth some investigation. > Sandy > WB5MMB > > > > > > --------------070700070402020700020101 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Warren

I would say any experiments on 2200m are impressive.  Sandy is sharing with us something neither of use or many others have tried.  No matter the results the experiment itself is impressive and interesting. 

I wish more would take the time to slog around in the mug to put a signal on the band, no matter how.

73 Scott
VE7TIL CN89dk
http://www3.telus.net/sthed/argo/



On 9/28/2010 12:34 AM, Warren Ziegler wrote:
Sandy,
      These results are not very impressive!
I have done much better than that with either a top loaded 80' vertical or a transmit loop!

 Also, it is hard to see how an LF antenna could favor skywave over groundwave! 


-- 
73 Warren K2ORS
                WD2XGJ 
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1


On Mon, Sep 27, 2010 at 8:20 PM, Nan and Sandy Sanders <radiodog77@pobox.com> wrote:
Hi all. About 8 or 9 years ago AMRAD installed what we called an earth bipole. From our web page http://www.amrad.org/projects/lf/

"AMRAD has built a 1500 foot long bipole antenna. This is a wire that goes through the woods and is connected on one end to a 300 foot steel well casing and a ground rod in lake on the other. It is tuned to resonance with two large coils near the ends and a ferrite toroid transformer gets it all to 50 ohms for the transmitter. Initially it was not strong back here in the Washington DC area. But now it looks like the signal is pretty good further out. It may favor sky wave to ground wave. Recent results have been good with reception into London, Ontario Canada by Mitch Powell VE3OT. His zipped .wav file can be downloaded <http://www.amrad.org/projects/lf/wa2.zip>here. Note that it is almost 750k. This reception is about 324 miles or 521 km. Closer in we have reception confirmed from Steve Dove W3EEE/G3YDV at Mt. Gretna PA. "
Note:  here= http://www.amrad.org/projects/lf/wa2.zip

The wire was attached to trees about 15 feet off the ground and it was fed about 100w and keyed at 5 wpm. We always had problems getting people to listen for us outside the local area. We lost interest after our FCC would not give us 137Khz as an amateur band.
One thing I learned during the installation of this antenna is that if you step into waist deep mud and cannot get your self out, your fellow amateurs will laugh and take photos of you before they will help you get out.
I think that AMRADs and Stefan's experience show that this type of antenna is worth some investigation.
    Sandy
    WB5MMB





 
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