Return-Path: X-Spam-DCC: paranoid 1169; Body=3 Fuz1=3 Fuz2=3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_JUNO_RCVD,HTML_MESSAGE,NO_REAL_NAME autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id t52FAEtC010497 for ; Tue, 2 Jun 2015 17:10:14 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YzniG-0001Nq-Af for rs_out_1@blacksheep.org; Tue, 02 Jun 2015 16:02:44 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YzniF-0001Nh-Sm for rsgb_lf_group@blacksheep.org; Tue, 02 Jun 2015 16:02:43 +0100 Received: from outbound-mail02.vgs.untd.com ([64.136.55.36]) by relay1.thorcom.net with smtp (Exim 4.85) (envelope-from ) id 1YzniD-0001pe-FI for rsgb_lf_group@blacksheep.org; Tue, 02 Jun 2015 16:02:42 +0100 X-DKIM-Result: Domain=juno.com Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=juno.com; s=alpha; t=1433257358; bh=47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=; l=0; h=To:Date:Subject:Content-Type:From:Message-Id; b=pYFUJaq71gpy+AWVSu+w20enxuYPsUcm3S3GmDL6qnzNG4I8Vzkw+5cSTUSa6tHY4 vfiBI1irc6Sx13v0lY66kV+AxVwaYEs/lzbkzyUzS7poCuTk4dlnPgSNTL6wSY9Lhp JVoTswcqCjhLilSv9eZp5gkZ4I3b/OYNGuGmJ8g0= Received: from outbound-bu1.vgs.untd.com (mailpop03.vgs.untd.com [10.181.45.23]) by smtpout03.vgs.untd.com with SMTP id AABLY5TMUALDA3MA for (sender ); Tue, 2 Jun 2015 08:02:10 -0700 (PDT) To: rsgb_lf_group@blacksheep.org Date: Tue, 2 Jun 2015 11:00:11 -0400 X-Mailer: Email Client 8.8.1 MIME-Version: 1.0 X-Juno-Line-Breaks: 7-6,7-8,10-13,16-23,26-39,41-43,47-32767 X-Originating-IP: 71.173.130.78 From: Message-Id: X-UNTD-BodySize: 5356 X-ContentStamp: 10:5:2914473667 X-MAIL-INFO: 2e2d04b4a4701d10d1d5d4147091a12da45584c034556dd4fd6534cd75344401703d94c419cdad64008559e9e420708529a051ad518075d93159691155c5292d112115001d11302d0471400d4981b4ed318d1900b4403095b58d35b4099d702439d00c6995a5b009d49190dd592499a10cd47d6dc4d914b9c5 X-UNTD-OriginStamp: yokUgcxCbtTP7XLrpefewGIJ4Hhn0NcAkKdurnSyZv3LtfUxedsDvw== X-UNTD-Peer-Info: 10.181.45.23|mailpop03.vgs.untd.com|outbound-bu1.vgs.untd.com|riese-k3djc@juno.com X-Scan-Signature: 18c242620d7d7b91a1caf5740aa3e326 Subject: Re: LF: Antennas on low bands : the Siegel and Labus books. Content-Type: multipart/alternative; boundary=--__JNP_000_67c2.5901.3eae 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: RO X-Status: X-Keywords: X-UID: 3406 This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_67c2.5901.3eae Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit On Fri, 29 May 2015 19:59:23 +0000 Rik Strobbe writes: Hi Bob, small is a relative thing on LF. A DDRR with a perimeter of 0.25 lambda and a height of 0.025 lamdba is indeed small on 144MHz, but on 137kHz the perimeter becomes 550m and the height a respectable 55m. Not a backyard antenna ... 73, Rik ON7YD - OR7T Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens riese-k3djc@juno.com [riese-k3djc@juno.com] Verzonden: vrijdag 29 mei 2015 18:30 Aan: rsgb_lf_group@blacksheep.org Onderwerp: Re: LF: Antennas on low bands : the Siegel and Labus books. has anyone tried a DDRR antenna on LF there is info on them in one of the arrl antenna books and I use one on 144 very small but appears to work as well as a 5/8 wave appears as a small horziontal loop but radiates as a vert most odd thing but works well on 2 meters Bob K3DJC On Fri, 29 May 2015 17:19:24 +0200 =?iso-8859-1?B?R3V56SBBbmRy6Q==?= writes: Hi to all. I see that many questions are on the LF reflector about antennas on low bands, modeling and concerning the lobe formation zones (Fresnel, Fraunhofer and Rayleigh). On the way, that explain why IUT is using the E.I.R.P. as standard of power. ----__JNP_000_67c2.5901.3eae Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable
 
 
On Fri, 29 May 2015 19:59:23 +0000 Rik Strobbe <Rik.Strobbe@fys.kuleuven.be= >=20 writes:

Hi Bob,

 

small is a relative thing on LF.

A DDRR with a perimeter of 0.25 lambda and a height of 0.025 lamdba is= =20 indeed small on 144MHz, but on 137kHz the perimeter becomes 550m and the= =20 height a respectable 55m.

Not a backyard antenna ...

 

73, Rik  ON7YD - OR7T

 

Van: owner-rsgb_lf_group@blacksheep.org=20 [owner-rsgb_lf_group@blacksheep.org] namens riese-k3djc@juno.com=20 [riese-k3djc@juno.com]
Verzonden: vrijdag 29 mei 2015=20 18:30
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re= : LF:=20 Antennas on low bands : the Siegel and Labus books.

has anyone tried a DDRR antenna on LF
there is info on them in one of the arrl antenna books and I use one= on=20
144 very small but appears to work as well as a 5/8 wave
appears as a small horziontal loop but radiates as a vert
most odd thing but works well on 2 meters
 
Bob K3DJC
 
On Fri, 29 May 2015 17:19:24 +0200 =3D?iso-8859-1?B?R3V56SBBbmRy6Q= =3D=3D?=3D=20 <andre.guye1@aliceadsl.fr> writes:

Hi to all.

 

I see that many = questions are on=20 the LF reflector about antennas on low bands, modeling and concerning = the=20 lobe formation zones (Fresnel, Fraunhofer and Rayleigh). On the way, that explain why IUT is using = the=20 E.I.R.P. as standard of=20 power.

 
----__JNP_000_67c2.5901.3eae--