Return-Path: X-Spam-DCC: paranoid 1102; Body=2 Fuz1=2 Fuz2=2 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 t4U0LR4Q029863 for ; Sat, 30 May 2015 02:21:27 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YyUTY-000736-2y for rs_out_1@blacksheep.org; Sat, 30 May 2015 01:18:08 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YyUTX-00072x-Lr for rsgb_lf_group@blacksheep.org; Sat, 30 May 2015 01:18:07 +0100 Received: from outbound-mail02.vgs.untd.com ([64.136.55.36]) by relay1.thorcom.net with smtp (Exim 4.85) (envelope-from ) id 1YyUTV-0007oo-6v for rsgb_lf_group@blacksheep.org; Sat, 30 May 2015 01:18:06 +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=1432945081; bh=47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=; l=0; h=To:Date:Subject:Content-Type:From:Message-Id; b=HVyHDxiyN39BCU8EplsegDsAjW9byDFiPx/EsY/gTCaR0AF0WAL2faXwQRy8I/xDk r6yOZCDDbpWLrqZQB62hRDpRADKul4iqzsPsGphXDe/vwa8/QJs6TDsYrhP8SnFUr1 02sms6aQE7Mf5bE1b1VWOFnTtyZnj+imhYfbNfKQ= Received: from outbound-bu1.vgs.untd.com (mailpop07.vgs.untd.com [10.181.45.27]) by smtpout03.vgs.untd.com with SMTP id AABLYUAPSAMQQKG2 for (sender ); Fri, 29 May 2015 17:17:52 -0700 (PDT) To: rsgb_lf_group@blacksheep.org Date: Fri, 29 May 2015 20:12:48 -0400 X-Mailer: Email Client 8.8.1 MIME-Version: 1.0 X-Juno-Line-Breaks: 7-6,7-15,17-20,23-30,33-46,48-50,54-32767 X-Originating-IP: 72.95.41.110 From: Message-Id: X-UNTD-BodySize: 5635 X-ContentStamp: 11:5:729624640 X-MAIL-INFO: 545c11b5251c9c49e9d578cc1c5d8c5c250045cdb1007d78bd0cb12dbcb179811c89fc08412de129d84c3d751dc81c4c99b8a5e1a539bc31683daddc0065995cdca87cd89cdc985c119dd9a928ddb588687141d8b5d998c11571c9b5c5011ca14de5d1adc1ec09c5785d2c6c3da1558cd178217d0831cc6d65 X-UNTD-OriginStamp: yokUgcxCbtTP7XLrpefewGIJ4Hhn0NcASnN8WM4/P+/tIlm0Y/7z4Q== X-UNTD-Peer-Info: 10.181.45.27|mailpop07.vgs.untd.com|outbound-bu1.vgs.untd.com|riese-k3djc@juno.com X-Scan-Signature: b42857a5fad6e32377447282c21f62b1 Subject: Re: LF: Antennas on low bands : the Siegel and Labus books. Content-Type: multipart/alternative; boundary=--__JNP_000_2ecb.5eae.232f 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: O X-Status: X-Keywords: X-UID: 3356 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_2ecb.5eae.232f Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit was thinking 600 meters,,, the info for 160 meters looks backyard ish Bob K3DJC 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_2ecb.5eae.232f Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable
 
was thinking 600 meters,,, the info for 160 meters looks backyard ish<= /DIV>
 
Bob K3DJC
 
 
 
 
 
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.

 
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