Return-Path: Received: from rly-da01.mx.aol.com (rly-da01.mail.aol.com [172.19.129.75]) by air-da03.mail.aol.com (v126.13) with ESMTP id MAILINDA033-a4c4b2d0ac21a1; Sat, 19 Dec 2009 12:18:10 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-da01.mx.aol.com (v125.7) with ESMTP id MAILRELAYINDA014-a4c4b2d0ac21a1; Sat, 19 Dec 2009 12:17:56 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NM2rT-0002NH-F3 for rs_out_1@blacksheep.org; Sat, 19 Dec 2009 17:12:59 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NM2rS-0002N7-Vl for rsgb_lf_group@blacksheep.org; Sat, 19 Dec 2009 17:12:58 +0000 Received: from mail-bw0-f221.google.com ([209.85.218.221]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NM2um-0003ER-MS for rsgb_lf_group@blacksheep.org; Sat, 19 Dec 2009 17:16:27 +0000 Received: by bwz21 with SMTP id 21so2862674bwz.4 for ; Sat, 19 Dec 2009 09:17:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=L6US2AanK8FZGeds5425GA5Gr40uFE9n6nHSPakz/qk=; b=rTSJHW8JCozcrbVtDN89iAMSoh8n6AQMe3Oi+vb6S9SGsolz7lfE088amJOwVRG0JJ YHlLtfbskcCiYaMgLMxNmTE6Q9yWOIsZ69YEiMOSjQGDWQQoYTZE3zfF+GXGAbptuoDe w23n7KzQSMEjh/ZdHe4ix0xsmDAG1tVhpW1oo= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=EU7kSBSzQFxHAF5FX4nXrk35efwE6nmi9fRvYCRQwb7XKbaPiSeu3zG79pGTTILtrf Co40OYh+FfoQfi1pjzghlhWmm1fuQv1Yd6UkQu0D9NoHpTBxJoN+08Z/2wD3Yhm9n0bP oDyxmDSkVT62GCEKEUS0SRBz142LWzPr07QaY= MIME-Version: 1.0 Received: by 10.204.24.69 with SMTP id u5mr3349868bkb.1.1261243019104; Sat, 19 Dec 2009 09:16:59 -0800 (PST) In-Reply-To: <002501ca80cc$2df97f90$0301a8c0@your91hoehfy9g> References: <38A51B74B884D74083D7950AD0DD85E828ACB3@File-Server-HST.hst.e-technik.tu-darmstadt.de> <346854e9698cbf94f4483c66682bb63b.squirrel@webmail.xs4all.nl> <001e01ca80b0$392cb0b0$8d01a8c0@JAYDELL> <002501ca80cc$2df97f90$0301a8c0@your91hoehfy9g> Date: Sat, 19 Dec 2009 17:16:59 +0000 Message-ID: <9afca2640912190916g2eaed7e3o920b6eca5fcfd48b@mail.gmail.com> From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org X-Karma: unknown: DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Re: Re: Noise cancelling by using optic transmission of RX signals Content-Type: multipart/alternative; boundary=00032555476621120a047b1806b8 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE 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-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d285.1 ; domain : gmail.com DKIM : pass X-Mailer: Unknown (No Version) --00032555476621120a047b1806b8 Content-Type: text/plain; charset=ISO-8859-1 Total *tosh* Mal. You clearly don't understand how E-probe antennas work. 73s and happy Christmas Roger G3XBM 2009/12/19 mal hamilton > I said recently that the wire connecting these type of mini antennas is in > fact the antenna. It was the same with the Partridge Joy stick of > yesteryears, the long connecting wire to the small loading coil was doing > most of the work. > There is no substitute for a real resonant antenna at the working > frequency. > G3KEV > > > ----- Original Message ----- > From: > To: > Sent: Saturday, December 19, 2009 1:36 PM > Subject: LF: Re: Noise cancelling by using optic transmission of RX signals > > > > >I think the role of the ground with active whips is often neglected - > the > output of the whip preamp > > >is the voltage differential between the whip element and the circuit > ground, so the ground > > >connection is just as much part of the antenna as the whip element > itself > is. > > > > That's an important point that is often overlooked or ignored. A mini > whip > mounted up at 5 meters is > > a 5 meter antenna. You can easily prove this by mounting it at ground > zero > on top of a ground > > screen. Been there, done that. > > > > Jay W1VD WD2XNS WE2XGR > > > > > > > -- ------------------------------------------------------------- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk G3XBM GQRP 1678 ISWL G11088 --00032555476621120a047b1806b8 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Total tosh Mal.=A0 You clearly don't understand how E-pr= obe antennas work.

73s and happy Christmas

Roger G3XBM
<= br>


2009/12/19 mal hamilton <g3kevmal@talktalk.n= et>
I said recently= that the wire connecting these type of mini antennas is in
fact the antenna. It was the same with the Partridge Joy stick of
yesteryears, the long connecting wire to the small loading coil was doing<= br> most of the work.
There is no substitute for a real resonant antenna at the working frequenc= y.
G3KEV


----- Original Message -----
From: <jrusgrove@comcast.net>
To: <rsgb_lf_group@blac= ksheep.org>
Sent: Saturday, December 19, 2009 1:36 PM
Subject: LF: Re: Noise cancelling by using optic transmission of RX signal= s


> >I think the role of the ground with active whips is often neglect= ed - the
output of the whip preamp
> >is the voltage differential between the whip element and the circ= uit
ground, so the ground
> >connection is just as much part of the antenna as the whip elemen= t itself
is.
>
> That's an important point that is often overlooked or ignored. A= mini whip
mounted up at 5 meters is
> a 5 meter antenna. You can easily prove this by mounting it at ground= zero
on top of a ground
> screen. Been there, done that.
>
> Jay W1VD =A0WD2XNS =A0WE2XGR
>
>





--
----------------------= ---------------------------------------
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088
--00032555476621120a047b1806b8--