Return-Path: <owner-rsgb_lf_group@blacksheep.org> Received: (qmail 17753 invoked from network); 6 Jul 2003 20:56:35 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 6 Jul 2003 20:56:35 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 10213 invoked from network); 6 Jul 2003 20:56:26 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 6 Jul 2003 20:56:26 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19ZGYD-00031p-OX for rsgb_lf_group-outgoing@blacksheep.org; Sun, 06 Jul 2003 21:56:01 +0100 Received: from [213.218.75.232] (helo=smtp03.freeler.nl) by post.thorcom.com with esmtp (Exim 4.14) id 19ZGY8-00031c-KG for rsgb_lf_group@blacksheep.org; Sun, 06 Jul 2003 21:55:56 +0100 Received: (qmail 20511 invoked from network); 6 Jul 2003 20:55:25 -0000 Received: from unknown (HELO w8k3f0.freeler.nl) ([62.21.139.156]) (envelope-sender <d.w.rollema@freeler.nl>) by smtp03.freeler.nl (qmail-ldap-1.03) with SMTP for <rsgb_lf_group@blacksheep.org>; 6 Jul 2003 20:55:25 -0000 Message-ID: <5.1.0.14.0.20030706224816.02209910@POP3.freeler.nl> X-Sender: FRE0000086604@POP3.freeler.nl X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Sun, 06 Jul 2003 22:52:24 +0200 To: rsgb_lf_group@blacksheep.org From: "Dick Rollema" <d.w.rollema@freeler.nl> In-reply-to: <001c01c343d3$2e013f60$9bce28c3@captbrian> MIME-Version: 1.0 Subject: Re: LF: SAQ nil Content-Type: text/html; charset=windows-1252 X-Spam-Status: No, hits=-0.5 required=5.0tests=EMAIL_ATTRIBUTION,HTML_10_20,HTML_MESSAGE,IN_REP_TO, QUOTED_EMAIL_TEXT,REPLY_WITH_QUOTESversion=2.55 X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp) 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: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Content-transfer-encoding: 8bit <html> <font size=3><b>To All from PA0SE<br><br> Bryan, G3GVB wrote:<br><br> <br> </b><blockquote type=cite class=cite cite>So: is the system directional ?</font></blockquote><br><br> <b>The gain I mentioned was in efficiency. But there may be some gain by directivity of the aerial system as well, but this is not clear.<br><br> 73, Dick, PA0SE<br><br> <br> </b><blockquote type=cite class=cite cite><font size=3>Bryan - G3GVB (Near Brighton )<br><br> <br> -----Original Message-----<br> From: Dick Rollema <d.w.rollema@freeler.nl><br> To: rsgb_lf_group@blacksheep.org <rsgb_lf_group@blacksheep.org><br> Date: 06 July 2003 13:32<br> Subject: Re: LF: SAQ nil<br><br> <br> >To All from PA0SE<br> ><br> ><br> >>valerio gabbani wrote:<br> >>><br> >>>Alberto,<br> >>>Thanks for the info, did you know also the antenna system used ?<br> >>>'73, Valerio IK5ZPV<br> >You can find info (in Swedish) on the Grimeton station SAQ, including a<br> >photograph of the antenna system, at the following URL:<br> ><br> ><a href="http://www.alexander.n.se/" eudora="autourl">www.alexander.n.se</a><br> ><br> >The antenna consists of six 127m high vertical top fed radiators in line,<br> >each with its own earth tuning coil and earth electrode. This decreases the<br> >earth loss because each earth electrode carries a current I/N, in which I<br> >is the total earth current and N the number of radiators = number of earth<br> >electrodes. The gain results from the fact that the total earth loss is N<br> >times the loss around each electrode but the loss at each electrode<br> >decreases at (I/N) squared. The system was invented by Alexanderson, also<br> >designer of the alternator used at Grimeton.<br> ><br> >73, Dick, PA0SE</font></blockquote></html>