Return-Path: Received: from rly-dc06.mx.aol.com (rly-dc06.mail.aol.com [172.19.136.35]) by air-dc01.mail.aol.com (v126.13) with ESMTP id MAILINDC013-b294b2cd71b1f2; Sat, 19 Dec 2009 08:37:35 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dc06.mx.aol.com (v125.7) with ESMTP id MAILRELAYINDC065-b294b2cd71b1f2; Sat, 19 Dec 2009 08:37:33 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NLzPs-0001et-Cu for rs_out_1@blacksheep.org; Sat, 19 Dec 2009 13:32:16 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NLzPs-0001ek-2D for rsgb_lf_group@blacksheep.org; Sat, 19 Dec 2009 13:32:16 +0000 Received: from qmta10.westchester.pa.mail.comcast.net ([76.96.62.17]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NLzT7-0002NS-OV for rsgb_lf_group@blacksheep.org; Sat, 19 Dec 2009 13:35:39 +0000 Received: from OMTA11.westchester.pa.mail.comcast.net ([76.96.62.36]) by QMTA10.westchester.pa.mail.comcast.net with comcast id K14A1d0010mv7h05A1cB90; Sat, 19 Dec 2009 13:36:11 +0000 Received: from JAYDELL ([76.23.233.102]) by OMTA11.westchester.pa.mail.comcast.net with comcast id K1cB1d0012DDHkk3X1cBpA; Sat, 19 Dec 2009 13:36:11 +0000 Message-ID: <001e01ca80b0$392cb0b0$8d01a8c0@JAYDELL> From: To: References: <38A51B74B884D74083D7950AD0DD85E828ACB3@File-Server-HST.hst.e-technik.tu-darmstadt.de> <346854e9698cbf94f4483c66682bb63b.squirrel@webmail.xs4all.nl> Date: Sat, 19 Dec 2009 08:36:08 -0500 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 X-Karma: unknown: X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=disabled,NO_REAL_NAME=0.55 Subject: LF: Re: Noise cancelling by using optic transmission of RX signals Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME 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 >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