X-GM-THRID: 1239813892831739116 X-Gmail-Labels: rsgb lf Delivered-To: daveyxm@gmail.com Received: by 10.78.172.10 with SMTP id u10cs425133hue; Wed, 20 Jun 2007 15:31:06 -0700 (PDT) Received: by 10.82.186.5 with SMTP id j5mr2431565buf.1182378666815; Wed, 20 Jun 2007 15:31:06 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id h6si3489179nfh.2007.06.20.15.31.01; Wed, 20 Jun 2007 15:31:06 -0700 (PDT) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1I18eo-0003z1-FC for rs_out_1@blacksheep.org; Wed, 20 Jun 2007 23:28:10 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1I18en-0003ys-QD for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2007 23:28:09 +0100 Received: from rwcrmhc15.comcast.net ([204.127.192.85]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1I18em-00034y-1a for rsgb_lf_group@blacksheep.org; Wed, 20 Jun 2007 23:28:09 +0100 Received: from rmailcenter17.comcast.net ([204.127.197.127]) by comcast.net (rwcrmhc15) with SMTP id <20070620222801m1500sr9n3e>; Wed, 20 Jun 2007 22:28:01 +0000 Received: from [24.91.125.179] by rmailcenter17.comcast.net; Wed, 20 Jun 2007 22:28:00 +0000 From: k2ors@comcast.net To: rsgb_lf_group@blacksheep.org (rsgb lf reflector), rsgb_lf_group@blacksheep.org (rsgb lf reflector) Date: Wed, 20 Jun 2007 22:28:00 +0000 Message-Id: <062020072228.467.4679A9F000059E24000001D322058891160B97010D0A020E06979D0E03@comcast.net> X-Mailer: AT&T Message Center Version 1 (Oct 4 2006) X-Authenticated-Sender: bWFyeWphbmVib3lkQGNvbWNhc3QubmV0 X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=disabled,NO_REAL_NAME=0.55 Subject: LF: LF Vertical Antennas problem... 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 Status: O X-Status: X-Keywords: X-UID: 2727 Hello the list, I have in the past used my 160 meter dipole as a vertical "T" by tying the feeders together and using a tapped loading coil to resonate and match the antenna. I could get a perfect 50 ohm match in this manner and it radiated quite well - Hartmut copied my transmission running around 100 watts. I have also used the same setup on 500kHz with a different loading coil successfully. Now I find that I cannot resonate the antenna - I can't eliminate the reactance no matter what the setting of the tap or the coil. The best I can do is an swr of 1.7:1 and at least 40 ohms of reactance. I have tried changing coils and still the problem persists. If I do transmit this way, my signal seems to be down at least 10dB below what it was when the antenna resonated properly. Any thoughts? -- 73 Warren K2ORS/WD2XGJ/WD2XSH/23/WE2XEB/2 FN42hi http://www.w4dex.com/wd2xgj.htm