Return-Path: Received: from mtain-dg01.r1000.mx.aol.com (mtain-dg01.r1000.mx.aol.com [172.29.65.9]) by air-mb02.mail.aol.com (v129.4) with ESMTP id MAILINMB021-a18f4bd86beb287; Wed, 28 Apr 2010 13:10:03 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dg01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 91495380000D2; Wed, 28 Apr 2010 13:10:01 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1O7Akd-0001Wq-1T for rs_out_1@blacksheep.org; Wed, 28 Apr 2010 18:08:43 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1O7Akc-0001Wh-Lr for rsgb_lf_group@blacksheep.org; Wed, 28 Apr 2010 18:08:42 +0100 Received: from mailout-us.gmx.com ([74.208.5.67]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1O7AkZ-0007FY-Ph for rsgb_lf_group@blacksheep.org; Wed, 28 Apr 2010 18:08:42 +0100 Received: (qmail invoked by alias); 28 Apr 2010 17:08:32 -0000 Received: from 75-168-150-7.mpls.qwest.net (EHLO [192.168.1.100]) [75.168.150.7] by mail.gmx.com (mp-us002) with SMTP; 28 Apr 2010 13:08:32 -0400 X-Authenticated: #60769621 X-Provags-ID: V01U2FsdGVkX19V07VUr/RVu9+a1Y8bUq4YphtV9LmCUgUR4yPRWj KYxSEb9v2bxPag Message-ID: <4BD86B78.8000602@gmx.com> Date: Wed, 28 Apr 2010 12:08:08 -0500 From: "Mike.WE0H" User-Agent: Thunderbird 2.0.0.24 (X11/20100317) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <003201cae3db$b7ffad50$0301a8c0@your91hoehfy9g>, <006e01cae6e3$2d46f4b0$4001a8c0@lark>, <4BD85BAD.18368.2436C56@dave.davesergeant.com> In-Reply-To: <4BD85BAD.18368.2436C56@dave.davesergeant.com> X-Y-GMX-Trusted: 0 X-FuHaFi: 0.67000000000000004 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Re: W1VLF 8.97 KHz UPDATE Trees, Questions, Ground Content-Type: text/plain; charset=ISO-8859-1; format=flowed 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=0.0 required=5.0 tests=none 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-global-disposition: G x-aol-sid: 3039ac1d41094bd86be94229 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) Most people thought a TX loop would not radiate out of a backyard. That was proven very wrong many years ago. The calculations say a TX loop is a terrible antenna, but it does radiate very well. Might it work on the 9kc band? Maybe. Dex W4DEX used a TX loop for his VLF experiment many years ago on 7 or 8kc with very low power. He covered 10km I believe. One never will know until someone builds a proper 9kc TX loop and tests it. Might be a big surprise, might not. We know it will absolutely require a low loss conductor, low loss series resonating caps, and the proper matching transformer. Mike WE0H