Return-Path: Received: (qmail 75924 invoked from network); 23 Nov 2004 09:59:12 -0000 Received: from unknown (HELO ptb-spamcore02.plus.net) (192.168.71.3) by ptb-mailstore02.plus.net with SMTP; 23 Nov 2004 09:59:12 -0000 Received: from mailnull by ptb-spamcore02.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1CWXS8-000I0o-OU for dave@picks.force9.co.uk; Tue, 23 Nov 2004 09:59:20 +0000 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore02.plus.net with esmtp (Exim 4.32; FreeBSD) id 1CWXS8-000I0c-Gn for dave@picks.force9.co.uk; Tue, 23 Nov 2004 09:59:16 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1CWXRz-00074a-IP for dave@picks.force9.co.uk; Tue, 23 Nov 2004 09:59:07 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1CWXQt-0007cP-Ag for rs_out_1@blacksheep.org; Tue, 23 Nov 2004 09:57:59 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1CWXQs-0007cG-8Y for rsgb_lf_group@blacksheep.org; Tue, 23 Nov 2004 09:57:58 +0000 Received: from msgdirector4.onetel.net.uk ([212.67.96.160] ident=mirapoint) by relay.thorcom.net with esmtp (Exim 4.41) id 1CWXQm-0007Wt-Rl for rsgb_lf_group@blacksheep.org; Tue, 23 Nov 2004 09:57:58 +0000 Received: from mail05.onetel.net.uk (mail05.onetel.net.uk [212.67.96.157]) by msgdirector4.onetel.net.uk (MOS 3.4.6-GR) with ESMTP id CMA95653; Tue, 23 Nov 2004 09:57:50 GMT Received: from mail05.onetel.net.uk (localhost.onetel.net.uk [127.0.0.1]) by mail05.onetel.net.uk (MOS 3.4.6-GR) with ESMTP id CDA58967; Tue, 23 Nov 2004 09:57:49 GMT Received: from 213.78.182.231 by mail05.onetel.net.uk (MOS 3.4.6-GR) with HTTP/1.1; Tue, 23 Nov 2004 09:57:49 GMT Date: Tue, 23 Nov 2004 09:57:49 GMT From: Brian Hodgson To: rsgb_lf_group@blacksheep.org X-Mailer: Webmail Mirapoint Direct 3.4.6-GR MIME-Version: 1.0 Message-Id: X-SPF-Result: relay.thorcom.net: 212.67.96.160 is neither permitted nor denied by domain of onetel.com X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: Re: LF: Sunday activity report Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com 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-Spam-Filtered: by PlusNet SpamCORE (v3.00) WE0H writes: Can you describe his loop and loop tuner box? Hi All - Now that I've sorted out my access to the Reflector I'll try to describe what I'm using. The loop is relatively small !! It's 9.5m wide by 3.5m high and 1.5m off the ground. Its made from satellite downlead coax (braid and foil type) and has a dc resistance of about 0.3 ohms. Initial measurements (using a step down toroid transformer) indicated an rf impedance of less than one ohm. Taking a close look at the map shows that the loop horizontals are lined up 25 degrees off north so I guess the nulls are on bearings of 115 & 295. QTH is Watford. Transmissions on Sunday used the transformer and a series 34 nF which gave 10 amps loop current. I've since changed the transformer for an L-match (8 micro Henries and 27 nF) to match the 50 ohm feeder to the one ohm load. I now have 13 amps from the 90 watts coming out of the feeder. BTW - the 90 watts is from a LINEAR amplifier so can run PSK31. So far, only LF PSK contacts have been with Jim (M0BMU) and John (G0NVZ). Is anyone else able to run 136 kHz PSK ? Brian