Return-Path: Received: from rly-df03.mx.aol.com (rly-df03.mail.aol.com [172.19.156.16]) by air-df01.mail.aol.com (v123.4) with ESMTP id MAILINDF012-5384a170b71383; Fri, 22 May 2009 16:31:03 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-df03.mx.aol.com (v123.4) with ESMTP id MAILRELAYINDF031-5384a170b71383; Fri, 22 May 2009 16:30:43 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1M7bNU-0001RW-Is for rs_out_1@blacksheep.org; Fri, 22 May 2009 21:30:04 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1M7bNU-0001RN-6Y for rsgb_lf_group@blacksheep.org; Fri, 22 May 2009 21:30:04 +0100 Received: from c2bthomr01.btconnect.com ([213.123.20.119]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1M7bNM-0000tZ-SX for rsgb_lf_group@blacksheep.org; Fri, 22 May 2009 21:30:04 +0100 Received: from [192.168.1.64] (host86-142-69-246.range86-142.btcentralplus.com [86.142.69.246]) by c2bthomr01.btconnect.com with ESMTP id LHV72039; Fri, 22 May 2009 21:29:51 +0100 (BST) Message-ID: <4A170B41.4090800@btconnect.com> Date: Fri, 22 May 2009 21:29:53 +0100 From: Richard Newstead User-Agent: Thunderbird 2.0.0.21 (Windows/20090302) MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org X-Junkmail-Status: score=10/50, host=c2bthomr01.btconnect.com X-Junkmail-SD-Raw: score=unknown, refid=str=0001.0A0B0201.4A170B3F.00FD,ss=1,fgs=0, ip=192.168.1.64, so=2007-10-30 19:00:17, dmn=5.7.1/2008-09-02 X-Junkmail-IWF: false X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: 500kHz update 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-IP: 193.82.116.20 X-Mailer: Unknown (No Version) Dear all I have been making some progress towards 500kHz portable. Tonight I made a 500kHz preamp which has a very lightly coupled preselector. It was quite a challenge getting this resonant with a 50pF trimmer and padding capacitors (and no proper test gear). However, it now works and the S meter is reading for the first time ever on 500kHz. If I can get it all boxed up and it is dry I may have a first foray out portable tomorrow with an inverted L. I have order 200m of 3mm bungee cord and 200m of 3.2 mm nylon braid in preparation for kite ops. That will have to wait until another day. I will post here before I go. 73 Richard G3CWI