Return-Path: X-Spam-DCC: paranoid 104; Body=3 Fuz1=3 Fuz2=3 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u22D7i7h014810 for ; Wed, 2 Mar 2016 14:07:44 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ab6QI-00083l-L5 for rs_out_1@blacksheep.org; Wed, 02 Mar 2016 13:02:38 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ab6QI-00083c-Cz for rsgb_lf_group@blacksheep.org; Wed, 02 Mar 2016 13:02:38 +0000 Received: from brian.netcom.co.uk ([217.72.171.64]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1ab6QG-0004aI-Lg for rsgb_lf_group@blacksheep.org; Wed, 02 Mar 2016 13:02:37 +0000 Received: from sb.abelian.org (i-194-106-52-83.freedom2surf.net [194.106.52.83]) by brian.netcom.co.uk (Postfix) with ESMTP id 0AF863200DD for ; Wed, 2 Mar 2016 12:40:00 +0000 (GMT) Received: from [127.0.0.1] (localhost [127.0.0.1]) by sb.abelian.org (Postfix) with ESMTP id 47EE828A0227 for ; Wed, 2 Mar 2016 13:02:34 +0000 (UTC) Message-ID: <56D6E46A.1020002@abelian.org> Date: Wed, 02 Mar 2016 13:02:34 +0000 From: Paul Nicholson User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <8D3420CFDD5DAA0-600-6AE9F0@webmail-vm167.sysops.aol.com> <56D6D21E.9060008@abelian.org> In-Reply-To: X-Scan-Signature: 4e3b1488273adbbe9757d6bdd5adf219 Subject: Re: LF: MF: EbNaut Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 7171 Congratulations Joe and Markus! A new record, I make that 4555 km and with a dB or two to spare. That's really is a milestone for coherent at MF. I wonder if the propagation would stand longer symbols at that distance. Perhaps try 2 seconds? > 00:30 2.2 0.8 0 Only losing 1.4 dB at most. Maybe things get better at very long range. The next target would be 5418 km to Domenico. Andy wrote: > Consider using a Tee input low-pass filter, I was using a Pi. The next build will use a T if I'm not using an antenna loading coil. > A shunt C input will give large current spikes when hit > with the square wave from a voltage mode Class-D PA That explains then, why the spike went away when I reconfigured for current mode. Now it is all beginning to add up. My next attempt at a PA hopefully wont have so many elementary mistakes. -- Paul Nicholson --