Return-Path: X-Spam-DCC: paranoid 1002; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, RATWARE_GECKO_BUILD 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 t9TLDvtr007117 for ; Thu, 29 Oct 2015 22:13:57 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZruTb-00042O-2V for rs_out_1@blacksheep.org; Thu, 29 Oct 2015 21:11:15 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZruTa-00042F-QL for rsgb_lf_group@blacksheep.org; Thu, 29 Oct 2015 21:11:14 +0000 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.86) (envelope-from ) id 1ZruSW-00042L-Lj for rsgb_lf_group@blacksheep.org; Thu, 29 Oct 2015 21:11:13 +0000 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id 6F28120A30 for ; Thu, 29 Oct 2015 22:09:52 +0100 (CET) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3nmztS2DZ1z5vN9 for ; Thu, 29 Oct 2015 22:09:52 +0100 (CET) Message-ID: <56328B1F.2080901@posteo.de> Date: Thu, 29 Oct 2015 22:09:51 +0100 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <1981852865.20151017122027@chriswilson.tv> <1530BFEB-9BC2-4CA2-A7A3-338629A98202@me.com> <308511169.20151029202607@chriswilson.tv> In-Reply-To: <308511169.20151029202607@chriswilson.tv> X-Scan-Signature: bb61bee384896e075004ae5ec954ddd2 Subject: Re: LF: Automatic variometer circuit 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 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 4677 Hi Chris, Am 29.10.2015 21:26, schrieb Chris Wilson: > [...] albeit my loading coil needs manual > tweaking to move to the right part of the band. Not sure of the best > way to remote tune it, it would be nice to have the ability to move > about the band without running outside in the dark. I may start a > thread about what alternatives there are, thanks again Erwin > I'm using a motor driven variometer which uses the phase meter circuit of the M0BMU LF tuning meter. It is working well on LF, where my antenna resonance is so sharp that i have to re-tune when doing QSY by 7 Hz. See: https://dl.dropboxusercontent.com/u/19882028/LF/LFtunemeter.pdf https://dl.dropboxusercontent.com/u/19882028/LF/DK7FC%20Automatic_variometer_tuner%20.jpg https://dl.dropboxusercontent.com/u/19882028/LF/automatic_variometer_board.jpg https://dl.dropboxusercontent.com/u/19882028/LF/LF_variometer_drive_engine_arrangement.jpg https://dl.dropboxusercontent.com/u/19882028/LF/phase_meter.jpg 2011 was a nice LF year for me!! :-) 73, Stefan