Return-Path: X-Spam-DCC: paranoid 1170; 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=-1.0 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,SUBJ_RE_NUM 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 tA2DqOcW020550 for ; Mon, 2 Nov 2015 14:52:24 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1ZtFUW-0006pT-9y for rs_out_1@blacksheep.org; Mon, 02 Nov 2015 13:49:44 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1ZtFUW-0006pK-1c for rsgb_lf_group@blacksheep.org; Mon, 02 Nov 2015 13:49:44 +0000 Received: from smarthost01b.mail.zen.net.uk ([212.23.1.3]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1ZtFTM-0001G9-TE for rsgb_lf_group@blacksheep.org; Mon, 02 Nov 2015 13:49:42 +0000 Received: from [82.70.254.222] (helo=OfficeWin7.lan) by smarthost01b.mail.zen.net.uk with esmtp (Exim 4.80) (envelope-from ) id 1ZtFTC-0001gP-3O for rsgb_lf_group@blacksheep.org; Mon, 02 Nov 2015 13:48:22 +0000 Date: Mon, 2 Nov 2015 13:48:21 +0000 From: Chris Wilson Organization: Gatesgarth Developments X-Priority: 3 (Normal) Message-ID: <935052038.20151102134821@chriswilson.tv> To: Mike Dennison In-Reply-To: <56375E6E.24975.AD8B5E@mike.dennison.ntlworld.com> References: <1887849276.20151030143118@chriswilson.tv>, <5633D56C.20659.23BE4D8@mike.dennison.ntlworld.com>, <316685691.20151031121552@chriswilson.tv> <56375E6E.24975.AD8B5E@mike.dennison.ntlworld.com> MIME-Version: 1.0 X-Originating-smarthost01b-IP: [82.70.254.222] X-Scan-Signature: fc152e7304849b9a177649b85aea9f41 Subject: Re[4]: LF: Zmag of 45.6 Ohms OK, or should I try for better? Content-Type: text/plain; charset=us-ascii 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: 4786 Hello Mike, Monday, November 2, 2015 I have this variometer, (although it was sold to me as a goniometer, for a fiver, and is unused). http://www.chriswilson.tv/goniometer.zip It measures, at 136kHz, between 16.3 uH to 97.8 uH, series connected, quite a bit less parallel connected. Could I use it, it would be easy to motor drive the fine tune shaft with the gear and quadrant on it? > Chris, my 3C90 transformer has about 16 turns on each winding. (I say > approximately as I need to adjust by a turn or two between summer and > winter due to absorption/detuning by trees. I would suggest using the > thickest wire you have in case you want to run higher power in the > furture. > As for the variometer, mine covers about 200-500mH and this will tune > about twice the width of the 136kHz band (in conjunction with my big > coil). Coincidentally it also tunes the 472kHz band when the big coil > is removed. > Mike, G3XDV > ========== -- Best regards, Chris mailto:chris@chriswilson.tv