Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v3JF9nXP017256 for ; Wed, 19 Apr 2017 17:09:51 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1d0rBS-0003n6-Ba for rs_out_1@blacksheep.org; Wed, 19 Apr 2017 16:06:18 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1d0rBR-0003mx-RD for rsgb_lf_group@blacksheep.org; Wed, 19 Apr 2017 16:06:17 +0100 Received: from mailfe01.swip.net ([212.247.154.1] helo=swip.net) by relay1.thorcom.net with esmtp (Exim 4.89) (envelope-from ) id 1d0rBO-0002t1-OQ for rsgb_lf_group@blacksheep.org; Wed, 19 Apr 2017 16:06:16 +0100 X-T2-Spam-Status: No, hits=0.8 required=5.0 tests=BAYES_50 Received: from [81.224.109.193] (account cxu-dcw-tyr@tele2.se HELO [192.168.1.2]) by mailfe01.swip.net (CommuniGate Pro SMTP 5.4.4) with ESMTPSA id 683005419 for rsgb_lf_group@blacksheep.org; Wed, 19 Apr 2017 17:06:12 +0200 To: rsgb_lf_group@blacksheep.org References: <15b85cdbd35-6915-29879@webprd-a46.mail.aol.com> <58F75AFF.9000100@posteo.de> <58F7795E.3000606@posteo.de> From: Johan Bodin Message-ID: Date: Wed, 19 Apr 2017 17:06:14 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <58F7795E.3000606@posteo.de> X-Scan-Signature: cc2e5baae40f8f7a09b47e6877ef0bfb Subject: Re: LF: A transductor for power regulation? Content-Type: text/plain; charset=utf-8; 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 2.75 Status: O X-Status: X-Keywords: X-UID: 11400 I measured SAQ's backwave as 17dB below key-down power, "only" 4kW leaks out when the key is up. You are on the right track. Just need another 12.5dB to reach SAQ performance! ;-) 73 Johan DK7FC wrote: > Also the power difference between saturated and unsaturated > transformer is just 4.5 dB when 5A DC is applied to 2x 20 turns. It > will also help to use more DC turns, more equally spaced. Will try > that later...