Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w5SJ1vk1013846 for ; Thu, 28 Jun 2018 21:02:00 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1fYc5J-0000gy-9Q for rs_out_1@blacksheep.org; Thu, 28 Jun 2018 19:56:01 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1fYc5H-0000gp-FL for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2018 19:55:59 +0100 Received: from smtp-out-5.talktalk.net ([62.24.135.69]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1fYc5E-0001OP-TZ for rsgb_lf_group@blacksheep.org; Thu, 28 Jun 2018 19:55:58 +0100 Received: from [192.168.1.10] ([2.98.120.233]) by smtp.talktalk.net with SMTP id Yc5DfHMNydJAeYc5Dfztqd; Thu, 28 Jun 2018 19:55:56 +0100 X-DKIM-Result: Domain=talktalk.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=talktalk.net; s=cmr1711; t=1530212156; bh=wOoahr6pNkVEKrZIIU1rfe40jWXjluNOfuCF/tOfrAA=; h=Subject:References:From:In-Reply-To:Date:To; b=VE1d6x+8P4DFZylpOUsZpmnIVYh2LT1qEmCL4gOkVax3hPTbyFaUuzIjBRZuOPxY6 MoC0FTuIVghFqP8TaB2YnFiPPADP+20ycYFEI/Aj1p5C/CYiBh2Zzqm6pGsLQ3kyXO YzePE3w9i9NQwjZashjyQUmv13ObLvZFaxqWdHz0= X-Originating-IP: [2.98.120.233] X-Spam: 0 X-OAuthority: v=2.3 cv=V8BTL9vi c=1 sm=1 tr=0 a=D6bIHr++jcLTNa5lydkfVQ==:117 a=D6bIHr++jcLTNa5lydkfVQ==:17 a=kj9zAlcOel0A:10 a=21nZxyA9F7JaX6SO17AA:9 a=CjuIK1q_8ugA:10 References: <319563372.20180628161811@gmail.com> <5B3512D8.7080006@posteo.de> From: Mal Hamilton X-Mailer: iPhone Mail (14G60) In-Reply-To: <5B3512D8.7080006@posteo.de> Message-Id: Date: Thu, 28 Jun 2018 19:55:55 +0100 To: rsgb_lf_group@blacksheep.org Mime-Version: 1.0 (1.0) X-CMAE-Envelope: MS4wfENQ6Ls3YaGQWMRQIbH8dnvIy1JuLuwuR27ur3ZShPGxJIGr9Hei1yRLBgULTpHN5W2G+TwSQ/MkIcl4GpYTrHvUEWVNfMlpb4L06bo7iWINjMjI6SLH Bs3QZkkiJmFfIlvYYSV6OEa4Z/6PMGk2HtkPNT/5Df2pRVRyO5BsDUFdlnpFXk99JygwRGFO+a3V3g== X-Spam-Score: -0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: I use aircore loading and matching Use 2 coils and SW between them for desired band G3KEV On 28 Jun 2018, at 17:54, DK7FC wrote: Hi Chris, [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [62.24.135.69 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 739d4fb39bd02fc5a2de5437a39bb056 Subject: Re: LF: Can I match 2 frequencies with one loading coil? Content-Type: text/plain; charset=us-ascii 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 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by klubnl.pl id w5SJ1vk1013846 I use aircore loading and matching Use 2 coils and SW between them for desired band G3KEV On 28 Jun 2018, at 17:54, DK7FC wrote: Hi Chris, It will depend on your antenna size and the system Q. Just try and see what happens. On RX, mnothing should become damaged. With the coil switched to LF there could be enough signal on MF. As long as e.g. a ferrite transformer in the line is can handle LF, it will also handle MF. Just about a factor 3 in frequency. But you could use further components in the shack to get more signal on MF then, like a parallel L which pulls the residual resonance towards higher frequencies. Just some spontaneous thoughts. 73, Stefan Am 28.06.2018 17:18, schrieb Chris Wilson: > > Hello LF'ers and MF'ers > > Can I, for RX only, use my single loading coil to match 2 receivers to > my single (LF at the moment) antenna , one on MF and one on LF? I > envisage 2 feedlines to the shack. How important is a 50 Ohm match on > the MF one? If I need a second matching transformer for MF what > toroidal core should I use? Thanks. 2E0ILY > > > >