Return-Path: X-Spam-DCC: paranoid 1170; 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=-0.7 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 u09BsmUt000584 for ; Sat, 9 Jan 2016 12:54:49 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aHs2e-0006nI-LE for rs_out_1@blacksheep.org; Sat, 09 Jan 2016 11:50:44 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aHs2e-0006n9-Cu for rsgb_lf_group@blacksheep.org; Sat, 09 Jan 2016 11:50:44 +0000 Received: from mail.webgo24-server11.de ([37.17.224.224]) by relay1.thorcom.net with esmtp (Exim 4.86) (envelope-from ) id 1aHs1Y-0000oC-O1 for rsgb_lf_group@blacksheep.org; Sat, 09 Jan 2016 11:50:43 +0000 Received: from [192.168.0.187] (xdsl-78-35-168-39.netcologne.de [78.35.168.39]) by mail.webgo24-server11.de (Postfix) with ESMTPSA id 3AF7C9A635E2 for ; Sat, 9 Jan 2016 12:49:21 +0100 (CET) Message-ID: <5690F3C1.9000604@vsas.de> Date: Sat, 09 Jan 2016 12:49:21 +0100 From: Vincent DL6II User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130328 Thunderbird/17.0.5 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <568A4048.4000001@vsas.de> <568A7620.7010506@gmx.de> <568ABD8B.7040402@vsas.de> <568AFBE7.2070409@gmx.de> In-Reply-To: <568AFBE7.2070409@gmx.de> X-Scan-Signature: a6b6ffaf48fdddf1ed5c25dc4bf03ee1 Subject: Re: LF: DL-SWL Content-Type: text/plain; charset=ISO-8859-15; 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: 6231 Hello Hartmut, I've build up the antenna like this one http://jpmere.online.fr/L_F/Les%20LF.htm yesterday. But the signal levels have been mutch lower then the levels of my T-antenna. I suppose the matching is not too good so far. Can you describe your transformer in detail please? What kind of ferrite and how many windings are you using for LF/MF? 73 de Vinny Am 05.01.2016 00:10, schrieb Hartmut Wolff: > Am 2016-01-04 um 19:44 schrieb Vincent Stallbaum: >> @Hartmut are you using the original dimensions like >> http://www.pa1a.com/PA1A/Antennas/k9ay/K9AY_Loop_re.jpg ? Or is your >> loop ab bit bigger? > > Vincent, > > my antenna is looking like this: > > http://jpmere.online.fr/L_F/Les%20LF.htm > > because it was designed for 74kHz and 137kHz. > > If you listening only on 630m adding a few meters wire to the original > design may be enough. Important is you are hearing external noise and > not the noise floor of the receiver. > The antenna is only working with length of wire up to lambda/4. Which > is important if you would like to use the antenna on 160m and 80m too. > A tuned transmitting antenna close to the loop may destroy the pattern > of the loop. > > 73 > Hartmut > >