Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 616BD38000082; Sun, 13 May 2012 16:39:21 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1STfXv-0001f1-MT for rs_out_1@blacksheep.org; Sun, 13 May 2012 21:37:39 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1STfXv-0001es-1m for rsgb_lf_group@blacksheep.org; Sun, 13 May 2012 21:37:39 +0100 Received: from mailout-de.gmx.net ([213.165.64.23]) by relay1.thorcom.net with smtp (Exim 4.77) (envelope-from ) id 1STfXt-0008TI-59 for rsgb_lf_group@blacksheep.org; Sun, 13 May 2012 21:37:37 +0100 Received: (qmail invoked by alias); 13 May 2012 20:37:34 -0000 Received: from p4FF2DFEA.dip.t-dialin.net (EHLO [192.168.2.11]) [79.242.223.234] by mail.gmx.net (mp029) with SMTP; 13 May 2012 22:37:34 +0200 X-Authenticated: #38158605 X-Provags-ID: V01U2FsdGVkX18ZG15DResZx2kD/hVjaNy4kOYg2RvMnDvt70fZnZ dX4jAbhTcUv6Cp Message-ID: <4FB01B8C.8050004@gmx.de> Date: Sun, 13 May 2012 22:37:32 +0200 From: Hartmut Wolff User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4FAFEA71.8030700@iup.uni-heidelberg.de> In-Reply-To: <4FAFEA71.8030700@iup.uni-heidelberg.de> X-Y-GMX-Trusted: 0 X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Am 2012-05-13 19:08, schrieb Stefan Schäfer: > Any ideas, experiance or advice? Stefan, your model shows a lot of thermal noise and the gain is very low. Outer Ring below 70dBi is not useable. Attached is a Eznec file with a cardiod antenna I used with good results. The additional preamp had about 20dB gain. [...] 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 [213.165.64.23 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (h-wolff[at]gmx.de) -0.0 SPF_PASS SPF: sender matches SPF record X-Scan-Signature: c0e6e8bcdc231effb9da2003d606d9a2 Subject: Re: LF: Cardioid RX antenna for LF... Content-Type: multipart/mixed; boundary="------------040106050406070208010003" 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 x-aol-global-disposition: G X-AOL-VSS-INFO: 5400.1158/80696 X-AOL-VSS-CODE: clean X-AOL-SCOLL-SCORE: 0:2:427034528:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1dc1484fb01bf879a8 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------040106050406070208010003 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 8bit Am 2012-05-13 19:08, schrieb Stefan Schäfer: > Any ideas, experiance or advice? Stefan, your model shows a lot of thermal noise and the gain is very low. Outer Ring below 70dBi is not useable. Attached is a Eznec file with a cardiod antenna I used with good results. The additional preamp had about 20dB gain. The here mentioned antennas from Dallas Lankford are mostly Flag arrays which are working great down to 0,5MHz! 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