Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-db01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 27E8E3800009F; Tue, 29 May 2012 13:16:03 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SZQ0F-0003Vc-JR for rs_out_1@blacksheep.org; Tue, 29 May 2012 18:14:39 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SZQ0E-0003VT-Ms for rsgb_lf_group@blacksheep.org; Tue, 29 May 2012 18:14:38 +0100 Received: from moutng.kundenserver.de ([212.227.17.8]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1SZQ0D-0002Gl-49 for rsgb_lf_group@blacksheep.org; Tue, 29 May 2012 18:14:37 +0100 Received: from [192.168.2.104] (p548D2607.dip.t-dialin.net [84.141.38.7]) by mrelayeu.kundenserver.de (node=mrbap2) with ESMTP (Nemesis) id 0M03PY-1RjwLP2V1Y-00uYlj; Tue, 29 May 2012 19:14:27 +0200 Message-ID: <4FC503F3.4040507@legal-medicine.de> Date: Tue, 29 May 2012 19:14:27 +0200 From: pws User-Agent: Mozilla/5.0 (X11; U; Linux i686; de; rv:1.9.2.24) Gecko/20111101 SUSE/3.1.16 Thunderbird/3.1.16 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4FC39CF3.7020701@legal-medicine.de> In-Reply-To: X-Provags-ID: V02:K0:VIw0cq1zNkvvdV4EgJ1vStm8r4ADU+9Sex5PpmyNWQ/ JHpBji5tManaUr5n+Tl5oHm/qSInqTzOuB/A2JTGVxXU0R/zkr GLKtbH3SmDRJcOZgLVw25awWrSk4wN/ECOYPgnn8NA+qSCG/qP 4tjiYu2Xn7rMSL7x4ecV7S92WHPDbqu5jm1qJ2KG5q6P9rwoAs G4WixO98o2ufgavi1QLAd1/1cB6pQ14J+uSKjYB9bypdbgep6o rkxzEDBYTw5/5qdJXbKWmeDSFsTDl/lC7DZGBrLINe+hlDHdcd O9JIutxAqNRkGw7CRt/HPRU/P7zvT0vRX1y4v/4pFqZlIE9vng s7QhzJSCiWPZWpWPZ3LE= 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: Hi Mauro, Sorry about the delay. Some workload. You wrote: > ... > unfortunately I do not know the ansver to your question, but I am VERY > interested on this kind of antennas for my 137 and 500KHz rx .. > please, how big are the "probes" ??? > > Is this antenna also usable for 8KHZ dream bands, or for SAQ Grimeton > reception ?? > ... [...] 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 [212.227.17.8 listed in list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record X-Scan-Signature: 2e2f7cbbe9f38dd7bf3fac4fc012e6fc Subject: Re: LF: VLF/LF-Preamp Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit 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-SCOLL-SCORE: 0:2:377137344:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d40554fc50452779f X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : temperror Hi Mauro, Sorry about the delay. Some workload. You wrote: > ... > unfortunately I do not know the ansver to your question, but I am VERY > interested on this kind of antennas for my 137 and 500KHz rx .. > please, how big are the "probes" ??? > > Is this antenna also usable for 8KHZ dream bands, or for SAQ Grimeton > reception ?? > ... The two "probes" are only 30 cm of length, using 4 mm of insulated wires. For 137 kHz it should work, but at 500 kHz the common mode ratio will be less sufficient - according to the datasheet of the INA111. These input filters are nearly optimal from 10 up to >100 kHz. For 8 kHz I would suggest increasing the series capacitors from 22 pF up to ~50 pF. I made screen shots. Will upload them next. Peter, df3lp