Return-Path: Received: from mtain-dg05.r1000.mx.aol.com (mtain-dg05.r1000.mx.aol.com [172.29.65.13]) by air-mc04.mail.aol.com (v127_r1.1) with ESMTP id MAILINMC041-a92e4baa82602c3; Wed, 24 Mar 2010 17:21:36 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dg05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 9BB2238000094; Wed, 24 Mar 2010 17:21:34 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NuY0D-0006qR-Ni for rs_out_1@blacksheep.org; Wed, 24 Mar 2010 21:20:37 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NuY0D-0006qI-B9 for rsgb_lf_group@blacksheep.org; Wed, 24 Mar 2010 21:20:37 +0000 Received: from lnx500.hrz.tu-darmstadt.de ([130.83.156.225]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NuY0B-0001IP-L9 for rsgb_lf_group@blacksheep.org; Wed, 24 Mar 2010 21:20:37 +0000 Received: from FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de (File-Server-HST.hst.e-technik.tu-darmstadt.de [130.83.212.129]) by lnx500.hrz.tu-darmstadt.de (8.14.2/8.14.2/HRZ/PMX) with SMTP id o2OLKWUN014578 for ; Wed, 24 Mar 2010 22:20:33 +0100 (envelope-from schaefer@hst.tu-darmstadt.de) Received: from [127.0.0.1] (helo=File-Server-HST.hst.e-technik.tu-darmstadt.de) by FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de with AVK MailGateway; for ; Wed, 24 Mar 2010 22:20:33 +0100 Content-class: urn:content-classes:message MIME-Version: 1.0 X-MimeOLE: Produced By Microsoft Exchange V6.5 Date: Wed, 24 Mar 2010 22:19:20 +0100 Message-ID: <38A51B74B884D74083D7950AD0DD85E82A1B91@File-Server-HST.hst.e-technik.tu-darmstadt.de> X-MS-Has-Attach: X-MS-TNEF-Correlator: <38A51B74B884D74083D7950AD0DD85E82A1B91@File-Server-HST.hst.e-technik.tu-darmstadt.de> Thread-Topic: LF: Re: Mini-Whip Thread-Index: AcrLl2JUWxCA4thGRAm/n0ttrRaSwgAAEilL References: <2a2c8.24f60f40.38d54e4e@aol.com> <38A51B74B884D74083D7950AD0DD85E82A1B81@File-Server-HST.hst.e-technik.tu-darmstadt.de> <4BA5CFAA.2030007@freenet.de> <56800827A5644E1BB3F320CB51E2300E@Black> <26E279AD762E44FB937A8A7DF8F934BC@Black> <8C7F2923D86B4517B1C156BA499E96E4@Black> <29746320.1346347.1269244849281.JavaMail.fmail@mwmweb078> <4BA7361F.1030702@abelian.org> <4BA7A586.8080307@abelian.org> <38A51B74B884D74083D7950AD0DD85E82A1B87@File-Server-HST.hst.e-technik.tu-darmstadt.de> <0A742B5B9F6A4E84A802D1F98B670E79@JimPC> <20100323130953.2BEFC31E702@smtps01.kuleuven.be> From: =?iso-8859-1?Q?Stefan_Sch=E4fer?= To: X-AVK-Virus-Check: AVB 19.841;24.03.2010 X-PMX-TU: seen v0.99a by 5.5.9.388399, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2010.3.24.210624 X-PMX-SPAMCHECK: outgoing mail X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: multipart/mixed; boundary="----_=_NextPart_001_01CACB97.D6A03A25" Subject: AW: LF: Re: Mini-Whip 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: 5400.1158/56658 X-AOL-VSS-CODE: clean x-aol-sid: 3039ac1d410d4baa825e6aa9 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) ------_=_NextPart_001_01CACB97.D6A03A25 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Roelof,=20 =20 Have you checked what happens with the SNR if you increase the probe C, sa= y to 10pF? =20 73, Stefan ________________________________ Von: owner-rsgb_lf_group@blacksheep.org im Auftrag von Roelof Bakker Gesendet: Mi 24.03.2010 22:13 An: rsgb_lf_group@blacksheep.org Betreff: Re: LF: Re: Mini-Whip Dear James, Thank you for your comments. I did already as you suggested and increased= =20 the bias resistor to 10 M. The coupling/decoupling capacitors were increased to 1 uF and the RFC's to= =20 8.2 mH. This gave an increase in signal level of around 20 dB. However the SNR was the same, so nothing was gained in the end. This modification might be useful for an insensitive receiver, though. The probe capacitance is approximately 3 pF. 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