Return-Path: Received: from mtain-mh12.r1000.mx.aol.com (mtain-mh12.r1000.mx.aol.com [172.29.96.224]) by air-mb08.mail.aol.com (v126.13) with ESMTP id MAILINMB084-a8064b5f81b01bd; Tue, 26 Jan 2010 18:58:40 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mh12.r1000.mx.aol.com (Internet Inbound) with ESMTP id C147A38000159; Tue, 26 Jan 2010 18:58:38 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NZvHW-0001Ia-V0 for rs_out_1@blacksheep.org; Tue, 26 Jan 2010 23:57:14 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NZvHW-0001IR-FU for rsgb_lf_group@blacksheep.org; Tue, 26 Jan 2010 23:57:14 +0000 Received: from lnx503.hrz.tu-darmstadt.de ([130.83.156.232]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NZvHU-0004rp-8n for rsgb_lf_group@blacksheep.org; Tue, 26 Jan 2010 23:57:14 +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 lnx503.hrz.tu-darmstadt.de (8.14.2/8.14.2/HRZ/PMX) with SMTP id o0QNvBhF025481 for ; Wed, 27 Jan 2010 00:57:11 +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, 27 Jan 2010 00:57:10 +0100 Date: Wed, 27 Jan 2010 00:52:34 +0100 MIME-Version: 1.0 Message-ID: <38A51B74B884D74083D7950AD0DD85E82A1AAC@File-Server-HST.hst.e-technik.tu-darmstadt.de> X-MS-Has-Attach: Content-class: urn:content-classes:message X-MS-TNEF-Correlator: <38A51B74B884D74083D7950AD0DD85E82A1AAC@File-Server-HST.hst.e-technik.tu-darmstadt.de> X-MimeOLE: Produced By Microsoft Exchange V6.5 Thread-Topic: LF: low noise OPAs and Transistors Thread-Index: Acqei6WGS6vkCnfiTKu3sxDsFoDwiAAVvv3O References: <5A430FD7C1764930A931D68A9C674CB8@ns94d01ae4d850> <4B5C8852.8050604@mail.ru> <38A51B74B884D74083D7950AD0DD85E82A1AAA@File-Server-HST.hst.e-technik.tu-darmstadt.de> <38A51B74B884D74083D7950AD0DD85E82A1AAB@File-Server-HST.hst.e-technik.tu-darmstadt.de> <4B5EECA7.6060702@usa.net> From: =?iso-8859-1?Q?Stefan_Sch=E4fer?= To: X-AVK-Virus-Check: AVB 19.706;26.01.2010 X-PMX-TU: seen v0.99a by 5.5.8.383112, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2010.1.26.234223 X-PMX-SPAMCHECK: outgoing mail X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: AW: LF: low noise OPAs and Transistors Content-Type: multipart/mixed; boundary="----_=_NextPart_001_01CA9EE3.45A57C5B" 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: 5400.1158/54070 X-AOL-VSS-CODE: Scan Clean x-aol-sid: 3039ac1d60e04b5f81ae627e X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) ------_=_NextPart_001_01CA9EE3.45A57C5B Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Alberto,=20 =20 Tnx for reply. Let us know about your loop preamp if it is finished.=20 =20 I already have ordered 10 pcs of the BF862 for my active E Field active an= tenna! This FET is MUCH more sensitive than the BF245C and has 1/10 of the= noise of the J310... =20 73 es gl! =20 Stefan/DK7FC ________________________________ Von: owner-rsgb_lf_group@blacksheep.org im Auftrag von Alberto di Bene Gesendet: Di 26.01.2010 14:22 An: rsgb_lf_group@blacksheep.org Betreff: Re: LF: low noise OPAs and Transistors On 1/26/2010 2:24 AM, Stefan Sch=E4fer wrote: > Dear Group, > > I just study some interesting articles about low noise transistors and= OPAs for amplifier applications and found that article very interesting: > > http://www.janascard.cz/PDF/Ultra%20low%20noise%20amplifiers.pdf > > Perhaps it is interesting for some of you as well... > > 73, Stefan/DK7FC > Thanks Stefan, very interesting if one has to build a low noise loop preamplifier (as= I have...:-) 73 Alberto I2PHD ------_=_NextPart_001_01CA9EE3.45A57C5B Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: base64 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