Return-Path: Received: (qmail 4359 invoked from network); 19 Aug 2002 20:56:06 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 19 Aug 2002 20:56:06 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 5407 invoked from network); 19 Aug 2002 20:56:18 -0000 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 19 Aug 2002 20:56:18 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 17gv6U-0001rD-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 19 Aug 2002 23:34:30 +0100 Received: from mail-8.tiscali.it ([195.130.225.154] helo=mail.tiscali.it) by post.thorcom.com with esmtp (Exim 3.33 #2) id 17gv6R-0001qy-00 for rsgb_lf_group@blacksheep.org; Mon, 19 Aug 2002 23:34:27 +0100 Received: from localhost.localdomain (62.10.65.235) by mail.tiscali.it (6.5.026) id 3D521521002EA1E1 for rsgb_lf_group@blacksheep.org; Mon, 19 Aug 2002 22:41:34 +0200 Received: from localhost (localhost [[UNIX: localhost]]) by localhost.localdomain (8.11.6/8.11.6) id g7HLJsC01083 for rsgb_lf_group@blacksheep.org; Sat, 17 Aug 2002 23:19:55 +0200 Content-Type: text/plain; charset=us-ascii; format=flowed From: "Claudio" To: "RSGB LF group" Subject: LF: TECH: modem transformers works well on LF Date: Sat, 17 Aug 2002 23:19:54 +0200 User-Agent: KMail/1.4.1 MIME-Version: 1.0 Message-ID: <200208172319.54170.clapo@localhost.localdomain> Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by localhost.localdomain id g7HLJsC01083 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: I have tested some 600 ohm modem transformers, they works well also for LF. The insertion loss at 300 kHz is between 1 and 3 dB. Inside PCMCIA cards modem for lap top you can find very small transformers. They should be sure up to few hundreds volts between primary and secondary. 73 de Claudio, ik2pii -- ====================================================== Claudio Pozzi - Happy Linux user - http://www.qsl.net/ik2pii ======================================================