Return-Path: Received: (qmail 29990 invoked from network); 27 Nov 2003 15:04:17 -0000 Received: from unknown (HELO netmail02.services.quay.plus.net) (212.159.14.221) by mailstore with SMTP; 27 Nov 2003 15:04:17 -0000 Received: (qmail 21792 invoked by uid 10001); 27 Nov 2003 15:04:15 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from post.thorcom.com (193.82.116.20) by netmail02.services.quay.plus.net with SMTP; 27 Nov 2003 15:03:10 -0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1APNeR-0001Yi-Fl for rsgb_lf_group-outgoing@blacksheep.org; Thu, 27 Nov 2003 15:01:51 +0000 Received: from [147.197.200.9] (helo=hestia.herts.ac.uk) by post.thorcom.com with esmtp (Exim 4.14) id 1APNeL-0001YZ-Cz for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 15:01:50 +0000 X-Fake-Domain: gemini Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1APNdw-0005NI-00 for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 15:01:20 +0000 X-No-DNS-For: 147.197.232.252 Received: from [147.197.232.252] (helo=rsch15) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 1APNdu-0005a4-00 for rsgb_lf_group@blacksheep.org; Thu, 27 Nov 2003 15:01:18 +0000 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Thu, 27 Nov 2003 15:01:14 -0000 Organization: University of Hertfordshire X-Bad-Message-ID: no DNS (rsch15) Message-ID: <000001c3b4f7$5047f240$fce8c593@rsch15> MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-reply-to: <3FC5977400001852@mail-4.tiscali.it> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-UH-MailScanner: No Virus detected Subject: RE: LF: Impedancebridge Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.60 (1.212-2003-09-23-exp) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.60 X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-Spam-Rating: 2 Dear Peter, LF Group, >Hello LFers, >is the Gereral Radio 1656 covering our LF-Band? I am not certain, but I believe this is an audio-frequency bridge - if it does work at 136k, it is probably with reduced specification. >May be that any impedance bridge using as RF detector some selective level >meter (pegelmesser) can help you for this measure. Selective level meters work very nicely as RF bridge detectors - Since it is only null detection that is needed, a receiver with "S" meter or output meter would also work fine. All you have to do is make sure there is enough attenuation between the bridge and RX/level meter so that the local QRM does not overload the front end. Cheers, Jim Moritz 73 de M0BMU