Return-Path: Received: (qmail 22965 invoked from network); 4 Nov 2002 15:28:30 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 4 Nov 2002 15:28:30 -0000 Received: (qmail 9498 invoked from network); 4 Nov 2002 15:28:01 -0000 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 4 Nov 2002 15:28:01 -0000 Received: from majordom by post.thorcom.com with local (Exim 4.10) id 188j7T-00052P-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 04 Nov 2002 15:26:27 +0000 Received: from [62.253.162.46] (helo=mta06-svc.ntlworld.com) by post.thorcom.com with esmtp (Exim 4.10) id 188j7S-00052G-00 for rsgb_lf_group@blacksheep.org; Mon, 04 Nov 2002 15:26:26 +0000 Received: from default ([62.253.49.8]) by mta06-svc.ntlworld.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with SMTP id <20021104152625.FJYV18329.mta06-svc.ntlworld.com@default> for ; Mon, 4 Nov 2002 15:26:25 +0000 Message-ID: <004101c28416$73aa9020$0831fd3e@default> From: "Tracey Gardner" To: rsgb_lf_group@blacksheep.org References: <2D280BB697C7EE4C979C5C89925418EF1BF592@TNS-FBU-2E-003.corp.telenor.no> Date: Mon, 4 Nov 2002 14:02:28 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: Re: Re: Siemens D2006 Selective Level Meter/Pegelmesser...and W&G SPM-3 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=0.5 required=5.0tests=REFERENCES,SPAM_PHRASE_00_01,USER_AGENT_OEversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Hello Jan-Martin The SPM-3 has a single xtal filter at the 650kHz 1st IF followed by a narrow LC filter at the 1.5kHz 2nd IF. The 1.5kHz filter is something like 100/120Hz wide at -6db. 73s Tracey SPM-3 is another interesting unit, but I believe the selectivity is based on LC-filters, and it really is too broad. Have kept a few for possible interest for 136kc activity in Norway.