Return-Path: Received: (qmail 15992 invoked from network); 6 May 2003 19:22:20 -0000 Content-Transfer-Encoding: 8bit Received: from netmail01.services.quay.plus.net (212.159.14.219) by mailstore with SMTP; 6 May 2003 19:22:20 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 9985 invoked by uid 10001); 6 May 2003 19:22:20 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from post.thorcom.com (193.82.116.70) by netmail01.services.quay.plus.net with SMTP; 6 May 2003 19:22:20 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19D809-0002oH-TU for rsgb_lf_group-outgoing@blacksheep.org; Tue, 06 May 2003 20:21:21 +0100 Received: from [207.136.80.122] (helo=parsec.look.ca) by post.thorcom.com with esmtp (Exim 4.14) id 19D804-0002o8-0g for rsgb_lf_group@blacksheep.org; Tue, 06 May 2003 20:21:16 +0100 Received: from [216.66.146.90] (helo=bc-van-mut-a53-10-90.look.ca) by parsec.look.ca with smtp (Exim 4.05) id 19D7zy-0001Vc-00 for rsgb_lf_group@blacksheep.org; Tue, 06 May 2003 19:21:11 +0000 X-Sender: eldridge@direct.ca X-Mailer: Windows Eudora Version 1.4.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org From: "Bob Eldridge " Message-ID: Date: Tue, 06 May 2003 19:21:11 +0000 Content-Type: text/plain; charset=us-ascii; format=flowed Subject: Re: LF: Re: Way off subject ... and totally batty X-Spam-Status: No, hits=-3.2 required=5.0tests=QUOTED_EMAIL_TEXTversion=2.53 X-Spam-Checker-Version: SpamAssassin 2.53 (1.174.2.15-2003-03-30-exp) 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 >Hi Hugh > >> Has anyone else tried this with their LF/VLF receivers ? >> >> I have put a microphone on my SLM and have been receiving bats. I used a >> tiny electret condenser mic capsule on the input of the D2006, with the >> usual 1.5V cell and blocking cap to power the capsule. I was able to pick >up >> bat sounds up to 55kHz. There were some clicks down at 22.5kHz, and some >> twitters around 45kHz. I think they are just the common or garden >> Pipistrelle bats. >> > Bear in mind though that the average microphone is not designed to receive much above voice/music frequencies. Bob VE7BS