Return-Path: Received: (qmail 32457 invoked from network); 2 May 2003 11:30:29 -0000 Received: from netmail01.services.quay.plus.net (212.159.14.219) by mailstore with SMTP; 2 May 2003 11:30:29 -0000 Received: (qmail 2751 invoked by uid 10001); 2 May 2003 11:30:28 -0000 Received: from post.thorcom.com (193.82.116.70) by netmail01.services.quay.plus.net with SMTP; 2 May 2003 11:30:28 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19BYjh-0002JF-Vd for rsgb_lf_group-outgoing@blacksheep.org; Fri, 02 May 2003 12:29:53 +0100 Received: from [212.159.14.221] (helo=netmail02.services.quay.plus.net) by post.thorcom.com with smtp (Exim 4.14) id 19BYjc-0002J6-Lp for rsgb_lf_group@blacksheep.org; Fri, 02 May 2003 12:29:48 +0100 Received: (qmail 26797 invoked from network); 2 May 2003 11:29:17 -0000 Received: from ctuash.sonnetinternet.co.uk (HELO Hugh) (212.159.90.113) by netmail02.services.quay.plus.net with SMTP; 2 May 2003 11:29:17 -0000 Message-ID: <002b01c3109e$081b7440$3704210a@Hugh> From: "Hugh M0WYE" To: rsgb_lf_group@blacksheep.org Date: Fri, 2 May 2003 12:28:49 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Way off subject ... and totally batty Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=0.0 required=5.0tests=noneversion=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 group, 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. The bats are attracted to our big halogen security lamp, because of the insects that fly round it. I haven't fed the signals into Argo yet ... 73 Hugh M0WYE