Return-Path: Received: (qmail 337 invoked from network); 29 Aug 2001 06:34:01 -0000 Received: from unknown (HELO murphys-inbound.services.quay.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 29 Aug 2001 06:34:01 -0000 Received: (qmail 12798 invoked from network); 29 Aug 2001 06:32:09 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 29 Aug 2001 06:32:09 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15bymK-0003cm-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 29 Aug 2001 07:24:44 +0100 X-MSMail-Priority: Normal Received: from siaag2ab.compuserve.com ([149.174.40.132]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15bymJ-0003ch-00 for rsgb_lf_group@blacksheep.org; Wed, 29 Aug 2001 07:24:43 +0100 Received: (from mailgate@localhost) by siaag2ab.compuserve.com (8.9.3/8.9.3/SUN-1.12) id CAA22130 for rsgb_lf_group@blacksheep.org; Wed, 29 Aug 2001 02:24:03 -0400 (EDT) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Wed, 29 Aug 2001 02:23:35 -0400 From: "Holger 'Geri' Kinzel, DK8KW" Subject: LF: Re: Dynamic range for FM link (was: Carriers) To: rsgb_lf_group@blacksheep.org Message-ID: <200108290223_MC3-DDFB-B301@compuserve.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Disposition: inline Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Wolf, you mentioned a cheap LPD solution, which, off course, would also be necessary for any unattended use according to the German regulations. Depending on the distance between the remote receiving site and your house you might want to look into wireless microphones, that usually have a high dynamic range and also allow unattended license-free use. For the legal use you would only need the transmitter, the (normally more expensive) receiver can be replaced by something homemade. There are wireless microphone tranmitters available with a microphone connector to it (to which you can connect your LF receiver) for example in the 800 MHz range, which should allow quite a good range of several hundred meters (with 10 mW output), provided you use a directional antenna at the receiving site. Another possibility might be to look into a (license free) 2400 MHz Video link ... Best 73 Geri, DK8KW (W1KW) ... still without LF antenna at the moment, but will be back on the air hopefully during the next winter-LF-season ...