Return-Path: Received: (qmail 10770 invoked from network); 28 Aug 2001 00:46:55 -0000 Received: from unknown (HELO murphys-inbound.services.quay.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 28 Aug 2001 00:46:55 -0000 Received: (qmail 24930 invoked from network); 28 Aug 2001 00:45:05 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 28 Aug 2001 00:45:05 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15bWul-0004hU-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 28 Aug 2001 01:39:35 +0100 Received: from tomts6.bellnexxia.net ([209.226.175.26] helo=tomts6-srv.bellnexxia.net) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15bWuk-0004hP-00 for rsgb_lf_group@blacksheep.org; Tue, 28 Aug 2001 01:39:34 +0100 Received: from server1 ([209.226.189.16]) by tomts6-srv.bellnexxia.net (InterMail vM.4.01.03.16 201-229-121-116-20010115) with SMTP id <20010828003819.LIPR3759.tomts6-srv.bellnexxia.net@server1> for ; Mon, 27 Aug 2001 20:38:19 -0400 Message-ID: <000a01c12f59$b6f922a0$0a00a8c0@ThreeLakes.ca> From: "Larry Kayser" To: rsgb_lf_group@blacksheep.org References: <3.0.1.16.20010827102249.2d576aba@mail.cc.kuleuven.ac.be> Subject: Re: LF: Re: Carriers Date: Mon, 27 Aug 2001 20:38:06 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit 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 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Rik: > The critical parameter of a cheap FM-handy (or even a more expensive one) > will be the dynamic range. At my station the strongest local station (ON6ND > at about 40km) is 70dB stronger than my 'QRSS-noisefloor' at low QRN, DCF39 > is even 90dB above this level. > I'm afraid that a strong station will 'close' the entire band when using an > FM link, if you cannot keep DCF39 out of the passband things will be even > worse. If you can hear/see signals on your local setup the FM relayed signal will be only a tiny bit worse due to additional distortion introduced by the additional modulation and demodulation processes. There is no additional dynamic range needed on the proviso that the receiver is the same or comparable. Larry VA3LK