Return-Path: Received: (qmail 15919 invoked from network); 21 Jan 2000 00:33:38 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by bells.core.plus.net.uk with SMTP; 21 Jan 2000 00:33:38 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12BRmP-00083N-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 21 Jan 2000 00:18:21 +0000 Received: from tantalum.btinternet.com ([194.73.73.80]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12BRmO-00083I-00 for rsgb_lf_group@blacksheep.org; Fri, 21 Jan 2000 00:18:20 +0000 Received: from [213.1.140.97] (helo=default) by tantalum.btinternet.com with smtp (Exim 2.05 #1) id 12BRmD-0003d4-00 for rsgb_lf_group@blacksheep.org; Fri, 21 Jan 2000 00:18:11 +0000 Message-ID: <000201bf63a4$78d255a0$618c01d5@default> From: "Alan Melia" To: "rsgb_lf_group" Subject: LF: re Gamal's Rx report. Date: Thu, 20 Jan 2000 20:38:41 -0000 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 4.72.3110.5 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: Hi Gamal, I tried to e-mail you direct some time ago but the message bounced, I dont seem to have a working address for you. It seems from your report that the old 'uns, could still be the best for ultimate performance. I have been wondering about the DSP rxs that have been around for some time in professional circles. I guess one has to balance ultimate performance with ease of operation (by computer) now as there are probably no 'real' radio ops (like all of us!) around still. Lack of dynamic range suggests not enough bits in the ADC but I might be wrong about that. One question I am not sure about....the concentration on linear phase roofing filter....isn't this only really necessary for digital signals?? Though I must admit it probably gives good impulse response, and that seems important with the types of QRM and QRN on the 136 band. I know what Toni means about design.....they don't make 'em like they used to Toni. Now if I could only hide this AOR inside an old 51-J case with all the knobs working on the functions directly..... Thanks for the report Gamal very interesting. Cheers de Alan G3NYK Alan.Melia@btinternet.com