X-GM-THRID: 1241983823860119488 X-Gmail-Labels: rsgb lf Delivered-To: daveyxm@gmail.com Received: by 10.78.172.11 with SMTP id u11cs184458hue; Sat, 14 Jul 2007 14:21:14 -0700 (PDT) Received: by 10.82.151.14 with SMTP id y14mr3599712bud.1184448074341; Sat, 14 Jul 2007 14:21:14 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id i7si19202319nfh.2007.07.14.14.21.10; Sat, 14 Jul 2007 14:21:14 -0700 (PDT) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) DomainKey-Status: bad (test mode) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1I9ozN-0001ra-Er for rs_out_1@blacksheep.org; Sat, 14 Jul 2007 22:17:17 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1I9ozM-0001rR-Ua for rsgb_lf_group@blacksheep.org; Sat, 14 Jul 2007 22:17:17 +0100 Received: from smtp812.mail.ird.yahoo.com ([217.146.188.72]) by relay2.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1I9ozL-0008MO-PV for rsgb_lf_group@blacksheep.org; Sat, 14 Jul 2007 22:17:16 +0100 Received: (qmail 58837 invoked from network); 14 Jul 2007 21:17:10 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=Received:X-YMail-OSG:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:Content-Transfer-Encoding:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=niu+1uq8WHqvX7PvL2nqJlpWy3823m0GvG16VQvAAjf5QW8suHjdMJGGBvast27OUHhev5vE8LXgNMvrn8Flj9via+8TqQlBDTtBO5BtR27b3Pp6VUGOysMrWUwz3NQ9EFiLk445c4O1PGULKpKO8+xlSCfz92tyoj7eAXMBAAY= ; Received: from unknown (HELO lark) (alan.melia@btinternet.com@81.131.4.165 with login) by smtp812.mail.ird.yahoo.com with SMTP; 14 Jul 2007 21:17:09 -0000 X-YMail-OSG: fDnY8a4VM1nEm68nygiXpRaAsYWyiQkxcaA2bTZMQqN4x0FCHXq3RLy_Qx__Vs6Z8Gtoe0hW4Q-- Message-ID: <000901c7c65c$5ce2b240$0300a8c0@lark> From: "Alan Melia" To: References: <000d01c7c653$bd5dba10$2101a8c0@PCRoelof> Date: Sat, 14 Jul 2007 22:16:38 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 DomainKey-Status: good (testing) X-Spam-Score: -0.4 (/) X-Spam-Report: autolearn=disabled,AWL=-0.431 Subject: LF: Re: Re: RE: G3YXM & G3WCB Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Status: O X-Status: X-Keywords: X-UID: 1120 Mmmm I dont think so Roelof .......the IF filter should not make any difference unless you have in-band qrm. In fact a very narrow filter before an FFT can create artifacts which are not actually there sometimes. NDB mode uses a 12Hz resolution, effectively a 12Hz brick-wall filter with no phase problems. But there can be problems due to sample overlap, and the display protocol. Cheers de Alan G3NYK ----- Original Message ----- From: Roelof Bakker To: Sent: 14 July 2007 21:15 Subject: LF: Re: RE: G3YXM & G3WCB >> snip This demonstrates the benefits of using narrow audio filters. Best regards, Roelof Bakker, pa0rdt