Return-Path: Received: from rly-ma09.mx.aol.com (rly-ma09.mail.aol.com [172.20.116.53]) by air-ma02.mail.aol.com (v121_r2.11) with ESMTP id MAILINMA021-8ce48ab1203377; Tue, 19 Aug 2008 14:33:48 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-ma09.mx.aol.com (v121_r2.11) with ESMTP id MAILRELAYINMA098-8ce48ab1203377; Tue, 19 Aug 2008 14:33:42 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1KVW1L-0008CE-Ni for rs_out_1@blacksheep.org; Tue, 19 Aug 2008 19:33:31 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1KVW1L-0008C5-AR for rsgb_lf_group@blacksheep.org; Tue, 19 Aug 2008 19:33:31 +0100 Received: from smtp2.wanadoo.co.uk ([193.252.22.157] helo=smtp2.freeserve.com) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1KVW1I-0000aL-D4 for rsgb_lf_group@blacksheep.org; Tue, 19 Aug 2008 19:33:31 +0100 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3113.me.freeserve.com (SMTP Server) with ESMTP id 619147000086 for ; Tue, 19 Aug 2008 20:33:20 +0200 (CEST) Received: from AGB (unknown [91.109.23.71]) by mwinf3113.me.freeserve.com (SMTP Server) with SMTP id E4EA97000082 for ; Tue, 19 Aug 2008 20:33:13 +0200 (CEST) X-ME-UUID: 20080819183313937.E4EA97000082@mwinf3113.me.freeserve.com Message-ID: <034D836CD37D497C80547813F78DE240@AGB> From: "Graham" To: References: <281222.921.qm@web26004.mail.ukl.yahoo.com> <001301c901e6$917c2d30$2201a8c0@PC2> <731EB49F88B309428FFDDD2423F810E441C128@HERMES4.ds.leeds.ac.uk> <48AADCE5.7070602@virgin.net> Date: Tue, 19 Aug 2008 19:33:08 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: Keyboard Modes for 600 Meters Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response 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=0.1 required=5.0 tests=MISSING_OUTLOOK_NAME 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 X-AOL-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_helo : n X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_822_from : n Interesting list of modes and tests , ''Comments: Several European operators ++ have experimented with 45 Baud RTTY using a narrow 23 Hz shift, with decent results. Our tests, however, had limited success when compared to the various PSK or multitone FSK modes. Given good signal strengths with little fading, you'll have good results and will be hard-pressed to keep ahead of its typing buffer. I tried a 200 Hz shift on a closed-circuit basis, and the weak signal performance was worse. '' I had the idea that the narrow olivia test gave the best print over distance , dose it not send more than one tone at any one time and therefore require a linear transmission system ? was some chatter (not monkey -please) that even the phase continuous modes like wspr actually need a linear system to maintain modulation architecture and to prevent the generation of 'gray noise' ?? http://www.w1tag.com/600M_Modes.htm G .. PS: ++ must mean you and me Gary :)