Return-Path: Received: (qmail 4416 invoked from network); 10 May 2000 11:30:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by teachers.core.plus.net.uk with SMTP; 10 May 2000 11:30:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12pUWB-0000x6-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 10 May 2000 12:19:07 +0100 Received: from mserv1c.u-net.net ([195.102.240.33]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12pUWA-0000x1-00 for rsgb_lf_group@blacksheep.org; Wed, 10 May 2000 12:19:06 +0100 Received: from rsgb.u-net.com ([195.102.80.225] helo=rsgb.org.uk) by mserv1c.u-net.net with esmtp (Exim 2.10 #35) id 12pUVY-0002UT-00 for rsgb_lf_group@blacksheep.org; Wed, 10 May 2000 12:18:28 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from miked by rsgb.org.uk with SMTP (MDaemon.v2.8.7.0.R) for ; Wed, 10 May 2000 12:06:28 +0100 From: "Mike Dennison" X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 To: rsgb_lf_group@blacksheep.org Date: Wed, 10 May 2000 12:06:25 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: Re: LF: DFCW Parameters In-reply-to: <3.0.1.16.20000510092314.2e5f6dce@mail.cc.kuleuven.ac.be> References: X-Mailer: Pegasus Mail for Win32 (v3.11) X-MDaemon-Deliver-To: rsgb_lf_group@blacksheep.org X-Return-Path: miked@mail.rsgbhq Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: > In theory there is no need for these 'gaps', but a series of tests (mainly > conducted by DF8ZR, DF6NM and me) showed that these small 'gaps' had 2 > advantages : 1. It eases the reading of characters with a series of dots > or dashes (eg. O, S, J, 5 etc...) 2. It gives the TX a 'break' (reduces > the 'on/off' ratio) during long characters Ah, OK. I look forward to seeing this in practice. I must say that my first attempt at reading real DFCW - instead of typed on a WP - was much harder than I expected. I hope this improves things. Most stations seem to be taking advantage of the faster speed option (3s dots and dashes) but there is an advantage in having 9s dots and dashes so the speed is similar to QRSS but the S/N is better. I haven't yet modified my station for DFCW - this is a job for the summer. Mike, G3XDV (IO91VT) http://www.dennison.demon.co.uk/activity.htm