Return-Path: Received: (qmail 19069 invoked from network); 20 Dec 2001 16:19:26 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 20 Dec 2001 16:19:26 -0000 Content-Transfer-Encoding: 8bit Received: (qmail 23968 invoked from network); 20 Dec 2001 16:19:22 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 20 Dec 2001 16:19:22 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16H5sR-0000rf-00 for rsgb_lf_group-outgoing@blacksheep.org; Thu, 20 Dec 2001 16:16:59 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from bob.dera.gov.uk ([192.5.29.90]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16H5sQ-0000ra-00 for rsgb_lf_group@blacksheep.org; Thu, 20 Dec 2001 16:16:58 +0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id QAA08540; Thu, 20 Dec 2001 16:25:22 GMT Received: (qmail 25271 invoked from network); 20 Dec 2001 17:06:14 -0000 Received: from gauntlet.mail.dstl.gov.uk (192.168.9.10) by baton.dstl.gov.uk with SMTP; 20 Dec 2001 17:06:14 -0000 Received: by gauntlet.mail.dstl.gov.uk; id QAA14693; Thu, 20 Dec 2001 16:37:56 GMT Received: from unknown(172.17.128.171) by gauntlet.mail.dstl.gov.uk via smap (3.2) id xma014600; Thu, 20 Dec 01 16:37:25 GMT Received: from FRN-MAIL-R3.dstl.gov.uk (unverified) by mailguard.dstl.gov.uk (Content Technologies SMTPRS 4.1.5) with ESMTP id for ; Thu, 20 Dec 2001 16:21:08 +0000 Received: by frn-mail-r3.dstl.gov.uk with Internet Mail Service (5.5.2650.21) id ; Thu, 20 Dec 2001 16:15:40 -0000 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C672@pdw-mail-r1.dstl.gov.uk> From: "Talbot Andrew" To: "LF Group \(E-mail\)" Cc: "Holtby Linda C" Subject: LF: Multi Tone signalling / Long haul QSO's Date: Thu, 20 Dec 2001 16:15:32 -0000 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Software to generate two tone visual signalling is written and just needs final testing, then I should be able to put out some test transmissions within a day or so for evaluation of the technique. Are there any preferred freqencies for these tests ? If not I'll go for the top end of the band, centred on 137790.00Hz Since this mode has close to a 100% duty cycle, transmitters will have to be wound back a bit so tests will be either at 5 Watts from a small test PA (approx. 300uW ERP) or 400 Watts from the biggie, (24mW ERP) Initially, parameters will be something like 1 minute per tone with a tone spacing of 0.5Hz, giving a bandwidth of 3Hz, 1.5Hz above and below the nominated frequency. Coding will be as per Rik's posting, viz : (1 = lowest tone .. 7 = highest tone) : A = 11 H = 21 O = 31 V = 41 0 = 51 7 = 61 space = 71 B = 12 I = 22 P = 32 W = 42 1 = 52 8 = 62 report 'O' = 72 C = 13 J = 23 Q = 33 X = 43 2 = 53 9 = 63 report 'M' = 73 D = 14 K = 24 R = 34 Y = 44 3 = 54 report 'T' = 74 E = 15 L = 25 S = 35 Z = 45 4 = 55 'CQ' = 75 F = 16 M = 26 T = 36 5 = 56 / = 66 final 'K' = 76 G = 17 N = 27 U = 37 6 = 57 ? = 67 final 'SK' = 77 Any ideas for a name for this mode ?. And lets stay away from Q codes :-( Andy G4JNT -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful.