Return-Path: Received: (qmail 20032 invoked from network); 29 Nov 2002 19:20:28 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 29 Nov 2002 19:20:28 -0000 Received: (qmail 11584 invoked from network); 29 Nov 2002 19:20:17 -0000 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 29 Nov 2002 19:20:16 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18Hqfu-0003Ju-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 29 Nov 2002 19:19:42 +0000 Received: from [62.253.164.47] (helo=mta7-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.10) id 18Hqft-0003Jl-00 for rsgb_lf_group@blacksheep.org; Fri, 29 Nov 2002 19:19:41 +0000 Received: from ECSJAN2002 ([62.253.12.22]) by mta7-svc.business.ntl.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with ESMTP id <20021129191940.QAEW282.mta7-svc.business.ntl.com@ECSJAN2002> for ; Fri, 29 Nov 2002 19:19:40 +0000 From: "Richard Newstead" To: rsgb_lf_group@blacksheep.org Date: Fri, 29 Nov 2002 19:19:41 -0000 Message-ID: <000601c297dc$4510e690$160cfd3e@ECSJAN2002> MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.3416 Importance: Normal In-reply-to: <5.1.0.14.2.20021129180949.00a19cb0@mail.pncl.co.uk> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: RE: Osc drift Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-0.3 required=5.0tests=IN_REP_TO,SPAM_PHRASE_01_02version=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Transceiver drift is quite a problem. I am doing some propagation experiments on the HF bands that need long-term stability of 100mHz or less. This is way beyond what the average ham gear can do - my IC737 is good with around 700mHz drift (peak to peak cyclical) but still not good enough. My frequency standard is several orders of magnitude better. Getting rid of the drift is hard too, you can read of my problems at my website in the propagation section. The good news is that Wolf of Spectrum Lab fame is hoping to build in a drift cancelling system in the next version of Spectrum Lab. Drift cancelling is possible with the current version but is a bit fiddly - again there is an account in the propagation section at my web site. That's all for now so I'll slide off (if you get my drift). 73 Richard Newstead, G3CWI Buy and sell ham gear online at The Amazing Online Flea Market http://www.qsl.net/g3cwi -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Walter Blanchard Sent: 29 November 2002 19:02 To: rsgb_lf_group@blacksheep.org Subject: LF: Osc drift Transceiver tests for the mags ought to include a stability check on the oscillator in future.