Return-Path: Received: (qmail 16635 invoked from network); 27 Nov 2001 18:00:04 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur-qfe1-smtp-plusnet.harl.plus.net with SMTP; 27 Nov 2001 18:00:04 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 6968 invoked from network); 27 Nov 2001 18:00:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 27 Nov 2001 18:00:23 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 168mQd-0004Tf-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 27 Nov 2001 17:53:55 +0000 Received: from hestia.herts.ac.uk ([147.197.200.9]) by post.thorcom.com with esmtp (Exim 3.33 #2) id 168mQc-0004Ta-00 for rsgb_lf_group@blacksheep.org; Tue, 27 Nov 2001 17:53:54 +0000 Received: from gemini ([147.197.200.44] helo=gemini.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 168mPv-00010o-00 for rsgb_lf_group@blacksheep.org; Tue, 27 Nov 2001 17:53:11 +0000 Received: from [147.197.232.252] (helo=rsch-15.herts.ac.uk) by gemini.herts.ac.uk with esmtp (Exim 3.33 #1) id 168mOo-0006vk-00 for rsgb_lf_group@blacksheep.org; Tue, 27 Nov 2001 17:52:02 +0000 Message-ID: <5.1.0.14.0.20011127170009.00aacf50@gemini.herts.ac.uk> X-Sender: mj9ar@gemini.herts.ac.uk X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Tue, 27 Nov 2001 17:52:01 +0000 To: rsgb_lf_group@blacksheep.org From: "James Moritz" Subject: LF: Re: IMAGE Satellite Experiment / 73kHz beacon In-reply-to: <1e.1eeee56c.2935182f@aol.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Dear Wolf, LF Group, I did listen for the IMAGE satellite on 24th, but although I was able to get rid of most mains QRM above 6kHz, also heard nothing, apart from very loud QRN and related peculiar noises. I could not see or hear the Alpha beacons, which had been clearly audible the previous day, so not sure if just very noisy conditions, or these off the air too. On the basis that 73kHz propagation seems to be in the doldrums at the moment, I will not run the beacon tonight, and wait until the 73.25kHz Rugby signal has picked up again on the other side of the pond. Re: monitoring the signal levels around 73k - I am something of a fan of DL4YHF's Spectrum Lab - the spectrum analyser display gives you a direct measure in dB of the signal ampltude. If you set up the colour scale for the waterfall display to something that you like, varying the "brightness" and "contrast" sliders vary the display from an Argo-like high contrast good for reading QRSS to a low contast, multi coloured display that is better for looking at relative signal levels. Cheers, Jim Moritz 73 de M0BMU