Return-Path: <majordom@post.thorcom.com> Received: (qmail 3512 invoked from network); 6 Oct 1999 23:24:47 +0100 Received: from unknown (HELO magnet.force9.net) (195.166.128.26) by guiness.force9.net with SMTP; 6 Oct 1999 23:24:47 +0100 Received: (qmail 26173 invoked from network); 6 Oct 1999 22:30:56 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by magnet.plus.net.uk with SMTP; 6 Oct 1999 22:30:56 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 11YzCJ-0005ff-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 06 Oct 1999 23:06:07 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] ident=root) by post.thorcom.com with esmtp (Exim 3.02 #1) id 11YzCI-0005fZ-00 for rsgb_lf_group@blacksheep.org; Wed, 06 Oct 1999 23:06:06 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from central.zetnet.co.uk (central.zetnet.co.uk [194.247.47.20]) by irwell.zetnet.co.uk (8.9.3/8.9.3/Debian/GNU) with SMTP id XAA26000 for <rsgb_lf_group@blacksheep.org>; Wed, 6 Oct 1999 23:06:00 +0100 X-ZSender: g3ldo@zetnet.co.uk Message-ID: <1999100623191168199@zetnet.co.uk> Date: Wed, 6 Oct 1999 23:19:11 +0100 To: rsgb_lf_group@blacksheep.org From: "Peter Dodd" <g3ldo@zetnet.co.uk> X-Mailer: ZIMACS Version 1.20c 10000836 Subject: Re: LF: 73kHz - bad news Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: <majordom@post.thorcom.com> Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Hello Mike > The conclusion is that the Rugby RTTY transmission now has > significant white noise sidebands, extending up the band edges > (perhaps beyond). This ties in with reports I have had from others. > The noise is over 3kHz wide, even with the signal nulled to about S9. I checked out the sidebands of the growler using spectrogram and they are symetrical about the centre frequency so there is not much point in looking for a place at the top of the band. > Peter will be listening for me tomorrow morning when I will be > beaconing between 0700 and 0745UTC. I will also 'look' for the signal. I have checked out my transmitting system and it seems to be working as well as it did a year ago. The lack of success with QSOs on this band appears to be due to an increase in noise due to a different 'growler' modulation, which appears digital on the spectrogram. -- Regards, Peter, G3LDO <g3ldo@zetnet.co.uk>