Return-Path: Received: (qmail 1150 invoked from network); 13 Dec 2002 00:28:52 -0000 Received: from warrior.services.quay.plus.net (212.159.14.227) by mailstore with SMTP; 13 Dec 2002 00:28:52 -0000 Received: (qmail 17019 invoked from network); 13 Dec 2002 00:28:21 -0000 Received: from post.thorcom.com (193.82.116.70) by warrior.services.quay.plus.net with SMTP; 13 Dec 2002 00:28:21 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18Mdfs-0004wl-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 13 Dec 2002 00:27:28 +0000 Received: from [212.135.6.13] (helo=smarthost3.mail.uk.easynet.net) by post.thorcom.com with esmtp (Exim 4.10) id 18Mdfr-0004wc-00 for rsgb_lf_group@blacksheep.org; Fri, 13 Dec 2002 00:27:27 +0000 Received: from tnt-13-226.easynet.co.uk ([212.134.22.226] helo=erica) by smarthost3.mail.uk.easynet.net with smtp (Exim 4.10) id 18Mdfq-000Egz-00 for rsgb_lf_group@blacksheep.org; Fri, 13 Dec 2002 00:27:27 +0000 Message-ID: <001001c2a23e$9aa6f420$e21686d4@erica> From: "g3ldo" To: rsgb_lf_group@blacksheep.org References: <3DF9020F.C2F0142@att.net> Date: Fri, 13 Dec 2002 00:28:00 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: 75KHz HBG Plotting, New and Improved, same price! Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-0.3 required=5.0tests=QUOTED_EMAIL_TEXT,REFERENCES,SPAM_PHRASE_00_01, USER_AGENT_OEversion=2.42 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Dexter, your HBG plot is most interesting and shows a greater stability of signal strength over the night period than on 136kHz. This implies that a cross-band QSO/HF would be possible even with the long transmission times associated with 73kHz experiments. Furthermore, the way you have made this information available makes it very useful for real time monitoring of conditions. What signal strength level on your plot indicates an 'opening' on 72kHz? Does the Rugby RTTY station on 73.2kHz follow the same pattern? > The HBG plotting is now running on a complete dedicated system. The > graph is now calibrated and reads actual input power into the 75 ohm > terminated input of the HP SLM. I finally figured out how to use the > 100 db dynamic range of this instrument. The output tracks perfectly > with Spectrum Lab. The antenna is a 3.3 meter square loop with no > amplification. > > The plot is uploaded every 5 minuets to: > > http://www.w4dex.com/75khz/hbg.jpg Regards, Peter, G3LDO e-mail Web >