Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-db06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 6E118380000A8; Sat, 26 Nov 2011 10:22:49 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RUK4e-0004Dd-Bv for rs_out_1@blacksheep.org; Sat, 26 Nov 2011 15:21:52 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RUK4d-0004DT-Ts for rsgb_lf_group@blacksheep.org; Sat, 26 Nov 2011 15:21:51 +0000 Received: from mail-ww0-f41.google.com ([74.125.82.41]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RUK4b-00021t-IE for rsgb_lf_group@blacksheep.org; Sat, 26 Nov 2011 15:21:51 +0000 Received: by wwf22 with SMTP id 22so4138632wwf.4 for ; Sat, 26 Nov 2011 07:21:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=r2hCNuCcwn51h7ySExcZ/Uj8kqlO9bKkB+5d7rSmy7g=; b=sfrpFejgjCFMDTXGuABL4F9LcvVqQ8lOw1+4RAm257RStJlou4kgSopwSd2vY21IoF JO+s7hYcpsF9Qd2nV4evR8mNDDMGatNcGsTdDON4Dt89nsGd9PUDNOT+jXMhGKcJn4+0 R8sTQvIsUcH8cT3hh8up51sW7DHAYPr228uAk= MIME-Version: 1.0 Received: by 10.180.14.129 with SMTP id p1mr38920200wic.8.1322320903336; Sat, 26 Nov 2011 07:21:43 -0800 (PST) Received: by 10.180.126.7 with HTTP; Sat, 26 Nov 2011 07:21:43 -0800 (PST) In-Reply-To: <4ED0FE66.2070706@iup.uni-heidelberg.de> References: <66E491BAB91C48AF81191F4022525A14@DennisPC> <6FE757960E6C447781689D4F19A315AE@DennisPC> <4EC2C6EB.2080201@iup.uni-heidelberg.de> <4EC2DB14.9000807@talktalk.net> <4ECFD8B6.2050601@iup.uni-heidelberg.de> <4ED0E0EC.9020404@iup.uni-heidelberg.de> <4ED0FE66.2070706@iup.uni-heidelberg.de> Date: Sat, 26 Nov 2011 15:21:43 +0000 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: VLF: 8970 Hz transmissions, soon again here Content-Type: multipart/alternative; boundary=f46d040fa274b8f1d104b2a4d382 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:454523936:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m239.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d405a4ed1044967ce X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --f46d040fa274b8f1d104b2a4d382 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Stefan/VLF, My G3XBM 8.97kHz grabber is working currently looking for your signal. See https://sites.google.com/site/sub9khz/vlf-grabbers/xbm-grabber . Good luck everyone in finding Stefan's weaker signal. 73s Roger G3XBM 2011/11/26 Stefan Sch=E4fer > VLF, > > I'm now running 350W into the system and get about 0.8 A antenna current. > Strong audible partial discharges occurr on a parallel fixed plate > capacitor, spaced by 3 cola bottles (0.33l ;-) ). At 550 mH i have 25 kV > rms on the antenna and coil which seems to be no problem at all. > > The frequency is still a bit unstable since i took the DDS VFO which is > more comfortable to find the resonance. I will now try to slightly QRO an= d > then apply a fiber optic cable carrying the GPS locked frequency coming > from the PC/SpecLab, hopefully without to many phase glitches. Currently = i > may have an offset of some 20...30 mHz and a slight drift but it is a fir= st > successfully test :-) > > 73, Stefan/DK7FC > > > --=20 http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk https://sites.google.com/site/sub9khz/ http://qss2.blogspot.com/ --f46d040fa274b8f1d104b2a4d382 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Stefan/VLF,

My G3XBM 8.97kHz grabber is working currently looking fo= r your signal. See https://sites.google.com/site/sub9khz/vlf-grabbers/xbm-g= rabber .

Good luck everyone in finding Stefan's weaker signal.

73sRoger G3XBM



2011/11/26 Stefan Sc= h=E4fer <Stefan.Schaefer@iup.uni-heidelberg.de>
VLF,

I'm now running 350W into the system and get about 0.8 A antenna curren= t. Strong audible partial discharges occurr on a parallel fixed plate capac= itor, spaced by 3 cola bottles (0.33l ;-) ). At 550 mH i have 25 kV rms on = the antenna and coil which seems to be no problem at all.

The frequency is still a bit unstable since i took the DDS VFO which is mor= e comfortable to find the resonance. I will now try to slightly QRO and the= n apply a fiber optic cable carrying the GPS locked frequency coming from t= he PC/SpecLab, hopefully without to many phase glitches. Currently i may ha= ve an offset of some 20...30 mHz and a slight drift but it is a first succe= ssfully test :-)

73, Stefan/DK7FC





--

http://g= 3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
https:= //sites.google.com/site/sub9khz/
http://qss2.blogspot.com/

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