Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mk01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 32B89380000B1; Sat, 26 Nov 2011 10:00:01 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RUJii-0003oc-7p for rs_out_1@blacksheep.org; Sat, 26 Nov 2011 14:59:12 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RUJih-0003oS-Ps for rsgb_lf_group@blacksheep.org; Sat, 26 Nov 2011 14:59:11 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RUJig-0001lR-CW for rsgb_lf_group@blacksheep.org; Sat, 26 Nov 2011 14:59:11 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id pAQEx9Sj005022 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 26 Nov 2011 15:59:09 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id pAQEx9ku022244; Sat, 26 Nov 2011 15:59:09 +0100 Message-ID: <4ED0FE66.2070706@iup.uni-heidelberg.de> Date: Sat, 26 Nov 2011 15:57:42 +0100 From: =?ISO-8859-2?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org CC: Paul 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> In-Reply-To: <4ED0E0EC.9020404@iup.uni-heidelberg.de> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: VLF: 8970 Hz transmissions, soon again here Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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: 0:2:387499936:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d61854ed0fef167ee X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none 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 and 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 first successfully test :-) 73, Stefan/DK7FC