Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 429A5380000E4; Sat, 26 Nov 2011 07:44:24 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RUHbF-0002e7-6P for rs_out_1@blacksheep.org; Sat, 26 Nov 2011 12:43:21 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RUHbE-0002dx-DP for rsgb_lf_group@blacksheep.org; Sat, 26 Nov 2011 12:43:20 +0000 Received: from mail16.primus.ca ([216.254.141.183] helo=mail-10.primus.ca) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RUHbB-0000hp-Rp for rsgb_lf_group@blacksheep.org; Sat, 26 Nov 2011 12:43:20 +0000 Received: from dyn-dsl-bb-76-75-67-107.nrtco.net ([76.75.67.107] helo=Bigmachine.magma.ca) by mail-10.primus.ca with esmtpa (Exim 4.72) (envelope-from ) id 1RUHb9-0003vj-35 for rsgb_lf_group@blacksheep.org; Sat, 26 Nov 2011 07:43:16 -0500 X-Mailer: QUALCOMM Windows Eudora Version 7.1.0.9 Date: Sat, 26 Nov 2011 07:43:17 -0500 To: rsgb_lf_group@blacksheep.org From: Bill de Carle In-Reply-To: <4ECFD8B6.2050601@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> Mime-Version: 1.0 X-Authenticated: ve2iq - dyn-dsl-bb-76-75-67-107.nrtco.net (Bigmachine.magma.ca) [76.75.67.107] X-Spam-Score: 0.9 (/) X-Spam-Report: autolearn=disabled,HTML_10_20=0.945,HTML_MESSAGE=0.001 Message-Id: Subject: Re: VLF: 8970 Hz transmissions, soon again here Content-Type: multipart/alternative; boundary="=====================_3943580==.ALT" 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=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: 0:2:435911840:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1dc1494ed0df2808fd X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --=====================_3943580==.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed VLF grabber at VE2IQ is on and will be active through the day. We can always dream. Good luck Stefan! http://www.magma.ca/~ve2iq/grabs Bill At 01:04 PM 11/25/2011, Stefan DK7FC wrote: >Eddie, VLF, > >The coil and PA and all the parts are here now and maybe i will do >first tests tomorrow in the afternoon on 8970 Hz. > >The goals would be to resonate on the frequency and apply 50 kV rms >or more. Oh i just calculated: My coil has about 550 mH and the >antenna 473 pF. So i need about 100 pF from somewhere else, >remembering my homemade plate capacitor with the cola bottles as the >spacing insolator ;-) The coil has about 320 Ohm DC resistance and >if i actually want to apply 50 kV, i would need 1.2 kW for that. No >problem for the PA i think. The ERP will be below 1 mW anyway :-( > >But the background noise is extremely low in the last time and if i >can a stable signal over several hours i expect to be visible in >many spectrograms. --=====================_3943580==.ALT Content-Type: text/html; charset="us-ascii" VLF grabber at VE2IQ is on and will be active through the day. We can always dream. Good luck Stefan!

http://www.magma.ca/~ve2iq/grabs

Bill

At 01:04 PM 11/25/2011, Stefan DK7FC wrote:

Eddie, VLF,

The coil and PA and all the parts are here now and maybe i will do first tests tomorrow in the afternoon on 8970 Hz.

The goals would be to resonate on the frequency and apply 50 kV rms or more. Oh i just calculated: My coil has about 550 mH and the antenna 473 pF. So i need about 100 pF from somewhere else, remembering my homemade plate capacitor with the cola bottles as the spacing insolator ;-) The coil has about 320 Ohm DC resistance and if i actually want to apply 50 kV, i would need 1.2 kW for that. No problem for the PA i think. The ERP will be below 1 mW anyway :-(

But the background noise is extremely low in the last time and if i can a stable signal over several hours i expect to be visible in many spectrograms.

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