Return-Path: Received: from mtain-dj05.r1000.mx.aol.com (mtain-dj05.r1000.mail.aol.com [172.19.187.141]) by air-dd06.mail.aol.com (v128.1) with ESMTP id MAILINDD063-865c4bc461a1362; Tue, 13 Apr 2010 08:20:49 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-dj05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 34709380000B3; Tue, 13 Apr 2010 08:20:48 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1O1f5c-0001kL-BC for rs_out_1@blacksheep.org; Tue, 13 Apr 2010 13:19:36 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1O1f5b-0001kC-O2 for rsgb_lf_group@blacksheep.org; Tue, 13 Apr 2010 13:19:35 +0100 Received: from cavuit01.kulnet.kuleuven.be ([134.58.240.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1O1f5W-0007ho-Pa for rsgb_lf_group@blacksheep.org; Tue, 13 Apr 2010 13:19:35 +0100 Received: from smtps01.kuleuven.be (smtpshost01.kulnet.kuleuven.be [134.58.240.74]) by cavuit01.kulnet.kuleuven.be (Postfix) with ESMTP id D768A7B8054 for ; Tue, 13 Apr 2010 14:19:20 +0200 (CEST) Received: from ICTS-S-HUB-N1.luna.kuleuven.be (icts-s-hub-n1.luna.kuleuven.be [10.112.9.11]) by smtps01.kuleuven.be (Postfix) with ESMTP id C387731E703 for ; Tue, 13 Apr 2010 14:19:20 +0200 (CEST) Received: from ICTS-S-EXC2-CA.luna.kuleuven.be ([10.112.11.13]) by ICTS-S-HUB-N1.luna.kuleuven.be ([10.112.9.11]) with mapi; Tue, 13 Apr 2010 14:19:20 +0200 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Date: Tue, 13 Apr 2010 14:16:17 +0200 Thread-Topic: VLF QRM free window becomes smaller? Thread-Index: AcrZgbP02b8Quq4xQx2Tuj8zFsU74wAF2m24AAF4odQAWQeGQA== Message-ID: References: <4BC1E717.21514.149803B@mike.dennison.ntlworld.com> <38A51B74B884D74083D7950AD0DD85E82A1BDC@File-Server-HST.hst.e-technik.tu-darmstadt.de>,<38A51B74B884D74083D7950AD0DD85E82A1BDD@File-Server-HST.hst.e-technik.tu-darmstadt.de> In-Reply-To: <38A51B74B884D74083D7950AD0DD85E82A1BDD@File-Server-HST.hst.e-technik.tu-darmstadt.de> Accept-Language: nl-NL, nl-BE Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: nl-NL, nl-BE MIME-Version: 1.0 X-KULeuven-Information: Katholieke Universiteit Leuven X-KULeuven-Scanned: Found to be clean X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: RE: VLF QRM free window becomes smaller? Content-Type: multipart/alternative; boundary="_000_BF4A524700075746A6467658DFC7102C19A043E54DICTSSEXC2CAlu_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE, TO_ADDRESS_EQ_REAL 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-sid: 3039cdbc9d0a4bc461a00722 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --_000_BF4A524700075746A6467658DFC7102C19A043E54DICTSSEXC2CAlu_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Stefan, maybe thunderstorms coming up in the afternoon ? 73, Rik ON7YD ________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.or= g] namens Stefan Sch=E4fer [schaefer@hst.tu-darmstadt.de] Verzonden: zondag 11 april 2010 20:19 Aan: rsgb_lf_group@blacksheep.org Onderwerp: VLF: VLF QRM free window becomes smaller? Dear LF, Taking a look on Markus' VLF grabber, it seems, the time window with a min= imum QRN becomes smaller in the last weeks(see the picture). Has anyone ex= perience (Paul?) if this is a daily accident or a tendency when going to= the summer? What will be in one month? BTW, my 600W PA almost works; the amperemeter (1A full range) is now inser= ted into the coil and is calibrated; i built up a narrow band active E fie= ld antenna for the dreamers band (2x BF862, 2 band pass filters, BW abt 50= 0Hz, preamp noise 20dB above soundcard noise, preamp + VLF noise 40dB abov= e soundcard noise, decoupling AF transformer) that will give my new VLF gr= abber in Heidelberg :-) Things are going on and new records will have to be done :-) Best 73, Stefan/DK7FC --_000_BF4A524700075746A6467658DFC7102C19A043E54DICTSSEXC2CAlu_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Stefan,
 
maybe thunderstorms coming up in the= afternoon ?
 
73, Rik  ON7YD
 
Van: owner-rsgb_= lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens Stefan= Sch=E4fer [schaefer@hst.tu-darmstadt.de]
Verzonden: zondag 11 april 2010 20:19
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: VLF: VLF QRM free window becomes smaller?

Dear LF,

Taking a look on Markus' VLF grabber, it seems, the time window with a= minimum QRN becomes smaller in the last weeks(see the picture). Has anyon= e experience (Paul?) if this is a daily accident or a tendency when going= to the summer? What will be in one month?

BTW, my 600W PA almost works; the amperemeter (1A full range) = ;is now inserted into the coil and is calibrated; i built up a narrow band= active E field antenna for the dreamers band (2x BF862, 2 band pass filte= rs, BW abt 500Hz, preamp noise 20dB above soundcard noise, preamp + VLF noise 40dB above soundcard noise, decoupling AF= transformer) that will give my new VLF grabber in Heidelberg :-)

Things are going on and new records will have to be done :-)

Best 73, Stefan/DK7FC

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