Return-Path: Received: from mtain-me06.r1000.mx.aol.com (mtain-me06.r1000.mx.aol.com [172.29.96.142]) by air-mf08.mail.aol.com (v128.3) with ESMTP id MAILINMF083-8bf74bd06ec03b8; Thu, 22 Apr 2010 11:44:00 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-me06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 33A1438000093; Thu, 22 Apr 2010 11:43:58 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1O4yXr-0007Mx-Mg for rs_out_1@blacksheep.org; Thu, 22 Apr 2010 16:42:27 +0100 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1O4yXn-0007Ju-B2 for rsgb_lf_group@blacksheep.org; Thu, 22 Apr 2010 16:42:23 +0100 Received: from mailgw10.se.ericsson.net ([193.180.251.61]) by relay2.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1O4yXg-0001Gb-VX for rsgb_lf_group@blacksheep.org; Thu, 22 Apr 2010 16:42:22 +0100 X-AuditID: c1b4fb3d-b7bf6ae000005bec-19-4bd06e43c1c7 Received: from esealmw126.eemea.ericsson.se (Unknown_Domain [153.88.253.124]) by mailgw10.se.ericsson.net (Symantec Brightmail Gateway) with SMTP id B7.36.23532.34E60DB4; Thu, 22 Apr 2010 17:41:55 +0200 (CEST) Received: from esealmw110.eemea.ericsson.se ([153.88.200.78]) by esealmw126.eemea.ericsson.se with Microsoft SMTPSVC(6.0.3790.3959); Thu, 22 Apr 2010 17:41:56 +0200 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Date: Thu, 22 Apr 2010 17:41:55 +0200 Message-ID: <4D95FB39404AA04CA998E7F63B1A2E5F0437E693@esealmw110.eemea.ericsson.se> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: LF: vlf stuff Thread-Index: AcriLrBIj7tyHq50QWSkjJUCzZlbvQAAnywQ References: ,<4BCFF4B0.1060408@iup.uni-heidelberg.de> From: "Daniele Tincani" To: X-OriginalArrivalTime: 22 Apr 2010 15:41:56.0090 (UTC) FILETIME=[567F35A0:01CAE232] X-Brightmail-Tracker: AAAAAA== X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CAE232.5666F7F3" Subject: RE: LF: vlf stuff 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_40_50,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-sid: 3039ac1d608e4bd06ebe39fe X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) ------_=_NextPart_001_01CAE232.5666F7F3 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Lawrence, probably you could use the lowest-frequency alpha station for= calibration purposes. I heard from Wolf that he was working on a built-in frequency calibration= tool for SpectrumLab but I don't know about current progress. I have so much noise at my sub-urban location that I have almost renounced= to receive something interesting below 10KHz. VLF gentlemen here in this= group suggested that I switch on a different solution that is to find a= quieter place far from civilization :-) A portable E-probe plus a digital= recorder should be a better setup for me in that case... Cheers D. =20 ________________________________ From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@black= sheep.org] On Behalf Of Laurence KL1X Sent: gioved=EC 22 aprile 2010 17.09 To: rsgb_lf_group@blacksheep.org Subject: RE: LF: vlf stuff =20 Stefan, Xtain, Danielle, Bob - thanks for the comments - =20 On the QRM from the PC - no I dont get any (problematic) unless the loop= is within 3 metres or so of the loop - I have a 15m length of RG58 50 ohm= coax to the loop and the background iono/qrn masks any noise that I comes= from the unit - Ill take some screen shots and publish.=20 =20 Even some 400m from the nearest power line I can see 60Hz harmonics and so= me PLC stuff so Ill have to go out into the Plains a bit further.=20 =20 The aim perhaps is to look for W1VLF or other signals (yourselves) sometim= e in the future - =20 I did some VLF receiving stuff is Asia Pacfic countries over the past few= years - an example from China http://kl1x.com/vlfchina.jpg and from the= Polar regions some 30 years ago. =20 =20 I didnt get a lot of time last night as I was getting bitten by mosquitoes= and was wearing short trousers but we had thunderstorms to our West which= spoilt any long distance reception -so much so that Alphas werent visible= - The normal US and some other VLF stations were good enough. Ill wait fo= r a quieter time and smother myself with "bug dope" but the loop/preamp wa= s producing good results (its very very quiet) - =20 I used the loop right next to the Television to calibrate the receiver lo= oking at the sync but I need to revisit this given some of the comments ab= out digital TV's. =20 Laurence KL 1 X in 5 bartlesville OK http://kl1x.com =20 ________________________________ =20 ________________________________ Hotmail is redefining busy with tools for the New Busy. Get more from your= inbox. See how. =20 ------_=_NextPart_001_01CAE232.5666F7F3 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Lawrence, probably you could use the lowest-fre= quency alpha station for calibration purposes.

I heard from Wolf that he was working on a built-i= n frequency calibration tool for SpectrumLab but I don’t know about current progress.

I have so much noise at my sub-urban location that= I have almost renounced to receive something interesting below 10KHz. VLF gentlemen here in this= group suggested that I switch on a different solution that is to find a quieter= place far from civilization J A portable E-probe plus a digital recorder should be a better setup for me in that case…

Cheers

D.

 

From:<= font size=3D2 face=3DTahoma> owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.= org] On Behalf Of Laurence= KL1X
Sent: gioved=EC 22 aprile= 2010 17.09
To: rsgb_lf_group@blackshee= p.org
Subject: RE: LF: vlf stuff<= /span>

 

Stefan, Xtain, Danielle, Bob - thanks= for the comments -
 
On the QRM from the PC - no I dont get any (problematic) unless the loop= is within 3 metres or so of the loop - I have a 15m length of RG58 50 oh= m coax to the loop and the background iono/qrn masks any noise that I c= omes from the unit - Ill take some screen shots and publish.
 
Even some 400m from the nearest power line I can see 60Hz harmonics and so= me PLC stuff so Ill have to go out into the Plains a bit further.
 
The aim perhaps is to look for W1VLF or other signals (yourselves) sometim= e in the future -
 
I did some VLF receiving stuff is Asia Pacfic countries over the= past few years - an example from China http://kl1x.com/vlfchina.jpg  and from the Polar regions some 30 years ago.
 
 
I didnt get a lot of time last night as I was getting bitten by mosquitoes and was wearing short trousers but we had thunderstorms&nb= sp;to our West which spoilt any long distance reception -so much so that Alphas werent visible - The normal US and some other VLF stations were good enoug= h. Ill wait for a quieter time and smother myself with "bug dope" but the loop/preamp= was producing good results (its very very quiet) -
 
 I used the loop right next to the Television to calibrate the receiv= er looking at the sync but I need to revisit this given some of the comm= ents about digital TV's.
 
Laurence KL 1 X in 5
bartlesville OK
http://kl1x.com

 

 

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