Return-Path: Received: from mtain-mk12.r1000.mx.aol.com (mtain-mk12.r1000.mx.aol.com [172.29.97.144]) by air-dd03.mail.aol.com (v129.4) with ESMTP id MAILINDD034-86ab4d1b62193c2; Wed, 29 Dec 2010 11:30:17 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mk12.r1000.mx.aol.com (Internet Inbound) with ESMTP id 71BEE38000092; Wed, 29 Dec 2010 11:30:15 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PXytM-0000ms-Fz for rs_out_1@blacksheep.org; Wed, 29 Dec 2010 16:28:48 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PXytM-0000mj-0Q for rsgb_lf_group@blacksheep.org; Wed, 29 Dec 2010 16:28:48 +0000 Received: from blu0-omc1-s19.blu0.hotmail.com ([65.55.116.30]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PXytK-00088x-E6 for rsgb_lf_group@blacksheep.org; Wed, 29 Dec 2010 16:28:47 +0000 Received: from BLU146-W35 ([65.55.116.8]) by blu0-omc1-s19.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Wed, 29 Dec 2010 08:28:37 -0800 Message-ID: X-Originating-IP: [72.35.100.206] From: Laurence KL7UK To: Date: Wed, 29 Dec 2010 07:28:37 -0900 Importance: Normal In-Reply-To: References: MIME-Version: 1.0 X-OriginalArrivalTime: 29 Dec 2010 16:28:37.0657 (UTC) FILETIME=[720BA890:01CBA775] X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Content-Type: multipart/alternative; boundary="_7a0a9dfe-89d6-4a28-8cb1-95148cc45c37_" Subject: RE: LF: VLF noise measurement 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=FORGED_HOTMAIL_RCVD, 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: 3039ac1d61904d1b62165a9f X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --_7a0a9dfe-89d6-4a28-8cb1-95148cc45c37_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Looks good Roger - Im also following Stefans request - http://kl7uk.com/VL= FAlaska.html The roll off in sensitivity is intentional at the "HF" end.= Antennae is loop out in the woods to Jims design plus preamp, The preamp= is in the shack and battery powered - AC power still increases noise so= I have some work there. DHO38 is a good signal and better than the probe= - the loop being placed so hopefully the house and its noise is in the lo= ops null, well to some extent. The White line at 21.4kHz is my strongest= reference station NPM from Hawaii, just about due South of me, and a hau= nt of many Alaskans this time of year=20 =20 The loop is still firing North South over the Poles and shoving the loop= at 90 degrees will give another set of signals! The Asus XONAR DX 192Kb/9= 6 card is proving to give cleaner results than the bog standard, and anoth= er Creative 24bit sound blaster USB card is under test. =20 No luck running Ham radio delux, Windows 7 and USB/Serial remote control= of the R75 as I get Blue screens after a period so have temp put control= over to another XP machine, also giving another sound card. I have contro= l OK, and that took a lot of getting the "right "driver from Prolific but= something isnt liked. =20 A busy day yesterday digging snow and moving snow burms from A to C via B.= Fired cables back over trees and the large 500/137 vertical is back up an= d connected. Coll fingered stuff as temps around -20C =20 Laurence KL7 UK Wasilla Alaska =20 Date: Tue, 28 Dec 2010 21:11:09 +0000 From: rogerlapthorn@gmail.com To: rsgb_lf_group@blacksheep.org Subject: LF: VLF noise measurement Following Stefan's suggestion I'm currently recording the VLF noise 0-24kH= z at my QTH using the earth electrodes and small FET tuned preamp. Results= are being uploaded to my grabber at https://dl.dropbox.com/u/15047843/xbm= .jpg . The 24 hour period will end around mid-afternoon Wednesday.=20 Comments on the results would be appreciated - e.g. how this compares with= other station results, what would reduce the noise floor etc. 73s Roger G3XBM --=20 g3xbm-qrp.blogspot.com/ www.g3xbm.co.uk www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 =3D --_7a0a9dfe-89d6-4a28-8cb1-95148cc45c37_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Looks good Roger - Im also following Stefans request - http://kl7uk.com/VLFAlaska.html  The rol= l off in sensitivity is intentional at the "HF" end. Antennae is loop= out in the woods to Jims design plus preamp, The preamp is in the shack= and battery powered - AC power still increases noise so I have some work= there. DHO38 is a good signal and better than the probe - the loop being= placed so hopefully the house and its noise is in the loops null, well &n= bsp;to some extent. The White line at 21.4kHz is my strongest reference st= ation  NPM from Hawaii, just about due South of me, and a haunt= of many Alaskans this time of year
 
The loop is still firing North South over the Poles  and shoving the= loop at 90 degrees will give another set of signals! The Asus XONAR DX 19= 2Kb/96 card is proving to give cleaner results than the bog standard,= and another Creative 24bit sound blaster USB card is under test.
 
No luck running Ham radio delux, Windows 7 and USB/Serial remote control= of the R75 as I get Blue screens after a period so have temp put control= over to another XP machine, also giving another sound card. I have contro= l OK, and that took a lot of getting the "right "driver from Prolific but= something isnt liked.
 
A busy day yesterday digging snow and moving snow burms from A to C= via B. Fired cables back over trees and the large 500/137 verti= cal is back up and connected. Coll fingered stuff as temps around -20C
 
Laurence KL7 UK Wasilla Alaska
 
Date: Tue, 28 Dec 2010 21:11:09 +0000
From: rogerlapthorn@gmail.com
= To: rsgb_lf_group@blacksheep.org
Subject: LF: VLF noise measurement
=
Following Stefan's suggestion I'm currently recording the VLF noise 0-= 24kHz at my QTH using the earth electrodes and small FET tuned preamp. Res= ults are being uploaded to my grabber at https://dl.dropbox.com/u/15047843/xbm= .jpg . The 24 hour period will end around mid-afternoon Wednesday.
Comments on the results would be appreciated - e.g. how this compares= with other station results, what would reduce the noise floor etc.
73s
Roger G3XBM

--
g3xbm-qrp.blogspot.com/
www.g3xbm.co.uk
www.youtube.com/user/g3= xbm
G3XBM =   GQRP 1678    ISWL G11088
=3D --_7a0a9dfe-89d6-4a28-8cb1-95148cc45c37_--