Return-Path: X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=0.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, FORGED_RCVD_HELO,HTML_50_60,HTML_MESSAGE,HTML_TINY_FONT,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u63A6SUM027154 for ; Sun, 3 Jul 2016 12:06:28 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bJeFg-0004Hz-9L for rs_out_1@blacksheep.org; Sun, 03 Jul 2016 11:03:48 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bJeFf-0004Hp-UJ for rsgb_lf_group@blacksheep.org; Sun, 03 Jul 2016 11:03:47 +0100 Received: from smtpcmd0648.aruba.it ([62.149.156.48] helo=smtpcmd01229.aruba.it) by relay1.thorcom.net with esmtp (Exim 4.87) (envelope-from ) id 1bJeFc-0002EL-4S for rsgb_lf_group@blacksheep.org; Sun, 03 Jul 2016 11:03:46 +0100 Received: from ik0vve.net ([62.149.158.90]) by smtpcmd06.ad.aruba.it with bizsmtp id EA3i1t00V1xJdJu01A3iRD; Sun, 03 Jul 2016 12:03:42 +0200 Date: Sun, 3 Jul 2016 12:03:38 +0200 Message-Id: In-Reply-To: <155ad9e5c3f-7470-a9c3@webprd-m69.mail.aol.com> References: <155ad9e5c3f-7470-a9c3@webprd-m69.mail.aol.com> MIME-Version: 1.0 X-Sensitivity: 3 From: "Max IK0VVE" To: rsgb_lf_group@blacksheep.org X-XaM3-API-Version: V3(R2) X-SenderIP: 212.66.112.179 X-HELO-Warning: Remote host 62.149.156.48 (smtpcmd0648.aruba.it) used invalid HELO/EHLO smtpcmd01229.aruba.it - verification failed X-Scan-Signature: 18c0ce4cbca80559a8b22b14cd653174 Subject: Re: Summertime VLF: 8270.0025 Friday, Sunday Content-Type: multipart/alternative; boundary="_=__=_XaM3_.1467540222.2A.252358.42.18935.52.42.007.1169042434" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8325 --_=__=_XaM3_.1467540222.2A.252358.42.18935.52.42.007.1169042434 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Markus,=0Amy testing grabber is online:=C2=A0http://www.ik0vve.net/?pa= ge_id=3D377=0AI don't know if it could be usefull... but..=0A=0A73, Max I= K0VVE=C2=A0=0A=0A=0A______________________________=C2=A0...here some of m= y HAM Radio projects...SkyGeM RotatorAntennaDinamicaRCR-DX=0Awww.ik0vve.n= et=0A=0A=0ADa: owner-rsgb_lf_group@blacksheep.org=0AA: rsgb_lf_group@blac= ksheep.org=0ACc: =0AData: Sat, 2 Jul 2016 17:58:04 -0400=0AOggetto: Summe= rtime VLF: 8270.0025 Friday, Sunday=0A=0A=0A=0A=0A=0AYesterday (July 1st)= I attempted to improve the cooling and to reduce the acoustical emission= from my VLF loading coil. A large 12=C2=A0volt fan was placed above the = top of the coil, powered directly by the rectified antenna current.=C2=A0= The high voltage=C2=A0and electric fields at=C2=A0the motor did not seem=C2= =A0affect the electronic commutation. To reduce=C2=A0heat buildup=C2=A0in= side the enclosure, the inner wall of the lower blue bucket was lined wit= h a coil made of=C2=A0thin polyethylene=C2=A0tube,=C2=A0which was manuall= y fed with cooling water=C2=A0by swapping the upper and lower canisters f= rom time to time. Finally the remaining narrow slot between=C2=A0the two = outer buckets was tightly sealed with tape, which indeed attenuated the a= nnoying coil beep very significantly.=C2=A0=0A=0AThen I ran a=C2=A0carrie= r on 8270.0025 from=C2=A011 to 15:30 UT.=C2=A0Unfortunately=C2=A0at that = time, the QRN was already quite=C2=A0strong, preventing=C2=A0a detection = in the 424 uHz grabber windows of DK7FC and OK2BVG. But=C2=A0after the lo= ng transmission, a couple of promising brighter pixels did show up at the= right place in the=C2=A047 uHz instances=C2=A0of in Heidelberg, and prob= ably also in Cumiana at IK1QFK.=0A=0AToday's weather was not favourable b= ut=C2=A0we=C2=A0expect better conditions tomorrow morning.=C2=A0So if all= goes well, I will try=C2=A0to repeat the carrier transmission on=C2=A0Su= nday=C2=A0morning=C2=A06 to 11 UT (July 3rd, overlapping with SAQ), hopef= ully in lower background noise.=C2=A0Tomorrow's goal would be clearer det= ection in Cumiana, but of course I'd also very much appreciate=C2=A0possi= ble detections from=C2=A0anyone anywhere else. I will=C2=A0also try to se= nd more EbNaut later but not tomorrow.=0A=0ABTW I have also reactivated m= y slow VLF grabber windows on the permanent "summer antenna"=C2=A0(a pass= ive E-field probe in the garden), which =C2=A0is permanently serving the = 137 kHz and Loran-C Receivers. On LF=C2=A0it=C2=A0is somewhat plagued by=C2= =A0ADSL and powerline pickup, but the=C2=A0QRM situation may be different= at 8.27 kHz. I=C2=A0actually need some amateur=C2=A0signals=C2=A0to find= out how good it is ;-).=0A=0AAll the best,=0AMarkus (DF6NM)=C2=A0=C2=A0=0A= =0A=0A=0A=0A --_=__=_XaM3_.1467540222.2A.252358.42.18935.52.42.007.1169042434 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hi Markus,my testing grabber is online: http://www.ik0vve.net/?page_id=3D377<= br>I don't know if it could be usefull... but..

73, Max IK0VVE&nbs= p;


______________________________

=
 
...here some of my HAM Radio projects...
SkyGeM Rotator
=
=


=0A
Da: own= er-rsgb_lf_group@blacksheep.org
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A: rsgb_lf= _group@blacksheep.org
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Cc:
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Da= ta: Sat, 2 Jul 2016 17:58:04 -0400
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= Oggetto= : Summertime VLF: 8270.0025 Friday, Sunday
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Yesterday (July 1st) I attempte= d to improve the cooling and to reduce the acoustical emission from my VL= F loading coil. A large 12 volt fan was placed above the top of the = coil, powered directly by the rectified antenna current. The high vo= ltage and electric fields at the motor did not seem affect= the electronic commutation. To reduce heat buildup inside the = enclosure, the inner wall of the lower blue bucket was lined with a coil = made of thin polyethylene tube, which was manually fed wit= h cooling water by swapping the upper and lower canisters from time = to time. Finally the remaining narrow slot between the two outer buc= kets was tightly sealed with tape, which indeed attenuated the annoying c= oil beep very significantly. 

Then I = ran a carrier on 8270.0025 from 11 to 15:30 UT. Unfortunat= ely at that time, the QRN was already quite strong, preventing&= nbsp;a detection in the 424 uHz grabber windows of DK7FC and OK2BVG. But&= nbsp;after the long transmission, a couple of promising brighter pixels d= id show up at the right place in the 47 uHz instances of in Hei= delberg, and probably also in Cumiana at IK1QFK.

Today's weather was not favourable but we expect better c= onditions tomorrow morning. So if all goes well, I will try to = repeat the carrier transmission on Sunday m= orning 6 to 11 UT (July 3rd, overlapping with SAQ), hopeful= ly in lower background noise. Tomorrow's goal would be clearer detec= tion in Cumiana, but of course I'd also very much appreciate possibl= e detections from anyone anywhere else. I will also try to send= more EbNaut later but not tomorrow.

BTW I= have also reactivated my slow VLF grabber windows on the permanent "summ= er antenna" (a passive E-field probe in the garden), which  is = permanently serving the 137 kHz and Loran-C Receivers. On LF it = ;is somewhat plagued by ADSL and powerline pickup, but the QRM = situation may be different at 8.27 kHz. I actually need some amateur=  signals to find out how good it is ;-).

All the best,
Markus (DF6NM)  

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