Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-md06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 9153338000041; Thu, 11 Aug 2011 10:04:59 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QrVrO-0000qL-J2 for rs_out_1@blacksheep.org; Thu, 11 Aug 2011 15:03:46 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QrVrN-0000qC-I5 for rsgb_lf_group@blacksheep.org; Thu, 11 Aug 2011 15:03:45 +0100 Received: from nm17-vm0.bullet.mail.ne1.yahoo.com ([98.138.91.58]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1QrVrL-00026L-Ko for rsgb_lf_group@blacksheep.org; Thu, 11 Aug 2011 15:03:45 +0100 Received: from [98.138.90.54] by nm17.bullet.mail.ne1.yahoo.com with NNFMP; 11 Aug 2011 14:03:36 -0000 Received: from [98.138.89.252] by tm7.bullet.mail.ne1.yahoo.com with NNFMP; 11 Aug 2011 14:03:36 -0000 Received: from [127.0.0.1] by omp1044.mail.ne1.yahoo.com with NNFMP; 11 Aug 2011 14:03:36 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 163670.82110.bm@omp1044.mail.ne1.yahoo.com Received: (qmail 57115 invoked by uid 60001); 11 Aug 2011 14:03:35 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1313071415; bh=OyQM3pS4eBQrfB4S3ik1EQj23srqRHFDvk6fC4WmnfQ=; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=v3UQ5QXKUXqHInMnPzbmSplmsnMkETdnjXoGQharQ983wZwR1nQUWrcFrvB9iFMJJLwjC5AgNzQI6jZZj4QFwQKvrZKsdRxQum4MAFKbXTQkFsCp6CI9xtz+/bKpRhMRA+Y88cjcjR5sG5QtEabduX19cVmnjJbCcye6SQPRZws= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=XRO3NVxgrAirG7NnqPAqIyTYFdFBCO9xxvQ9Lf8bMelRTkMGhcEUrkcLKZw3NTBwkwGp88T/9ChERwgQwLz+Y8l2TvNZNgdu1WmWovGs34tKKAPqM+0mHHoJug50qM91wPnCZQsyPAsRHQqI1dpABJti1m6ymY/FU3pI0GWAtXk=; X-YMail-OSG: EGfXuMUVM1kb52C7oe1GHGOQRQNPfGwB2KVMeyeLes2eKCY x7ANQrDvmnfujb9PEhKRLgcS0AiSHhYc.MxhZAR89oN8d4y08JIPrSCR4akO AsmZfn4rqPSe6XYFDLE5YRXBd3c2V.yozwoyViqGibzcHnMhsgLRdii8.wq. rwscyCLpwalBDA.SJKKvmzBr10noBLIqo0p4NSVgKY4hXqrmvZmiYMjAp3Tw c_fXvoROld2KUReeYyOtpksa.lMDuxz.fZI8UnGk7S9aFxQaBuTd6nbda9Le 8J7oIkUeOutgKHS_04.Df6L1O9YOeAFXcvvA86WwRr4EnrM9n9N.1jebqpF9 Idbu4jd9.h1kM2vUOzkv6VligOoWyT1xyMHskJRsfMXROR18ciStCF4jY.09 _vRUyiB8Q5v9JIXXmZv3GO1ta Received: from [151.99.187.181] by web111903.mail.gq1.yahoo.com via HTTP; Thu, 11 Aug 2011 07:03:35 PDT X-Mailer: YahooMailWebService/0.8.113.313619 References: <4E418609.6020500@iup.uni-heidelberg.de> <67A6F7BF45BF4A0193A3DCB53000A283@PcMinto> <008401cc56ce$2f1fb2c0$0401a8c0@xphd97xgq27nyf> <12C475F3F4C84B818461753F2E8A60A6@PcMinto> <4E41AECB.90808@iup.uni-heidelberg.de> <8D68749D37B94275855FDBA46A3F6C97@PcMinto> <4E427DFB.50801@iup.uni-heidelberg.de> <1313064500.49233.YahooMailNeo@web111905.mail.gq1.yahoo.com> <4E43CF0A.8020207@iup.uni-heidelberg.de> Message-ID: <1313071415.43423.YahooMailNeo@web111903.mail.gq1.yahoo.com> Date: Thu, 11 Aug 2011 07:03:35 -0700 (PDT) From: Daniele Tincani To: "rsgb_lf_group@blacksheep.org" In-Reply-To: <4E43CF0A.8020207@iup.uni-heidelberg.de> MIME-Version: 1.0 DomainKey-Status: good (testing) X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,HTML_TINY_FONT=1.425 Subject: Re: LF: Re: HB9ASB... Content-Type: multipart/alternative; boundary="0-1557612691-1313071415=:43423" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=1.0 required=5.0 tests=FORGED_YAHOO_RCVD,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-SCOLL-SCORE: 0:2:463942368:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m018.1 ; domain : yahoo.com DKIM : fail x-aol-sid: 3039ac1d605a4e43e18b36d0 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --0-1557612691-1313071415=:43423 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Yes I'm sure it works. BTW, I work in the optical networks area of a well-k= nown (swedish) company=A0of telecom equipments, so I really trust=A0optical= comms=A0;-)=0AThe interesting thing would be to compare in a very quiet lo= cation an active, optically-coupled=A0E-probe, with very short copper leads= , just for the battery; and another identical E-probe, installed at the sam= e height, on a similar pole, etc. with "conventional" feeder through a coax= cable. Just to see what changes.=0AI mean, if the cable actually is an int= egral part of such an antenna ("the cable is the real antenna", as I read s= ometimes in comments about the MiniWhip), I would expect a significant impr= ovement from using a coax rather than fiber. It=A0would be=A0necessary to f= ind a very quiet location for such test, to prevent local hum from giving a= n obvious advantage to the fiber solution.=0ARegards=0AD.=0A=A0=0A=0AFrom: = Stefan Sch=E4fer =0ATo: rsgb_lf_grou= p@blacksheep.org=0ASent: Thursday, August 11, 2011 2:46 PM=0ASubject: Re: L= F: Re: HB9ASB...=0A=0AHello Roelof, Daniele, LF,=0A=0AYes, it works.=0ABefo= re i started with the VLF stuff in February 2010 i did tests with LF active= antennas, battery supplied, and signal transfer by fiber optic cables. Act= ually it worked well with a single BF862 with the TX LED in the drain-to-pl= us stage and a 9V battery. This was an interesting alternative.=0A=0ABut la= ter i started with the LF grabber and so it becomes inpractical since i don= 't want to replace a battery all the time and thought a solar module might = be covered by snow in winther and so on...=0A=0ANice stuff to experiment. A= nyway you have to be in a quiet location but noise transfer on a coax scree= n was history... It also worked on a multi turn loop which i used in France= last year...=0A=0A73, Stefan/DK7FC=0A=0A=0AAm 11.08.2011 14:33, schrieb Ro= elof Bakker:=0A> Hello Daniele,=0A> =0A> I have the parts on hands, but hou= se restoration has prevented tests so far.=0A> I will report in due time.= =0A> =0A> However Stefan has used an optical link with a 30 cm active whip.= =0A> So, it certainly will work.=0A> =0A> 73,=0A> Roelof --0-1557612691-1313071415=:43423 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Yes I'm sure it works. BTW, I work in the optical ne= tworks area of a well-known (swedish) company of telecom equipments, s= o I really trust optical comms ;-)
The interesting thin= g would be to compare in a very quiet location an active, optically-coupled=  E-probe, with very short copper leads, just for the battery; and anot= her identical E-probe, installed at the same height, on a similar pole, etc= . with "conventional" feeder through a coax cable. Just to see what changes= .
I mean, if the cable= actually is an integral part of such an antenna ("the cable is the real an= tenna", as I read sometimes in comments about the MiniWhip), I would expect= a significant improvement from using a coax rather than fiber. It wou= ld be necessary to find a very quiet location for such test, to preven= t local hum from giving an obvious advantage to the fiber solution.
Regards
D.
 

From:= Stefan Sch=E4fer <Stefan.Schaefer@iup.uni-heidelberg.de><= BR>To: rsgb_lf_group@blacks= heep.org
Sent: Thursday,= August 11, 2011 2:46 PM
Subject: Re: LF: Re: HB9ASB...

Hello Roelof, Daniele, LF,
Yes, it works.
Before i started with the VLF stuff in February 2010= i did tests with LF active antennas, battery supplied, and signal transfer= by fiber optic cables. Actually it worked well with a single BF862 with th= e TX LED in the drain-to-plus stage and a 9V battery. This was an interesting alter= native.

But later i started with the LF grabber and so it becomes in= practical since i don't want to replace a battery all the time and thought = a solar module might be covered by snow in winther and so on...

Nice= stuff to experiment. Anyway you have to be in a quiet location but noise t= ransfer on a coax screen was history... It also worked on a multi turn loop= which i used in France last year...

73, Stefan/DK7FC


Am = 11.08.2011 14:33, schrieb Roelof Bakker:
> Hello Daniele,
> > I have the parts on hands, but house restoration has prevented tests = so far.
> I will report in due time.
>
> However Stefan = has used an optical link with a 30 cm active whip.
> So, it certainly= will work.
>
> 73,
> Roelof



=
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