Return-Path: Received: from mtain-mb08.r1000.mx.aol.com (mtain-mb08.r1000.mx.aol.com [172.29.96.28]) by air-mc02.mail.aol.com (v128.2) with ESMTP id MAILINMC023-a8d54bc8c906181; Fri, 16 Apr 2010 16:31:02 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mb08.r1000.mx.aol.com (Internet Inbound) with ESMTP id 690043800008C; Fri, 16 Apr 2010 16:30:57 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1O2sB3-0004qB-1Y for rs_out_1@blacksheep.org; Fri, 16 Apr 2010 21:30:13 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1O2sB2-0004q2-JH for rsgb_lf_group@blacksheep.org; Fri, 16 Apr 2010 21:30:12 +0100 Received: from imr-db03.mx.aol.com ([205.188.91.97]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1O2sB0-0005OL-0P for rsgb_lf_group@blacksheep.org; Fri, 16 Apr 2010 21:30:12 +0100 Received: from mtaout-da04.r1000.mx.aol.com (mtaout-da04.r1000.mx.aol.com [172.29.51.132]) by imr-db03.mx.aol.com (8.14.1/8.14.1) with ESMTP id o3GKTwsO002458 for ; Fri, 16 Apr 2010 16:29:58 -0400 Received: from Black (g229249196.adsl.alicedsl.de [92.229.249.196]) by mtaout-da04.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id BD23AE00009F for ; Fri, 16 Apr 2010 16:29:57 -0400 (EDT) Message-ID: From: "Markus Vester" To: References: <001201cadd83$a1ed53e0$0301a8c0@your91hoehfy9g> In-Reply-To: Date: Fri, 16 Apr 2010 22:29:13 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6000.16480 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6000.16669 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: Dreamers Band update from W1VLF Content-Type: multipart/alternative; boundary="----=_NextPart_000_0017_01CADDB4.3D9CF9F0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40,HTML_MESSAGE, MISSING_OUTLOOK_NAME 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: 3039ac1d601c4bc8c9013b7c X-AOL-IP: 193.82.116.20 ------=_NextPart_000_0017_01CADDB4.3D9CF9F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear Paul and Jay, this is an excellent result, well done!=20 The crossover between reactive nearfield (E ~ r^-3) and farfield (r^-1= ) occurs at lambda/2/pi =3D 5.3 km. As you seem to have quite a bit of= margin there, your signal will be detectable very significantly beyon= d that. Assuming otherwise equal receive conditions, QRSS-120 should= get you more than 6 times further than QRSS-3. Best wishes, Markus (DF6NM) ----- Original Message -----=20 From: Warren Ziegler=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Friday, April 16, 2010 8:05 PM Subject: Re: LF: Dreamers Band update from W1VLF Paul, Great work! Nice looking coil! How much power can you crank= through it? At 5kM, I believe that you are still in the near field (9kHz wavelength is 33km), so signal will fall off at the 3rd power of distance until you reach far-field conditions. --=20 73 Warren K2ORS WD2XGJ WD2XSH/23 WE2XEB/2 WE2XGR/1 at 1:51 PM, Paul A. Cianciolo wrote: > Hello Folks, > > Today we made our first outdoor transmission on VLF. > > The system resonance forced the transmissions to take place on 889= 0 Hz at > least until I can get a variometer worked up. > > The distance is only 5 KM but the signal is quite good on QRSS3. > > I can only wonder how far the signal would go using QRSS 120??? > > Please comment if you can, this a great learning experience for me > > Thank you > > PauLC > W1VLF > > http://www.rescueelectronics.com/9-Kilohertz.html > ------=_NextPart_000_0017_01CADDB4.3D9CF9F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Dear Paul and Jay,
 
this is an excellent result, well don= e!=20
 
The crossover between reactive= nearfield (E ~=20 r^-3) and farfield (r^-1) occurs at lambda/2/pi =3D 5.3 km.&= nbsp;As you=20 seem to have quite a bit of margin there, your signal will be=20 detectable very significantly beyond that. Assuming otherwis= e equal=20 receive conditions, QRSS-120 should get you more than 6 times further= than=20 QRSS-3.
 
Best wishes,
Markus (DF6NM)
 
----- Original Message -----
From:=20 Warren= Ziegler=20
Sent: Friday, April 16, 2010= 8:05=20 PM
Subject: Re: LF: Dreamers Ban= d update=20 from W1VLF
=
Paul,

     = Great=20 work! Nice looking coil!  How much power can you crank through= it?
At=20 5kM, I believe that you are still in the near field (9kHz
wavelen= gth is=20 33km), so signal will fall off at the 3rd power of
distance until= you reach=20 far-field conditions.

--
73 Warren=20 K2ORS
          = ;     =20 WD2XGJ
         &nbs= p;     =20 WD2XSH/23
         &= nbsp;     =20 WE2XEB/2
         &n= bsp;     =20 WE2XGR/1


 at 1:51 PM, Paul A. Cianciolo <paulc@snet.net> wrote:
>= Hello=20 Folks,
>
> Today we made our first outdoor transmission= on=20 VLF.
>
> The system resonance forced the transmissions= to take=20 place on 8890 Hz at
> least until I can get a variometer worke= d=20 up.
>
> The distance is only 5 KM but the signal is quit= e good on=20 QRSS3.
>
> I can only wonder how far the signal would go= using=20 QRSS 120???
>
> Please comment if you can, this a great= learning=20 experience for me
>
> Thank you
>
> PauLC>=20 W1VLF
>
> http://www.rescueelectronics.com/9-Kilohertz.html<= /A>
>
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