Return-Path: Received: from mtain-da06.r1000.mx.aol.com (mtain-da06.r1000.mx.aol.com [172.29.64.78]) by air-mf04.mail.aol.com (v128.3) with ESMTP id MAILINMF044-8be84bc9c6551df; Sat, 17 Apr 2010 10:31:49 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-da06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 5F581380002C2; Sat, 17 Apr 2010 10:31:47 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1O392c-0007bR-VP for rs_out_1@blacksheep.org; Sat, 17 Apr 2010 15:30:38 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1O392c-0007bI-6d for rsgb_lf_group@blacksheep.org; Sat, 17 Apr 2010 15:30:38 +0100 Received: from cavuit02.kulnet.kuleuven.be ([134.58.240.44]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1O392Z-0001gH-Ub for rsgb_lf_group@blacksheep.org; Sat, 17 Apr 2010 15:30:38 +0100 Received: from smtps01.kuleuven.be (smtpshost01.kulnet.kuleuven.be [134.58.240.74]) by cavuit02.kulnet.kuleuven.be (Postfix) with ESMTP id B25E351C001 for ; Sat, 17 Apr 2010 16:30:26 +0200 (CEST) Received: from ICTS-S-HUB-N2.luna.kuleuven.be (icts-s-hub-n2.luna.kuleuven.be [10.112.9.12]) by smtps01.kuleuven.be (Postfix) with ESMTP id AFDFD31E702 for ; Sat, 17 Apr 2010 16:30:26 +0200 (CEST) Received: from ICTS-S-EXC2-CA.luna.kuleuven.be ([10.112.11.13]) by ICTS-S-HUB-N2.luna.kuleuven.be ([10.112.9.12]) with mapi; Sat, 17 Apr 2010 16:30:26 +0200 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Date: Sat, 17 Apr 2010 16:30:26 +0200 Thread-Topic: LF: Dreamers Band update from W1VLF Thread-Index: AcreNmntQcKpaHhnSS6wQc5eg0BM3AAAyK5A Message-ID: References: , In-Reply-To: Accept-Language: nl-NL, nl-BE Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: nl-NL, nl-BE MIME-Version: 1.0 X-KULeuven-Information: Katholieke Universiteit Leuven X-KULeuven-Scanned: Found to be clean X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be 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="_000_BF4A524700075746A6467658DFC7102C19A2156E3EICTSSEXC2CAlu_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_50_60,HTML_FONTCOLOR_BLUE, 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-sid: 3039ac1d404e4bc9c6537d5c X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --_000_BF4A524700075746A6467658DFC7102C19A2156E3EICTSSEXC2CAlu_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello Paul, congrats on your achievement. Based on L =3D 0.277H and f =3D 8890Hz the antenna capacitance is 1.16nF.= You must have an impressive amount of wire up in the air. Regarding "ground" : did you try radials ? 73, Rik ON7YD ________________________________ Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.or= g] namens Paul A. Cianciolo [paulc@snet.net] Verzonden: zaterdag 17 april 2010 15:53 Aan: rsgb_lf_group@blacksheep.org Onderwerp: RE: LF: Dreamers Band update from W1VLF Markus Valued commentary as always. Plans are to continue making improvements in= the station. What are your feeling about the ground at 9 KHz? Currently I am using 3 2 meter ground rods spaced 2 meters apart and 1= meter distant from the concrete basement wall of my shack. This setup is not optimum I understand and was never intended to be final= ground system for my regular ham station. As a very quick and crude test I pounded an aluminum pole into the earth= 2 meters deep near the 9 KHz coil. When this was connected to the existing ground there was a very small incr= ease in the current meter. Antenna system impedance here is about 1250 Ohms with and antenna current= of approx. 200 ma. Lots of work to do!!! I will make another post on grounds to the group as well. Thank you PauLC W1VLF -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@black= sheep.org]On Behalf Of Markus Vester Sent: Friday, April 16, 2010 4:29 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Dreamers Band update from W1VLF Dear Paul and Jay, this is an excellent result, well done! The crossover between reactive nearfield (E ~ r^-3) and farfield (r^-1) oc= curs 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 beyond that. Ass= uming otherwise equal receive conditions, QRSS-120 should get you more tha= n 6 times further than QRSS-3. Best wishes, Markus (DF6NM) ----- Original Message ----- From: Warren Ziegler To: rsgb_lf_group@blacksheep.org 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. -- 73 Warren K2ORS WD2XGJ WD2XSH/23 WE2XEB/2 WE2XGR/1 at 1:51 PM, Paul A. Cianciolo > wro= te: > Hello Folks, > > Today we made our first outdoor transmission on VLF. > > The system resonance forced the transmissions to take place on 8890 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 > --_000_BF4A524700075746A6467658DFC7102C19A2156E3EICTSSEXC2CAlu_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hello Paul,
 
congrats on your achievement.=
Based on L =3D 0.277H and f =3D 8890= Hz the antenna capacitance is 1.16nF. You must have an impressiv= e amount of wire up in the air.
Regarding "ground" : did= you try radials ? 
 
73, Rik  ON7YD 
 
Van: owner-rsgb_= lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens Paul= A. Cianciolo [paulc@snet.net]
Verzonden: zaterdag 17 april 2010 15:53
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: RE: LF: Dreamers Band update from W1VLF

Markus
 
Valued commentary as always. Plans are to continue making improvements in= the station. 
 
What are your feeling about the ground at 9 KHz?
 
Currently I am using 3   2 meter ground rods spaced 2 meters ap= art  and 1 meter distant from the concrete basement wall of my= shack.
 
This setup is not optimum I understand and was never intended to be final= ground system for my regular ham station.
 
As a very quick and crude test I pounded an aluminum pole into the earth= 2 meters deep near the 9 KHz coil.
When this was connected to the existing ground there was a very small inc= rease in the current meter.
 
Antenna system impedance here is about 1250 Ohms  with and antenna= current of approx. 200 ma.
Lots of work to do!!!
 
I will make another post on grounds to the group as well.
 
Thank you
 
PauLC
W1VLF
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 -----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_grou= p@blacksheep.org]On Behalf Of Markus Vester
Sent: Friday, April 16, 2010 4:29 PM
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Dreamers Band update from W1VLF

Dear Paul and Jay,
 
this is an excellent result, well don= e!
 
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, yo= ur signal will be detectable very significantly beyond that. Ass= uming otherwise equal receive conditions, QRSS-120 should get you more than 6= times further than QRSS-3.
 
Best wishes,
Markus (DF6NM)
 
----- Original Message -----
Sent: Friday, April 16, 2010 8:05= PM
Subject: Re: LF: Dreamers Band upda= te from W1VLF

Paul,

      Great work! Nice looking coil!  How mu= ch 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.

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


 at 1:51 PM, Paul A. Cianciolo <= paulc@snet.net> wrote:
> Hello Folks,
>
> Today we made our first outdoor transmission on VLF.
>
> The system resonance forced the transmissions to take place on 8890= 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
>
--_000_BF4A524700075746A6467658DFC7102C19A2156E3EICTSSEXC2CAlu_--