Return-Path: Received: from mtain-ma02.r1000.mx.aol.com (mtain-ma02.r1000.mx.aol.com [172.29.96.10]) by air-da05.mail.aol.com (v128.1) with ESMTP id MAILINDA051-85e74bb6362c33; Fri, 02 Apr 2010 14:23:41 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-ma02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 934B138000090; Fri, 2 Apr 2010 14:23:38 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NxlVq-0003m0-C6 for rs_out_1@blacksheep.org; Fri, 02 Apr 2010 19:22:34 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NxlVp-0003lr-Lm for rsgb_lf_group@blacksheep.org; Fri, 02 Apr 2010 19:22:33 +0100 Received: from mail-wy0-f171.google.com ([74.125.82.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NxlVm-0006uQ-P9 for rsgb_lf_group@blacksheep.org; Fri, 02 Apr 2010 19:22:33 +0100 Received: by wyf28 with SMTP id 28so682390wyf.16 for ; Fri, 02 Apr 2010 11:22:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:received:message-id:subject :from:to:content-type; bh=dSvuoyTeyAqtUfnmy6fRnR/GseWM6thUZ9PmWIaK2Ls=; b=r1t9jIYCtX+vU63Gj8kRckKz22iHVf4Q/XJ/nfC6ZHrQS3SJmMk4qtgtZYIvYkz6G0 OWKnbHoyqVwFibsIlaBa9xSA8rjUm398EbvWAw0gFYiql0NyJwj1tvQzCsPXfglk4Og3 FNQNDmzCLx62ih2noaZdBUH5eoJg8lBGM3Nug= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=dD6eyWuK/VYN4OBEIAG7KfIQRXtF4/E47eWk6v84bqvwva+K8zUmtC/WuIRnoaw+Fk f8UeQ00Os2YMnT6Rrr5h4u7XXHEiSkvgxo7FkpFJiyEsGzSlmT0/JQ5/Pg3u5a7R/I6J 9gtU1mKCOL7Iy8XQ4uDNUj5YqlAY3w/biiWWE= MIME-Version: 1.0 Received: by 10.216.163.144 with HTTP; Fri, 2 Apr 2010 11:22:22 -0700 (PDT) In-Reply-To: <8585FA1C733D9A42AEA98C724D8FB811C05392@FBCMST18V01.fbc.local> References: <001d01cad190$aa92e590$0901a8c0@lark> <841031C22EC944FEB2BB3E1DC237717E@acer3f31164f8b> <38A51B74B884D74083D7950AD0DD85E82A1BBF@File-Server-HST.hst.e-technik.tu-darmstadt.de> <38A51B74B884D74083D7950AD0DD85E82A1BC2@File-Server-HST.hst.e-technik.tu-darmstadt.de> <8585FA1C733D9A42AEA98C724D8FB811C05392@FBCMST18V01.fbc.local> Date: Fri, 2 Apr 2010 19:22:22 +0100 X-Google-Sender-Auth: e9eb3e5002940524 Received: by 10.216.89.84 with SMTP id b62mr1481166wef.226.1270232542553; Fri, 02 Apr 2010 11:22:22 -0700 (PDT) Message-ID: From: Gary - G4WGT To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: VLF: 4th VLF experiment by DK7FC/p Content-Type: multipart/alternative; boundary=0016e6d971027b2e0c0483450f05 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=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-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d240.1 ; domain : googlemail.com DKIM : fail x-aol-sid: 3039ac1d600a4bb6362a0757 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --0016e6d971027b2e0c0483450f05 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Daniele, If you look at Marcus's 9kHz grabber & go to the bottom of the page you ca= n download the configurations from there, three were available when I last looked. http://www.mydarc.de/df6nm/vlf/vlfgrabber.htm 73, Gary - G4WGT. On 2 April 2010 17:09, wrote: > Interested in the SpecLab configuration file :-) > Could it be made available via web link or e-mail? > Many thanks > Daniele > > ________________________________ > > Da: owner-rsgb_lf_group@blacksheep.org per conto di Stefan Sch=E4fer > Inviato: ven 02/04/2010 13.09 > A: rsgb_lf_group@blacksheep.org > Oggetto: AW: VLF: 4th VLF experiment by DK7FC/p > > > Hi Gary, VLF, LF, > > The locator is JN49IS. In older mails i have given you the exact > coordinates. In google maps you can find the QTH within a sector of some > 10m. > > QRG is 8,97000 kHz. The 4mHz settings is optimal! If the SNR will be goo= d, > you can try 8mHz as well or 15, like Markus did it at the end of the tes= ts. > 15mHz seems to be optimal for DFCW-120 but i will start with DFCW-600... > > I will have no internet access until saturday night, so cu after the > experiment. > Hopefully the wind will be strong enough, the forecast shows about 20km/= h > from south. This would be enough... > > Best 73 es gd RX! :-) > > Stefan/DK7FC > > ________________________________ > > Von: owner-rsgb_lf_group@blacksheep.org im Auftrag von Gary - G4WGT > Gesendet: Fr 02.04.2010 11:52 > An: rsgb_lf_group@blacksheep.org > Betreff: Re: VLF: 4th VLF experiment by DK7FC/p > > > Hi Stefan, LF, > > I will be monitoring your frequency using a M0BMU type 30 turn 0.8M squa= re > loop and 9kHz pre-amp into my PC sound card, software is SpecLab running > Marcus's "9kHz_4mHz" configuration. This loop system has increased my > reception of the Alpha signals by about 10db giving up to 25db SNR. Than= ks > to Jim for a great design. > > Stefan, can you tell me the QTH locator for your Tx site please. > > Good luck with the 4th test. > > 73 > > Gary - G4WGT. > > > 2010/4/2 Stefan Sch=E4fer > > > Dear group, > > After a break of one week i plan to transmit again on VLF / 8,97 > kHz. If the wind will be enough i will come up on saturday, 3. April, at > arround 10 UTC. > > The DFCW-600 mode was a good choice in the last experiment, so i > will keep this mode. > > If Markus/DF6NM has time to make QSP on the mobile phone to the > reflector (Markus ?) we could arrange various tests. I will also call ot= her > local stations for reception reports during the transmission. > > There will be some new components to test: > > Today i started building up the 600W class D PA (at least 600W)= that > is directly fed out of the 230V (rectified) of the generator. PTT and VF= O > input is realised by fiber optic cables. The DC capacitor is 2000=B5F/35= 0V and > can be put on voltage without a NTC or charging resistor due to the > relatively high output impedance of the small generator (tested). This= works > very fine now. Tomorrow i will apply the FETs and the big ferrite core= and > it's windings. Then i will do a test on a dummy load at home. If the sig= nal > will be 3dB stronger, we could theoretically change to DFCW-300 compared= to > the last experiment. But there are many OMs writing private mails to me= and > prepare to be QRV on this next test. Some of them are using E-Field ante= nnas > and/or are more than 860km away, that' why i want to stay in QRSS-600 fi= rst. > So there might come a new distance record? In any case it will be exciti= ng > to me watching the new system running :-) Also it will be interesting to= see > if the E-field antenna will get the signal! > > The primary winding of the TX coil is increased from 9 to 13 turn= s > due to the higher power that will be applied. Otherwise the current will > become to high. > > I will mount the amperemeter (analog, 1A) into the coil. That mak= es > it easier to adjust to resonance and watch the stability and maximum and > average (estimation) current. > > Finally i will try to apply some copper rods into the earth and= will > look how the antenna current is changing. > > The goal is to radiate 4mW ERP. Another goal is to reach as many > stations as possible. So i would be pleased if YOU would be one of them.= :-) > > Since the QRM/QRN comes up in the late afternoon and transmitting > for 4...5 hours i will close at about 15 UTC. So the planned LF activity= is > not affected :-). Sorry, but i cannot participate on the LF acty later= since > the VLF coil takes all the place in my car ;-) > > I looking forward to this experiment and wish you good luck and= fun > by receiving :-) > > 73 es gl, Stefan/DK7FC > > PS: Could you give me a short feedback if you plan to be RX? > > > > > > > --0016e6d971027b2e0c0483450f05 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Daniele,

If you look at Marcus's 9kHz grabber &a= mp; go to the bottom of the page you can download the configurations from= there, three were available when I last looked.


73,

Gary - G4WGT.


On 2 April 2010 17:09, <daniele.tincani@alice.it> wrote:
Interested in the SpecLab configuration= file :-)
Could it be made available via web link or e-mail?
Many thanks
Daniele

________________________________

Da: owner-rsgb_lf_gr= oup@blacksheep.org per conto di Stefan Sch=E4fer
Inviato: ven 02/04/2010 13.09
A: rsgb_lf_group@blackshee= p.org
Oggetto: AW: VLF: 4th VLF experiment by DK7FC/p


Hi Gary, VLF, LF,

The locator is JN49IS. In older mails i have given you the exact coordinat= es. In google maps you can find the QTH within a sector of some 10m.

QRG is 8,97000 kHz. The 4mHz settings is optimal! If the SNR will be good,= you can try 8mHz as well or 15, like Markus did it at the end of the test= s. 15mHz seems to be optimal for DFCW-120 but i will start with DFCW-600..= .

I will have no internet access until saturday night, so cu after the exper= iment.
Hopefully the wind will be strong enough, the forecast shows about 20km/h= from south. This would be enough...

Best 73 es gd RX! :-)

Stefan/DK7FC

________________________________

Von: owner-rsgb_lf_g= roup@blacksheep.org im Auftrag von Gary - G4WGT
Gesendet: Fr 02.04.2010 11:52
An: rsgb_lf_group@blackshe= ep.org
Betreff: Re: VLF: 4th VLF experiment by DK7FC/p


Hi Stefan, LF,

I will be monitoring your frequency using a M0BMU type 30 turn 0.8M square= loop and 9kHz pre-amp into my PC sound card, software is SpecLab running= Marcus's "9kHz_4mHz" configuration. This loop system has in= creased my reception of the Alpha signals by about 10db giving up to 25db= SNR. Thanks to Jim for a great design.

Stefan, can you tell me the QTH locator for your Tx site please.

Good luck with the 4th test.

73

Gary - G4WGT.


2010/4/2 Stefan Sch=E4fer <schaefer@hst.tu-darmstadt.de>


=A0 =A0 =A0 =A0Dear group,

=A0 =A0 =A0 =A0After a break of one week i plan to transmit again on VLF= / 8,97 kHz. If the wind will be enough i will come up on saturday, 3. Apr= il, at arround 10 UTC.

=A0 =A0 =A0 =A0The DFCW-600 mode was a good choice in the last experiment= , so i will keep this mode.

=A0 =A0 =A0 =A0If Markus/DF6NM has time to make QSP on the mobile phone= to the reflector (Markus ?) we could arrange various tests. I will also= call other local stations for reception reports during the transmission.<= br>
=A0 =A0 =A0 =A0There will be some new components to test:

=A0 =A0 =A0 =A0Today i started building up the 600W class D PA (at least= 600W) that is directly fed out of the 230V (rectified) of the generator.= PTT and VFO input is realised by fiber optic cables. The DC capacitor is= 2000=B5F/350V and can be put on voltage without a NTC or charging resisto= r due to the relatively high output impedance of the small generator (test= ed). This works very fine now. Tomorrow i will apply the FETs and the big= ferrite core and it's windings. Then i will do a test on a dummy load= at home. If the signal will be 3dB stronger, we could theoretically chang= e to DFCW-300 compared to the last experiment. But there are many OMs writ= ing private mails to me and prepare to be QRV on this next test. Some of= them are using E-Field antennas and/or are more than 860km away, that'= ; why i want to stay in QRSS-600 first. So there might come a new distance= record? In any case it will be exciting to me watching the new system run= ning :-) Also it will be interesting to see if the E-field antenna will ge= t the signal!

=A0 =A0 =A0 =A0The primary winding of the TX coil is increased from 9 to= 13 turns due to the higher power that will be applied. Otherwise the curr= ent will become to high.

=A0 =A0 =A0 =A0I will mount the amperemeter (analog, 1A) into the coil.= That makes it easier to adjust to resonance and watch the stability and= maximum and average (estimation) current.

=A0 =A0 =A0 =A0Finally i will try to apply some copper rods into the eart= h and will look how the antenna current is changing.

=A0 =A0 =A0 =A0The goal is to radiate 4mW ERP. Another goal is to reach= as many stations as possible. So i would be pleased if YOU would be one= of them. :-)

=A0 =A0 =A0 =A0Since the QRM/QRN comes up in the late afternoon and trans= mitting for 4...5 hours i will close at about 15 UTC. So the planned LF ac= tivity is not affected :-). Sorry, but i cannot participate on the LF acty= later since the VLF coil takes all the place in my car ;-)

=A0 =A0 =A0 =A0I looking forward to this experiment and wish you good luc= k and fun by receiving =A0:-)

=A0 =A0 =A0 =A073 es gl, Stefan/DK7FC

=A0 =A0 =A0 =A0PS: Could you give me a short feedback if you plan to be= RX?







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