Return-Path: Received: from mtain-mh04.r1000.mx.aol.com (mtain-mh04.r1000.mx.aol.com [172.29.96.216]) by air-ma01.mail.aol.com (v129.10) with ESMTP id MAILINMA014-b4f24dc2f7be165; Thu, 05 May 2011 15:17:18 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mh04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 37FF83800030A; Thu, 5 May 2011 15:17:09 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QI41Z-00068r-SX for rs_out_1@blacksheep.org; Thu, 05 May 2011 20:15:45 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QI41Z-00068i-AN for rsgb_lf_group@blacksheep.org; Thu, 05 May 2011 20:15:45 +0100 Received: from mail-iw0-f171.google.com ([209.85.214.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QI41W-0000Uf-Eo for rsgb_lf_group@blacksheep.org; Thu, 05 May 2011 20:15:45 +0100 Received: by iwn8 with SMTP id 8so3226197iwn.16 for ; Thu, 05 May 2011 12:15:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=YoRzGSyDQuebCM7ITlQfpnX9ANKr+8nY+FagYoK2ROU=; b=IofWLwkNxpzxZcn9yl5VCkI5S9vXhKyWTxm4SEn/E2Qgx9qW8XjpsItqQOPxmJil7/ FkTrpTCxPIybh8pAaWj4HSXxR9p6oky9xKx7Yti/YTWh6m/Qg4I+1gsD9VCpcvr+xJqX xV8/XOQagA+cBkh8N3sfLh0f5pM2Q37QwAwAk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=Cfodug80d08UEpi3FiGL6LS0Qo1pe6tIuutC4KqqJvjamILbgtY+ycTiHZqZhbWJmA XPIZyRdEy1a6r6xAkFLBGmzdVrcqynFwm545YgytG5S/2MVrFlr7nz7t/0dmBQK9q+9H HhixH707fkL+uyO7LT7LQprCCNlXig599x/FM= MIME-Version: 1.0 Received: by 10.42.135.202 with SMTP id q10mr1358042ict.381.1304622936227; Thu, 05 May 2011 12:15:36 -0700 (PDT) Received: by 10.42.221.133 with HTTP; Thu, 5 May 2011 12:15:36 -0700 (PDT) In-Reply-To: <4DC2F535.3080907@iup.uni-heidelberg.de> References: <4DC28736.5070405@talktalk.net> <8CDD93ACCC1EFE6-153C-39E0A@Webmail-d111.sysops.aol.com> <4DC2A264.5050606@talktalk.net> <822009.51309.qm@web111905.mail.gq1.yahoo.com> <4DC2A9C5.2050209@talktalk.net> <4DC2CAAD.70705@iup.uni-heidelberg.de> <8CDD95AD5252832-131C-136A6@webmail-d042.sysops.aol.com> <4DC2EACD.5090309@iup.uni-heidelberg.de> <4DC2F535.3080907@iup.uni-heidelberg.de> Date: Thu, 5 May 2011 20:15:36 +0100 Message-ID: From: Roger Lapthorn 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: ELF: Zevs Content-Type: multipart/alternative; boundary=90e6ba6e8960ae011704a28c3280 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30, HTML_FONTCOLOR_UNKNOWN,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-m023.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d60d84dc2f7b50559 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --90e6ba6e8960ae011704a28c3280 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Stefan It is always good to have too many ideas and projects. It shows you have plenty of enthusiasm and drive! 73s Roger G3XBM 2011/5/5 Stefan Sch=E4fer > Hmm, well.... I've done some tests on 1970 Hz and haven't come very far= . > Just a poor signal in 5 km distance. But the QRM is very high there. I= think > in your utilities assisted earth mode i will work some km. Would be > interesting about a QRO test ;-) I could use my LF TX antenna and ground= it > at the far end, i would achieve a loop with 2700 m^2 but even that would= n't > be enough to reach the next amateur station i think. > To many projects in the moment, like building up the LF stn and improvin= g > the RX and so on. But maybe i'll go back to 1970 Hz if i can do some bet= ter > local tests on the earth antenna... > > 73, Stefan > > PS: Sounds like i become old? No! ;-) > > Am 05.05.2011 20:29, schrieb Roger Lapthorn: > > If you use your earth electrode antenna Stefan you will not need the coi= l. > Try it and see how far it gets at this much lower frequency? > > 73s > Roger G3XBM > > 2011/5/5 Stefan Sch=E4fer > >> Markus, >> >> If you wind the coil, i'll try it! >> >> Ah, BTW, a simple mains transformer would do the job! Driven by the H >> bridge and SL as the driver. Trivial ;-) >> >> 73, Stefan >> >> Am 05.05.2011 18:44, schrieb Markus Vester: >> >> >> Hi Stefan, >> >> that window looks like a challenge for your transmit earth antenna as= well >> ;-) >> Best 73, >> Markus >> >> -----Urspr=FCngliche Mitteilung----- >> Von: Stefan Sch=E4fer >> An: rsgb_lf_group@blacksheep.org >> Verschickt: Do., 5. Mai. 2011, 18:05 >> Thema: Re: ELF: Zevs >> >> Hi Eddie, Daniele, ELF ;-) >> >> My temporarely window is running here >> http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html >> Curious if i'll get a trace tomorrow morning... >> >> 73, Stefan >> >> >> > > > -- > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > https://sites.google.com/site/sub9khz/ > > --=20 http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm https://sites.google.com/site/sub9khz/ --90e6ba6e8960ae011704a28c3280 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Stefan

It is always good to have too many ideas and projects. It sh= ows you have plenty of enthusiasm and drive!

73s
Roger G3XBM
=
2011/5/5 Stefan Sch=E4fer <schaefer@iup.uni-he= idelberg.de>
=20
Hmm, well.... I've done some tests on 1970 Hz and haven't come ver= y far. Just a poor signal in 5 km distance. But the QRM is very high there. I think in your utilities assisted earth mode i will work some km. Would be interesting about a QRO test ;-) I could use my LF TX antenna and ground it at the far end, i would achieve a loop with 2700 m^2 but even that wouldn't be enough to reach the next amateur station i think.
To many projects in the moment, like building up the LF stn and improving the RX and so on. But maybe i'll go back to 1970 Hz if i can do some better local tests on the earth antenna...

73, Stefan

PS: Sounds like i become old? No! ;-)

Am 05.05.2011 20:29, schrieb Roger Lapthorn:
If you use you= r earth electrode antenna Stefan you will not need the coil. Try it and see how far it gets at this much lower frequency?

73s
Roger G3XBM

2011/5/5 Stefan Sch=E4fer &= lt;sch= aefer@iup.uni-heidelberg.de>
Markus,

If you wind the coil, i'll try it!

Ah, BTW, a simple mains transformer would do the job! Driven by the H bridge and SL as the driver. Trivial ;-)

73, Stefan

Am 05.05.2011 18:44, schrieb Markus Vester:

Hi Stefan,
=A0
that window looks like a challenge for your transmit earth antenna as well ;-)
Best 73,
Markus

-----Urspr=FCngliche Mitteilung-----
Von: Stefan Sch=E4fer <Stefan.Schaefer@iup.uni-heidelberg.de> An: rsgb= _lf_group@blacksheep.org
Verschickt: Do., 5. Mai. 2011, 18:05
Thema: Re: ELF: Zevs

Hi Eddie, Daniele, ELF ;-)

My temporarely window is running here http://www= .iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
Curious if i'll get a trace tomorrow morning...

73, Stefan
=A0



--
http://g3xb= m-qrp.blogspot.com/
http://www.g3xbm.co= .uk
http://w= ww.youtube.com/user/g3xbm
htt= ps://sites.google.com/site/sub9khz/




--
http://g3xbm-qrp.blogspot.com/<= br>http://www.g3xbm.c= o.uk
http://www= .youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/
--90e6ba6e8960ae011704a28c3280--