Return-Path: Received: from mtain-mk02.r1000.mx.aol.com (mtain-mk02.r1000.mx.aol.com [172.29.97.134]) by air-me09.mail.aol.com (v129.10) with ESMTP id MAILINME094-8bc34dc30bac2c2; Thu, 05 May 2011 16:42:21 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mk02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 81CA73800010B; Thu, 5 May 2011 16:42:16 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QI5Lw-0006qA-SL for rs_out_1@blacksheep.org; Thu, 05 May 2011 21:40:52 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QI5Lw-0006q1-8L for rsgb_lf_group@blacksheep.org; Thu, 05 May 2011 21:40:52 +0100 Received: from imr-da04.mx.aol.com ([205.188.105.146]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QI5Lt-00020P-Jh for rsgb_lf_group@blacksheep.org; Thu, 05 May 2011 21:40:52 +0100 Received: from mtaout-mb04.r1000.mx.aol.com (mtaout-mb04.r1000.mx.aol.com [172.29.41.68]) by imr-da04.mx.aol.com (8.14.1/8.14.1) with ESMTP id p45KeTA0024188 for ; Thu, 5 May 2011 16:40:29 -0400 Received: from White (nrbg-4dbe4596.pool.mediaWays.net [77.190.69.150]) by mtaout-mb04.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id BAB1EE0000C9 for ; Thu, 5 May 2011 16:40:21 -0400 (EDT) Message-ID: From: "Markus Vester" To: 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 22:40:24 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: ELF: Zevs Content-Type: multipart/alternative; boundary="----=_NextPart_000_0065_01CC0B75.6C3789C0" 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=HTML_30_40, HTML_FONTCOLOR_UNKNOWN,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: 3039ac1d61864dc30ba72959 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_0065_01CC0B75.6C3789C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Stefan, I guess you could just connect the 230V terminals of your gene= rator to the earth electrodes, and throttle up the carburettor a bit.= .. Best 73, Markus From: Stefan Sch=E4fer=20 Sent: Thursday, May 05, 2011 9:06 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: ELF: Zevs Hmm, well.... I've done some tests on 1970 Hz and haven't come very fa= r. 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 antenn= a 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.=20 To many projects in the moment, like building up the LF stn and improv= ing the RX and so on. But maybe i'll go back to 1970 Hz if i can do so= me 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:=20 If you use your 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 Markus,=20 If you wind the coil, i'll try it! Ah, BTW, a simple mains transformer would do the job! Driven by th= e H bridge and SL as the driver. Trivial ;-) 73, Stefan Am 05.05.2011 18:44, schrieb Markus Vester:=20 Hi Stefan, that window looks like a challenge for your transmit earth anten= na as well ;-) Best 73, Markus -----Urspr=FCngliche Mitteilung-----=20 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-heidelb= erg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html Curious if i'll get a trace tomorrow morning... 73, Stefan --=20 http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm https://sites.google.com/site/sub9khz/ ------=_NextPart_000_0065_01CC0B75.6C3789C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Stefan, I guess you could just connec= t the=20 230V terminals of your generator to the earth electrodes, and thr= ottle up=20 the carburettor a  bit...
 
Best 73,
Markus

Sent: Thursday, May 05, 2011 9:06 PM
Subject: Re: ELF: Zevs

Hmm, well.... I've done some tests on 1970 Hz and haven= 't come=20 very far. Just a poor signal in 5 km distance. But the QRM is very hig= h there. I=20 think in your utilities assisted earth mode i will work some km. Would= be=20 interesting about a QRO test ;-) I could use my LF TX antenna and grou= nd it at=20 the far end, i would achieve a loop with 2700 m^2 but even that wouldn= 't be=20 enough to reach the next amateur station i think.
To many projects= in the=20 moment, like building up the LF stn and improving the RX and so on. Bu= t maybe=20 i'll go back to 1970 Hz if i can do some better local tests on the ear= th=20 antenna...

73, Stefan

PS: Sounds like i become old? No!= =20 ;-)

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

73s
Roger G3XBM

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

If you= wind the coil,=20 i'll try it!

Ah, BTW, a simple mains transformer would do= the job!=20 Driven by the H bridge and SL as the driver. Trivial ;-)

73= ,=20 Stefan

Am 05.05.2011 18:44, schrieb Markus Vester:=20

Hi Stefan,
 
that window looks like a challenge for your transmit earth= antenna as=20 well ;-)
Best 73,
Markus

-----Urspr=FCngliche=20 Mitteilung-----
Von: Stefan Sch=E4fer <Stefan.Schaefer@iup.uni-heidelberg.de>
An:=20 rsgb_lf_group@blacksheep.org
= Verschickt:=20 Do., 5. Mai. 2011, 18:05
Thema: Re: ELF: Zevs

Hi Eddie, Daniele, ELF ;-)

My temporarely window is= running=20 here http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_= VLF_Grabber2.html
Curious=20 if i'll get a trace tomorrow morning...

73, Stefan
 



--
h= ttp://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co= .uk
http://www.youtube.com/user/g3xbm<= /A>
https://sites.google.com/site/s= ub9khz/

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