Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-db03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 68CF7380000B9; Tue, 15 Nov 2011 16:46:39 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RQQpE-0007DS-TA for rs_out_1@blacksheep.org; Tue, 15 Nov 2011 21:45:52 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RQQpE-0007DJ-Bh for rsgb_lf_group@blacksheep.org; Tue, 15 Nov 2011 21:45:52 +0000 Received: from mail-bw0-f43.google.com ([209.85.214.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RQQpB-0002ZP-Q1 for rsgb_lf_group@blacksheep.org; Tue, 15 Nov 2011 21:45:52 +0000 Received: by bkbzt12 with SMTP id zt12so13548867bkb.16 for ; Tue, 15 Nov 2011 13:45:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=DCD6R6edjfL6AGtkANmX1ETg3vEtbjlMNuaDgMLTNG4=; b=R5IP0Vyl8Oqs6oNy+o34NDxEDCKSalJmA44GkqcR29NHu46ZTg2KQ8gkVpaU92v5xD M9OiA2ukfVFGrqA/Qn+pvgL6a+COz8/PTvdJGvgg31PJHg396W31WQ3bEgcmm5fQIaWo CRZUIYrIa4kmFuh2qOAEWcmkVSj/nVyWE1sSE= MIME-Version: 1.0 Received: by 10.204.130.140 with SMTP id t12mr8032672bks.136.1321393543613; Tue, 15 Nov 2011 13:45:43 -0800 (PST) Received: by 10.204.66.204 with HTTP; Tue, 15 Nov 2011 13:45:43 -0800 (PST) In-Reply-To: <4EC2C6EB.2080201@iup.uni-heidelberg.de> References: <66E491BAB91C48AF81191F4022525A14@DennisPC> <6FE757960E6C447781689D4F19A315AE@DennisPC> <4EC2C6EB.2080201@iup.uni-heidelberg.de> Date: Wed, 16 Nov 2011 08:45:43 +1100 Message-ID: From: Dimitrios Tsifakis To: rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: VLF: 8970 Hz transmissions, soon again here Content-Type: multipart/alternative; boundary=0015173ff110c68f8204b1cce89d 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-SCORE: 0:2:501256768:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d009.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d40574ec2ddbf4628 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --0015173ff110c68f8204b1cce89d Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I too will be more than happy to set up my less than optimal setup on 8.9 kc. Just let me know, preferably a day or two in advance! Regarding the question ID vs carrier, I don't have a problem with either! 73, Dimitris VK1SV PS It doesn't hurt dreaming :-) 2011/11/16 Stefan Sch=E4fer > ** > VLF, > > Am 15.11.2011 17:03, schrieb DENNIS EASTERLING: > > [...] I also have a mini-whip, but this has been extended for > VLF purposes. [...] > > > ...which is good since soon there will be some activity again on 8970 Hz. > If you like you can join in to the group of successful listeners on the 3= 3 > km band. > > Yesterday i carried my TX coil to the fixed antenna here. Also the PA and > variometer part of course. I do inted to use the fixed antenna. > I did some calculations about the radiation resistance and losses and > power at maximum voltage (50 kV rms on the wire) and found that the ERP > will be about 10 dB higher than expected, i.e. i could radiate something = in > the range of many 100 uW up to 1 mW or theoretically up to 2 mW. We will > see and measure. > > Paul Nicholsen reported about a very senistive receiver in USA that allow= s > long time integration, i.e. not producing a spectrogram but integrating a > given TX time into a single bin, like Paul usually does. > Here on the fixed antenna i could do night transmissions. 500W TX power > key down for 24h is no problem (as long as there is no rain). > > So i am optimistic and looking forward to some new work on the dreamers > band! > > Also i would be interested if there is (still) some interest in VLF in > this group. For Paul, a endless straight "carrier" would be the optimium > while a radio amateur may like to have some true ID and maybe a message t= o > be read and displayed. What about the grabber runners and new prepared VL= F > receiving stations? > > Probably i will start next week but may do some spontaneous tests before.= .. > > 73, Stefan/DK7FC > > PS: I would like to see other VLF transmitting stations as well. What > about G3XIZ, DF6NM, OE3GHB, OE5ODL, OK2BVG, DJ8WX? We all could leave som= e > common traces again in the excellent dark spectrogram backgrounds! > > > --0015173ff110c68f8204b1cce89d Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I too will be more than happy to set up my less than optimal setup on 8.9 k= c.=A0

Just let me know, preferably a day or two in advan= ce!=A0

Regarding the question ID vs carrier, I don= 't have a problem with either!

73, Dimitris VK1SV


<= div>PS It doesn't hurt dreaming :-)


2011/11/16 Stefan Sch=E4fer <Stefan.Schaefer@iup.uni-heidelber= g.de>
=20
VLF,

Am 15.11.2011 17:03, schrieb DENNIS EASTERLING:
=20 =20 =20 =20 =20
[...] I also have a mini-whip, but this has been extended for
VLF purposes. [...]

...which is good since soon there will be some activity again on 8970 Hz. If you like you can join in to the group of successful listeners on the 33 km band.

Yesterday i carried my TX coil to the fixed antenna here. Also the PA and variometer part of course. I do inted to use the fixed antenna.
I did some calculations about the radiation resistance and losses and power at maximum voltage (50 kV rms on the wire) and found that the ERP will be about 10 dB higher than expected, i.e. i could radiate something in the range of many 100 uW up to 1 mW or theoretically up to 2 mW. We will see and measure.

Paul Nicholsen reported about a very senistive receiver in USA that allows long time integration, i.e. not producing a spectrogram but integrating a given TX time into a single bin, like Paul usually does.
Here on the fixed antenna i could do night transmissions. 500W TX power key down for 24h is no problem (as long as there is no rain).

So i am optimistic and looking forward to some new work on the dreamers band!

Also i would be interested if there is (still) some interest in VLF in this group. For Paul, a endless straight "carrier" would be the optimium while a radio amateur may like to have some true ID and maybe a message to be read and displayed. What about the grabber runners and new prepared VLF receiving stations?

Probably i will start next week but may do some spontaneous tests before...

73, Stefan/DK7FC

PS: I would like to see other VLF transmitting stations as well. What about G3XIZ, DF6NM, OE3GHB, OE5ODL, OK2BVG, DJ8WX? We all could leave some common traces again in the excellent dark spectrogram backgrounds!



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