Return-Path: X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id tBKMPLJg020879 for ; Sun, 20 Dec 2015 23:25:21 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aAmMc-0001Wv-7e for rs_out_1@blacksheep.org; Sun, 20 Dec 2015 22:22:02 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aAmMb-0001Wm-UN for rsgb_lf_group@blacksheep.org; Sun, 20 Dec 2015 22:22:01 +0000 Received: from omr-m007e.mx.aol.com ([204.29.186.9]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.86) (envelope-from ) id 1aAmLX-0007FX-Tz for rsgb_lf_group@blacksheep.org; Sun, 20 Dec 2015 22:22:00 +0000 Received: from mtaout-mac01.mx.aol.com (mtaout-mac01.mx.aol.com [172.26.222.205]) by omr-m007e.mx.aol.com (Outbound Mail Relay) with ESMTP id C434F3800121 for ; Sun, 20 Dec 2015 17:20:37 -0500 (EST) Received: from White (ipbcc05f3c.dynamic.kabel-deutschland.de [188.192.95.60]) by mtaout-mac01.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id F1AFF3800008C for ; Sun, 20 Dec 2015 17:20:34 -0500 (EST) Message-ID: From: "Markus Vester" To: References: <8D30934359654D8-15C4-3DDFF4@webmail-vm170.sysops.aol.com> <0EF07ED4EE1B45BDBB86B44B855B03BF@gnat> <68629D3DB5E840F098999D75247C9777@gnat> <5677202D.8070200@abelian.org> Date: Sun, 20 Dec 2015 23:20:33 +0100 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-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1450650037; bh=JiGbF54f1PntLB6wuRaHmcaak3oAr2uabMxi2rqUs2Y=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=gljsQFzDwYHZIl2PCYMTUEMMUqvnVcsOeyYzwCpi/XOWBEqkr2GqQef7rBhCz1Plp Q+zAtubDxjBlHw0TnfauUACgprQAl0MgZuUCZ5ghodyqC8YfHNz3+Cd3dQ8rk06Ex0 HrOwLVHfKShVdjVlkAgCDfuHTaGmYvTP3krV2Qos= x-aol-sid: 3039ac1adecd567729b22176 X-AOL-IP: 188.192.95.60 X-Scan-Signature: 968492e608ae81f946d7c13a3d073eeb Subject: Re: LF: VLF in VO Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01D13B7D.066C0BB0" 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 5864 Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_0007_01D13B7D.066C0BB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yes Paul, that sounds like a very reasonable proposal. Joe's OCXO is = obviously stable enough for the task, all that's needed there is a = different frequency word for the DDS. And considering the antenna size, = doubling (or even tripling) the current may be not unrealistic, which = could cut down integraton time to an hour or less. Joe, if you go about it today, you might end up achieving VLF = transatlantic tonight, followed by LF transpacific tomorrow ;-) All the best, Markus (DF6NM) From: Paul Nicholson=20 Sent: Sunday, December 20, 2015 10:39 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: VLF in VO > About 30 watts were fed to a 5:1 XFMR and a ~0.35H > tuning coil to the 100m wire at 10m height. > The ERP was about 3uW. How about a long carrier, GPS or rubidium? It's a long shot but it's a low loss path and the time of year is good for several hours of coherent integration. I can easily see 10uW from 1000km in one hour over a path with a lot of land. West to east over water will be lower loss and four or six hours integration will make up for the lower ERP. -- Paul Nicholson -- ------=_NextPart_000_0007_01D13B7D.066C0BB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Yes Paul, that sounds like a very = reasonable=20 proposal. Joe's OCXO is obviously stable enough for the task, all = that's=20 needed there is a different frequency word for the DDS. And considering = the=20 antenna size, doubling (or even tripling) the current may be not=20 unrealistic, which could cut down integraton time to an hour or=20 less.
 
Joe, if you go about it = today, you=20 might end up achieving VLF transatlantic tonight, = followed by LF=20 transpacific tomorrow ;-)
 
All the best,
Markus (DF6NM)
 
 

Sent: Sunday, December 20, 2015 10:39 PM
Subject: Re: LF: VLF in VO


 > About 30 watts were fed to a 5:1 XFMR and = a=20 ~0.35H
 > tuning coil to the 100m wire at 10m=20 height.

 > The ERP was about 3uW.

How about a long = carrier, GPS or rubidium?  It's a long
shot but it's a low loss = path and=20 the time of year is
good for several hours of coherent = integration.

I=20 can easily see 10uW from 1000km in one hour over
a path with a lot of = land.  West to east over water
will be lower loss and four or = six hours=20 integration
will make up for the lower ERP.

--
Paul=20 Nicholson
--

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