Return-Path: Received: from mtain-df07.r1000.mx.aol.com (mtain-df07.r1000.mx.aol.com [172.29.64.219]) by air-dc04.mail.aol.com (v129.4) with ESMTP id MAILINDC044-86a24d4d4215344; Sat, 05 Feb 2011 07:27:01 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df07.r1000.mx.aol.com (Internet Inbound) with ESMTP id BA19A380000EE; Sat, 5 Feb 2011 07:26:59 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PlhD7-0000he-I1 for rs_out_1@blacksheep.org; Sat, 05 Feb 2011 12:25:53 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PlhD6-0000hV-Pr for rsgb_lf_group@blacksheep.org; Sat, 05 Feb 2011 12:25:52 +0000 Received: from imr-mb02.mx.aol.com ([64.12.207.163]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PlhD4-00084T-2r for rsgb_lf_group@blacksheep.org; Sat, 05 Feb 2011 12:25:52 +0000 Received: from mtaout-db05.r1000.mx.aol.com (mtaout-db05.r1000.mx.aol.com [172.29.51.197]) by imr-mb02.mx.aol.com (8.14.1/8.14.1) with ESMTP id p15CPjY4025503 for ; Sat, 5 Feb 2011 07:25:45 -0500 Received: from White (nrbg-4dbe5a47.pool.mediaWays.net [77.190.90.71]) by mtaout-db05.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 966EAE0000A3 for ; Sat, 5 Feb 2011 07:25:42 -0500 (EST) Message-ID: <68C776F425764B2298E75EFE43DE5C31@White> From: "Markus Vester" To: References: <4D4C7006.1020904@freenet.de> Date: Sat, 5 Feb 2011 13:25:45 +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-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: VLF: New transmitter on 26 kHz in Israel ? Content-Type: multipart/alternative; boundary="----=_NextPart_000_0006_01CBC538.320AA530" 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_UNSAFE,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: 3039ac1d40db4d4d42134799 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none ------=_NextPart_000_0006_01CBC538.320AA530 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ...very interesting thread! Peter's plots for Feb 3rd give daytime levels of +23 dB for 26 kHz and= +17.2 dB for 26.7. His distance to Bafa is 2288 km. Assuming 1/r prop= agation (certainly only a very rough guess), and a TX location in Nort= hern Israel, 26 kHz should have about 8.5 dB more EMRP than Bafa. Chris' 10 UT spectrogram has 26 kHz at -110 dB and 26.7 at -81 dB. Hai= fa is 863 km from Bafa, which would then place the unid site 81 km fro= m him. A similar estimate using Paul's earlier figure of 15 dB difference wou= ld result in 17 dB ERP difference, and about 220 km from Haifa. The North of Israel is a narrow and densely populated country, so it= may be difficult to erect a large VLF installation. There is however= a large coal plant on the seashore near Hadera at=20 32.469 N 34.886 E (39 km south of Haifa), which has three very prominent chimneys on a baseline length of 460 m.= This is just speculation, but it might be feasible to run a wire ante= nna between the tops of the chimneys, and do without a radial system= by directly connecting to seawater. Chris, how about taking along loop and notebook for your next scenic= drive ;-) Best regards, Markus (DF6NM) From: Chris Gomoiu=20 Sent: Saturday, February 05, 2011 9:21 AM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: VLF: New transmitter on 26 kHz in Israel ? Hello Wolf, VLF, I've been running my VLF grabber for a while at 92kc/s and I can confi= rm the 26kHz transmission was the strongest signal ever received here= http://dl.dropbox.com/u/10280270/capt_DFCW-600_wide189.jpg I have only a small E-field probe antenna optimized for the 9kHz dream= er's band so can't contribute any DF information than already availabl= e in the thread you've mentioned. Now back to 48kc/s sample rate for= tomorrow DK7FC VLF experiment. 73s Chris 4X1RF =20 On Fri, Feb 4, 2011 at 11:30 PM, wolf_dl4yhf wrote= : Greetings all, There seems to be a new transmitter being set up at the moment. It= only operates occasionally, but quite strong here when it's "on". Som= e speculation in the VLF group about the exact location: http://tech.groups.yahoo.com/group/VLF_Group/message/16955?l=3D1 Since we have at least one keen VLF experimenter from that area in= this group... if you have a loop antenna, can we have a bearing towar= ds that "unknown" transmitter ? Cheers, Wolf DL4YHF . ------=_NextPart_000_0006_01CBC538.320AA530 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
...very interesting thread!
 
Peter's plots for Feb 3rd give daytim= e levels of=20 +23 dB for 26 kHz and +17.2 dB for 26.7. His distance to Bafa is 2288= km.=20 Assuming 1/r propagation (certainly only a very rough guess), and a TX= location=20 in Northern Israel, 26 kHz should have about 8.5 dB more EMRP than=20 Bafa.
 
Chris' 10 UT spectrogram has 26 kHz= at -110 dB and=20 26.7 at -81 dB. Haifa is 863 km from Bafa, which would then place the= unid site=20 81 km from him.
 
A similar estimate using Paul's earli= er figure of=20 15 dB difference would result in 17 dB ERP difference, and about 220= km from=20 Haifa.
 
The North of Israel is a narrow and= densely=20 populated country, so it may be difficult to erect a large VLF install= ation.=20 There is however a large coal plant on the seashore near Hadera at 32.469 N=20 34.886 E (39 km south of Haifa),
which has three very prominent chi= mneys on a=20 baseline length of 460 m. This is just speculation, but it might be fe= asible to=20 run a wire antenna between the tops of the chimneys, and do without a= radial=20 system by directly connecting to seawater.
 
Chris, how about taking along loop an= d notebook for=20 your next scenic drive ;-)
 
Best regards,
Markus (DF6NM)

Sent: Saturday, February 05, 2011 9:21 AM
Subject: Re: VLF: New transmitter on 26 kHz in Israel=20 ?

Hello Wolf, VLF,
 
I've been running my VLF grabber for a while at 92kc/s and I can= confirm=20 the 26kHz transmission was the strongest signal ever received here http://dl.dropbox.com= /u/10280270/capt_DFCW-600_wide189.jpg
 
I have only a small E-field probe antenna optimized for the 9kHz= dreamer's=20 band so can't contribute any DF information than already available in= the thread=20 you've mentioned. Now back to 48kc/s sample rate for tomorrow DK7FC VL= F=20 experiment.
 
73s
Chris 4X1RF


 
On Fri, Feb 4, 2011 at 11:30 PM, wolf_dl4yhf= <dl4yhf@fre= enet.de>=20 wrote:
Greetings=20 all,
There seems to be a new transmitter being set up at the mome= nt. It=20 only operates occasionally, but quite strong here when it's "on". So= me=20 speculation in the VLF group about the exact location:

http://tech.groups.yahoo.com/group/VLF_Grou= p/message/16955?l=3D1

Since=20 we have at least one keen VLF experimenter from that area in this gr= oup... if=20 you have a loop antenna, can we have a bearing towards that "unknown= "=20 transmitter ?

Cheers,
 Wolf DL4= YHF=20 .



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