Return-Path: Received: from mtain-dc07.r1000.mx.aol.com (mtain-dc07.r1000.mx.aol.com [172.29.64.135]) by air-me09.mail.aol.com (v129.4) with ESMTP id MAILINME094-8bc34cc9d297dd; Thu, 28 Oct 2010 15:44:23 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dc07.r1000.mx.aol.com (Internet Inbound) with ESMTP id 9A0BC3800015F; Thu, 28 Oct 2010 15:44:21 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PBYN9-0003Cc-EX for rs_out_1@blacksheep.org; Thu, 28 Oct 2010 20:42:51 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PBYN8-0003CT-QD for rsgb_lf_group@blacksheep.org; Thu, 28 Oct 2010 20:42:50 +0100 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PBYN7-0006RU-FP for rsgb_lf_group@blacksheep.org; Thu, 28 Oct 2010 20:42:50 +0100 Received: from ix.urz.uni-heidelberg.de (cyrus-portal.urz.uni-heidelberg.de [129.206.100.176]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id o9SJgvBa022621 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 28 Oct 2010 21:42:57 +0200 Received: from extmail.urz.uni-heidelberg.de (extmail.urz.uni-heidelberg.de [129.206.100.140]) by ix.urz.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id o9SJglRB026348 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 28 Oct 2010 21:42:47 +0200 Received: from [129.206.196.85] (vpn085a.rzuser.uni-heidelberg.de [129.206.196.85]) by extmail.urz.uni-heidelberg.de (8.13.4/8.13.1) with ESMTP id o9SJgKKG012858 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 28 Oct 2010 21:42:23 +0200 Message-ID: <4CC9D240.6090402@iup.uni-heidelberg.de> Date: Thu, 28 Oct 2010 21:42:56 +0200 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.11) Gecko/20100711 Thunderbird/3.0.6 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4CC87C8C.2060206@iup.uni-heidelberg.de> <000f01cb760d$d49e7d00$6d01a8c0@DELL4> <4CC9A2DB.90507@iup.uni-heidelberg.de> In-Reply-To: X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Re: TF? Content-Type: multipart/alternative; boundary="------------030708060300020604010408" 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-sid: 3039ac1d40874cc9d29523b6 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --------------030708060300020604010408 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id o9SJgvBa022621 Dear Chris, This is a very pleasing message. I am happy and proud about this. :-) Well, 2872 km is a real heavy challenge! But surely i will try to send=20 you a suitable signal (seems, i need a new generator ;-) ) and the=20 winther season may help us a little. Oh, sri, if you are new in the group (?), welcome! :-) First, most of the activity is on LF/137 kHz or MF/500 kHz, as you=20 probably know. Have you ever been RXing on 137 kHz? I think some people=20 would be very interested to be copied in Israel. Me too. I plan to be=20 QRV again on 137 with the kite antenna soon... Regarding VLF RX antennas: The PA0RDT mini whip is used by many RX stns=20 on VLF (mostly with some modifications, such as higher C and L values=20 and/or band/low pass filters) and is prooved to be well suitable. There=20 seems to be a tendency that E field antennas are performing better than=20 loop antennas in a noisy region and are mostly better than a long wire=20 antenna. I have built an E field antenna too which is running all the time on my=20 grabber=20 (http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html).=20 You can see the antenna here:=20 http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber_Antenna_lo= cation.html =20 and the circuit of the antenna is here (today updated!):=20 http://www.iup.uni-heidelberg.de/schaefer_vlf/8,97kHz%20active%20E%20field= %20antenna%20by%20DK7FC.jpg Chris, there was a lot of knowledge accumulated in the last months here=20 in the group, so if you have any questions, just ask. No problem ;-) I=20 have no ideas about SDRs here but all the experts are HERE! ;-) 73, Stefan/DK7FC PS: Good luck building the antenna! Am 28.10.2010 21:07, schrieb Chris Gomoiu: > Hello Stefan and LF group, > > I would be also interested to check for your signals or those of=20 > others. I don't have a LF antenna yet but using the 24m long LW I=20 > managed to hear PA0A on 502.4Khz WSPR. Willing to try even lower in=20 > frequency and would appreciate any info which may help. Found lots of=20 > resources on the net and I'm slowly trying to familiarize myself with=20 > the LF challenges. > > Planning to construct a PA0RDT mini-whip this weekend and see how it=20 > works in my noisy area. Found out that my ADSL modem completely wipes=20 > out the 600m band so I switch it off when listening. Using an HPSDR=20 > transceiver here GPSDO locked. No LF-VLF TX permit available here yet=20 > but I can always listen. > > 73's Chris 4X1RF > KM72LS > > > > 2010/10/28 Stefan Sch=E4fer > > > LF, > > Yesterday in the evening i've got the below message from Jay. > After that i wrote an email to TF3HZ and told about VLF, gave him > some links and asked if he would be interested to try an attempt > to receive my signal... > He has already installed SpecLab and IS interested. He will build > my active E field antenna and has ordered the BF862's this > morning! Distance is 2412 km! ;-) > > What a progress! Unbelivable! > > 73, Stefan > > > > > > Am 27.10.2010 21:33, schrieb jrusgrove@comcast.net > : > > Stephan > > I've seen WSPR spots on 500 kHz from TF3HZ. Maybe he can be > coaxed to QSY down a bit. > > Jay > > > ----- Original Message ----- From: "Stefan Sch=E4fer" > > > To: > > Sent: Wednesday, October 27, 2010 3:25 PM > Subject: LF: TF? > > > Dear group, > > Does anybody know if someone from Iceland (TF) is QRV > member of this group or are there OMs who are (or have > been) active on LF? > You know what i am thinking about ;-) > > 73, Stefan > > > > > > --------------030708060300020604010408 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Dear Chris,

This is a very pleasing message. I am happy and proud about this. :-)
Well, 2872 km is a real heavy challenge! But surely i will try to send you a suitable signal (seems, i need a new generator ;-) ) and the winther season may help us a little.

Oh, sri, if you are new in the group (?), welcome! :-)

First, most of the activity is on LF/137 kHz or MF/500 kHz, as you probably know. Have you ever been RXing on 137 kHz? I think some people would be very interested to be copied in Israel. Me too. I plan to be QRV again on 137 with the kite antenna soon...

Regarding VLF RX antennas: The PA0RDT mini whip is used by many RX stns on VLF (mostly with some modifications, such as higher C and L values and/or band/low pass filters) and is prooved to be well suitable. There seems to be a tendency that E field antennas are performing better than loop antennas in a noisy region and are mostly better than a long wire antenna.
I have built an E field antenna too which is running all the time on my grabber (http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html). You can see the antenna here: http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber_Antenna_location.html  and the circuit of the antenna is here (today updated!): http://www.iup.uni-heidelberg.de/schaefer_vlf/8,97kHz%20active%20E%20field%20antenna%20by%20DK7FC.jpg

Chris, there was a lot of knowledge accumulated in the last months here in the group, so if you have any questions, just ask. No problem ;-) I have no ideas about SDRs here but all the experts are HERE! ;-)

73, Stefan/DK7FC

PS: Good luck building the antenna!


Am 28.10.2010 21:07, schrieb Chris Gomoiu:
Hello Stefan and LF group,

I would be also interested to check for your signals or those of others. I don't have a LF antenna yet but using the 24m long LW I managed to hear PA0A on 502.4Khz WSPR. Willing to try even lower in frequency and would appreciate any info which may help. Found lots of resources on the net and I'm slowly trying to familiarize myself with the LF challenges.

Planning to construct a PA0RDT mini-whip this weekend and see how it works in my noisy area. Found out that my ADSL modem completely wipes out the 600m band so I switch it off when listening. Using an HPSDR transceiver here GPSDO locked. No LF-VLF TX permit available here yet but I can always listen.

73's Chris 4X1RF
KM72LS



2010/10/28 Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>
LF,

Yesterday in the evening i've got the below message from Jay. After that i wrote an email to TF3HZ and told about VLF, gave him some links and asked if he would be interested to try an attempt to receive my signal...
He has already installed SpecLab and IS interested. He will build my active E field antenna and has ordered the BF862's this morning! Distance is 2412 km! ;-)

What a progress! Unbelivable!

73, Stefan





Am 27.10.2010 21:33, schrieb jrusgrove@comcast.net:

Stephan

I've seen WSPR spots on 500 kHz from TF3HZ. Maybe he can be coaxed to QSY down a bit.

Jay


----- Original Message ----- From: "Stefan Schäfer" <schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Wednesday, October 27, 2010 3:25 PM
Subject: LF: TF?


Dear group,

Does anybody know if someone from Iceland (TF) is QRV member of this group or are there OMs who are (or have been) active on LF?
You know what i am thinking about ;-)

73, Stefan






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