Return-Path: Received: from mtain-di01.r1000.mx.aol.com (mtain-di01.r1000.mx.aol.com [172.29.64.5]) by air-dc06.mail.aol.com (v129.4) with ESMTP id MAILINDC061-86024d338766c7; Sun, 16 Jan 2011 19:03:50 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-di01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 942F7380000B9; Sun, 16 Jan 2011 19:03:48 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PecYZ-0005Jl-2y for rs_out_1@blacksheep.org; Mon, 17 Jan 2011 00:02:47 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PecYY-0005Jc-AC for rsgb_lf_group@blacksheep.org; Mon, 17 Jan 2011 00:02:46 +0000 Received: from imr-mb01.mx.aol.com ([64.12.207.164]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PecYV-0006FX-3Y for rsgb_lf_group@blacksheep.org; Mon, 17 Jan 2011 00:02:46 +0000 Received: from mtaout-db04.r1000.mx.aol.com (mtaout-db04.r1000.mx.aol.com [172.29.51.196]) by imr-mb01.mx.aol.com (8.14.1/8.14.1) with ESMTP id p0H02UcJ008687 for ; Sun, 16 Jan 2011 19:02:30 -0500 Received: from White (nrbg-4dbe6ee4.pool.mediaWays.net [77.190.110.228]) by mtaout-db04.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 16E7BE000116 for ; Sun, 16 Jan 2011 19:02:26 -0500 (EST) Message-ID: From: "Markus Vester" To: References: <4D337D76.9020206@iup.uni-heidelberg.de> Date: Mon, 17 Jan 2011 01:02:25 +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: LF: DF6NM copied from the highway... Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01CBB5E2.344785D0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40,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: 3039ac1d40054d3387644a11 X-AOL-IP: 195.171.43.25 ------=_NextPart_000_000C_01CBB5E2.344785D0 Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable Hi Stefan, thank you for this extraordinary report! This is really fun= , even though the Hell stuff may still involve a bit of gXXXXwork ;-) But beware you've been caught speeding... There is clearly a 60 mHz Do= ppler variation in the screenshot, implying a change in radial velocit= y of 132 m/s. So you must have been doing at least 238 km/h ;-))=20 Next we'll have Dave 'YXM show us how to get the transmitter into the= other car http://www.wireless.org.uk/mobile.htm , and strive towards a truely mobile-to-mobile LF contact. Best 73, Markus (DF6NM) From: Stefan Sch=E4fer=20 Sent: Monday, January 17, 2011 12:21 AM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: DF6NM copied from the highway... LF, I've been on a tour in Freiburg over the weekend and just back home.= It=20 was possible to check my modified GSM external car antenna (with a=20 magnet foot), modified as an active antenna for 137 kHz. The RX is my= =20 homemade receiver (12V/50mA, SBL-3, 125 kHz downconverting). Between= RX=20 and antenna is about 4m RG174. Signals were monitored on my netbook=20 using SpecLab. The soundcard drift is compensated by locking on DLF (1= 53=20 kHz) which worked very well. I've used no external GPS module so the= =20 etal wasn't in a PLL, never mind. I've been watching the QRSS-3 and QRSS-60 active region while beeing= on=20 the highway A5, see:=20 http://maps.google.de/maps?f=3Dd&source=3Ds_d&saddr=3Dheidelberg&daddr= =3Dfreiburg&hl=3Dde&geocode=3DFSzQ8QIdXXOEACnN3MwOBcGXRzHXOiREAOrm7w%3= BFQJh3AIdx9Z3ACll1gtWJhuRRzGwV9-lt2sfBA&mra=3Dls&sll=3D47.997186,7.853= 767&sspn=3D0.145654,0.438766&g=3Dfreiburg&ie=3DUTF8&ll=3D48.821333,7.9= 10156&spn=3D4.585752,14.040527&z=3D6 This was the first test with the /m LF antenna and there seems to be= a=20 lack of sensitivity of about 20 dB. The LF noise is just a few dB abov= e=20 the soundcards noise, DCF39 appeared at 45 dB on 2.8 Hz. There was=20 almost no local noise from the car, just some 420 kV lines near the=20 highway caused QRM when driving under or near them. Although there is a lack of sensitivity, it was anyway possible to cop= y=20 DF6NM in QRSS-60 and in HELL (480 mHz FFT, traces visible) during=20 driving. See the attached pictures. Copy of "NM" was near Karlsruhe,= =20 about 200 km distance. I hope to improve the SNR / sensitivity now and will be able to copy= him=20 and others in CW to try a /m xband QSO... 73, Stefan/DK7FC ------=_NextPart_000_000C_01CBB5E2.344785D0 Content-Type: text/html; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable
Hi Stefan, thank you for this ex= traordinary=20 report! This is really fun, even though the Hell stuff may still invol= ve a bit=20 of gXXXXwork ;-)
 
But beware you've been caught sp= eeding...=20 There is clearly a 60 mHz Doppler variation in the=20 screenshot, implying a change in radial velocity of 132 m/s. So= you must=20 have been doing at least 238 km/h ;-)) 
 
Next we'= ll have=20 Dave 'YXM show us how to get the transmitter= into the=20 other car
and strive towards=  a truely=20 mobile-to-mobile LF contact.
 
Best 73,
Markus (DF6NM)
 

Sent: Monday, January 17, 2011 12:21 AM
Subject: LF: DF6NM copied from the highway...
<= /DIV>
=
LF,

I've been on a=20 tour in Freiburg over the weekend and just back home. It
was possi= ble to=20 check my modified GSM external car antenna (with a
magnet foot),= modified as=20 an active antenna for 137 kHz. The RX is my
homemade receiver (12V= /50mA,=20 SBL-3, 125 kHz downconverting). Between RX
and antenna is about 4m= RG174.=20 Signals were monitored on my netbook
using SpecLab. The soundcard= drift is=20 compensated by locking on DLF (153
kHz) which worked very well. I'= ve used no=20 external GPS module so the
etal wasn't in a PLL, never mind.
I've=20 been watching the QRSS-3 and QRSS-60 active region while beeing on the=20 highway A5, see:
http://maps.goog= le.de/maps?f=3Dd&source=3Ds_d&saddr=3Dheidelberg&daddr=3Df= reiburg&hl=3Dde&geocode=3DFSzQ8QIdXXOEACnN3MwOBcGXRzHXOiREAOrm= 7w%3BFQJh3AIdx9Z3ACll1gtWJhuRRzGwV9-lt2sfBA&mra=3Dls&sll=3D47.= 997186,7.853767&sspn=3D0.145654,0.438766&g=3Dfreiburg&ie= =3DUTF8&ll=3D48.821333,7.910156&spn=3D4.585752,14.040527&z= =3D6

This=20 was the first test with the /m LF antenna and there seems to be a
= lack of=20 sensitivity of about 20 dB. The LF noise is just a few dB above
th= e=20 soundcards noise, DCF39 appeared at 45 dB on 2.8 Hz. There was
alm= ost no=20 local noise from the car, just some 420 kV lines near the
highway= caused QRM=20 when driving under or near them.

Although there is a lack of se= nsitivity,=20 it was anyway possible to copy
DF6NM in QRSS-60 and in HELL (480= mHz FFT,=20 traces visible) during
driving. See the attached pictures. Copy of= "NM" was=20 near Karlsruhe,
about 200 km distance.

I hope to improve th= e SNR /=20 sensitivity now and will be able to copy him
and others in CW to= try a /m=20 xband QSO...

73, Stefan/DK7FC
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