Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id wAFASj5n016639 for ; Thu, 15 Nov 2018 11:28:46 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gNEpT-00050x-Q0 for rs_out_1@blacksheep.org; Thu, 15 Nov 2018 10:24:55 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gNEpS-00050n-HN for rsgb_lf_group@blacksheep.org; Thu, 15 Nov 2018 10:24:54 +0000 Received: from out2-22.antispamcloud.com ([185.201.17.22]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gNEpQ-0000Gz-Fn for rsgb_lf_group@blacksheep.org; Thu, 15 Nov 2018 10:24:53 +0000 Received: from [85.60.35.36] (helo=servigilant.vigilant.es) by mx65.antispamcloud.com with esmtpsa (TLSv1:ECDHE-RSA-AES128-SHA:128) (Exim 4.89) (envelope-from ) id 1gNEpJ-000BRX-Bt for rsgb_lf_group@blacksheep.org; Thu, 15 Nov 2018 11:24:51 +0100 Received: from servigilant.vigilant.local ([fe80::c40d:8140:d722:5448]) by servigilant.vigilant.local ([fe80::c40d:8140:d722:5448%13]) with mapi id 14.03.0123.003; Thu, 15 Nov 2018 11:24:41 +0100 From: =?iso-8859-1?Q?VIGILANT_Luis_Fern=E1ndez?= To: "rsgb_lf_group@blacksheep.org" Thread-Topic: SLF: A first step on SLF | DFCW-5400 Thread-Index: AQHUfMr8jzp9E5Yxf0iJo4yHVf2336VQoJGA Date: Thu, 15 Nov 2018 10:24:39 +0000 Message-ID: <6DB8451D7F3D3947A5918808A59621EA14E1C61D@servigilant.vigilant.local> References: <5BE0C0CE.10008@posteo.de> <5BE19D5E.7000408@posteo.de> <5BED424F.4080207@posteo.de> In-Reply-To: <5BED424F.4080207@posteo.de> Accept-Language: es-ES, en-US Content-Language: es-ES X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.0.22] MIME-Version: 1.0 X-Originating-IP: 85.60.35.36 X-MailAssure-Domain: vigilant.es X-MailAssure-Username: smtpsolarwinds Authentication-Results: antispamcloud.com; auth=pass (login) smtp.auth=smtpsolarwinds@vigilant.es X-MailAssure-Outgoing-Class: ham X-MailAssure-Outgoing-Evidence: Combined (0.23) X-Recommended-Action: accept X-Filter-ID: EX5BVjFpneJeBchSMxfU5t3HO6+tERNLz/53HoNZwm1602E9L7XzfQH6nu9C/Fh9KJzpNe6xgvOx q3u0UDjvOw5j2C7YKailx2Uop+U2Gs8m9etQhNgzEtWqBtUXOJSHVTGbEWWnE2yTxqfzAQugcQw3 GtF7dtcUJdwot1+nirRIeZjZv1oz6oWKgngYgisM8DZztKGImYzpwtV2u5AjtnBQSd9z8kxLpW49 gI7LRCD70WuzEeIYESIPDdUJWOBuPxO0jJAHsPdj1H6RNuBO60m5NOzFyb6byQp3KrGHwAAYIFcZ dV9FymB4yh09XRoOG3gNhjWgIn9EMhhACXfJHpfs332vkt6Wl7MpBkXrMhPAfqmtGTQeo8POuZmc DwPakUDJ/iZViSww8yJJBeO40iObofOmVZ8jq2JCzFshGkbfX8TdqEXkwxwMjsp2mNApg3sUhVGe a1GIQIzAQSWhryERbInMiTBIUBbQ/Dy6Ip4lprBQcgaFwLgmRMoOfSzP/a1CaxG1QPOAWVbHDE16 W6bsVyUy+Ne72iVquZJPo3LonV+E7OMXRvgtdyMlnmWicABz5+BLmFiJNGA/0SKKU6qc8bmfxSs+ MeJoPCPdpG5v3a1Lw0SCZHvY2nldqL5D61OVLoP1Q6wnb/hRIZlIfLEaHGHDukmsgviQSXpmsN22 Tb4Tdy0JXF1Ju3PuLCUkNq5V4WAtJZXC2qV+0qJ7bgRmQbL8wMaN0jOJWMJHfolXbp7GfOsyRQvU HV4/eVnCPAlbDjazCbhs7qBpykynMklGXe6NtxCucctsAhNAxppieQn/z8UtFOqwH/iKkWNT4Qw/ si0LtfynHXJe8jzMLqSnt0bc9wObVlKbHN8OtHofiwMSNhsPEiy5Xyanx+eL/lmcqrp+ZgP1Lb5j QzN+1Q6adtB2Oe88dNhukQEZwoi5Rv4UBMc5RaTDZvGKfpBOXyvnBLFBPBorebXvRPde/zEvuGsl KTrRIXcXpFg5ivY= X-Report-Abuse-To: spam@quarantine3.antispamcloud.com X-Spam-Score: 1.8 (+) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Hi Stefan .... SLF :-O There is film actually in Cinema: "First Man" Is that about you ?? ;-) Congratulations Content analysis details: (1.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [185.201.17.22 listed in list.dnswl.org] 1.5 RCVD_IN_SORBS_WEB RBL: SORBS: sender is an abusable web server [85.60.35.36 listed in dnsbl.sorbs.net] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_KAM_HTML_FONT_INVALID BODY: Test for Invalidly Named or Formatted Colors in HTML X-Scan-Signature: c96efc14f58f84aa05b44c520f48db32 Subject: RE: SLF: A first step on SLF | DFCW-5400 Content-Type: multipart/alternative; boundary="_000_6DB8451D7F3D3947A5918808A59621EA14E1C61Dservigilantvigi_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.1 required=5.0 tests=CELL_PHONE_BOOST,HTML_40_50, HTML_MESSAGE,TO_ADDRESS_EQ_REAL 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 --_000_6DB8451D7F3D3947A5918808A59621EA14E1C61Dservigilantvigi_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Stefan .... SLF :-O There is film actually in Cinema: "First Man" Is that about you ?? ;-) Congratulations PS: Back from trip. Will try to catch you all in LF activity if storms fina= lly finish here 73 de Luis EA5DOM De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blackshe= ep.org] En nombre de DK7FC Enviado el: jueves, 15 de noviembre de 2018 10:54 Para: rsgb_lf_group@blacksheep.org Asunto: Re: SLF: A first step on SLF | DFCW-5400 Hi SLF, Attached is a spectrogram from a reprocessing of my recent DFCW-5400 transm= ission down on 270 Hz. The SNR reaches up to 30 dB in that bandwidth. It sh= ows that messages could be exchanged up to 10 km distance if there would be= someone with a suitable RX/TX system. Now after 'saying hello' on that 111= 0 km band, i'll continue my trip to the end of the spectrum. Next station i= s near 80 Hz, TXing deeper than ZEVS. Maybe i'll come back to 270 Hz from t= he ground loop antenna, if the coming experiments on 470 Hz will be success= ful. 73, Stefan Am 06.11.2018 14:55, schrieb DK7FC: SLF, Now, a 30 character EbNaut message has been sent over the short path. Recep= tion was excellent, with several dB over the decode limit. Even with that p= W power range, some distance can be crossed. With the ham density in my reg= ion, it should be possible to reach someone else (theoretically!) who can c= opy the message and attempt for a split-band two way contact. Capture attached. 73, Stefan Am 05.11.2018 23:14, schrieb DK7FC: Well, today, i did a first step into the ITU radio band 2, SLF. Since 21:00 UTC i'm transmitting on the INV-L on 270.01 Hz. The antenna cur= rent is just 2.5 mA. The ERP is about 6 pW. Almost nothing but anyway a trace becomes visible now on my RX on the tree = in 3.5 km distance (http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF= _Grabber2.html) Of course this is a near field experiment. There, on the 1110 km band, the = far field begins at a distance of 177 km. On the transmitter site i'm using the modified 5 kV mains transformer that = was used to produce 5 kV at 970 Hz. Now there is a series capacitor of abou= t 20 uF applied to the primary winding. Together with internal reactances t= his maximises the peak of the fundamental frequency of the output voltage. The goal of this first experiment is just to put the foot into this part of= the radio spectrum. And to do some pre-tests, trying to optimise filter an= d blanker settings for future tests. In the end i'm planning to work on that frequency from the ground loop ante= nna, which is still in the near field, but anyway :-) 73, Stefan --_000_6DB8451D7F3D3947A5918808A59621EA14E1C61Dservigilantvigi_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Stefan = …. SLF :-O

 = ;

There is film actually in Cinema: “First Man”

Is that about you ?? ;-)

 

Congratulations

 

PS: Back from trip. Will try to catch you all in LF activity if storms= finally finish here

 

73 de Luis

EA5DOM

 

De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep= .org] En nombre de DK7FC
Enviado el: jueves, 15 de noviembre de 2018 10:54
Para: rsgb_lf_group@blacksheep.org
Asunto: Re: SLF: A first step on SLF | DFCW-5400

 

Hi SLF,

Attached is a spectrogram from a reprocessing of my recent DFCW-5400 transm= ission down on 270 Hz. The SNR reaches up to 30 dB in that bandwidth. It sh= ows that messages could be exchanged up to 10 km distance if there would be= someone with a suitable RX/TX system. Now after 'saying hello' on that 1110 km band, i'll continue my trip to th= e end of the spectrum. Next station is near 80 Hz, TXing deeper than ZEVS. = Maybe i'll come back to 270 Hz from the ground loop antenna, if the coming = experiments on 470 Hz will be successful.

73, Stefan


Am 06.11.2018 14:55, schrieb DK7FC:

SLF,

Now, a 30 character EbNaut message has been sent over the short path. Recep= tion was excellent, with several dB over the decode limit. Even with that p= W power range, some distance can be crossed. With the ham density in my reg= ion, it should be possible to reach someone else (theoretically!) who can copy the message and attempt for a s= plit-band two way contact.
Capture attached.

73, Stefan



Am 05.11.2018 23:14, schrieb DK7FC:

Well, today, i did a first step into the ITU radio b= and 2, SLF.

Since 21:00 UTC i'm transmitting on the INV-L on 270.01 Hz. The ante= nna current is just 2.5 mA. The ERP is about 6 pW.
Almost nothing but anyway a trace becomes visible now on my RX on the tree = in 3.5 km distance (http://www.iup.uni-heidelberg.de/schaefer_vlf/DK= 7FC_VLF_Grabber2.html)
Of course this is a near field experiment. There, on the 1110 km band, the far field begins at a distance of 177 km.

On the transmitter site i'm using the modified 5 kV mains transformer that = was used to produce 5 kV at 970 Hz. Now there is a series capacitor of abou= t 20 uF applied to the primary winding. Together with internal reactances t= his maximises the peak of the fundamental frequency of the output voltage.

The goal of this first experiment is just to put the foot into this part of= the radio spectrum. And to do some pre-tests, trying to optimise filter an= d blanker settings for future tests.
In the end i'm planning to work on that frequency from the ground loop ante= nna, which is still in the near field, but anyway :-)

73, Stefan

--_000_6DB8451D7F3D3947A5918808A59621EA14E1C61Dservigilantvigi_--