Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,RCVD_IN_DNSWL_MED, RCVD_IN_SORBS_SPAM,SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v5NDxH1O023416 for ; Fri, 23 Jun 2017 15:59:19 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dOP2W-0002Id-HH for rs_out_1@blacksheep.org; Fri, 23 Jun 2017 14:54:24 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dOP2V-0002IU-LF for rsgb_lf_group@blacksheep.org; Fri, 23 Jun 2017 14:54:23 +0100 Received: from omr-a019e.mx.aol.com ([204.29.186.67]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1dOP2S-0007CR-Bz for rsgb_lf_group@blacksheep.org; Fri, 23 Jun 2017 14:54:22 +0100 Received: from mtaomg-aaf01.mx.aol.com (mtaomg-aaf01.mx.aol.com [172.26.127.99]) by omr-a019e.mx.aol.com (Outbound Mail Relay) with ESMTP id 7D46938000AF for ; Fri, 23 Jun 2017 09:54:18 -0400 (EDT) Received: from core-acc03b.mail.aol.com (core-acc03.mail.aol.com [172.26.125.13]) by mtaomg-aaf01.mx.aol.com (OMAG/Core Interface) with ESMTP id 5734C38000089 for ; Fri, 23 Jun 2017 09:54:17 -0400 (EDT) Received: from 188.192.44.165 by webprd-a68.mail.aol.com (10.72.52.222) with HTTP (WebMailUI); Fri, 23 Jun 2017 09:54:16 -0400 Date: Fri, 23 Jun 2017 09:54:17 -0400 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15cd53b5f0f-59bd-d2f5@webprd-a68.mail.aol.com> In-Reply-To: MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.44.165] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1498226058; bh=TWQoUbX25l02nXHaDSfTmKfPm+EECR+wVzb5v7R4R8w=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=y3kq8642A322uCGH0o535Ph2DbB4CjU9jEnAB/qAuxVAURi0SfRhDZI2aKraVZ2qp Re9xrjvpT9CC9stiac1z99OxfyRgcLXsITgHU40MJNlUZTOOIPmSUYQEdVpAlgLIeL CGB5l7qjjkGVl1PCYnmfeDOgor+xmYsiML2VdD5o= x-aol-sid: 3039ac1a7f63594d1d8911db X-Scan-Signature: 58ba09640deeac370be75328ed1b0fef Subject: Re: LF: hunting IK1HGI on LF Content-Type: multipart/alternative; boundary="----=_Part_66114_1570491087.1498226056972" 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 2.75 Status: O X-Status: X-Keywords: X-UID: 12059 ------=_Part_66114_1570491087.1498226056972 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Tried the first four transmissions (11:30, 12:00, 12:30, 13:00), but no pla= usible decode appeared, and no hint on the phase graphs either. Looks llke = we simnply need more SNR... During the day, phase stability would surely su= pport much longer transmissions, e.g. 3 s symbols. Or we can try again afte= r darkness, hoping for moderate lightning activity. Best 73, Markus -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Domenico IZ7SLZ An: rsgb_lf_group Verschickt: Fr, 23. Jun 2017 13:25 Betreff: Re: LF: hunting IK1HGI on LF Hello LF, Yes, IK1HGI is ready for EbNaut transmission this afternoon starting from 1= 1:30 UT every 30 minutes. QRG =3D 137493 Hz, char =3D 6, code 8K19A, period =3D 1 second. Duration 9= ' 20'' Good luck. 73, Domenico. PS: thanks to Paul N. for the advice. I will try his suggestions. On 23 June 2017 at 12:55, Markus Vester wrote: Thanks Domenico. Yesterday evening we had monstrous QRN, but a faint and stable line became = visible on my opds between 4 and 5:30 UT. An opds-32 detection requires abo= ut 15 dB for the central carrier of the 50% AM transmission, equivalent to = 21 dB for a pure carrier in 0.47 mHz. We have been detecting IK1IGI frequen= tly here, and I'm indeed interested to attempt an EbNaut decode. The best t= ime may be around noon (i.e. now), when dayrime skywave is strongest and QR= N hasn't built up yet. Best 73, Markus -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Domenico IZ7SLZ An: rsgb_lf_group Verschickt: Fr, 23. Jun 2017 11:28 Betreff: LF: hunting IK1HGI on LF Hi LF, in these days, Tony IK1HGI from JN45jj, is transmitting some (not announced= ) EbNaut test message on LF and he is active in op32. He is using a very st= able exciter formed by a GPS Neo-7 which time port TP5 has been reprogramme= d to output directly the operating frequency (i.e. 137493,000 Hz). I invite all interested LF operators to try this solution becouse it's chea= p, easy to built and it works ! Riccardo IW4DXW, who had this idea, is writing some=20 post to the group with his indications on buffering the TP5 signal, obtain = a BPSK and ASK modulator, reprogramming the GPS parameters. Erp transmitted by Tony is low due to very short antenna placed on his balc= on, short cap-hat wires, poor ground system and low power output (around 7= 0 W) with some mismatching. So catching his signal is a challenge for me in JN80nu (abt. 920 km). Last night i saw some traces of his signal on my opds Spectrum Lab waterfal= l but no opera detections were possibile even by reducing thresholds in opd= s.ini. I have also used Paul Nicholson's vlfrx-tools programs to record the audio = coming from LF receiver. Then i tried this morning to obtain 4 hour-long = FFT centered on IK1HGI qrg after filtering and blanking the signal.=20 I got an evident peak that i'm almost sure that comes from Tony. These are the commands that i have used (i'm new on vlfrx-tools so i hope d= o not make big mistakes): vtread -v -T2017-06-22_23:40,+16000 /media/iz7slz/Storage/ | vtfilter -v -h bp,f=3D1500,w=3D2000 |=20 vtblank -v -a2 -d0 -t10 | vtnspec -v -f 1493 -w0.02 -r6.25e-5 > spectrum.dat that vtblank settings comes out after many attempts. 73, Domenico IZ7SLZ ------=_Part_66114_1570491087.1498226056972 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Tried the first four transmissions (11:30, 12:00, 12:30,= 13:00), but no plausible decode appeared, and no hint on the phase gr= aphs either. Looks llke we simnply need more SNR... During the day, ph= ase stability would surely support much longer transmissions, e.g. 3 s symb= ols. Or we can try again after darkness, hoping for moderate lightning acti= vity.

Best 73,
Markus



-----Urspr=C3=BCngliche Mitt= eilung-----
Von: Domenico IZ7SLZ <iz7slz.domenico@gmail.com>
A= n: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Fr, 23= . Jun 2017 13:25
Betreff: Re: LF: hunting IK1HGI on LF

He= llo LF,

Yes, IK1HGI is ready for EbNaut transmission this afte= rnoon starting from 11:30 UT every 30 minutes.
QRG =3D 137493 Hz, = char =3D 6, code 8K19A,  period =3D 1 second. Duration 9' 20''

=
Good luck.
73, Domenico.

PS: thanks to Paul N. = for the advice. I will try his suggestions.


On 23 June 2017 at = 12:55, Markus Vester <markusvester@aol.com<= /a>> wrote:
<= div style=3D"color: black; font-family: arial,helvetica,sans-serif; font-si= ze: 10pt;">Thanks Domenico.

Yesterday evening we had monstrous QRN,&= nbsp;but a faint and stable line became visible on my opds between 4 and 5:= 30 UT. An opds-32 detection requires about 15 dB for the central carri= er of the 50% AM transmission, equivalent to 21 dB for a pure car= rier in 0.47 mHz. We have been detecting IK1IGI frequently here, and I= 'm indeed interested to attempt an EbNaut decode. The best time may be= around noon (i.e. now), when dayrime skywave is strongest and QRN hasn't b= uilt up yet.

Best 73,
Markus

-----Urspr=C3=BCngliche Mitte= ilung-----
Von: Domenico IZ7SLZ <iz7slz.domenico@gma= il.com>
An: rsgb_lf_group <rsgb_lf_group@bl= acksheep.org>
Verschickt: Fr, 23. Jun 2017 11:28
Betreff: LF: = hunting IK1HGI on LF
Hi LF,
in these days, Tony IK1HGI= from JN45jj, is transmitting some (not announced) EbNaut test message on L= F and he is active in op32. He is using a very stable exciter formed by a G= PS Neo-7 which time port TP5 has been reprogrammed to output directly the o= perating frequency (i.e. 137493,000 Hz).
I invite all intere= sted LF operators to try this solution becouse it's cheap, easy to built an= d it works !
Riccardo IW4DXW, who had this idea, is writing s= ome
post to the group with his indications on buffering the = TP5 signal, obtain a BPSK and ASK modulator, reprogramming the GPS paramete= rs.
Erp transmitted by Tony is low due to very short antenna = placed on his balcon, short cap-hat wires,  poor ground system and low= power output (around 70 W) with some mismatching.
So catching  his= signal is a challenge for me in JN80nu (abt. 920 km).

Last night i = saw some traces of his signal on my opds Spectrum Lab waterfall but no oper= a detections were possibile even by reducing thresholds in opds.ini.
I have also used Paul Nicholson's vlfrx-tools programs to re= cord the audio coming from LF receiver. Then i tried this morning to obtain=   4 hour-long  FFT  centered on IK1HGI qrg after filtering a= nd blanking the signal. 

I got an evident peak that i'm almost = sure that comes from Tony.

These are the commands that i have used (= i'm new on vlfrx-tools so i hope do not make big mistakes):

vtread -= v -T2017-06-22_23:40,+16000 /media/iz7slz/Storage/ |
vtfilter -v -h bp,f= =3D1500,w=3D2000 |
vtblank -v -a2 -d0 -t10 |
vtnspec -v -f 1493 -w0.= 02 -r6.25e-5 > spectrum.dat

that vtblank settings comes out after= many attempts.
73, Domenico IZ7SLZ






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