Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,RCVD_IN_DNSWL_MED, 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 uBTJnlZ2001197 for ; Thu, 29 Dec 2016 20:49:48 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cMgec-0005CI-Jy for rs_out_1@blacksheep.org; Thu, 29 Dec 2016 19:46:22 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cMgeb-0005C9-On for rsgb_lf_group@blacksheep.org; Thu, 29 Dec 2016 19:46:21 +0000 Received: from mail-qt0-x22b.google.com ([2607:f8b0:400d:c0d::22b]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cMgeY-0001j6-Ok for rsgb_lf_group@blacksheep.org; Thu, 29 Dec 2016 19:46:20 +0000 Received: by mail-qt0-x22b.google.com with SMTP id p16so377374885qta.0 for ; Thu, 29 Dec 2016 11:46:18 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=D1BRWS1C47g8CLNGQ4Bgn3HEHk795UK3siVAEFx5f9Q=; b=NCzPYkST7+x9VvlU70G2jSlV4v/A7aTps4c3fQ4cnW1Hd8kGGka/nePF5Dh/lK6rzM CrX3GzyluRp4ZaSq53C2Pov0TcheKp7xuIgAD4wkLJrRli6AhWu18iWUp7+JIAZRW/Dn S7Pv8jRfkHm+mymFFwX4jgGKknKyZsmWTkBaxqFgdPqK4qVb0V0iaBd94sc7Vu3EaQXC YdfHQKh5Zu39pacsAlGmGaTNdfx2RsuwfRyiUi6EwWBHc2UDsjoTupKBDlRPrgSAw9cS Hm6HKDY+YSEKigUR+9RUJ1b2N7PInIIbI1lp9zFdeGT++JbmSB7/j6jmMBy2EXbiLW6y BKnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=D1BRWS1C47g8CLNGQ4Bgn3HEHk795UK3siVAEFx5f9Q=; b=njmibGYUTpQ6y0C2CGzRVYP2wgK3p3c1jxdXc2zXKea8LhTjAmZG9wzssjxeQ3XnZO eaGwnBAV4DX9sbIuQc8UsfxCyYI0+IXug7+n9JzzrZuwnsqOYHQbRw7acXC2OVgp0TJE /7K80tQzPyA5eVnWbZE3FNAnCZKOEIENHBxW6x1YVD7tEzfX+5G300VcUVYZWdf89Y5+ qMyvcD6X32aaT1SJHrfbzPnPAPerkPfu6+w7X5q/KQ6W61OJi6HLodl2NoVoE9XBPmsA lS5virX931ORKx1K8QU9GiWiRzAc6Doo7BTgffqOg0+m3ReKIh6ZQuSU7Te5QVZL8U2j exYw== X-Gm-Message-State: AIkVDXLrFgxVfBVU/LD+UevYsBSJrAJvTracxGfz6Gtf75IHQ31i4JLNR6wvwP/M1/j5foKvlOCsAiQNA8katw== X-Received: by 10.200.45.75 with SMTP id o11mr44579439qta.254.1483040777263; Thu, 29 Dec 2016 11:46:17 -0800 (PST) MIME-Version: 1.0 Received: by 10.12.181.9 with HTTP; Thu, 29 Dec 2016 11:46:16 -0800 (PST) Received: by 10.12.181.9 with HTTP; Thu, 29 Dec 2016 11:46:16 -0800 (PST) In-Reply-To: <15947286237-3edb-2331b@webprd-a15.mail.aol.com> References: <15946ff1a8d-6491-23af8@webprd-a52.mail.aol.com> <15947286237-3edb-2331b@webprd-a15.mail.aol.com> From: Riccardo Zoli Date: Thu, 29 Dec 2016 20:46:16 +0100 Message-ID: To: LF Group X-Scan-Signature: 4a8faa6952847c1ec651f883b63fc053 Subject: Re: LF: EbNaut beaconing from JN64 Content-Type: multipart/alternative; boundary=001a1142b174b76ad80544d156ef 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: 9998 --001a1142b174b76ad80544d156ef Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Joe, Markus, Domenico, LF. Many thanks for your efforts to try to discover my signal in Joe's recordings in the past few days. I'm on air from 20:00z, every :00 min., with a new message on 137485.0006 Hz, 8K19A, 2 sec., 8 char (1 min pre-carrier). All the best 73 de IW4DXW Riccardo Il 28/Dic/2016 21:42, "Markus Vester" ha scritto: > > PS I have scheduled 5 minute carriers before and after each sequence, so > that might also help finding the signal. > PS Corrected a couple of typos below, regarding soundcard glitches. > > 73, Markus > > -----Urspr=C3=BCngliche Mitteilung----- > Von: Markus Vester > An: rsgb_lf_group > Verschickt: Mi, 28 Dez 2016 8:54 pm > Betreff: Re: LF: EbNaut beaconing from JN64 > > Hi Joe, > > sorry to read the mishap regarding the poor RasPi memory card. Don't worr= y > too much about hitting the "correct" Pilot frequency - it doesn't matter = as > long as we know where it is, or the frequency word actually sent to the > DDS. If you like you might just use the magic number 59055800 ( =3D 0385= 1eb8 > hex) to come back to the old 137499.99925 Hz. > > Glitches seem rare enough not to be a big problem - I reviewed your files > from the other night (Dec 10/11) and found only a single one shortly afte= r > 23 UT. Sometimes leaving the PC alone seems to help, avoiding unnecessary > user interface activity. > > Anyway LF conditions seem to be improving, and my favourite northern > propagation indicaters (Loran-C Korea and Ussurisk) are picking up a bit = of > strength. Thought I might send a bit more EbNaut tonight, using same > parameters as before: > 137490 Hz, 2 sec, 8 char, 8K19A, starting on the hour plus about 0.3 s > soundcard delay. > Still need to think up a message ;-). > > Best 73, > Markus (DF6NM) > > -----Urspr=C3=BCngliche Mitteilung----- > Von: jcraig > An: rsgb_lf_group > Verschickt: Mi, 28 Dez 2016 7:01 pm > Betreff: Re: LF: EbNaut beaconing from JN64 > > Hi Markus, > > Thank-you for your efforts. The pilot was generated using a raspi/ad9851 > but there have been troubles with instability. Bypassing, shielding, etc > over the past few days yeielded no satisfaction and, sadly, a fried pi/SD > card! The arduino still works but the high precision math has to > be done on another machine as work continues on getting a replacement > pilot. > > 73 Joe VO1NA > > PS Stefan's coil is very compact. 0,4 mm wire? Hope it can take the kV! > PPS Paul's article greatly apprectiated. Thanks! > PPPS All the best to all in 2017 > > > > > On Sun, 25 Dec 2016, Markus Vester wrote: > > > Hi Joe, > > > > > > today I found the time to look into your files from Dec 19/20 > (1220xx08.txt etc.). The pilot level is just right now. Assuming an > accurate 10 MHz DDS-clock, the theoretical pilot frequency would be > 137499.999255 Hz, consistent with the -0.8 mHz offset that I had found la= st > time. This allows us to determine the course of your RX center frequency, > which apparently drifted about 10 mHz upwards during that night > (137499.8988 to 137499.9088 Hz). > > > > > > Some of the files (e.g. 0708 and 0608, see png) showed phase jumps, > which are presumably due to occasional short audio dropouts in the > soundcard processing. In principle it should be possible to correct these > glitches a-posteriori but I have not attempted to do so. The 0308, 0408 a= nd > 0508 files looked good so I calculated the expected offsets for Ric's > transmit frequency and attempted decodes. Unfortunately no useful result > appeared yet. > > > > > > LF DX conditions haven't been too good lately. But I'm sure that once > they improve, you will be able to pick up more than one European EbNaut > station. > > > > > > Best 73, > > Markus > > > --001a1142b174b76ad80544d156ef Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable


Hi Joe, Markus, Domenico, LF.

Many thanks for your efforts to try to discover my signal in= Joe's recordings in the past few days.
I'm on air from 20:00z, every :00 min., with a new message on 137485.00= 06 Hz, 8K19A, 2 sec., 8 char (1 min pre-carrier).

All the best

73 de IW4DXW Riccardo

Il 28/Dic/2016 21:42, "Markus Vester" = <markusvester@aol.com> ha= scritto:

PS I have scheduled=C2=A05 minute carriers before and after each se= quence, so that might also help finding the signal.
PS Corrected a coupl= e of typos below, regarding=C2=A0soundcard glitches.

73, Markus
<= br>-----Urspr=C3=BCngliche Mitteilung-----
Von: Markus Vester <markusvester@aol.com>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: = Mi, 28 Dez 2016 8:54 pm
Betreff: Re: LF: EbNaut beaconing from JN64
<= br>
Hi Joe,
sorry to read the mishap regarding the poor RasPi=C2=A0memory card. Do= n't worry too much about hitting the "correct" Pilot frequenc= y - it doesn't matter as long as we know where it is, or=C2=A0the frequ= ency word actually sent to the DDS. If you like=C2=A0you might just=C2=A0us= e =C2=A0the magic number 59055800 ( =3D 03851eb8 hex) to come back to the o= ld 137499.99925 Hz.

Glitches seem=C2=A0rare=C2=A0enough not to be a = big problem - I reviewed=C2=A0your files from the other night (Dec 10/11) a= nd found only a single one shortly after 23=C2=A0UT. Sometimes leaving the = PC alone seems to help, avoiding unnecessary user interface activity.
Anyway=C2=A0LF conditions seem to be improving, and my favourite northern= propagation indicaters (Loran-C Korea and Ussurisk) are picking up a bit o= f strength. Thought I=C2=A0might=C2=A0send a bit more=C2=A0EbNaut tonight, = using same parameters as before:=C2=A0
=C2=A0137490 Hz, 2 sec, 8 char, 8= K19A,=C2=A0starting=C2=A0on the=C2=A0hour plus about 0.3 s soundcard delay.= =C2=A0=C2=A0
Still need to think up a message ;-).

Best 73,
Ma= rkus (DF6NM)

-----Urspr=C3=BCngliche Mitteilung-----
Von: jcraig= <jcraig@mun.ca&g= t;
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mi, = 28 Dez 2016 7:01 pm
Betreff: Re: LF: EbNaut beaconing from JN64

<= /div>Hi Markus,

Thank-you for your efforts. The pilot was generated= using a raspi/ad9851
but there have been troubles with instability. Byp= assing, shielding, etc
over the past few days yeielded no satisfaction a= nd, sadly, a fried pi/SD
card! The arduino still works but the high pre= cision math has to
be done on another machine as work continues on getti= ng a replacement
pilot.

73 Joe VO1NA

PS Stefan's coil= is very compact. 0,4 mm wire? Hope it can take the kV!
PPS Paul's= article greatly apprectiated. Thanks!
PPPS All the best to all in 201= 7




On Sun, 25 Dec 2016, Markus Vester wrote:

> = Hi Joe,
>
>
> today I found the time to look into your fi= les from Dec 19/20 (1220xx08.txt etc.). The pilot level is just right now. = Assuming an accurate 10 MHz DDS-clock, the theoretical pilot frequency woul= d be 137499.999255 Hz, consistent with the -0.8 mHz offset that I had found= last time. This allows us to determine the course of your RX center freque= ncy, which apparently drifted about 10 mHz upwards during that night (13749= 9.8988 to 137499.9088 Hz).
>
>
> Some of the files (e.g. = 0708 and 0608, see png) showed phase jumps, which are presumably due to occ= asional short audio dropouts in the soundcard processing. In principle it s= hould be possible to correct these glitches a-posteriori but I have not att= empted to do so. The 0308, 0408 and 0508 files looked good so I calculated = the expected offsets for Ric's transmit frequency and attempted decodes= . Unfortunately no useful result appeared yet.
>
>
> LF D= X conditions haven't been too good lately. But I'm sure that once t= hey improve, you will be able to pick up more than one European EbNaut stat= ion.
>
>
> Best 73,
> Markus
>
--001a1142b174b76ad80544d156ef--