Return-Path: X-Spam-DCC: paranoid 1290; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.3 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_30_40,HTML_MESSAGE,RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u41FDDLd011763 for ; Sun, 1 May 2016 17:13:13 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1awt0A-00018N-SR for rs_out_1@blacksheep.org; Sun, 01 May 2016 16:09:42 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1awt0A-00018E-Im for rsgb_lf_group@blacksheep.org; Sun, 01 May 2016 16:09:42 +0100 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1awt08-0005Yu-SG for rsgb_lf_group@blacksheep.org; Sun, 01 May 2016 16:09:41 +0100 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id E0C6A2094A for ; Sun, 1 May 2016 17:09:39 +0200 (CEST) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3qyW7R5ytPz5vN5 for ; Sun, 1 May 2016 17:09:39 +0200 (CEST) Message-ID: <57261C33.6010603@posteo.de> Date: Sun, 01 May 2016 17:09:39 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <1545cc43544-7b51-40b@webprd-a09.mail.aol.com> <57222E30.1080202@posteo.de> <57225653.3090907@abelian.org> <5725FCD5.40606@posteo.de> <57260D6A.3040503@abelian.org> <572613AC.90704@posteo.de> In-Reply-To: <572613AC.90704@posteo.de> X-Scan-Signature: 79aab7440207271f32757adc503f8c76 Subject: Re: ULF: EbNaut transmissions on lower frequencies?, pre-tests Content-Type: multipart/alternative; boundary="------------080004050105000508010406" 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 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 7966 This is a multi-part message in MIME format. --------------080004050105000508010406 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit OK, a new transmission at 130 mA on 8.27 kHz. *f = 8270.1 Hz Start time: 01.05.2016 15:00:02 UTC Period: 200 s Length: 5 CRC 16 Coding 8K19A Duration: 28h, 26m, 40s *73, Stefan Am 01.05.2016 16:33, schrieb DK7FC: > RR, > > OK! > Do we know enough about the phase behaviour on 8.27 kHz, so we know > where we are starting from? > For ULF we would need longer symbol periods, that's sure. So it could > be interesting first to try 200s periods and a shorter message. 5 > characters should be a goal, suitable for a few callsigns of active > amateur radio stations :-) > > 5 characters at 200s symbols, that's 28 hours and 26 minutes and 40 > seconds. > > I will start a transmission at that rate (this time without SL > restarting after 24 hours) and at 6 dB lower power (because of the > beeeeeeep during the working day tomorrow). 6 dB less (abt 125 mA) > should be no problem at that rate. > A first pre-test. > > The cavity resonances are the frequencies seen as a horizontal > (diurnal frequency variation) line in this capture from last year: > https://dl.dropboxusercontent.com/u/19882028/VLF/dk7fc_VLF_150718_1326.jpg > > > 73, Stefan --------------080004050105000508010406 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit OK, a new transmission at 130 mA on 8.27 kHz.

f = 8270.1 Hz
Start time: 01.05.2016 15:00:02 UTC
Period: 200 s
Length: 5
CRC 16
Coding 8K19A
Duration: 28h, 26m, 40s

73, Stefan

Am 01.05.2016 16:33, schrieb DK7FC:

RR,

OK!
Do we know enough about the phase behaviour on 8.27 kHz, so we know where we are starting from?
For ULF we would need longer symbol periods, that's sure. So it could be interesting first to try 200s periods and a shorter message. 5 characters should be a goal, suitable for a few callsigns of active amateur radio stations :-)

5 characters at 200s symbols, that's 28 hours and 26 minutes and 40 seconds.

I will start a transmission at that rate (this time without SL restarting after 24 hours) and at 6 dB lower power (because of the beeeeeeep during the working day tomorrow). 6 dB less (abt 125 mA) should be no problem at that rate.
A first pre-test.

The cavity resonances are the frequencies seen as a horizontal (diurnal frequency variation) line in this capture from last year: https://dl.dropboxusercontent.com/u/19882028/VLF/dk7fc_VLF_150718_1326.jpg

73, Stefan

--------------080004050105000508010406--