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 autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; 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 v1IHnQF7011879 for ; Sat, 18 Feb 2017 18:49:27 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cf94R-0001QY-D1 for rs_out_1@blacksheep.org; Sat, 18 Feb 2017 17:45:19 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cf94P-0001QP-Pl for rsgb_lf_group@blacksheep.org; Sat, 18 Feb 2017 17:45:17 +0000 Received: from mout3.freenet.de ([2001:748:100:40::2:5]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cf94L-0004la-52 for rsgb_lf_group@blacksheep.org; Sat, 18 Feb 2017 17:45:16 +0000 Received: from [195.4.92.142] (helo=mjail2.freenet.de) by mout3.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.85 #1) id 1cf94J-00005X-T8 for rsgb_lf_group@blacksheep.org; Sat, 18 Feb 2017 18:45:11 +0100 Received: from localhost ([::1]:46233 helo=mjail2.freenet.de) by mjail2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.85 #1) id 1cf94J-0004EF-NS for rsgb_lf_group@blacksheep.org; Sat, 18 Feb 2017 18:45:11 +0100 Received: from mx0.freenet.de ([195.4.92.10]:48059) by mjail2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.85 #1) id 1cf91j-0003LC-ER for rsgb_lf_group@blacksheep.org; Sat, 18 Feb 2017 18:42:31 +0100 Received: from x4d08fc4a.dyn.telefonica.de ([77.8.252.74]:56238 helo=[192.168.178.26]) by mx0.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1.2:DHE-RSA-AES128-SHA:128) (port 587) (Exim 4.85 #1) id 1cf91j-00049T-23 for rsgb_lf_group@blacksheep.org; Sat, 18 Feb 2017 18:42:31 +0100 To: rsgb_lf_group@blacksheep.org References: <15a523c6252-59e0-1118f@webprd-m14.mail.aol.com> From: DL4YHF Message-ID: <7074ce1c-d6a2-808c-4ea8-04f8f7a3568e@freenet.de> Date: Sat, 18 Feb 2017 18:41:22 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.7.1 MIME-Version: 1.0 In-Reply-To: <15a523c6252-59e0-1118f@webprd-m14.mail.aol.com> X-Originated-At: 77.8.252.74!56238 X-Scan-Signature: b64e297c4577ad617411a4f8f6174ca7 Subject: Re: VLF: EbNaut also on 8270.033333 Hz Content-Type: multipart/alternative; boundary="------------1097F4F4E131EA41B7996FE4" 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: RO X-Status: X-Keywords: X-UID: 10630 This is a multi-part message in MIME format. --------------1097F4F4E131EA41B7996FE4 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Hello Markus and all, Am 18.02.2017 um 18:19 schrieb Markus Vester: > Thanks Wolf, there's indeed a beautiful Whistler festival going > on! After having read the post on the VLF Group, I had listened in > Thursday night which was already quite extraordinary, But right now > the activity is even more intense! And your vlf6 stream seems to be > in a prime position. Are you feeding it from your wireless E-field > antenna? Yes, it's still the low-power purely analog FM-linked antenna rod on top of the remaining part of a Rowan tree, shown near the end of the old VLF page at http://www.qsl.net/dl4yhf/vlf_reception/VLF_Receivers.html . Nice replacement for 'ambient music', only the occasional QRM which sounds like a washing machine disturbs it. Maybe the rabbits living in the basement of our club station are running electronic gadgets... they are the only inhabitants there at the moment :-) 73, Wolf . > > Well, how much power would be needed for a narrowband Amateur signal > to be detected in Madagascar, what is the path loss? Think I've read > somewhere that whistler propagation could possibly even be enhanced by > stimulated emission, providing Maser-like amplification rather than > attenuation. > > Thanks again to the contributors of these beautiful natural radio streams! > > All the best, > Markus (DF6NM) > > > > -----Ursprüngliche Mitteilung----- > Von: DL4YHF > An: rsgb_lf_group > Verschickt: Sa, 18. Feb 2017 15:25 > Betreff: Re: VLF: EbNaut also on 8270.033333 Hz > > Hi VLFers, > > Turn up the power, you may trigger a Whistler ... well, no, joking > aside: At the moment there's an impressive whistler storm happening. > Fascinating listening to Paul's internet VLF audio streams ( > http://abelian.org/vlf/ ). > > 73, > Wolf DL4YHF . > > Am 18.02.2017 um 14:41 schrieb Markus Vester: > > Hi Jacek, VLF, > > from previous successful DK7FC decodes, it looks as if you might > also be able to receive a ~10 dB weaker signal from here (10 uW > EMRP). Apparently the rain has ended now, so I would like to try > an overnight EbNaut transmission with only two characters: > > Frequency: 8270.0333333 Hz, > 2 characters, 8K19A, 18 bit CRC (!), > 90 s symbols, message duration 9:36 hours, > start 2017-02-18 19:00 UT, end 4:36 UT (Sunday) > > The 1/30 Hz frequency offset has been chosen to avoid mutual > interference with the announced DK7FC transmission on 8270.1 Hz: > With the frequency spacing being an integer multiple of both > symbolrates, and synchroneous bit timing, the symbol > waveforms should be orthogonal because the "other" signal always > undergoes a whole number of 360° cycles during the > decoder's symbol integration interval. > > Best 73, > Markus (DF6NM) > > > > -----Ursprüngliche Mitteilung----- > Von: Jacek Lipkowski > > An: rsgb_lf_group > > Verschickt: Di, 14. Feb 2017 17:23 > Betreff: Re: LF: Re: DK7FC EbNaut message on 8270.1 Hz decoded nr > Moscow by RN3AUS > > Nice decode here for your transmission on 13 Fen 2017 20:40 > > found rank 0 ber 3.0469e-01 Eb/N0 10.7 M -1.697070885e+01 [XX] ps > [ 0 0 0 0 0] > carrier phase: 5.3 > carrier Eb/N0: 10.9 > carrier S/N: 21.44 dB in 32.6 uHz > elapsed 29 > > Switched the message to XX (sent to Stefan off list), so i don't > spoil > other's fun > > VY 73 > > Jacek / SQ5BPF > > --------------1097F4F4E131EA41B7996FE4 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit Hello Markus and all,

Am 18.02.2017 um 18:19 schrieb Markus Vester:
Thanks Wolf, there's indeed a beautiful Whistler festival going on! After having read the post on the VLF Group, I had listened in Thursday night which was already quite extraordinary, But right now the activity is even more intense! And your vlf6 stream seems to be in a prime position. Are you feeding it from your wireless E-field antenna?
Yes, it's still the low-power purely analog FM-linked antenna rod on top of the remaining part of a Rowan tree,
shown near the end of the old VLF page at http://www.qsl.net/dl4yhf/vlf_reception/VLF_Receivers.html .

Nice replacement for 'ambient music', only the occasional QRM which sounds like a washing machine disturbs it. Maybe the rabbits living in the basement of our club station are running electronic gadgets... they are the only inhabitants there at the moment :-)

73,
  Wolf .


Well, how much power would be needed for a narrowband Amateur signal to be detected in Madagascar, what is the path loss? Think I've read somewhere that whistler propagation could possibly even be enhanced by stimulated emission, providing Maser-like amplification rather than attenuation.

Thanks again to the contributors of these beautiful natural radio streams!

All the best,
Markus (DF6NM)
 


-----Ursprüngliche Mitteilung-----
Von: DL4YHF <dl4yhf@freenet.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Sa, 18. Feb 2017 15:25
Betreff: Re: VLF: EbNaut also on 8270.033333 Hz

Hi VLFers,

Turn up the power, you may trigger a Whistler ... well, no, joking aside: At the moment there's an impressive whistler storm happening. Fascinating listening to Paul's internet VLF audio streams ( http://abelian.org/vlf/ ).

73,
  Wolf DL4YHF .

Am 18.02.2017 um 14:41 schrieb Markus Vester:
Hi Jacek, VLF,

from previous successful DK7FC decodes, it looks as if you might also be able to receive a ~10 dB weaker signal from here (10 uW EMRP). Apparently the rain has ended now, so I would like to try an overnight EbNaut transmission with only two characters:

Frequency: 8270.0333333 Hz,
2 characters, 8K19A, 18 bit CRC (!),
90 s symbols, message duration 9:36 hours,
start 2017-02-18 19:00 UT, end 4:36 UT (Sunday) 

The 1/30 Hz frequency offset has been chosen to avoid mutual interference with the announced DK7FC transmission on 8270.1 Hz: With the frequency spacing being an integer multiple of both symbolrates, and synchroneous bit timing, the symbol waveforms should be orthogonal because the "other" signal always undergoes a whole number of 360° cycles during the decoder's symbol integration interval.

Best 73,
Markus (DF6NM)
    


-----Ursprüngliche Mitteilung-----
Von: Jacek Lipkowski <sq5bpf@lipkowski.org>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Di, 14. Feb 2017 17:23
Betreff: Re: LF: Re: DK7FC EbNaut message on 8270.1 Hz decoded nr Moscow by RN3AUS

Nice decode here for your transmission on 13 Fen 2017 20:40

found rank 0 ber 3.0469e-01 Eb/N0 10.7 M -1.697070885e+01 [XX] ps [ 0 0 0 0 0]
carrier phase: 5.3
carrier Eb/N0: 10.9
carrier S/N: 21.44 dB in 32.6 uHz
elapsed 29

Switched the message to XX (sent to Stefan off list), so i don't spoil
other's fun

VY 73

Jacek / SQ5BPF


--------------1097F4F4E131EA41B7996FE4--