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,T_KAM_HTML_FONT_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 mailn.lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id uBF1SC6q024946 for ; Thu, 15 Dec 2016 02:28:13 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cHKiJ-0003pi-CE for rs_out_1@blacksheep.org; Thu, 15 Dec 2016 01:20:03 +0000 Received: from [195.171.43.34] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cHKiH-0003pZ-Sd for rsgb_lf_group@blacksheep.org; Thu, 15 Dec 2016 01:20:01 +0000 Received: from resqmta-ch2-08v.sys.comcast.net ([2001:558:fe21:29:69:252:207:40]) by relay2.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cHKiD-0004X3-1A for rsgb_lf_group@blacksheep.org; Thu, 15 Dec 2016 01:20:00 +0000 Received: from resomta-ch2-18v.sys.comcast.net ([69.252.207.114]) by resqmta-ch2-08v.sys.comcast.net with SMTP id HKfKcJpbKdT7bHKfkcKCvC; Thu, 15 Dec 2016 01:17:24 +0000 X-DKIM-Result: Domain=comcast.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20161114; t=1481764644; bh=HDzYXh0r1D6gvsl5XXq7hSiTEI9bLE/jdEJrmRDd18Q=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=azNlCoH+UybjOXnkNmx9ZIAVQebYx5xoV8ExrxJPkJqrJ0jV15DreyW8Rdq5fkxls KTpcoO8RuDIldWwiDYXiGA95JCE6gQi1utQavCKzhAqkP1aSGWIMkToQpzcdenyk9y yM2I5jrvLN7bHlcaHMNcZ1M5j7aD7yJ+7CwTC6kV7zcTrFmSu2J6uYPV7myvXiV/Q0 qetiZjRA0M3gM+5FDNAx07WhN/bU6wDDdCciLRCXrvFXPdvu6xsnb4x744w41EEEDx 6TywpxSE2hBY4fC1cjygEDif6tf1UeQvgXjF4k/FIiNL3fq0rxuTrnJhzsGrQurOaW D9o1uNyUig0Mw== Received: from Owner ([IPv6:2601:141:0:bec5:d89c:dee6:910b:c990]) by resomta-ch2-18v.sys.comcast.net with SMTP id HKficKWJZk82QHKfjc2vK2; Thu, 15 Dec 2016 01:17:24 +0000 From: To: References: <158ddfd1f0b-5980-42e@webprd-a47.mail.aol.com> <584AC31C.20803@posteo.de> <584EAB0D.4060004@posteo.de> <585142AA.4050106@posteo.de> In-Reply-To: <585142AA.4050106@posteo.de> Date: Wed, 14 Dec 2016 20:17:15 -0500 Message-ID: <041e01d25670$f96a8800$ec3f9800$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQHG3MFEo/oYDIYXYNZeoi44w4DdiQK+PtNRAIyoNXEB5+Yb+qD1kcyw Content-Language: en-us X-CMAE-Envelope: MS4wfFUu8Jv/fpUV25S4C/Z9lKJ1JQ3xCZVE2QFYjeq2eln6dK7GdLWUe1FstR3qA8+ZKck3aTPykxA0oIa6FIfsF61OFofcY+pBQG4m5CPYlR/gDXyAMfZp Ibn3cq3rRSjzep+fqZxdRLFOFRhUnFrA9fU= X-Scan-Signature: 77a0a2f41e380940c0e08c95737baa3b Subject: RE: ULF: Finally 100 mA on 2.97 kHz / 65 km ULF experiment / EbNaut Content-Type: multipart/alternative; boundary="----=_NextPart_000_041F_01D25647.1096C9F0" 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: 9802 This is a multipart message in MIME format. ------=_NextPart_000_041F_01D25647.1096C9F0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Stefan, =20 Congratulations on another great milestone! =20 73, =20 Jim AA5BW =20 From: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of DK7FC Sent: Wednesday, December 14, 2016 8:02 AM To: rsgb_lf_group@blacksheep.org Subject: Re: ULF: Finally 100 mA on 2.97 kHz / 65 km ULF experiment / = EbNaut =20 Hi ULF,=20 My post-processing of the 4 day recording is still running, almost 50% = of the data is shown on the spectrograms now. I'm happy to confirm the successful decode of a 5 character EbNaut = message over 65 km on the 101 km band, with a BIG SNR! It's the one = which started on 08.DEC, 7 UTC. First there was no decode until i found = that i made a mistake, the actual start of the transmission is 6:58:40 = UTC, an offset of -1 symbol. Capture in attachment. I also attach the wav file, if someone wants to = play with it, the size is very small. 73, Stefan Am 12.12.2016 14:50, schrieb DK7FC:=20 Hi ULF,=20 More news from the latest experiment on the 101 km band with QRB ~ 65 = km. Yesterday i have been in = JN39VH41HL again = and took all the equipment of this ULF experiment home again.=20 Everything has still been there and in its right place, which was the = first good message. Here's an image showing the coupling of the loop = antenna, 2 turns primary and about 200 turns secondary on a big ferrite = core: = https://dl.dropboxusercontent.com/u/19882028/ULF/20161211_123535.jpg Even the audio recording process was still running but the USB stick was = almost full. Now i have saved a 29.7 GB raw file containing the audio = data for post processing. This recording is almost 4 days long. 2 = SpecLab instances are now running to produce spectrograms in 424 uHz FFT = bin width and 10 minute per pixel scroll rate, using a noise blanker and = a 4 kHz wide filter centered on 2970 Hz. The accus (5x 7 Ah lead gel) were discharged to 12.17V, = https://dl.dropboxusercontent.com/u/19882028/ULF/20161211_123758.jpg, so = it was the right choice to use these 5 accus. The single turn vertical loop circumference is about 45m out of 1.5mm^2 = cu wire and the captured area is about 70 m^2. Now, while writing this mail, the first pixels are coming in. So far the = result is looking very very good, the SNR seems to be arround 20 dB, = much more than expected! See attachment. I will write a summary when all = the spectrograms and eventual EbNaut decodes are available. But in the = moment it looks most promising that i successfully crossed 65 km = distance on the 101 km band, which was the goal. This is the path: = http://no.nonsense.ee/qth/map.html?qth=3DJN39VH41HL = = &from=3Djn49ik00wd 73, Stefan/DK7FC Am 09.12.2016 15:43, schrieb DK7FC:=20 After doing a lot of modifications here on the TX side, the effect still = exists. I can't get rid of the unstable phase shown on the VLF tree = grabber. One thing to mention is that the phase seems to change slowly, no sudden = phase jumps. Thus the peak is 40 dB S/N in 47 uHz. So obviously there = were much less uncorrected phase glitches than expected in the first = moment when i saw the effect. Just to be sure i downgraded to the last SpecLab version, the one i used = since the last month. But the effect still exists.=20 Next to note is the i never saw the effect in my last tests. I still = have captures showing a very clear trace on 2970 Hz during the 31 km = experiment. OK that was in September. The QRN levels may have been a bit = higher and the signal was 7 dB weaker. So maybe the effect was just = hidden in the noise? Next i found that some SpecLab configurations seem to be corrupted by = forth and back installing old (V2.90b2) and new (V2.92b2) version. So i = am now using the old version and a config file that was never opened in = the new version. It all seems to work fine on the TX side but i can = still see the effect. BTW i even disabled the NB and checked if this = makes a change. But thill the same result. The TX schedule for the experiment is: 07.DEC: TX 2970.000 Hz (antenna current between 105...110 mA all the = time) since 13:30 UTC. The recording has started about 15 UTC. 08.DEC: EbNaut 5ch, 80s, 8K19A @ 2970.000 Hz starting 7 UTC, ending = 18:22:40 UTC. Then, carrier at 2970.000 Hz. Some interruptions happened = in the late carrier. 09.DEC: 0 UTC starting DFCW-10800 (3h per element), 'dit' at 2969.9975 = Hz, 'dah' at 2970.000 Hz. The message is 'FC'. Between F and C there is = a break of 7 hours. In this time, starting 15 UTC: EbNaut 2ch, 68s, = 8K19A @2970.000 Hz. 10.DEC: End of DFCW message 'FC' at 13 UTC. Then, EbNaut 5ch, 80s, 8K19A = @ 2970.000 Hz starting 13 UTC (repetition of the message of 08.DEC.) 11.DEC: End of EbNaut message at 0:22:40 UTC. Then, carrier on 2970.000 = Hz until 20 UTC. The recording will stopp in the late morning, due to = space limitations of the 32 GB USB-stick. >From the local recording i tried to decode the 5ch EbNaut message. But = it didn't decode. I just got a '*****' message and a false decode. This = is strange. The dots are quite concentrated in the two horizontal lines = which indicates a stable phase. See attachment. Also the signal peak is = strong and narrow. But in the red field there is nothing to see... This = EbNaut message was transmitted with the new PSK config in SL. It is the = reason why i will repeat the message in the end of the experiment again, = using the old settings and version. I should have done more pre-tests before starting the experiment. But = now it is running. Well, the main goal is to detect a clear trace of my = signal in a spectrogram running at 300 uHz or so. The signals do not = look bad on the local grabber, not at all, despite the strange = (propagation?) effect. I'm still optimistic... 73, Stefan ------=_NextPart_000_041F_01D25647.1096C9F0 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

Stefan,

 

Congratulations on another great milestone!

 

73,

 

Jim AA5BW

 

From: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of = DK7FC
Sent: Wednesday, December 14, 2016 8:02 = AM
To: rsgb_lf_group@blacksheep.org
Subject: Re: = ULF: Finally 100 mA on 2.97 kHz / 65 km ULF experiment / = EbNaut

 

Hi ULF, =

My post-processing of the 4 day recording is still running, = almost 50% of the data is shown on the spectrograms now.
I'm happy to = confirm the successful decode of a 5 character EbNaut message over 65 = km on the 101 km band, with a BIG SNR! It's the one which started on = 08.DEC, 7 UTC. First there was no decode until i found that i made a = mistake, the actual start of the transmission is 6:58:40 UTC, an offset = of -1 symbol.
Capture in attachment. I also attach the wav file, if = someone wants to play with it, the size is very small.

73, = Stefan


Am 12.12.2016 14:50, schrieb DK7FC:

Hi ULF,

More news from the latest experiment = on the 101 km band with QRB ~ 65 km.
Yesterday i have been in JN39VH41H= L again and took all the equipment of this ULF experiment home = again.
Everything has still been there and in its right place, which = was the first good message. Here's an image showing the coupling of the = loop antenna, 2 turns primary and about 200 turns secondary on a big = ferrite core: https://dl.dropboxusercontent.com/u/19882028/ULF/20161211_123535.jpg=

Even the audio recording process was still running but the = USB stick was almost full. Now i have saved a 29.7 GB raw file = containing the audio data for post processing. This recording is almost = 4 days long. 2 SpecLab instances are now running to produce spectrograms = in 424 uHz FFT bin width and 10 minute per pixel scroll rate, using a = noise blanker and a 4 kHz wide filter centered on 2970 Hz.

The = accus (5x 7 Ah lead gel) were discharged to 12.17V, https://dl.dropboxusercontent.com/u/19882028/ULF/20161211_123758.jpg= , so it was the right choice to use these 5 accus.

The single = turn vertical loop circumference is about 45m out of 1.5mm^2 cu wire and = the captured area is about 70 m^2.

Now, while writing this mail, = the first pixels are coming in. So far the result is looking very very = good, the SNR seems to be arround 20 dB, much more than expected! See = attachment. I will write a summary when all the spectrograms and = eventual EbNaut decodes are available. But in the moment it looks most = promising that i successfully crossed 65 km distance on the 101 km band, = which was the goal. This is the path: http://no.nonsense.ee/qth/map.html?qth=3DJN39VH41HL&from=3D= jn49ik00wd

73, Stefan/DK7FC


Am = 09.12.2016 15:43, schrieb DK7FC:

After doing a lot of modifications here on the TX = side, the effect still exists. I can't get rid of the unstable phase = shown on the VLF tree grabber.

One thing to mention is that the = phase seems to change slowly, no sudden phase jumps. Thus the peak is 40 = dB S/N in 47 uHz. So obviously there were much less uncorrected phase = glitches than expected in the first moment when i saw the = effect.

Just to be sure i downgraded to the last SpecLab version, = the one i used since the last month. But the effect still exists. =

Next to note is the i never saw the effect in my last tests. I = still have captures showing a very clear trace on 2970 Hz during the 31 = km experiment. OK that was in September. The QRN levels may have been a = bit higher and the signal was 7 dB weaker. So maybe the effect was just = hidden in the noise?

Next i found that some SpecLab = configurations seem to be corrupted by forth and back installing old = (V2.90b2) and new (V2.92b2) version. So i am now using the old version = and a config file that was never opened in the new version. It all seems = to work fine on the TX side but i can still see the effect. BTW i even = disabled the NB and checked if this makes a change. But thill the same = result.

The TX schedule for the experiment = is:
07.DEC: TX 2970.000 Hz (antenna current between 105...110 = mA all the time) since 13:30 UTC. The recording has started about 15 = UTC.

08.DEC: EbNaut 5ch, 80s, 8K19A @ 2970.000 Hz starting = 7 UTC, ending 18:22:40 UTC. Then, carrier at 2970.000 Hz. Some = interruptions happened in the late carrier.

09.DEC: 0 UTC = starting DFCW-10800 (3h per element), 'dit' at 2969.9975 Hz, 'dah' = at  2970.000 Hz. The message is 'FC'. Between F and C there is a = break of 7 hours. In this time, starting 15 UTC: EbNaut 2ch, 68s, 8K19A = @2970.000 Hz.

10.DEC: End of DFCW message 'FC' at 13 UTC. = Then, EbNaut 5ch, 80s, 8K19A @ 2970.000 Hz starting 13 UTC (repetition = of the message of 08.DEC.)

11.DEC: End of EbNaut message = at 0:22:40 UTC. Then, carrier on 2970.000 Hz until 20 UTC. The recording = will stopp in the late morning, due to space limitations of the 32 GB = USB-stick.

From the local recording i tried to decode the 5ch = EbNaut message. But it didn't decode. I just got a '*****' message and a = false decode. This is strange. The dots are quite concentrated in the = two horizontal lines which indicates a stable phase. See attachment. = Also the signal peak is strong and narrow. But in the red field there is = nothing to see... This EbNaut message was transmitted with the new PSK = config in SL. It is the reason why i will repeat the message in the end = of the experiment again, using the old settings and version.

I = should have done more pre-tests before starting the experiment. But now = it is running. Well, the main goal is to detect a clear trace of my = signal in a spectrogram running at 300 uHz or so. The signals do not = look bad on the local grabber, not at all, despite the strange = (propagation?) effect. I'm still optimistic...

73, = Stefan

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