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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*VLF\:\s+EbNaut\s+transmission\s+on\s+8270\.1\s+Hz\s+again\s+and\s+again\s*$/: 13 ]

Total 13 documents matching your query.

1. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: DK7FC <>
Date: Fri, 29 Apr 2016 17:37:29 +0200
Hi VLF, Now, Paul, that's your ultimative challenge: f = 8270.1 Hz Start: 29.04.2016  16:00:02 Period: 40 Length: 45 (!) Duration: 27 hours, 1 minute, 20 seconds Antenna current: 260 mA CRC 16 8K19A
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-04/msg00390.html (10,816 bytes)

2. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: Markus Vester <>
Date: Fri, 29 Apr 2016 14:54:51 -0400
So 27 hours will not be easy. Wonder whether it is possible to predict the phase change at dawn / dusk, and approximately remove it in a preoprocessing step? All the best, Markus --Ursprüngliche Mit
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-04/msg00394.html (12,649 bytes)

3. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: Paul Nicholson <>
Date: Fri, 29 Apr 2016 20:21:45 +0000
Indeed, four terminators to cope with. Half the message will have daytime phase and half night time phase and a mess in between. No chance of a decode if day and night phase differs by more than 90
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-04/msg00397.html (11,550 bytes)

4. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: DK7FC <>
Date: Fri, 29 Apr 2016 22:43:26 +0200
Hi Paul, Yes, it will be interesting. Just 4 hours are gone now, i can't await it! ;-) What about the phase of DHO38, is it useful to get a rough idea about the phase changes? For slower modes (takin
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-04/msg00399.html (12,980 bytes)

5. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: Paul Nicholson <>
Date: Sat, 30 Apr 2016 11:27:11 +0000
20 hours now, and I ran LWPC which predicts only a 35 degree phase change between day and night. If that works out, then I won't need to do any elaborate diurnal phase compensation, it is well withi
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-04/msg00413.html (11,657 bytes)

6. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: Paul Nicholson <>
Date: Sat, 30 Apr 2016 19:21:58 +0000
I was impatient, with still 5549.6 seconds left to go I decoded the message easily, 'CQ CQ DREAMERS BAND DE DK7FC IN JN49IK PSE KK' Carrier S/N: 25.03 dB in 10.3 uHz Eb/N0 = 0.1dB with constant refer
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-04/msg00417.html (11,641 bytes)

7. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: Markus Vester <>
Date: Sat, 30 Apr 2016 16:23:39 -0400
Paul, Stefan, great, congratulations both! Strange that according to Stefan's forest grabber the PSK transmission was carrying on long after the scheduled end of sequence (19:01:22 ?). Will now attem
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-04/msg00418.html (12,405 bytes)

8. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: Markus Vester <>
Date: Sat, 30 Apr 2016 17:10:33 -0400
After a few minutes worth of notebook sweat, unfortunately no decode here. The wav is at http://df6nm.bplaced.net/VLF/fec_tests/join_160429_1600.wav (513 kB), and the (empty) log file at http://df6nm
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-04/msg00419.html (13,476 bytes)

9. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: DK7FC <>
Date: Sun, 01 May 2016 02:11:04 +0200
Hello Paul, Markus, VLF, Paul, my congrats to the good result. I think it is not necessary to confirm that the message is correct :-) So the diurnal phase changes are uncritical on our path? Or could
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-05/msg00000.html (11,428 bytes)

10. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: Paul Nicholson <>
Date: Sun, 1 May 2016 05:51:14 +0000
After the full message duration had elapsed, Eb/N0 came to +1.6 dB, Phase: 180 180 150 150 Carrier S/N: 24.96 dB in 10.3 uH Were the last 3 hours corrupted? Without signal, the decoder pads with zero
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-05/msg00001.html (9,334 bytes)

11. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: DK7FC <>
Date: Sun, 01 May 2016 09:41:05 +0200
Hi Paul, VLF, Fine, a nice result! There's not so much margin left. What would hve been the shortest symbol length to get a decode on your side? And can you tell something about the signal stability?
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-05/msg00002.html (10,932 bytes)

12. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: Markus Vester <>
Date: Sun, 1 May 2016 03:54:43 -0400
Hi Stefan, aah, yes: The pattern in the spectrogram indeed shows that the little "clown's face" structure is actually being repeated in the last part. So the scheduled re-opening of psk.txt after 24
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-05/msg00003.html (14,341 bytes)

13. Re: VLF: EbNaut transmission on 8270.1 Hz again and again (score: 1)
Author: Paul Nicholson <>
Date: Sun, 1 May 2016 11:34:18 +0000
Error map from Stefan's long transmission, http://abelian.org/vlf/tmp/160429a.gif Each red line indicates a bit error. I can use this recording to try the suggestion by Markus to apply some sort of g
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-05/msg00007.html (10,358 bytes)


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