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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*VLF\:\s+300\s+mA\s+on\s+8270\s+Hz\s*$/: 25 ]

Total 25 documents matching your query.

1. VLF: 300 mA on 8270 Hz (score: 1)
Author: DK7FC <[email protected]>
Date: Thu, 21 Sep 2017 23:01:55 +0200
VLF, My new VLF coil is now in operation. It is designed to run 300 mA. The first station where i like to transmit some messages is 8270 Hz, just because 36 km it is the easiest band on the VLF frequ
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00119.html (10,842 bytes)

2. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: "Mike Dennison" <[email protected]>
Date: Fri, 22 Sep 2017 10:52:29 +0100
I would certainly like to try to receive you again on VLF, Stefan. But I understand that EbNaut cannot be seen on a spectrogram. Is that correct? I don't have GPS timing (though I expect to have it b
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00126.html (12,039 bytes)

3. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: DK7FC <[email protected]>
Date: Fri, 22 Sep 2017 13:26:43 +0200
Hi Mike, Am 22.09.2017 11:52, schrieb Mike Dennison: I would certainly like to try to receive you again on VLF, Stefan. But I understand that EbNaut cannot be seen on a spectrogram. Is that correct?
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00127.html (13,760 bytes)

4. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: DK7FC <[email protected]>
Date: Sat, 23 Sep 2017 12:41:19 +0200
...Yesterday the transmission went well. Now the transmission/message is repeated daily until the 100 hours are completed or until there are some stations telling the message :-) 73, Stefan Am 21.09.
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00135.html (10,771 bytes)

5. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: DK7FC <[email protected]>
Date: Tue, 26 Sep 2017 00:21:34 +0200
VLF, 4 transmissions were done successfully. Is there someone trying to decode it at all or is it just a lonely test? 12 characters 16K21A is a bit challenging for most computers though. 73, Stefan A
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00161.html (10,548 bytes)

6. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: Jacek Lipkowski <[email protected]>
Date: Tue, 26 Sep 2017 13:23:37 +0200 (CEST)
4 transmissions were done successfully. Is there someone trying to decode it at all or is it just a lonely test? of course people are trying to decode it :) (message sent by email for validation, bu
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00162.html (11,375 bytes)

7. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: DK7FC <[email protected]>
Date: Tue, 26 Sep 2017 13:45:08 +0200
Hello Jacek, Many thanks. I confirm the message is coorrect :-) 920 km distance on a land path. Not so bad :-) Usually my signal is 7.4 dB stronger. So it would have worked in a single day when using
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00163.html (11,980 bytes)

8. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Tue, 26 Sep 2017 11:56:10 +0000
Just got back from a week's camping in Wales on Shell Island. Chatted with a radio ham who was camped nearby, saw his antenna poking up above the sand dunes. My rx runs happily while I'm away - my ho
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00164.html (11,971 bytes)

9. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Tue, 26 Sep 2017 12:12:45 +0000
I've updated the notes on operations, it now has a table at the end showing the performance across a range of codes and message lengths, http://abelian.org/ebnaut/ops.shtml Some of the entries are n
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00165.html (11,142 bytes)

10. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: DK7FC <[email protected]>
Date: Wed, 27 Sep 2017 00:01:25 +0200
Hi Paul, I already expected that you were in holidays. Am 26.09.2017 13:56, schrieb Paul Nicholson: So now there are all these messages to decode... Ah yes I am needed - but only to read the emails a
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00168.html (11,720 bytes)

11. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Wed, 27 Sep 2017 12:15:56 +0000
Ok here's the 5th day added: 2017-09-22: +0.4 dB phase 126.0 list rank 8225; 2017-09-23: +1.6 dB phase 131.0 list rank 0; 2017-09-24: +0.3 dB phase 134.0 list rank 242; 2017-09-25: +2.2 dB phase 127.
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00172.html (11,632 bytes)

12. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: DK7FC <[email protected]>
Date: Wed, 27 Sep 2017 14:34:38 +0200
Hi Paul, Thanks for the 5th day. Am 27.09.2017 14:15, schrieb Paul Nicholson: Ok, but the lower bands will need many days because E-field is not useable. It will take some days until we completed the
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00173.html (10,570 bytes)

13. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: Jacek Lipkowski <[email protected]>
Date: Wed, 27 Sep 2017 19:17:36 +0200 (CEST)
Stefan, could you also send carriers during your experiments? i understand that changing bands requires a trip to the roof, so maybe you could send a 1 day carrier after changing the band. you could
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00177.html (10,581 bytes)

14. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: DK7FC <[email protected]>
Date: Thu, 28 Sep 2017 10:56:24 +0200
Hi Jacek, Yes, sure. Like i did 2 weeks ago on 8270 Hz with the larger coil. I could also do something at night, experimental 1 character messages and so on. Maybe we are already in a range (920 km)
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00179.html (11,876 bytes)

15. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: Markus Vester <[email protected]>
Date: Thu, 28 Sep 2017 05:18:19 -0400
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00180.html (10,673 bytes)

16. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: Jacek Lipkowski <[email protected]>
Date: Thu, 28 Sep 2017 21:47:29 +0200 (CEST)
before QSY, could you perhaps also leave the 8270.005 Hz carrier on air overnight? This would give Bernd DF9RB a chance to test his RX in a 31 uHz spectrogram. and i'm sure others will benefit too,
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00181.html (10,596 bytes)

17. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: DK7FC <[email protected]>
Date: Thu, 28 Sep 2017 22:32:22 +0200
Hi Markus, Jacek, VLF, OK, the carrier is running since 19:35 UTC on 8270.005 Hz and will run until 6 UTC, when the next (3rd) sequence of the 100 character message begins. Good to know there is some
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00182.html (11,290 bytes)

18. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Fri, 29 Sep 2017 11:41:58 +0000
I used Alpha signals to get a rough calibration of the E-field rx and I retrospectively apply this to the recent recordings. Below are the daily results already reported for the 16K21A 12 char messag
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00189.html (11,414 bytes)

19. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: DK7FC <[email protected]>
Date: Sat, 30 Sep 2017 17:13:47 +0200
Hi Paul, Great work! Very interesting. I like to have these techniques too. I'm on the way! Now the 100 char message is almost through, the 4th time. No results so far? I like the idea of stacking me
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00198.html (12,118 bytes)

20. Re: VLF: 300 mA on 8270 Hz (score: 1)
Author: Paul Nicholson <[email protected]>
Date: Sat, 30 Sep 2017 19:59:22 +0000
Decoded "NIEMAND IST MEHR SKLAVE, ALS DER SICH FUER FREI HAELT, OHNE ES ZU SEIN. _ JOHANN WOLFGANG VON GOETHE" List rank 0, Eb/N0 = +0.7 dB with four days stacked. I used a 'known phase' decode, usin
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-09/msg00199.html (11,282 bytes)


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