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21. Re: LF: Cooperative ionosphere effects (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Sat, 20 Mar 2010 15:38:12 +0000 (GMT)
Anyway this power is much lower the power needed to observe 'normal whistler' man-generated. Reason is simple: requred energy 'expanded' in time. Seems factor should be ~10^4 or more? Regards, Alexan
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00126.html (11,034 bytes)

22. VLF: yet another kite-ant design (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Tue, 9 Mar 2010 23:59:40 +0000 (GMT)
Dear LF, let's describe yet another kite-ant design for 9 kHz. Let it be trianle loop elevated by a kite up to 100m. Base of triangle (parallel to earth) assumed as 200m, height -- 100m, wire -- 2mm
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00129.html (10,341 bytes)

23. Re: LF: KITE ANT (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Wed, 10 Mar 2010 00:35:40 +0000 (GMT)
HAM communications should NOT be reliable communications, Mal. Certanly for professional communications this is very funny idea. But we are about HAMing. This is PLAY, but it is a nice play:-) Regard
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00162.html (9,469 bytes)

24. Re: LF: Ionospheric VLF propagation (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Wed, 17 Mar 2010 12:57:10 +0000 (GMT)
It is one point yet. Let's wait for 3-4 at least. True, true. I am familar with such problems but mainly in condensed matter (particulary magneto-optics) not in plasma physics. But electrodynamics it
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00252.html (11,859 bytes)

25. LF: Cooperative ionosphere effects (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Sat, 20 Mar 2010 08:38:39 +0000 (GMT)
Paul, can you give a reference (http is better, say arxive.org) to some review paper on cooperative effects in ionosphere? What does it mean? You mentioned 'cooperative D-layer' before. But i have ne
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00256.html (10,690 bytes)

26. Re: LF: Cooperative ionosphere effects (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Sat, 20 Mar 2010 13:54:54 +0000 (GMT)
OK. I had misunderstand you. Certanly it will be good if amateurs cooperate with researchers. It seems to me vlf (or may be lf at least) is the only area where HAM's experiments can have some reseach
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00258.html (11,895 bytes)

27. Re: LF: RE: for W1VLF (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Mon, 29 Mar 2010 11:17:04 +0000 (GMT)
I sent mail to this address tomorow. I don't get rejection msg, this is why i expect this adr is OK. Have you got a mail? Regards, Alexander
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00398.html (10,806 bytes)

28. Re: AW: LF: 8.97kHz antennas (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Tue, 16 Mar 2010 23:01:38 +0000 (GMT)
No, Stefan. You forgot P ~ E^2, not P ~ E. Thus if you get ERP 3 dB higher then distance will be 2 (not 4) times more. Regards, Alexander/RA9MB
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00433.html (10,497 bytes)

29. Re: AW: LF: VLF TX experiments_short report (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Thu, 4 Mar 2010 00:30:41 +0000 (GMT)
Anyway this is a new record on 9 kHz:-) Congadulations! Remember, this is well out of near reactive zone. Thus field decreases as 1/D and if you increase voltage to 20 kV then distance will be 20:1.6
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00452.html (10,665 bytes)

30. Re: AW: AW: LF: VLF TX experiments_short report (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Thu, 4 Mar 2010 03:02:50 +0000 (GMT)
Oh, sorry. I undestand that there was some signal but decode nothing. This is a mistake. 1.3 uV/m seems to yeld some weak trace in long QRSS. Somthing with rx part or noise is higher then we expected
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00485.html (9,738 bytes)

31. Re: LF: Ionospheric VLF propagation (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Tue, 16 Mar 2010 22:58:15 +0000 (GMT)
Certanly exponential factor exp(-r/a) should be present. I mentioned this before. But i have no ideas how to estimate roughly (at least) parameter (length) a. Intuitively i expect a = few of 1000s km
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00486.html (10,857 bytes)

32. Re: LF: Ionospheric VLF propagation (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Tue, 16 Mar 2010 05:46:41 +0000 (GMT)
Dear Markus, your calculations are fully adequate only while ionosphere does not work. I.e. for less then about 100 km (very approximative). At 180 km and 800 km ionosphere influence is certanly wort
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00490.html (9,867 bytes)

33. LF: for W1VLF (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Sun, 28 Mar 2010 15:34:11 +0000 (GMT)
Paul, do you have another mail adress? I can't sent you a mail. Today attemp was unsucsessful again. Regards, Alexander
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00515.html (11,049 bytes)

34. Re: AW: AW: LF: 8.97kHz antennas (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Tue, 16 Mar 2010 23:26:12 +0000 (GMT)
To decrease frequency seems not good idea on my opinion. Noise decreases but radiation should decreases much more. This is intuitivelly but. Regards, Alexander
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00517.html (10,181 bytes)

35. Re: LF: DK7FC's 2nd VLF TX test... (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Mon, 15 Mar 2010 19:59:50 +0000 (GMT)
Paul, QRSS10 dots means 10 sec radiation then 10 sec pause. Then again 10 sec radiation and so on. I expect when signal was not broaded at the begining it was Stefan's tuning. After 16:30 as Markus m
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00526.html (11,445 bytes)

36. LF: for W1VLF (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Sun, 21 Mar 2010 05:03:44 +0000 (GMT)
Dear Paul, i tried send answer to your mail but it is unsecessfuly. Mail rejected i din't know why. Someone wrong with your mail box? Just now i leave my home and i'll be offline for a week or so. I'
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00537.html (10,527 bytes)

37. Re: LF: Cooperative ionosphere effects (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Sat, 20 Mar 2010 15:26:49 +0000 (GMT)
By the way one can imagine some 'reverse whistler' if TX radiate apropriate FM signal which is 'de-chirped' by dispersion in ionosphere. Can you roughly estimate radiated power needed to observe such
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00567.html (11,355 bytes)

38. Re: LF: Possible VLF HV problems, or not? (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Wed, 10 Mar 2010 00:12:37 +0000 (GMT)
Dear Stefan, there was no such a problem (seems to me) in Markus experiment with 10kV. May by with 20kV... But anyway corona protected rings (rather small i think) to be usefull on the ends of wire.
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00568.html (11,325 bytes)

39. Re: LF: DK7FC's 2nd VLF TX test... (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Mon, 15 Mar 2010 18:20:10 +0000 (GMT)
(JMarkus, you got Stefan's sigs in QRSS10, not in QRSS100?? True? Wow! (B (JOn Mon, 15 Mar 2010, Markus Vester wrote: (B (J> (B (J> talked to Stefan on the cellphone about an hour ago. You can imagin
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00576.html (11,801 bytes)

40. Re: LF: DK7FC's 2nd VLF TX test... (score: 1)
Author: "Alexander S. Yurkov" <[email protected]>
Date: Mon, 15 Mar 2010 20:21:48 +0000 (GMT)
Such scepticist you are, Mal. Any data can be analysed. By the way frquency is some ID by itself. And certanly we are looking for more proof. Regards, Alexander
/rsgb_lf_group-archives/html/rsgb_lf_group/2010-03/msg00586.html (11,952 bytes)


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