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Total 63 documents matching your query.

21. Re: LF: 29.7 kHz (score: 1)
Author: Peter <[email protected]>
Date: Sun, 3 Jan 2016 10:32:41 +0100
30° 58.356'N 35° 05.894'E On 03.01.2016 01:33, Laurence wrote: ... This put its on a line with near Israel, Eastern Cyprus, Turkey, Russia....given the strength Im thinking more likely the more South
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-01/msg00029.html (8,714 bytes)

22. Re: LF: EbNaut from Todmorden (score: 1)
Author: Peter <[email protected]>
Date: Thu, 17 Mar 2016 20:01:42 +0100
Paul! You wrote: ... I dug the big toroid out. It has two windings, 400 turns giving 0.98H and 10 turns of 2cm wide copper strip for 395 uH. So about 6.17uH/turns^2. At 8270Hz 2.44V in gives 101.6V o
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-03/msg00252.html (11,538 bytes)

23. Re: LF: TXing on VLF again, Iron powder cores... broomstick coil? (score: 1)
Author: Peter <[email protected]>
Date: Tue, 19 Apr 2016 16:45:26 +0200
Hi Markus et al. Measured both at 10kHz. Toroids, green/blue : 91 nH/nē Sleeves, red : 4406 nH/nē 73 de df3lp, Peter
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-04/msg00251.html (9,935 bytes)

24. LF: OT: Racal vra549c Tuner (score: 1)
Author: Peter <[email protected]>
Date: Tue, 28 Jun 2016 22:14:56 +0200
Hi All, Off topic: I need some info about the Racal vra549c antenna tuner. All I have is the schematic: http://lf-radio.de/misc/sw/Racal_vra549c_schem.png I'm looking for the values of those 3 capaci
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-06/msg00104.html (8,573 bytes)

25. Re: LF: OT: Racal vra549c Tuner (score: 1)
Author: Peter <[email protected]>
Date: Wed, 29 Jun 2016 16:39:01 +0200
Thanks Andy! This helps a lot. On 28.06.2016 23:15, Andy wrote: ... The main inductors and capacitors use the same configuration, except that a bank of inductors has a separate bypass to reduce stray
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-06/msg00115.html (9,323 bytes)

26. Re: LF: SAQ statistics (score: 1)
Author: Peter <[email protected]>
Date: Wed, 13 Jul 2016 19:54:57 +0200
Hi, Why is there such a low number of *reports* from UK receiving SAQ ? Peter PS: http://lf-radio.de/misc/SAQ/SAQ_1998.wav
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-07/msg00053.html (9,844 bytes)

27. Re: LF: SAQ statistics (score: 1)
Author: Peter <[email protected]>
Date: Thu, 14 Jul 2016 21:36:37 +0200
Hi, Anyone out there who can falsify the hypothesis that SAQ was active today (2016-07-14) around 1720 utc? Peter
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-07/msg00064.html (9,520 bytes)

28. LF: VLF DHO38 (score: 1)
Author: Peter <[email protected]>
Date: Tue, 30 Aug 2016 18:26:16 +0200
Hi, DHO38 was/is active on 16.4, 18.4, 23.4 and 34.9 kHz today. Temporary simultaneously on 2 frequencies. 73 de df3lp, Peter
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-08/msg00166.html (7,782 bytes)

29. Re: LF: VLF DHO38 (score: 1)
Author: Peter <[email protected]>
Date: Tue, 30 Aug 2016 21:47:32 +0200
Moin Thomas, What about the fieldstrenghts compared with normal service? See: http://lf-radio.de/cgi-bin/test/show_wf.cgi?date=16-08-30 Vertical dipole 2x70cm, INA111 pre-amp, Cirrus-Audio, Raspberry
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-08/msg00168.html (9,038 bytes)

30. Re: LF: VLF DHO38 (score: 1)
Author: Peter <[email protected]>
Date: Thu, 1 Sep 2016 12:51:05 +0200
Hi, Maybe I found an explanation for the odd behaviour of DHO38. There was an explicit RFP for replacement of 8 old valve tx by new ones in semiconductor technology. Location: "VLF MSK Broadcast Radi
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-09/msg00005.html (8,773 bytes)

31. Re: VLF: NPM over the pole (score: 1)
Author: Peter <[email protected]>
Date: Wed, 5 Oct 2016 20:47:56 +0200
Moin Markus, Thanks for that hint! Ebino, Japan, 22.2 kHz, is observable as well. See: http://lf-radio.de/cgi-bin/test/show_wf.cgi?date=16-10-04 73 de df3lp, Peter
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-10/msg00064.html (8,584 bytes)

32. LF: ping! (score: 1)
Author: Peter <[email protected]>
Date: Sat, 15 Oct 2016 20:26:30 +0200
This is a test since I've got: "SMTP error from remote server for GREETING command, host: relay1.thorcom.net (195.171.43.32) reason: 550 Administrative prohibition" ??? Peter
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-10/msg00203.html (7,827 bytes)

33. Re: LF: Smart noise cancelling?!? (score: 1)
Author: Peter <[email protected]>
Date: Thu, 3 Nov 2016 18:55:01 +0100
Hi Stefan et al., Running an experimental receiver at VLF/LF for SID-detection (on RPi 3) I chose an almost non-parametric procedure running in frequency domain. It works as follows: Do a windowed FF
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-11/msg00047.html (11,655 bytes)

34. Re: LF: RFI noise at 144 kHz exactly (score: 1)
Author: Peter <[email protected]>
Date: Mon, 28 Nov 2016 18:12:51 +0100
Hi John, On 28.11.2016 11:52, John Rabson wrote: ... but this morning the signal on 145 kHz is no longer there. What I have noticed is that there is now an RTTY signal on 147 kHz ... DDH47 from Pinne
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-11/msg00276.html (10,112 bytes)

35. Re: LF: ULF experiment: A MEchanical Based Antenna (score: 1)
Author: Peter <[email protected]>
Date: Wed, 21 Dec 2016 16:15:23 +0100
Hi Rik et al., Citation from the announcement: "AMEBA takes a radically different approach from traditional electrical current based transmitter antennas. A baseline implementation employs electrets
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00251.html (12,867 bytes)

36. Re: LF: bouncing posts (score: 1)
Author: Peter <[email protected]>
Date: Thu, 29 Dec 2016 19:11:20 +0100
Hi, 52° 13' 21" N 02° 11' 58" W 73 de df3lp, Peter
/rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00359.html (8,934 bytes)

37. Re: LF: Raspberry Pi sound interface that works (score: 1)
Author: Peter <[email protected]>
Date: Tue, 14 Feb 2017 19:07:19 +0100
Hi Paul, USB audio on the Raspberry Pi is pretty useless thanks to lost USB packets. ... Confirmed. Unfortunately the Wolfson never worked with the quad core RPi. I'm running an experimental remote r
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-02/msg00132.html (11,236 bytes)

38. Re: LF: 50 kHz signal (score: 1)
Author: Peter <[email protected]>
Date: Mon, 13 Mar 2017 17:05:07 +0100
Hi Edgar, Tnx fer observation! See: http://lf-radio.org/cgi-bin/test/plot_channel.cgi?date=17-03-12&freq=54.0KHz Location: 26°19'4"N 127°50'44"E NDI is a reliable indicator for the state of the propa
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-03/msg00112.html (9,402 bytes)

39. Re: LF: VLF Staircase (score: 1)
Author: Peter <[email protected]>
Date: Thu, 16 Mar 2017 18:03:30 +0100
Hi Eddie, VLF Staricase today started around noon UTC, 11kHz approx rising above 15kHz. Confirming up to 29 kHz. See: http://lf-radio.org/cgi-bin/test/show_wf.cgi?date=17-03-16 Not me, since I killed
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-03/msg00121.html (8,746 bytes)

40. LF: VLF Transmissions from Spacecraft (score: 1)
Author: Peter <[email protected]>
Date: Thu, 18 May 2017 19:45:51 +0200
FYI: The "DSX" satellite will carry a 0.5-0.9 kw, 3 to 50 kHz (pulsed?) VLF transmitter. Citation from: www.dtic.mil/dtic/tr/fulltext/u2/a531813.pdf : "...and a two week high-power VLF transmission c
/rsgb_lf_group-archives/html/rsgb_lf_group/2017-05/msg00162.html (8,409 bytes)

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