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Total 13 documents matching your query.

1. ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: DK7FC <[email protected]>; Date: Sun, 04 Dec 2016 23:15:27 +0100; ULF, It was a clear, cold and sunny day again and finally i was testing the new large 2.97 kHz coil on the roof: https://dl.dropboxusercontent.com/u/19882028/ULF/20161204_153126.jpg Not a good idea o; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00081.html (13,276 bytes)
2. Re: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: Paul Nicholson <[email protected]>; Date: Tue, 6 Dec 2016 10:34:21 +0000; I think I should be able to detect 1.2uW without trouble. Using for example, Wait's 1958 simple field strength formula, your 1.2uW should reach Todmorden with Day: 50nV/m or 0.17 fT Night: 40nV/m or; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00097.html (12,379 bytes)
3. Re: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: DK7FC <[email protected]>; Date: Tue, 06 Dec 2016 18:37:44 +0100; Hi Paul, ULF, Most interesting anyway, despite there is no sign of my signal. Yesterday i build an analog amperemeter for AC measurements and calibrated it for a range up to 250 mA at 2970 Hz. I put; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00100.html (14,790 bytes)
4. Re: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: DK7FC <[email protected]>; Date: Tue, 06 Dec 2016 21:37:51 +0100; Am 06.12.2016 11:34, schrieb Paul Nicholson: I think I should be able to detect 1.2uW without trouble. In which bandwidth, or how many transmission hours do you need to integrate in one peak to get a; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00103.html (11,363 bytes)
5. Re: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: DK7FC <[email protected]>; Date: Wed, 07 Dec 2016 12:02:44 +0100; ...the 65 km ULF experiment starts today in JN39VH! A 100mA carrier starts at 14:30:00 UTC. 73, Stefan; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00104.html (11,165 bytes)
6. Re: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: Paul Nicholson <[email protected]>; Date: Wed, 7 Dec 2016 13:50:56 +0000; Nothing significant in the spectrum http://abelian.org/vlf/tmp/161206a.gif About 1uW should give some hint in a hour and very significant peak on an 8 hour spectrum. So something is not adding up. M; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00105.html (12,916 bytes)
7. Re: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: DK7FC <[email protected]>; Date: Thu, 08 Dec 2016 00:37:26 +0100; Hi Paul, Am 07.12.2016 14:50, schrieb Paul Nicholson: About 1uW should give some hint in a hour and very significant peak on an 8 hour spectrum. I run a constant carrier from 13:30...7:00 UTC. On 7 U; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00110.html (14,584 bytes)
8. Re: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: Markus Vester <[email protected]>; Date: Thu, 8 Dec 2016 05:31:43 -0500; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00112.html (14,917 bytes)
9. Re: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: DK7FC <[email protected]>; Date: Mon, 12 Dec 2016 15:06:25 +0100; Hi Paul, FYI, it still looks like the changing phase on the spectrograms of the tree are not caused by instabilities on the transmitter site. Since yesterday (11.DEC) 0:22:40 UTC i'm running an unmod; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00152.html (15,229 bytes)
10. RE: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: <[email protected]>; Date: Mon, 12 Dec 2016 11:16:48 -0500; Stefan, Congratulations on your ~20dB SNR at 65 km, 2970 Hz, that is quite a landmark supported by hard work. You mentioned that the phase changes at 65 km do not seem to be from the transmitter, and; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00155.html (16,901 bytes)
11. Re: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: DK7FC <[email protected]>; Date: Mon, 12 Dec 2016 18:31:37 +0100; Hello Jim, ULF, Am 12.12.2016 17:16, schrieb [email protected]: Congratulations on your ~20dB SNR at 65 km, 2970 Hz, that is quite a landmark supported by hard work. Many thanks. You mentioned tha; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00156.html (14,699 bytes)
12. RE: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: <[email protected]>; Date: Mon, 12 Dec 2016 19:13:51 -0500; Hello Stefan, Your data becomes more fascinating with each update. From the .jpg image that you attached, it seems like the phase changes at the 3.5 km site are not from SNR and probably not from sim; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00159.html (16,623 bytes)
13. Re: ULF: Finally 100 mA on 2.97 kHz (score: 1): Author: DK7FC <[email protected]>; Date: Wed, 14 Dec 2016 20:06:37 +0100; Hello Jim, ULF, Am 13.12.2016 01:13, schrieb [email protected]: If you have ruled out phase jumps from corona (which I think you did rule out) Today i did. I sent an unmodulated carrier from 10:30; /rsgb_lf_group-archives/html/rsgb_lf_group/2016-12/msg00170.html (13,513 bytes)

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