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| Subject: | Re: VLF: First VLF detection DL > EA |
| From: | DK7FC <[email protected]> |
| Date: | Mon, 04 Dec 2017 16:13:26 +0100 |
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Hi Paul, VLF, Thanks.I think we will have a good chance to transfer a message over that path. We will try that soon. Yesterday the TX went off the air in the afternoon and it was off during the night. Now it is on air again since 15:12 UTC, after playing a bit in DFCW-90, see the capture from the DL0AO grabber :-) That's a challenge: Try to display that DFCW-message. Can you read it on your side? I prepared a modified band filter which is in front of the noise blanker, see the other attachment. Since we have to deal with JXN/16.4 kHz and HWU/18.3 kHz inside the 3 kHz band filter, it may be helpful to notch them out. This can be done manually (by hand) in SpecLab. You can see the result in the spectrogram obove. You can even see that the sferics are better rejected after lowering the MSK transmitter peaks... 73, Stefan Am 03.12.2017 17:02, schrieb Paul Nicholson: I've added this to the ever-growing list of VLF milestones that I keep at http://abelian.org/vlf/amateur-radio/ Well done to Luis for this success in what seems to be quite a difficult band. -- Paul Nicholson --
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