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1. LF: 17.8 kHz ? (score: 1): Author: Stefan Schäfer <[email protected]>; Date: Sun, 23 Jan 2011 18:16:52 +0100; VLF, There is a strange trace at 17.8 kHz that appears rather weak on my grabber but very strong on the TF3HZ VLF grabber. What is it? Any ideas? 73, Stefan/DK7FC; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-01/msg01044.html (8,065 bytes)
2. Re: LF: 17.8 kHz ? (score: 1): Author: "Markus Vester" <[email protected]>; Date: Sun, 23 Jan 2011 19:13:32 +0100; Stefan, this is interesting. Signal was visible here 16:30 to 17:00 UT, and consists of two tones at +- 25 Hz plus some weaker modulation continuum. Google finds a reference to Tacamo (military airbo; /rsgb_lf_group-archives/html/rsgb_lf_group/2011-01/msg01143.html (10,304 bytes)

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