|Subject:||Re: VLF: DK7FC close to SAQ|
|From:||Markus Vester <[email protected]>|
|Date:||Sun, 26 Nov 2017 09:59:36 -0500|
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Yeah it's there! More than 20 dB SNR at DL0AO: http://df6nm.bplaced.net/dl0ao/VLFgrabber/vlfgrabber_dl0ao_test.htm
73, Markus (DF6NM)
Von: DK7FC <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: So, 26. Nov 2017 0:42
Betreff: VLF: DK7FC close to SAQ
Since 23 UTC a 700 mA carrier is running on 17.4701 kHz!
It is a little surprise to the VLF community i think ;-)
Legal? Yes: http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/17,47kHz_Sonderlizenz.jpg
Actually the document has 3 pages but the other ones are no so relevant.
My ERP is limited to 5 mW. I did not request more because more isn't possible anyway with this antenna.
I wound a big single layer coil with 0.5 mm enameled wire on a PVC tube with 315 mm outher diameter.
0.7 A is just a first careful step. The coil is designed to hold 1.5 A 'key down'.
The carrier will run the whole night and even tomorrow at daytime.
Worldwide reports are welcome ;-)
It is not sub-9-kHz but still VLF, the 17 km band!! So give it chance :-)
The tree has still some solar power to stream the signal from the EW loop down to the city, so there is a feedback spectrogram at
PS: I still can hear that tone of the coil. It is terrible! Be happy when you are older than me!
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