Got some pixels at the right place in the 47uHz spectrogram at 100 minutes per pixel
The 179uHz spectrogram at the end of the page is also showing something. But a lot of imagination is needed
linking the pixels with a line and discovering Stefan’s constellation ;-)
73 de Luis
De: [email protected] [mailto:[email protected]]
En nombre de Markus Vester
Enviado el: miércoles, 29 de noviembre de 2017 11:11
Para: [email protected]
Asunto: Re: VLF: DK7FC close to SAQ
Attached is a plot from the DL0AO cardioid, showing yesterday's diurnal amplitude and phase changes. Good traces are also continuously
visible on the G3ZJO and DF6NM VLF-grabbers. Hope that someone from America or Russia may also be attempting to pick up the signal.
Von: DK7FC <[email protected]>
An: rsgb_lf_group <[email protected]>
Verschickt: Mo, 27. Nov 2017 10:37
Betreff: Re: VLF: DK7FC close to SAQ
thanks for the feedback. Wonderful, now it is 30 dB in 424 uHz. DL0AO could run a 3.8 mHz '600' RDF spectrogram and a phase and signal level plot, so we could see propagation effects much better.
You could already see QRSS-60 from me! I will try that soon.
The carrier is still on the air. It will run the whole day and night...
Am 26.11.2017 15:59, schrieb Markus Vester:
Since 23 UTC a 700 mA carrier is running on 17.4701 kHz!
It is a little surprise to the VLF community i think ;-)
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!