One lambda - isn't that in the near field!
Mike, G3XDV
> Oh, maybe you're right. The spectrogram is in 45 mHz and 5 s/pix
> scroll rate. Attached is the recording in 11 mHz and 30 s/pix, see the
> long-term average graph, red. No noise blanking was used in all
> spectrograms. 60 Hz, or Lambda= 5000 km. So the distance is just about
> 1 Lambda! :-) I call it DX :-) What may be the best time for that band
> on that path?
>
> 73, Stefan
>
> Am 26.10.2014 01:32, schrieb Markus Vester:
> > Hi Stefan,
> > very nice result! Your spectrogram also contains 60 Hz from America,
> > not too conspicuous but easily visible with a little visual
> > averaging.
> > 73, Markus (DF6NM)
> >
> >
> > -----Ursprüngliche Mitteilung-----
> > Von: DK7FC <[email protected]>
> > An: rsgb_lf_group <[email protected]>
> > Verschickt: Sa, 25 Okt 2014 9:34 pm
> > Betreff: Re: LF: Re: Schumann in my garden, final circuit design
> >
> > Hi ELF friends,
> >
> > Just for those who are interested...
> > I have now finished my modifications to the ELF RX / preamp design
> > for a long wire (E field) antenna. This is the final schematic
> > https://dl.dropboxusercontent.com/u/19882028/VLF/DK7FC%20ELF%20RX%20
> > schematic.jpg. Despite the low frequency, it is improtant to use
> > goos shielding in a metallic box. This is how it looks here:
> > https://dl.dropboxusercontent.com/u/19882028/VLF/DK7FC%20ELF%20RX.jp
> > g
> >
> > I've been in the garden today again and recorded the ELF spectrum
> > (file:
> > https://dl.dropboxusercontent.com/u/19882028/VLF/VLF%20Garten%20in%2
> > 0T%20Antenne25102014_1st.WAV (584 MB)). Unfortunately ZEVS was off
> > the air during that time but i got SNR of Schumann resonances again
> > and very low man made noise and design noise. Spectrogram:
> > https://dl.dropboxusercontent.com/u/19882028/VLF/Schumann%20resonanc
> > es%20on%20final%20design.png
> >
> > Soon i will do another attempt to trynsmit in the ELF range to
> > detect my signal in 2.4 km distance...
> >
> > 73, Stefan/DK7FC
>
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