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Re: LF: Re: 137 kHz WSPR-2 on a 900m long ground loop, this weekend

from [DK7FC] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: Re: 137 kHz WSPR-2 on a 900m long ground loop, this weekend
From: DK7FC <[email protected]>
Date: Tue, 11 Sep 2018 16:54:23 +0200
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LF/VLF/ULF,

Another thing to report. With the scope i took some spectra showing the signal amplitudes of strong LF and VLF stations. The 900m long antenna (grounded ends) was simply connected to the probe of the scope. Maybe not the best resolution but it gives an idea of the signal voltages measured at the feed point. A connected sound card would have to deal with these voltages. The strongest signal is at about 180 kHz, obviously Europe1,a carrier and AM sidebands are visible.
I'll try to receive ZEVS and the Schumanns from that antena soon.
Spectra captures attached.

73, Stefan

Attachment: 100kHz.PNG
Description: PNG image

Attachment: 500kHz.PNG
Description: PNG image

Attachment: 1MHz.PNG
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Attachment: 10MHz.PNG
Description: PNG image

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