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Date: Tue, 5 Mar 2019 22:03:09 +0100 (CET)
From: Jacek Lipkowski <sq5bpf@lipkowski.org>
To: rsgb_lf_group@blacksheep.org
Subject: Re: ELF: Almost touching the ground... | 12.47 Hz
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Content preview: Stefan, did you try contacting any geophysisists in your area?
Maybe they have an ULF receiver, and could give you access to the data jacek
On Tue, 5 Mar 2019, DK7FC wrote:
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Stefan, did you try contacting any geophysisists in your area? Maybe they
have an ULF receiver, and could give you access to the data
jacek
On Tue, 5 Mar 2019, DK7FC wrote:
> Date: Tue, 05 Mar 2019 19:44:42 +0100
> From: DK7FC <selberdenken@posteo.de>
> Reply-To: rsgb_lf_group@blacksheep.org
> To: rsgb_lf_group@blacksheep.org
> Subject: ELF: Almost touching the ground... | 12.47 Hz
>
> Hi ELF friends,
>
> During the last 2 weeks i've done another experiment on ELF, this time on
> 12.47 Hz, the 24 Mm band (wavelength 24057 km). Again i've crossed the local
> distance of 3.5 km. That's the lowest frequency i've ever been and it feels
> like i can see the ground already :-)
> The dimensions of everything down there are extreme. I've integrated 227
> hours of a carrier transmission into one spectrum peak, it is shown in the
> attachment in 1.25 uHz. This carrier could have transferred an EbNaut message
> of nearly 100 characters.
>
> The ERP was 50 attowatt or -163 dBW and the antenna current was 170 uA only,
> despite about 5 kV antenna voltage.
>
> I'm now trying to put a step below 10 Hz but the RX antenna becomes less
> efficient with each Hz.
>
> 73, Stefan
>