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Re: LF: ELF communications ?

from [Warren Ziegler] [Permanent Link][Original]
To: rsgb_lf_group <[email protected]>
Subject: Re: LF: ELF communications ?
From: Warren Ziegler <[email protected]>
Date: Thu, 9 Oct 2014 10:12:30 -0400
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Stefan,

   Let us know the result! 
The U.S. Navy had a facility at Clam Lake Wisconsin using 3 MW and a 45km long antenna they achieved 8W ERP at 76Hz, see more at:

73 Warren


On Thu, Oct 9, 2014 at 8:48 AM, DK7FC <[email protected]> wrote:
Hi ELF,

This afternoon i'm attempting to transmit on my INV-L on 136.172 Hz (not kHz!). Just preparing my H bridge VLF PA and i intend to use an old 10 kV transformer which i got from an old furnance (to inflame the oil stream), see https://dl.dropboxusercontent.com/u/19882028/VLF/10kV%20Trafo.jpg

Will that work on 2.4 km distance? It's well inside the near field. Which mode could be possible? QRSS-3? CW?
The 2200000 m band, or 2.2 Mm band :-) A near field of 350 km !!
I hope i can apply 10 kV to the antenna. It will not be resonated. And maybe i will see harmonics as well, because the input is rectangular...

73, Stefan/DK7FC




--
73 Warren K2ORS
                WD2XGJ
                WD2XSH/23
                WE2XEB/2
                WE2XGR/1

 
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