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Re: LF: noise on VK and earth dipole tests

To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: noise on VK and earth dipole tests
From: John Rabson <john.rabson@numeo.fr>
Date: Sat, 15 Oct 2011 18:43:46 +0200
In-reply-to: <4E997913.8090104@iup.uni-heidelberg.de>
References: <CAKvcm2d-GA=EajQfQCS54WncqBsFwA5GjpgQpuPcjrtP_rePag@mail.gmail.com> <4E956D89.6080102@iup.uni-heidelberg.de> <CAKvcm2dLYx4_raGoTnAJL-xxLZEEmGStcJHhv8QduMxkxShD1Q@mail.gmail.com> <4E97032B.30905@iup.uni-heidelberg.de> <CAKvcm2fe9sMFhQb30jigmzi+_Cw8k31iSDLOFY7n2x3J0a9ODg@mail.gmail.com> <4E997913.8090104@iup.uni-heidelberg.de>
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On 15 Oct 2011, at 14:14CEST, Stefan Schäfer wrote:

> Hello Dimitris,
> 
> I think the 450 Ohm you get is mostly caused by the earth electrode 
> resistance. So if you spend e.g. 2 instead of one earth rod, maybe you can 
> get a 3 dB improvement?

The more the better up to 6 or 7 rods.
From cave radio tests we find that the earth rods need to be spaced by 2 or 
more times their depth.

John F5VLF




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