Re: LF: noise on VK and earth dipole tests

[Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>]

Hi John,

Yes, the more the better.
If it is just one rod and the overall losses would be 450 Ohm, i expect 
a high ground conductivity which would be worse for an earth antenna... 
Maybe the elevated wire in the forest is the best (and long lasting) 
antenna system for /p. Then it must be a closed loop (and Scott and 
others use) or a looong earth antenna or just a full size dipole, lossy 
but full size :-) Some dry old and tall trees would be excellent, even 
as an insulator ;-)
73, Stefan

Am 15.10.2011 18:43, schrieb John Rabson:
> 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
>
>
>
>