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Date: Fri, 19 Aug 2011 22:07:37 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: Re: Ferrite Receive Antennas
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Hello Peter,

Thanks for the link, very interesting and relating to the current=20
discussion :-) I expect many of us are reading the dissertation right=20
now ;-)

Especially fig. 5-16 on page 139 is interesting. Downscaling to a =B5r of=
=20
400 (in my case) is required but anyway the trend/dependency is useful=20
to see.
Anyway, both, the diameter and length is useful to improve the SNR. But=20
for my /p antenna, making the rod much longer than it currently is (=3D28=
=20
cm) makes not much sense if the goal is an antenna that can be carried=20
in a backpack. Once it becomes 1 m and longer, a simple single turn loop=20
could be used as well...

Going on reading now :-)

73, Stefan/DK7FC


Am 19.08.2011 20:35, schrieb pws:
> Hi,
>
> O.K., once again. Seems like to post into /dev/null...
>
> I wrote:
> > All you need about constructing ferrite loops and what you can do=20
> using > this kind of antenna:
> > "New Potential of Low-Frequency Radionavigation in the 21st Century"
> > Doctoral thesis of Wouter Johan PELGRUM.
> >
> > Get it there:
> > http://www.vhl.tudelft.nl/pelgrum/formulier.adp
> >
> > Skip all Loran-C specific parts jumping just to chapter 5.
> > Included are many useful graphics about geometry,
> > winding lengths, bundling vs. stacking, arrays,
> > "counter wound" loops, screening, etc.
> >
> > It's worth reading even without understanding all that math - like me.
>
> Peter, df3lp