Message-ID: <4C9392E3.4060406@iup.uni-heidelberg.de>
Date: Fri, 17 Sep 2010 18:10:11 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <schaefer@iup.uni-heidelberg.de>
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To: rsgb_lf_group@blacksheep.org
References: <E40D2EDD6F694ABEA1FAEF407CDD8F23@AGB> <1284586971.15013.13.camel@pat-compaq-evo>,<4C914089.8050309@gmail.com> <38F4A9873A5B474DB6FB337B1B69ABA162F30A8BC9@HERMES8.ds.leeds.ac.uk>
In-Reply-To: <38F4A9873A5B474DB6FB337B1B69ABA162F30A8BC9@HERMES8.ds.leeds.ac.uk>
Subject: VLF: Earth antenna audio file for download
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Dear VLF,

Before some days i tried to send an audio file for an analysis of my 
earth antenna reception, without success.
Now i have arranged a website for exchanging all files: 
*http://www.iup.uni-heidelberg.de/schaefer_vlf/download/download.html  
(User: LF, Password: DREAM9)*

Those who want to play with the file in SpecLab can download usr files 
and wav files for their own analysis. There are many informations and 
much can be learned, e.g. adjusting/optimising noiseblanker or clipper 
settings. Also it is shown how the 600m long earth antenna behaves.
There is a small file extraction that was taken just between the TX 
power reduction of DLF (500 kW to 250 kW) where the TX was OFF for some 
seconds...
Sferics are well audible down to very low frequencies.

Today i have taken the frequency response of the input lowpass filter, 
it performs very well. So, future audio recordings should be much 
clearer, without dirturbance of DLF...

So, if you want to play with the files, have fun. :-)

73, Stefan/DK7FC

PS: The files are sampled at 96kS/s, so covering 0...48 kHz

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Dear VLF,<br>
<br>
Before some days i tried to send an audio file for an analysis of my
earth antenna reception, without success. <br>
Now i have arranged a website for exchanging all files: <b><a class="moz-txt-link-freetext" href="http://www.iup.uni-heidelberg.de/schaefer_vlf/download/download.html">http://www.iup.uni-heidelberg.de/schaefer_vlf/download/download.html</a>&nbsp;
(User: LF, Password: DREAM9)</b><br>
<br>
Those who want to play with the file in SpecLab can download usr files
and wav files for their own analysis. There are many informations and
much can be learned, e.g. adjusting/optimising noiseblanker or clipper
settings. Also it is shown how the 600m long earth antenna behaves.<br>
There is a small file extraction that was taken just between the TX
power reduction of DLF (500 kW to 250 kW) where the TX was OFF for some
seconds...<br>
Sferics are well audible down to very low frequencies.<br>
<br>
Today i have taken the frequency response of the input lowpass filter,
it performs very well. So, future audio recordings should be much
clearer, without dirturbance of DLF...<br>
<br>
So, if you want to play with the files, have fun. :-)<br>
<br>
73, Stefan/DK7FC<br>
<br>
PS: The files are sampled at 96kS/s, so covering 0...48 kHz<br>
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