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Date: Sat, 29 May 2010 16:16:41 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: VLF: VTX India @ 17 kHz
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This is just a link to the diatnace to VTX, for increasing the=20
fascination...

http://www.iup.uni-heidelberg.de/schaefer_vlf/VTX_India.pdf

73, Stefan


Am 29.05.2010 15:54, schrieb Stefan Sch=E4fer:
> Hello Peter,
>
> Tnx for your comments again! Yes, there are still some lines that=20
> should not have to be where they are ;-) But anyway, it is the best=20
> reception i ever had. Now it's time to generate a test signal on the=20
> dreamers band ;-)
>
> Also tnx for your last mail. You said i can receive VTX India @17 kHz.=
=20
> This is one transmitter that is very weak but visible anyway. The=20
> distance to me is 7795km. Very interesting: Type this in Google Earth:=
=20
> "08.387015, 077.752762" and you can see the towers of the=20
> transmitter... So, i spend a VTX window on the bottom of my 2nd=20
> grabber. VTX appears up to 25dB above noise in 4,5mHz (equal to the=20
> DFCW-600 window). Slowly i get fascinated by the whole VLF band ;-)
>
> Peter (or others), do you know a USB soundcard, that is able to run at=
=20
> 96000 ksamples/s? There are a lot of USB soundcards that cost not even=
=20
> 5 EUR and do a very good job (currently i am using such one) but most=20
> of them have a filter for 48000 it seems...
>
>
> 73, Stefan/DK7FC
>
> Am 29.05.2010 08:27, schrieb pws:
>> Hi Stefan,
>>
>> You wrote:
>>> ...
>>> Thus, the strong LF and MF broadcast signals are well attenuated,
>>> as it seems. I am interested what happens in the night, when QRM goes
>>> down and the LF/MF DX window opens. The grabber2 is still available at
>>> http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
>> Looking good, congrats! I wonder about that signal visible at 2100=20
>> Hz. It
>> shows a typical MSK-bandwidth and a diurnal run not unlike the others
>> above. May be it's mirrored from next Nyquist-domain:
>> 24000 + (24000-2100) =3D 45900 =3D=3D>  NSY, Sicily, usually very stron=
g.
>>
>> Gruesse aus Kiel,
>> Peter