Re: Re: LF: 8969.9970Hz

[uwe-jannsen@kabelmail.de]

Hi Wolfgang, Markus, Stefan, Peter and all,
the TX is off since abt 1000MEZ  sri, but the rain was and is too strong.
on the air agn when the WX is ok.
GL
Uwe/dj8wx

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Von: rsgb_lf_group@blacksheep.org
Gesendet: 02.01.2014 00:23
An: rsgb_lf_group@blacksheep.org
Betreff: Re: LF: 8969.9970Hz

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Hi Uwe,

I was doing some tests with my PA some time ago. Now all EMC problems are solved, it works without problems at 320V DC. It looks like this test has caused some overloading of the grabber since i was testing at 8970 Hz. No antenna was connected and it was indoors and in 30m distance. Strange...
Now i'm doing a first test with the PA, VOX and OPDS32 on my own grabber to see if i can make a decode. Should be finished arround 23:45 UTC and displayed at http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html , like your decode, if it happens. I've reduced the signal, 1 kOhm in series to a LOPT transformer and 5m wire in 1m above ground in 30m distance. Voltage across the h bridge is 3V :-) The signal is 15 dB in my 600 window so your signal should not be affected.

Good luck!

73, Stefan/DK7FC

Am 01.01.2014 22:31, schrieb uwe-jannsen@kabelmail.de:

Hi Wolf, Stefan, Markus and all,
i changed at 2223MEZ to Op-4H and leave the PC as it is. no other progr are running.
do my email stuff etc with an other one.
GL and Gn
Uwe/dj8wx