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LF: RE: DK7FC's 6th VLF kite experiment

To: <[email protected]>
Subject: LF: RE: DK7FC's 6th VLF kite experiment
From: <[email protected]>
Date: Sun, 1 Aug 2010 21:47:16 +0200
Importance: Normal
In-reply-to: <[email protected]>
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Hello Stefan,
 
thanks for the experiment,unfortunataly nothing seen on the screen,
 
73
 
Victor
PA3FNY
-----Oorspronkelijk bericht-----
Van: [email protected] [mailto:[email protected]]Namens Stefan Schäfer
Verzonden: vrijdag 30 juli 2010 11:34
Aan: [email protected]; Renato Romero; Paul Nicholson
Onderwerp: VLF: DK7FC's 6th VLF kite experiment

Dear LF/VLF group,

It took a long time to get a proper wind forecast in a time sector where i can do a kite experiment. Also it took a long time to get the special permission for the new kite antenna.

But now, if the wind will be enough and if there is no rain on Sunday, the 1. August, i will make a new kite experiment.

The first time i will try to use a 200m vertical antenna and 600W TX power. The L of the loading coil will not be reduced in this experiment and so i will transmit at arround 6,5 kHz, the 46 km or 47 km band! This is since i do not yet know the actual antenna C (EZNEC says 972 pF). The ERP will be arround 16 mW (first estimation). This is about 10 dB more than in the first and successful 2nd experiment on March, 15th. Also it is said that propagation on 6 kHz is even better than on 9 kHz! The first time it could be realistic to reach the 1A antenna current mark!

Since some weeks i have set up a grabber in DFCW-120 mode (just to cover a broader frequency range) at http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html If you want to catch my signal, you can look there where i am actually transmitting. After some resonating tests i will transmit in good old DFCW-600, so it is the best you use a 3...5 mHz FFT and about 1 minute per pixel.

Starting time is 8 UTC, maybe some time later since it is the first experiment with such an antenna! I still do not know if big problems will occur but i am a DREAMER (remembering the 3rd experiment: http://abelian.org/vlf/ss100321/ ). But don't be disappointed if it would be failed. Actually it cannot fail since there will be found improvements for the next test!
TX QTH is as usual in JN49IS, 49.77647N 8.699525.

The summer time and maybe day time may be not the best but it is an important test for the winther period. Maybe we will see some surprises depending propagation on arround 6 kHz. And it will be the first time that an amateur reaches the far field and hopefully more than 1 Lambda on such a low frequency :-)

Any RX reports and ideas/hints (before and after the test) are very appreciated!

Best 73, Stefan/DK7FC *excited*
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