Re: VLF: Re: Transmitting 250W at 8970 Hz on a 600m spaced earth antenna

[Roger Lapthorn <rogerlapthorn@gmail.com>]

Hi Stefan,

Please summarise Saturday's tests with the earth electrode antenna on 8.97kHz. The above emails leave me a bit confused about who saw the signal (?) and at what distance.

I believe you are going to repeat the tests to get a better confirmation of the result?

73s
Roger G3XBM

2010/8/28 Stefan Schäfer <schaefer@iup.uni-heidelberg.de>

Hi Michael, Markus, VLF,

Well, time and frequency absolutely corresponds with my transmission so i would say it is a positive reception. Anyway i think we should do the test again, sending a message or a some charakters to better confirm the reception. Maybe DD7PC is QRV in DFCW-600 (abt 4 mHz) again the next time?

The distance of the todays experiment is: 49.6 km.

My antenna bearing is 9/189 deg, the QTH of Michael is in an angle of 54 deg to this antenna. So, not an ideal orientation, if the antenna acts like a loop, but a weak reception anyway. The picture shows the locations of TX and RX. The yellow line is the distance, the white line is the antenna orientation. TX power was 250 W, just like yesterday. Antenna current will be measured in the next experiment...

Tnx to Michael for the effort to catch that signal (Markus as well).

73, Stefan/DK7FC

PS: Markus, tnx for the screenshots of the DFCW-3 message :-)

Am 28.08.2010 13:09, schrieb Michael Oexner:

Hi Markus, Stefan and list,


 

Since 10:25, Stefan is on air again with his ground loop. Signals
on his own grabber are even better than yesterday, perhaps due to
somewhat lower QRN. I am also looking here but don't have much hope,
as the TX antenna is N-S oriented and Nuernberg is 180 km due east.
 Good luck,
Markus (DF6NM)
   

Have a close look at the enclosed screenshot... what would you say?

There is a weakish line on 8969.735


 

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