Paul, the TX power was up to 300W and the current arround 530...570 mA, so an
optimal ERP of abt 2mW. The wind was strong and the kite at a high angle for
the most time!
Jim, M0BMU is the 2nd best DX distance! Jim, can you describe you RX detailed,
pse. Or have i forgotten an older mail? What was the new /p QTH? And what are
your observations about the change of QRM?
BTW: We could philosophize what is the definition for "DX" on LF and VLF! Or is
there a standard definition? In my ham licence i learned that on HF, DX is
outside the own continent and on VHF it is above 300km. So, what is it for LF?
And what for VLF (by hams)?
When we think about the effort and the average antenna systems available we
could call "DX" on VLF all that is beyond the near field, or say 10km, that it
sounds not too much unusual? What do you (all) think?
73, Stefan/DK7FC
________________________________
Von: [email protected] im Auftrag von Paul Nicholson
Gesendet: Mo 22.03.2010 18:14
An: [email protected]
Betreff: Re: LF: Re: DK7FC's 3rd VLF transmission
My best effort at a spectrogram, added to end of
http://abelian.org/vlf/ss100321/
Produced after re-running the signal processing without
clock correction. The spectrogram is normalised for
uniform background.
Unfortunately the message was not copied - the initial
tune-up and first dash of the first K is lost because
the background noise bearing is very close to the signal
bearing. Here is the noise plot for the day,
http://abelian.org/vlf/live/100321.9kHz.png
Note the bearing of the noise between 12:00 and 13:00,
and Frankfurt is on 116 deg! By 13:30 the noise had
shifted far enough to copy the signal.
Too bad the test was not the previous day, when noise
was very low and North/South!
Congratulations to Renato Romero IK1QFK for the longest
distance clearly copied so far - 544km!
Stefan - what was the kite height and current?
--
Paul Nicholson
--
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