Hi Stefan!
At least at my site, QRM/QRN was pretty low this day and so rather the
(too) wet soil could be the reason for your weak signal.
I watched you grabber and when I saw you were "only" 40db oN on your
DFCW6000 window (4-5km), I had no hope to copy your signal here at
594km!
BTW: Do you think it is true that we can assume 18db Loss for twice the
distance?
73
OE3GHB
Gerhard
Am Freitag, den 19.11.2010, 19:32 +0100 schrieb Stefan Schäfer:
> Hi Gary, VLF,
>
> OK, nothing received this time, not even by Paul Nicholson. A pity.
> But it was shown that Micheal Oexner clearly received the signal at
> 250W in DFCW-600 (before some weeks) so it must have been about 10 dB
> stronger at 100W and 141 µHz. So there must have been other reasons
> why there was no reception. Maybe the wet soil is still a disadvantage
> or the QRM was just to high.
> I will not give up on the earth antenna but maybe it makes more sense
> to try more power and a faster mode in shorter distances first. Maybe
> i will arrange a RX at my parents QTH in 36 km distance...
>
> Its time to make an new kite experiment. If the wind will be fine, i
> will do it next weekend. Before i want to arrange a 3rd tap on the
> coil for 300m @ 8970 Hz. And i am highly interested to drive this
> antenna on 137 kHz :-)
>
> Thanks to all for taking part at the yesterdays test and building up
> RX and Grabbers! :-)
>
> 73, Stefan/DK7FC
>
> PS: After the test, the PA, SMPS, netbook, car, antenna and the forest
> is well up! Batteries were discharged to 9 V ;-)
>
>
>
> Am 19.11.2010 16:32, schrieb Gary - G4WGT:
> > Hello Stefan,
> >
> >
> > Nothing here up to the sound card crashing about midnight.
> >
> >
> > 73
> >
> >
> > Gary - G4WGT
> >
> >
> > On 19 November 2010 11:03, "Jean-Pierre Méré (F1AFJ)"
> > <[email protected]> wrote:
> > Hi Stefan ,
> >
> > Nothing here ! I listening 20:00 to 07:00 today
> >
> > 73 Jean-Pierre f1afj
> >
> > Le 19/11/2010 11:50, [email protected] a écrit :
> >
> > Not a trace Stefan,sorry,
> >
> > 73
> > Victor
> >
> > -----Oorspronkelijk bericht-----
> > Van: [email protected]
> > [mailto:[email protected]]Namens
> > Stefan Schäfer
> > Verzonden: vrijdag 19 november 2010 10:15
> > Aan: [email protected]
> > CC: Paul; Bernd Grupe
> > Onderwerp: Re: VLF: Long time transmission on earth
> > antenna
> >
> >
> > Dear VLF,
> >
> > It seems these batteries are not in best condition.
> > The carrier got
> > weaker and weaker in the morning and disappeared
> > arround 5 UTC.
> >
> > The SMPS that drives the PA is designed to generate
> > its own 15 V supply
> > once it started to run. But if the input voltage
> > falls below 10V (or 9)
> > it shuts down. Seems that this has happend... The
> > batteries have> 300
> > Ah in sum so it should have been no problem,
> > actually...
> >
> > I assume no one except me has detected anything?
> >
> > BTW: The starting time was 15:30 UTC so the DFCW
> > shift appeared at 23:30 UTC
> >
> > 73, Stefan/DK7FC
> >
> >
> >
> > No virus found in this incoming message.
> > Checked by AVG - www.avg.com
> > Version: 8.5.449 / Virus Database: 271.1.1/3265 -
> > Release Date: 11/18/10
> > 19:34:00
> >
> >
> >
> >
> >
> >
> >
> >
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