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Date: Fri, 12 Apr 2019 13:13:37 +0200
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Subject: Re: ULF: EbNaut message transmitted from ground loop
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Am 12.04.2019 11:59, schrieb Jacek Lipkowski:
> No, i have to order an audio injector card, and find a way to reliably 
> connect to the internet (whis is not easy in this location).
>
> This is a project for vacation.
RR. I have experience with the octo-soundcard, which i use on the tree 
and also in a portable radio recorder.

It may be useful to archive locally to a 1 TB USB HDD, not only 
streaming to the internet. If the connectivity is bad during an 
experiment, you can later extract and transfer the data from the HDD. So 
nothing is lost.

> Yes, pity. Maybe you could run some tests at 8270Hz, so that more 
> people could receive it.
The number of active RX stns at 8270 Hz does not really differ. It is 
DL0AO, DF6NM, SQ5BPF, Paul, and DK7FC. And indirectly IK1QFK and DL4YHF. 
On request it can be W1VD and K3SIW and eventually RN3AUS.
10 stations, actually not so bad, for that special frequency range(s).
Oh yes, that's another question: Is is possible to make the TA path over 
to W1VD at night on 8270 Hz, if the signal is actually 100x stronger 
than from my INV-L?

> More stations would be interesting, because i think that the ground 
> dipole pattern is not what you would expect (the null might not be 
> where it is in a dipole, which would be absurd btw):
>
> During your previous tests on 8270Hz i had a very good signal compared 
> to Paul, even though the dipole location should favor Paul. Looking 
> from your location Paul and i am almost 90 degrees apart, and the 
> distance is similar.
You are exactly 60 deg apart, which means -6 dB into your direction. And 
you are 130 km more distant and in a city. And Pauls RX system is 
certainly one of the TOP3.
Yes, obviously not the expected pattern. Thus i asked RN3AUS (> 2000 km) 
to listen for me. But there was nothing. When i transmitted from the 
INV-L last year, his SNR of my signal was as good as on your side, 
although the distance is twice as high. So his RX must be very good, 
proofed on 6470 Hz and 5170 Hz also. So the question is, how does it 
look in 2000+ km distance.
A Rx station in Iceland would be ideal, like TF3HZ in 2010+.

> Not doable unless i put a 20m antenna tower there (which i won't). And 
> there is no region with low tree density.
One of the big advantages of the recent ground loop transmissions is 
that transmissions take in the order of 1...2 hours, because my accu is 
empty after that time and my patience is empty as well. From the E field 
antenna it often took 10 hours because it was possible to transmit so 
long and my patience was close to infinite. So, you could even use your 
car and your RX and drive to an open field and receive there, for a 
short time period. Hopefully your car is not a QRM generator then. Mine 
is from 1989 and is absolutely silent :-) It works as good as Blacksheep 
and i keep it, although it could crash some day. :-)

73, Stefan


>
> VY 73
>
> Jacek / SQ5BPF
>
>
>