Edgar, VLF,
My congratulations and respect for your permanent available well
working RX system and your patience. When looking back, i remember a
number of remarkable achievements we made, also on LF. Great work!
As you say, credits go of course to Wolfgang, Paul and Markus for their
great tools and help. Very much has been developed in this decade.
What now? Are 3 characters realistic? We learned that normalizing and
stacking can be quite a complex thing and there is that propagation
over this path which is not completely predictable and not always
reproducable.
I'm going to try 3 characters which needs about 12 dB SNR. But first,
some carrier transmissions again...
Roman, i used the inverted L antenna, not the loop. Antenna current was
1.2 A. That's about 320 W and about 23 kV on the antenna, i.e. quite
relaxed ;-)
73, Stefan
Am 14.09.2018 00:03, schrieb Edgar:
A successful transmission, on 17470.1 Hz, of a two character EbNaut
message was completed on the 10 th September 2018.
The transmitter was at JN49ik, Germany and receiver at QE37pd Tasmania
a path of ~ 16786 km (10491 miles).
The message was decoded by processing the signals received on the 8 th
and 10 th of September 2018.
The software used was
Spectrum Lab by Wolfgang "Wolf" Buescher ( https://www.qsl.net/dl4yhf/spectra1.html
) and
EbNaut Coherent BPSK programs, by Paul Nicholson ( http://www.abelian.org/ebnaut/
)
The receiving set-up was a 1 m whip with a FET buffer at 9 m, a
Steinberg UR 242 audio interface,
a Garmin GPS unit and Asus notebook.
Thank you to Stefan Schaefer DK7FC for his help and guidance to make
this possible, and Wolf and Paul for their excellent software.
Regards, Edgar
Moonah, Tasmania.
P.S. Message re-sent with smaller image.
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