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Hi Stefan, thats interesting! Any idea of what's
inside that long grey tube? I would presume it's a coil wound around an iron
powder or ferrite bar, kind of large loopstick. Reminds me of our recent
discussion about possible long and thin high-voltage loading
coils...
Best 73,
Markus (DF6NM)
Sent: Wednesday, January 19, 2011 7:14 PM
Subject: VLF: PSK on 3.3 kHz by cavers
VLF,
A friend of me, F1BKM has told me about a recent
french VLF experiment
on 3.3 kHz. It seems they crossed 300m in PSK31 at 3.3
kHz.
Many photos are visible at
http://f6kcz.free.fr/Actualites/2011/Carrieres%20Fleury/Carrieres%20Fleury.htm
Looks
interesting but an earth loop may be better here. But the system
is very
/p!
73, Stefan/DK7FC
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