Hello Stefan,
what about "going underground".
I do remind an article on communication via some kind of ground antennas
in the WW1 (or WW2 ?) trenches (I guess it wasn't very convenient to put
up antennas within the sight of the enemy).
If I recall it right quite low frequencies were used.
Googling on "ground antenna war" resulted in this :
http://www.rexresearch.com/rogers/1rogers.htm
73, Rik ON7YD - OR7T
At 10:32 22/02/2010, you wrote:
Hello Horst,
That sounds really nice. If it would be easy to find some
motivated OMs in the near field (31km) ;-), that would be an interesting
field to test.
Yesterday i have thought about possible antenna
configurations for that range and got the idea that one could use a
forrest as an antenna tower. There, you could hang up 100s meters of
wire, in series and in parallel. You do not need to have that area beside
your house. Nobody will see the wire and nobody will care about it.
Since summer 2007 i have a horizontal loop antenna mounted in some
trees on my hill with excellent results on all HF bands and also 160m.
The loop has 130m and is mounted up to 12m above ground. Perfect matching
from 160m to 10m with my symmetric tuner. I even tried matching on 2200m
without a problem but with bad ODX results, of course. But if one would
try 2x 10*100m on VLF, the ODX would be interesting...
JO30OT is abt 160km from JN49IS and thus a little far i think ;-)
What is your RX antenna and have you already catched some commercial VLF
stations in that range? Are there some?
73, Stefan
PS: One can be sure that there will never be SSB operation ;-)
Von: [email protected]
im Auftrag von Horst Stöcker
Gesendet: Mo 22.02.2010 09:29
An: [email protected]
Betreff: RE: LF: AW: Beaconing on 8.79 kHz in QRSS
Hallo Stefan,
there was a notice in Funkamateur 12/05, S. 1287, that in DL the range
<9kHz is free.
I could not believe that so I asked the BNetzA and after a while I got a
letter which confirmed that.
So there nothing you've got to do for getting a licence. You do not need
one.
There is no limitation of technical parameters like bandwith or
power.
Hard to believe in german, but obviously true.
My QTH is Siegburg JO30OT
Horst
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