----- Original Message -----
Sent: Monday, February 22, 2010 10:59
PM
Subject: RE: LF: VLF_8.79 kHz
>But what about that WSPR mode,
everyone was using before some weeks? Wouldn't that be a nice tool to try
>what's possible, for a first step?
Stefan,
I just did a simple test:
I took 2 old LW ferrite antennas and
brought them to resonance at 1.5kHz with a bunch of capacitors.
One ferrite antenna was used as TX
antenna, fed by the 5W active speaker of the main PC in the shack transmitting
the WSPR audio signal.
The second ferrite antenna served as RX
antenna connected to the mic input of my notebook, acting as
receiver in the living room (a surprised look of the XYL, but she is
meanwhile used to my strange behaviour).
Solid copy in WSPR, over a
distance of 15m.
OK, it's just a very loose couple
transformer. But it works fine and based on the signal strength (through a
couple of walls) there is more in it than 15m.
73, Rik
ON7YD
