RE: LF: VLF_8.79 kHz

[Jacek Lipkowski <sq5bpf@lipkowski.org>]

On Mon, 22 Feb 2010, Rik Strobbe wrote:

> I just did a simple test: I took 2 old LW ferrite antennas and brought 
> them to resonance at 1.5kHz [...] Solid copy in WSPR, over a distance of 
> 15m. [...]
now try to repeat the same test with both antennas outside. you will find 
that the coupling to wires within your home enhances the signal, this 
principle is used in mine comminications on lf. you should still be able 
to span 15m, but the signal should be much weaker.
btw, this is one route that you can take to transmit vlf, but coupling 
your transmitter to big commercial strictures might be illegal (hint :)
VY 73

Jacek / SQ5BPF