Given that virtually nothing is radiated
then is it really “radio”?? Or could it be in fact our own
version of PLT?? Albeit at very uber vlf and using the earth as the mains?
Discuss?
With best regards
Jim
Dr. James Cowburn
E [email protected]
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I am unsure of the "official" UK position regarding operation
below 9kHz. Back in the late 1960s a Test and Development Licence was required
and I held two around 1970 (G9BIB and G9BGU) for "earth mode" experiments
between 0 and 50kHz. If you ask OFCOM I suspect they will
require you to have a special permit (NoV), HI.
It would be very interesting to know just how far amateurs could
communicate below 9kHz. Amplifiers of 500-1000W coupled with the very best in
weak signal modes and widely spaced grounded electrodes or large induction
loops might result in the 10km barrier, achieved some years ago, being
exceeded. ERP is meaningless at these frequencies as virually nothing will be
radiated: communication will be by conduction through the ground or by
induction.
On 22 February 2010 14:50, Rik Strobbe <[email protected]>
wrote:
And do you know if f<9kHz is free for other countries in europe
as well? What about the UK?
Stefan,
in Belgium
anything below 9kHz (and above 300GHz) is "free"
73, Rik ON7YD - OR7T
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