Essentially its just a filtered EMF amplifier. Its a technique particularly suited (limited) to AM broadcasts. If you had an AM broadcast TX at home, you could do the same with a tuned length of wire and your home wifi amp.
In fact hams have to work hard to stop it happening to their neighbours!!! (High power AM morse & voice is a real pain to work with interference wise)
As you say, its limitations (selectability & range) have to be understood, if you are to work with it, but it has the advantage of receiving everything without fiddling with it.
Last edited by: Zero on Thu 23 Mar 23 at 09:40
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