After you get too far away signal just drops, if you’re willing to put up with higher noise level range of normal AM radio is basically global
This depends very highly on the condition of the ionosphere and its ability to reflect the signal. This doesn’t make its useful range global, even if you can pick up very distant broadcasts occasionally.
This depends very highly on the condition of the ionosphere and its ability to reflect the signal. This doesn’t make its useful range global, even if you can pick up very distant broadcasts occasionally.