Note that all portable multiband radios will have an antenna optimized for 87-108MHz. If you want to receive shortwave better you'll need to add a couple dozen feet of wire to the antenna: https://en.wikipedia.org/wiki/Shortwave_broadband_antenna
couple alligator clips and a slinky toy will do in a pinch. although it is possible to construct a jam-proof and noise-reducing antenna for shortwave with a few strips of aluminum foil and some paper or wax paper (ideally). It lays flat on a floor or bed, and you "tune" it by moving the "frame" shape closer or further apart. there's a book involved.
It was used to have secret, covert, etc radios. It's believed to be used by assets in the field to receive numbers stations, especially when there's a lot of man made noise in the area.
It was used to have secret, covert, etc radios. It's believed to be used by assets in the field to receive numbers stations, especially when there's a lot of man made noise in the area.