Plugging the replacement coil into the crystal radio circuit was unsatisfying, to say the least. Only one AM station was heard, and then only barely. A few tweaks to the SMD coil improved the ...

It’s then a simple matter of hooking up the right pads on the credit card to the rest of a crystal radio circuit, and you’re all set. Of course, [Billy] goes the whole hog, building the entire ...

The National Association of Broadcasters (NAB), the commercial broadcasting industry’s trade association, announced ten winners of its Crystal Radio Awards on Tuesday. The Crystal Radio Awards ...