Maybe it’s a hand-me-down from an elderly relative. Maybe you found it at a flea market, or it has been hidden in the attic for far too long. It could be an anonymous-looking black box with big dials ...

If you look at the tuning dials of most medium-wave (commonly known as AM) radios sold in the United States from 1953 through ...

[Mr. Carlson] is truly an old radio surgeon. The evidence? He recently restored an 83-year-old DeForest radio by transplanting an identical chassis from another similar radio. The restoration is fun ...