The plans for this handsome one-tube receiver appeared a hundred years ago this month, in the January 1924 issue of Popular Science. The regenerative set, when used with a high-quality loudspeaker, was capable of producing volume to fill a large room, with but a single tube. The secret was the antenna coil, which served as an autotransformer to boost the signal in the regenerative circuit.

The set was both sensitive and selective. When tested in New York City, within a couple of miles of some strong broadcast stations, it easily pulled in more distant stations. And with a 100 foot antenna, the author reported pulling in Chicago with loudspeaker volume.