Shown here is a simple one-transistor regenerative receiver for the broadcast band, from the November 1955 issue of Popular Electronics. It had been sent in to the magazine by one Mr. R. Zarr of Brooklyn, NY, who pointed out the simple regeneration mechanism, consisting of two capacitors across the emitter and collector of the CK722 transistor.

The set was said to be selective, being able to separate the many stations booming in in the New York area.