Seventy-five years ago, this young man with large pockets was pulling in a program with this three-tube “pocket size” receiver. He built it according to plans in the August 1948 issue of Popular Mechanics, and the set was ideal for taking to a ball game or on hikes.

The regenerative set had a built-in loop antenna, and ran on a 45 volt B battery, with flashlight batteries in parallel to light the filaments.