Seventy-five years ago this month, the August 1941 issue of Popular Science carried the plans for this midget one-tube broadcast receiver geared to the needs of the outdoor enthusiast.

According to the magazine, the set was small enough to be carried in a knapsack on hiking trips, but would pull in stations up to 400 miles away at night. It used a single 1T4 miniature pentode and got power from a standard flashlight cell running the filament, with a midget 45 volt battery supplying the B+.

When used in the great outdoors, a long nail could be driven into the earth for the ground connection, with a 40 foot wire tossed over a tree.

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