The young man shown here is diligently hitting the books, but he’s also entertaining himself, thanks to the combination radio-bookends described 80 years ago this month in the April 1939 issue of Popular Science. The radio is built into one bookend, and the speaker into the other. The two ends can fold down for easy transport, as shown below.

The circuit itself contains four tubes. A 6SJ7 pentode serves as regenerative detector, with a 6SF5 and 25A6 as audio amplifier. A 25Z6 full-wave rectifier rounds out the tube compliment. According to the text, the antenna is built in, although the schematic shows connections for external antenna and ground for pulling in the distant stations.