Illustrated instructions in both Japanese and well-translated English are included, and the hour-long assembly only requires a screwdriver, some scotch tape, and a battery. This kit definitely delivers on the archaic, hands-on audio experience. Recommended for all ages.

Jensen designed the clock and circuit board himself, and his elegant sense of aesthetics became apparent to me as I assembled the board and mounted it and the tubes into the handsome metal case. The finished clock looks like the creation of some famous mid-century modern designer. I plan to buy more of Jensen’s clock kits to make and give as gifts.

Unlike traditional crystal sets, the XS-402 uses a molded, high frequency choke, eliminating the frustrating coil-winding process, and features large solder pads, great for learning to solder. It’s a perfect project for adults to build with kids, and it serves as a great tool to teach basic radio theory, soldering, and handling of electronic parts and PCBs.  If you’re interested in “old school” radio technology or want to learn more complex skills, this is the kit for you.