WM-F30

The WM-F30 was a stretchable radio Walkman based directly on the WM-30 chassis, adding FM, AM, and TV audio reception while keeping the same expandable metal-bodied format and single-AA power system. Dolby B noise reduction remained in place, and the tuner section was worked into the compact body without fundamentally changing how the sliding cassette-loading design operated. In effect, it was the radio version of Sony's super-compact cassette concept.

It shows how quickly Sony learned to build families rather than isolated products. Once the stretchable format had proved viable, it made perfect sense to carry it into the radio side of the range for users who wanted the same pocketable design with more listening options. The WM-F30 is not especially dramatic, but it is exactly the kind of logical variation that helped the Walkman ecosystem feel complete.