WM-F1

The WM-F1 is one of Sony's earliest radio Walkman models and a very direct attempt to add live listening without turning the player into a recorder or a much larger machine. Introduced in 1982, it paired a manual FM stereo tuner with a compact playback-only cassette platform from the WM-2 era, using the headphone cable as the radio antenna to avoid extra external bulk. It retained dual headphone jacks, Hotline mode, a manual tape-type selector, simple LED indication, and a 2x30 mW amplifier powered by four AA batteries, all without Dolby or more advanced control logic.

It captures radio integration before the radio Walkman had fully matured into its own branch. The WM-F1 still feels like a cassette player first and a tuner second. It belongs to the short phase when the format was still discovering how much extra function it could carry before becoming something else.