1986 WM-35
The WM-35 is a Walkman for playback only.
1986
WM-F107
The WM-F107 is a Walkman with a built-in radio. It features Dolby B and automatic reversal. It belongs to the early Walkman lineage that integrated radio functionality.
Sony explored alternate power systems in the mid-eighties, and the WM-F107 became the most ambitious result. It placed a solar panel across the front of the chassis, supplying power to an internal rechargeable battery and supporting direct radio operation under strong sunlight.
The idea built on earlier experiments such as the BPT-36 solar charger from 1982, which had shown that photovoltaic cells could meaningfully extend portable playback. The power system drew from three sources: the solar panel, the internal rechargeable pack, and an external AA battery caddy.
See also WM-F202
