• Country
• Japan

• Manufacturer / Brand
• Sony Corporation; Tokyo

• Year
• 1987 ?

• Category
• Sound/Video Recorder and/or Player

• Radiomuseum.org ID
• 270809

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Cassette-Recorder or -Player

• Power type and voltage
• Batteries / addl. power jack / 2 x 1,5 / 3 Volt

• Loudspeaker
• - For headphones or amp.

• Material
• Metal case

• from Radiomuseum.org
• Model: Walkman Stereo Cassette Player WM-DD1 - Sony Corporation; Tokyo

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Dimensions (WHD)
• 81.2 x 119 x 36.5 mm / 3.2 x 4.7 x 1.4 inch

• Net weight (2.2 lb = 1 kg)
• 0.235 kg / 0 lb 8.3 oz (0.518 lb)

• Author
• Model page created by Jürgen Küting. See "Data change" for further contributors.

• Other Models

• Here you find 4016 models, 3872 with images and 964 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sony Corporation; Tokyo