• Country
• Japan

• Manufacturer / Brand
• Sony Corporation; Tokyo

• Year
• 1983 ?

• Category
• Sound/Video Recorder and/or Player

• Radiomuseum.org ID
• 127261

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Audio-Amplification

• Wave bands
• - without

• Details
• Cassette-Recorder or -Player

• Power type and voltage
• Dry Batteries / 1,5 Volt

• Loudspeaker
• - For headphones or amp.

• Power out
• 0.01 W (unknown quality)

• Material
• Various materials

• from Radiomuseum.org
• Model: Walkman Stereo Cassette Player WM-20 - Sony Corporation; Tokyo

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

• Dimensions (WHD)
• 110 x 70 x 18 mm / 4.3 x 2.8 x 0.7 inch

• Notes
• Lecteur stéréo, encombrement d'un boitier de casette - le boitier rétractable s'étire pour accueillir la cassette - Réducteur Dolby B, mécanisme anti-roulis, sélecteur Normal/Métal, arrêt auto en fin de bande - casque spécifique ultra léger (14grs) - existe en 4 coloris: bleu, rouge, noir et argenté - pile de type LR6.
  Portable cassette player, accepts standard and metal cassettes, Dolby B noise reduction. Exists in four colour variants: blue, red, black, silver.

• Net weight (2.2 lb = 1 kg)
• 0.2 kg / 0 lb 7 oz (0.441 lb)

• Source of data
• - - Manufacturers Literature

• Author
• Model page created by Jean Claude Pigeon † 2008. See "Data change" for further contributors.

• Other Models

• Here you find 3913 models, 3773 with images and 947 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sony Corporation; Tokyo