1R-81

• Country
• Japan

• Manufacturer / Brand
• Sony Corporation; Tokyo

• Year
• 1966 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 111664

• Picture
• Schematics

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

• Number of Transistors
• 8

• Semiconductors
• 2SC403 2SC403 2SC403 2SC403 2SC402 2SC401 2SD64 2SD64

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 3 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 2 x 1.35 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 1R-81 - Sony Corporation; Tokyo

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

• Dimensions (WHD)
• 2.5 x 1.75 x 0 inch / 64 x 44 x 0 mm

• Notes

• Supplied in clamshell box. Gross weight 0.220 kg.g

  Batteries: 2 button cells RM640 (Mercury)

• Net weight (2.2 lb = 1 kg)
• 0.190 kg / 0 lb 6.7 oz (0.419 lb)

• Author
• Model page created by a member from A. See "Data change" for further contributors.

• Other Models

• Here you find 3971 models, 3831 with images and 955 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sony Corporation; Tokyo