• Country
• Japan

• Manufacturer / Brand
• Sharp; Osaka

• Year
• 1961

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 168919

• • alternative name: Hayakawa Electric Co.Ltd.

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

• Number of Transistors
• 8

• Semiconductors
• 2SA58 2SA92 2SA49 2SB53 2SB54 2SB54 2SB189 2SB189

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• Dry Batteries / AA: 3 x 1.5 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 2.5 inch = 6.4 cm

• Power out
• 0.2 W (undistorted)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: 2-Band Transistor 8 BX-381 - Sharp; Osaka

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

• Dimensions (WHD)
• 6.625 x 3.375 x 1.375 inch / 168 x 86 x 35 mm

• Notes

• Sharp Model BX381

    A portable two-band, eight transistor, superhet radio with AGC, two diodes and one thermistor. Power output 200 mW. Speaker: 2½" PM Dynamic. Powered by 3 x 915 (AA) Eveready type batteries.
    Built-in ferrite core antenna and built-in telescopic antenna. Tuning range: BC 535-1605 kC/s (kHz). SW 3.9 - 12 MC/s (MHz).

  Jack for earphone.
  Jack for Phono input.
  Switch for sensitivity: Low-High-Local.
  Light for dial scale.

  This model sold in Australia between 1961 & 1963 for £40/19/-.

• Net weight (2.2 lb = 1 kg)
• 0.450 kg / 0 lb 15.9 oz (0.991 lb)

• Mentioned in
• Guida Pratica Transistor Radios

• Literature/Schematics (1)
• J.R. Publications Transistor Radio Service Handbook (Group C1, 1964, Page S128. [Also at KevinChant com])

• Literature/Schematics (2)
• Mingay's Price Service (Feb 1962 to Feb 1963.)

• Author
• Model page created by Eduard Abfalterer. See "Data change" for further contributors.

• Other Models

• Here you find 1338 models, 1209 with images and 517 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Sharp; Osaka