• Country
• People's Republic of China

• Manufacturer / Brand
• Tianjin 天津渤海无线电厂 Tianjin Bohai Radio Factory; Tianjin (N)

• Year
• 1973 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 337540

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

• Number of Transistors
• 9

• Semiconductors
• 3AG25 3AG24 3AG24 3AG24 3AX31B 3AX31B 3BX31B 3AX31B 3BX31B

• Main principle
• Superheterodyne (common); ZF/IF 465 kHz; 2 AF stage(s); none

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast plus 2 Short Wave bands.

• Power type and voltage
• Dry Batteries / AA: 4 x 1.5 Volt

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

• Power out
• 0.05 W (0.2 W max.)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Haiou 海鸥 802 - Tianjin 天津渤海无线电厂

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

• Dimensions (WHD)
• 155 x 85 x 40 mm / 6.1 x 3.3 x 1.6 inch

• Notes

• This is a miniature palm-top three band portable radio receiver produced by Bohai.

  It uses 9 Germanium transistors and supports:

  • MW: 525-1605 kHz
  • SW I: 3.9-11 MHz
  • SW II: 11-22 MHz

  Other noteworthy technical features include: An additional IF stage using ceramic filter to improve sensitivity and selectivity.

  • Regulated power supply to bias RF-mixer stage and first two IF stages
  • Fully DC-coupled OTL power stage for better sound performance       
  • High quality elliptical ALNiCO magnet moving-coil speaker (6cm longitudinal)

• Net weight (2.2 lb = 1 kg)
• 0.5 kg / 1 lb 1.6 oz (1.101 lb)

• Price in first year of sale
• 100.00 RMB

• Author
• Model page created by Yu Zhu. See "Data change" for further contributors.

• Other Models

• Here you find 25 models, 16 with images and 23 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tianjin 天津渤海无线电厂 Tianjin Bohai Radio Factory; Tianjin (N)