- Country
- People's Republic of China
- Manufacturer / Brand
- Tianjin 天津渤海无线电厂 Tianjin Bohai Radio Factory; Tianjin (N)
- Year
- 1972 ??
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 181101
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Transistors
- 7
- Main principle
- Superheterodyne (common); ZF/IF 465 kHz; 3 AF stage(s)
- Tuned circuits
- 5 AM circuit(s)
- Wave bands
- Broadcast only (MW).
- Power type and voltage
- Dry Batteries / 6 Volt
- Loudspeaker
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
- Material
- Plastics (no bakelite or catalin)
- from Radiomuseum.org
- Model: Haiou 海鸥 706 - Tianjin 天津渤海无线电厂
- Shape
- Portable set > 8 inch (also usable without mains)
- Notes
- The radio model Haiou 海鸥 706 (Seagull) has the following key features 主要性能: Frequency range 频率范围: broadcast band 535 - 1605 kc. Sensitivity 灵敏度: < 1 mV/m. Selectivity 选择性: 16 dB N/S. Set audio output 额定功率: 100 mW (400 mW). The IF 中频频率 is most probably 465 kc. Loudspeaker impedance is 8 ohm. 2 diodes. The documentation by manual 03 on page 204 is for the two models Haiou 海鸥 703 and Haiou 海鸥 706 together. Only the case seems to be different.
There is at least another radio model Haiou 海鸥 706, made by Shanghai Changkong Radio Factory; Shanghai 上海长空无线电厂. Please check before uploading pictures.
- Literature/Schematics (1)
- 03-Transistor Radio Circuit Manual 1981 August (1 of 5) (page 204.)
- Author
- Model page created by Ernst Erb. 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)