Hongdeng 红灯 2J9-2

Shanghai No.2 上海无线电二厂 Shanghai No.2 Radio Factory; Shanghai

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  • Year
  • 1972 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 181086

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

 Technical Specifications

  • Number of Transistors
  • 7
  • Main principle
  • Superheterodyne (common); ZF/IF 465 kHz; 3 AF stage(s)
  • Tuned circuits
  • 7 AM circuit(s)
  • Wave bands
  • Broadcast plus 2 Short Wave bands.
  • Power type and voltage
  • Dry Batteries / 9 Volt
  • Loudspeaker
  • Permanent or electro-dynamic (moving coil), system not known yet.
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Hongdeng 红灯 2J9-2 - Shanghai No.2 上海无线电二厂
  • Shape
  • Tablemodel, low profile (big size).
  • Dimensions (WHD)
  • 350 x 210 x 165 mm / 13.8 x 8.3 x 6.5 inch
  • Notes
  • The radio model Hongdeng 红灯 2J9-2 (Red Lantern) has the following key features 主要性能: Frequency range 频率范围: broadcast band 535 - 1605 kc plus SW 2 - 6 mc and 6 - 12 mc. Sensitivity 灵敏度: < 1 mV/m (0.1 mV/m). Selectivity 选择性: 20 dB (S/N). Electric power consumption 电源消耗 at zero signal 零信号: 15 mA, at max. it is 150 mA. The IF is most probably 465 kc. Set audio output 额定功率 : 500 mW (1.2 Watt). 2 diodes. The two models Hongdeng 红灯 2J9-2 and Hongdeng 红灯 2J9-3 share the same documentation and schematic. The case of 2J9-3 is bigger.
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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