Shuanghuan 双环 712

Dandong Nr.4 丹东无线电四厂 Dandong Nr.4 Radio Factory; Dandong (Liaoning, NE)

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  • Year
  • 1972 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 182386

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

 Technical Specifications

  • Number of Transistors
  • 8
  • 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
  • Line / Batteries (any type) / AC 220 / Battery 6 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Material
  • Various materials
  • from Radiomuseum.org
  • Model: Shuanghuan 双环 712 - Dandong Nr.4 丹东无线电四厂 Dandong
  • Shape
  • Tablemodel with Clock ((Alarm-) Clock Radio).
  • Dimensions (WHD)
  • 380 x 170 x 140 mm / 15 x 6.7 x 5.5 inch
  • Notes
  • The radio model Shuanghuan 双环 712 (Double Ring) offers the following key features 主要性能: Frequency range 频率范围: broadcast 535 - 1605 kc. Sensitivity 灵敏度: < 1.5 mV/m. Selectivity 选择性: 20 dB (S/N). Set audio output 额定功率: 150 mW. Electric power consumption 电源消耗 at zero signal 零信号: 15 mA, at max. it is 100 mA. The IF 中频频率 is most probably 465 kc. Loudspeaker impedance is 8 ohm. 7 transistors are for reception and one (3CK3) for the power supply. 2 diodes plus one (2CW14) for the power supply.
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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