Changfeng 长风 CF-3

Shanghai 上海华丰无线电厂 Shanghai Huafeng Radio Factory; Shanghai

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  • Year
  • 1972 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 181910

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

 Technical Specifications

  • Number of Transistors
  • 10
  • Main principle
  • Superheterodyne (common); ZF/IF 465 kHz; 4 AF stage(s)
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast and Short Wave (SW).
  • Power type and voltage
  • Alternating Current supply (AC) / external 9V DC or AC 220 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • from Radiomuseum.org
  • Model: Changfeng 长风 CF-3 - Shanghai 上海华丰无线电厂 Shanghai
  • Shape
  • Tablemodel, low profile (big size).
  • Notes
  • The radio model Changfeng 长风 CF-3 ("high wind") offers the following key features 主要性能: Frequency range 频率范围: broadcast 535 - 1605 kc and SW 3.9 - 12 mc. Sensitivity 灵敏度: < 0.5 mV/m. Selectivity 选择性: > 20 dB S/N. Set audio output 额定功率: 300 mW (600 mW). Electric power consumption 电源消耗 at zero signal 零信号: 20 mA, at max. it is 150 mA. The IF 中频频率 is most probably 465 kc. Loudspeaker impedance is 8 ohm. See also term: 不失真功率 not distorted audio output : 大 于Larger than 250 mW. The IF 中频频率 is most probably 465 kc. Loudspeaker impedance is probably 8 ohm. 11 diodes, 5 of them for the power supply including transistor 10 (3AX81B). There is a socket for external 9 V DC.
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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