Changzheng 长征 7501

Lanzhou 兰州无线电厂 Lanzhou Radio Factory; Lanzhou (Gansu, NW)

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  • Year
  • 1972 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 180858

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); Reflex
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast plus 2 Short Wave bands.
  • Power type and voltage
  • Line / Batteries (any type) / AC 220 / Battery 9 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Material
  • Wooden case
  • from Radiomuseum.org
  • Model: Changzheng 长征 7501 - Lanzhou 兰州无线电厂 Lanzhou
  • Shape
  • Tablemodel, low profile (big size).
  • Notes
  • The radio model Changzheng 长征 7501 (The Long March) receives broadcast 535 - 1605 kc, SW 3.9 - 8.5 mc and SW 3.5 - 18 mc. Sensitivity 灵敏度: 1 mV/m (1.5 mV/m). Selectivity 选择性: > 20 dB S/N (10 kc at 1000 kc). Set audio output 额定功率: 500 mW (1 Watt). The IF is most probably 465 kc. Loudspeaker is 8 ohm. One transistor 3AX81B is for the power unit as the two 2CP21 and the 2CW3.
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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