Songhuajiang 松花江 7404 later factory

Harbin No.4 哈尔滨无线电四厂 Harbin No.4 Radio Factory; Harbin (Heilongjiang, NE)

Data
Forum
Pictures
Collections

  • Year
  • 1972 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 181096

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
  • 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)
  • from Radiomuseum.org
  • Model: Songhuajiang 松花江 7404 [later factory] - Harbin No.4 哈尔滨无线电四厂
  • Shape
  • Tablemodel, low profile (big size).
  • Notes
  • The radio model Songhuajiang 松花江 7404 (Songhua River) has the following key features 主要性能: Frequency range 频率范围: broadcast band 535 - 1605 kc. Sensitivity 灵敏度: < 1.5 mV/m. Selectivity 选择性: 20 dB N/S. Set audio output 额定功率: 150 mW. Electric power consumption 电源消耗 at zero signal 零信号: is not given. The IF 中频频率 is most probably 465 kc. Loudspeaker impedance is probably 8 ohm. 5 diodes. The manual 03 lists this model together in the same documentation on page 196 with Songhuajiang 松花江 7403, 7404 and 7404B. 7404B (and perhaps also the others) has been made also by an other factory.
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

 Collections | Museums | Literature

 Forum