Songhuajiang 松花江 740A-1

Hangzhou No.4 杭州无线电四厂 Hangzhou No.4 Radio Factory; Hangzhou

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  • Year
  • 1972 ??
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 181093

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 / 4.5 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
  • Material
  • Plastics (no bakelite or catalin)
  • from Radiomuseum.org
  • Model: Songhuajiang 松花江 740A-1 - Hangzhou No.4 杭州无线电四厂
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 120 x 70 x 34 mm / 4.7 x 2.8 x 1.3 inch
  • Notes
  • The model Songhuajiang 松花江 740A-1 (Songhua River) has the following key features 主要性能: Frequency range 频率范围: broadcast band 535 - 1605 kc. Set audio output 额定功率: 100 mW. The IF 中频频率 is most probably 465 kc. Loudspeaker impedance is 8 ohm. 3 diodes. See also model 740A (and here the picture shows also 740A only, but the documentation is for 740A-1. Other transistors etc.
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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