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Songhuajiang 松花江 740A-1

Songhuajiang 松花江 740A-1; Hangzhou No.4 杭州无... (ID = 817895) Radio
 
Songhuajiang 松花江 740A-1; Hangzhou No.4 杭州无... (ID = 817896) Radio
Songhuajiang 松花江 740A-1; Hangzhou No.4 杭州无... (ID = 814877) Radio
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Songhuajiang 松花江 740A-1; Hangzhou No.4 杭州无... (ID = 814877) Radio
Hangzhou No.4 杭州无...: Songhuajiang 松花江 740A-1 [Radio] ID = 814877 596x491
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For model Songhuajiang 松花江 740A-1, Hangzhou No.4 杭州无线电四厂 Hangzhou No.4 Radio Factory; Hangzhou:
Picture from the Transistor Radio Circuit Manual August 1981 vol. 1 of 5 (internal 03), page 194 for reference when somebody is uploading real photos and as reference for collectors, comparing models.
 
Country:  People's Republic of China
Manufacturer / Brand:  Hangzhou No.4 杭州无线电四厂 Hangzhou No.4 Radio Factory; Hangzhou
Year: 1972 ?? Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) 7: 3AG1D 3AG1B 3AG1D 3AX31B 3AX31B 3AX31B 3AX31B 2CK 2CK 2AP9
Main principle Superheterodyne (common); ZF/IF 465 kHz; 3 AF stage(s)
Tuned circuits 5 AM circuit(s)
Wave bands Broadcast only (MW).
Details
Power type and voltage Dry Batteries / 4.5 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
Power out
from Radiomuseum.org Model: Songhuajiang 松花江 740A-1 - Hangzhou No.4 杭州无线电四厂
Material Modern plastics (no Bakelite or Catalin)
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.
Literature/Schematics (1) 03-Transistor Radio Circuit Manual 1981 August (1 of 5) (page 194.)

Model page created by Ernst Erb. See "Data change" for further contributors.



All listed radios etc. from Hangzhou No.4 杭州无线电四厂 Hangzhou No.4 Radio Factory; Hangzhou
Here you find 6 models, 6 with images and 6 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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