radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

Songhuajiang 松花江 7404 later factory

Songhuajiang 松花江 7404; Harbin No.4 哈尔滨无... (ID = 817899) Radio
 
Songhuajiang 松花江 7404; Harbin No.4 哈尔滨无... (ID = 817900) Radio
Songhuajiang 松花江 7404; Harbin No.4 哈尔滨无... (ID = 814879) Radio
Use red slider bar for more.
Songhuajiang 松花江 7404; Harbin No.4 哈尔滨无... (ID = 814879) Radio
Harbin No.4 哈尔滨无...: Songhuajiang 松花江 7404 [Radio] ID = 814879 617x577
Select picture or schematic to display from thumbnails on the right and click for download.
For model 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):
Picture from the Transistor Radio Circuit Manual August 1981 vol. 1 of 5 (internal 03), page 196 for reference when somebody is uploading real photos and as reference for collectors, comparing models.
 
Country:  People's Republic of China
Manufacturer / Brand:  Harbin No.4 哈尔滨无线电四厂 Harbin No.4 Radio Factory; Harbin (Heilongjiang, NE)
Year: 1972 ?? Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) 7: 3AG1B 3AG1B 3AG1B 3AX31B 3AX31B 3AX31B 3BX31B 2AP9 2AP9 2AP9 2CK 2CK
Main principle Super-Heterodyne (Super in general); 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 / 6 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
Power out
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.
Literature/Schematics (1) 03-Transistor Radio Circuit Manual 1981 August (1 of 5) (page 196.)

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



All listed radios etc. from Harbin No.4 哈尔滨无线电四厂 Harbin No.4 Radio Factory; Harbin (Heilongjiang, NE)
Here you find 3 models, 3 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
rmXorg