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History of the manufacturer  

Nanjing 南京工学院无线电厂 Nanjing Engineering Faculty Radio Factory; Nanjing

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Name: Nanjing 南京工学院无线电厂 Nanjing Engineering Faculty Radio Factory; Nanjing    (PRC)  
Abbreviation: nanjingEng
Products: Model types
Summary:

Nanjing Engineering Faculty Radio Factory; Nanjing 南京工学院无线电厂: Brands: 5.7.

History:

Nanjing Engineering Faculty Radio Factory; Nanjing 南京工学院无线电厂:

南京 Nanjing is the capital of Jiangsu province (Kiangsu) 江苏 in simplified Chinese - in southeast China, abbreviation 蘇|苏, Mandarin Jiāng​sū and traditional Chinese ​江蘇.

Brands:
"5.7" = "The 7th of May". For instance the early transistor radio "5.7"-301. We don't know if that has to do with the 7th of May, when the troops of general Christian De Castries were destroyed and demoralized in the French War of Indochina - or with something else.


Some models:
Country Year Name 1st Tube Notes
PRC  66 WuQi 5.7 -2 3AG1D  The radio model WuQi 5.7-2 has broadcast (as all at that time from 535 - 1605 kHz) and SW ... 
PRC  66 5.7 The 7th of May 301 3AG51  The brand of this radio is 5.7 which corresponds to "The 7th of May". Jingtiguan Shouyinji... 

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