• Country
• People's Republic of China

• Manufacturer / Brand
• Nanjing 南京无线电仪器厂 Nanjing Radio Apparatus Factory; Zhongshan

• Year
• 1966 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 174342

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• 3

• Semiconductors
• 3AG1D 3AG1D 3AX71B 2AP9 2AP1_Diode

• Main principle
• Superheterodyne (common); ZF/IF 465 kHz; 2 AF stage(s); Reflex

• Tuned circuits
• 4 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 4.5 Volt

• Loudspeaker
• Permanent or electro-dynamic (moving coil), system not known yet.

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Zhongshan 钟山 J302 - Nanjing 南京无线电仪器厂

• Shape
• Very small Portable or Pocket-Set (Handheld) < 8 inch.

• Notes
• Model Zhongshan 钟山 J302 shows a rather simple but intelligent reflex superhet. For adjusting the base current of BG2 for the used transistor in the factory a pontentiometer-trimmer is used.

• Literature/Schematics (1)
• 01-Transistor Radio Manual 1972, 2nd Ed. 2nd Print 1983 (page 6.)

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

• Other Models

• Here you find 3 models, 1 with images and 2 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Nanjing 南京无线电仪器厂 Nanjing Radio Apparatus Factory; Zhongshan