• Country
• People's Republic of China

• Manufacturer / Brand
• Tianjin 天津长城无线电厂 Tianjin Great Wall Radio Factory; Tianjin City (Tianjin, N)

• Year
• 1968 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 177773

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

• Number of Transistors
• 7

• Semiconductors
• 3AG1 3AG1 3AG1 3AX31A 3AX31A 3AX31A 3BX01

• Main principle
• Superheterodyne (common); ZF/IF 465 kHz; 3 AF stage(s)

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast and Short Wave (SW).

• Power type and voltage
• Dry Batteries / 4 x 1.5 Volt

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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Changcheng 长城 J701 - Tianjin 天津长城无线电厂

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

• Notes
• The model Changcheng 长城 J701 receives broadcast 535 - 1605 kc. The IF frequency is 465 kc. The 7th transistor is a 3BX01.

• Literature/Schematics (1)
• 02-Radio Manual unknown date, 380 pages (page 22.)

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

• Other Models

• Here you find 17 models, 9 with images and 16 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Tianjin 天津长城无线电厂 Tianjin Great Wall Radio Factory; Tianjin City (Tianjin, N)