• Country
• People's Republic of China

• Manufacturer / Brand
• Shanghai No.2 上海无线电二厂 Shanghai No.2 Radio Factory; Shanghai

• Year
• 1968 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 178136

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

• Number of Transistors
• 14

• Semiconductors
• 3AG1E 3AG1E 3AG1E 3AG1E 3AG1D 3AG1D 3AG1D 3AX31E 3AX31E 3AX31D 3AX31D 3AX31B 3AX81 3AX81 2AP9

• Main principle
• Superhet with RF-stage; ZF/IF 465 kHz; 3 AF stage(s)

• Tuned circuits
• 8 AM circuit(s)

• Wave bands
• Broadcast plus more than 2 Short Wave bands.

• Power type and voltage
• Dry Batteries / 9 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Hongdeng 红灯 733-1 - Shanghai No.2 上海无线电二厂

• Shape
• Portable set > 8 inch (also usable without mains)

• Notes
• The model Hongdeng 红灯 733-1 (Red Lantern) has the following key features 主要性能: Frequency range 频率范围: broadcast band 525 - 1605 kc and the following SW bands: 2 - 4.5 MHz, 4.5 - 10 MHz, 10 - 16 MHz and 16 - 22 MHz. The IF is most probably 465 kc. Sensitivity 灵敏度: < 0.5 mV/m. Selectivity 选择性: > 36 dB S/N. Set audio output 额定功率: 500 mW. Loudspeaker is 8 ohm, 4 x 6 inch of size. 1 diode. See also manual 03, page 372.

• Source of data
• 03-Transistor Radio Circuit Manual 1981 August (1 of 5)

• Mentioned in
• 16-Radio Manual Shanghai No.2 Radio Factory, 1981 (71 pages) (page 18.)

• Literature/Schematics (1)
• 02-Radio Manual unknown date, 380 pages (page 120 (and 121).)

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

• Other Models

• Here you find 67 models, 64 with images and 40 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Shanghai No.2 上海无线电二厂 Shanghai No.2 Radio Factory; Shanghai