Hongdeng 红灯 781
Shanghai No.2 上海无线电二厂 Shanghai No.2 Radio Factory; Shanghai
- 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
- 1974 ??
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 179334
- Number of Transistors
- 7
- 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 / 3 Volt
- Loudspeaker
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 3 inch = 7.6 cm
- Material
- Plastics (no bakelite or catalin)
- from Radiomuseum.org
- Model: Hongdeng 红灯 781 - Shanghai No.2 上海无线电二厂
- Shape
- Portable set > 8 inch (also usable without mains)
- Notes
- Hongdeng 红灯 781 (Red Lantern - Hongdeng is written on the model) receives broadcast band 525 - 1605 kHz and SW 3.2 - 12 MHz. Hongdeng 781 has a sensitivity 灵敏度 of: < 1.5 mV/m. Selectivity 选择性: > 20 dB S/N. Set audio output 额定功率: 150 mW (500 mW). The IF 中频频率 is most probably 465 kc. The loudspeaker is 8 ohm. 3 diodes.
- Literature/Schematics (1)
- 16-Radio Manual Shanghai No.2 Radio Factory, 1981 (71 pages) (page 41.)
- 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