• Country
• People's Republic of China

• Manufacturer / Brand
• Shanghai 上海群益无线电厂 Shanghai Qunyi Radio Factory; Shanghai

• Year
• 1968 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 178118

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

• Number of Transistors
• 7

• Semiconductors

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

• Tuned circuits
• 5 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Dry Batteries / 3 Volt

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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Hudie 蝴蝶 H757 - Shanghai 上海群益无线电厂

• Notes
• The model Hudie 蝴蝶 H757 (Butterfly) has the following key features 主要性能: Frequency range 频率范围: broadcast band 535 - 1605 kc. Sensitivity 灵敏度: < 1 mV/m. Selectivity 选择性: > 20 dB (10 kc). Set audio output 额定功率: 100 mW (350 mW). The IF is 465 kc. Loudspeaker impedance is 16 ohm. 4 or 5 diodes. Manual 03 lists 5 diodes - but claims it wrongly as Hudie 蝴蝶 757 and manual 02 lists 4 - plus loudspeker 10 ohm or not well readable.

• Literature/Schematics (1)
• 02-Radio Manual unknown date, 380 pages (page 132.)

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

• Other Models

• Here you find 7 models, 4 with images and 7 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Shanghai 上海群益无线电厂 Shanghai Qunyi Radio Factory; Shanghai