• Country
• People's Republic of China

• Manufacturer / Brand
• Shanghai No.4 上海无线电四厂 Shanghai No.4 Radio Factory; Shanghai

• Year
• 1963/1964

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 179610

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

• Number of Tubes
• 4

• Valves / Tubes
• 6А2П 6K4_China 6N1 6Z4_China

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

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• Alternating Current supply (AC) / 110; 220 Volt

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

• from Radiomuseum.org
• Model: Baoshi 宝石 441 - Shanghai No.4 上海无线电四厂

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 313 x 162 x 150 mm / 12.3 x 6.4 x 5.9 inch

• Notes
• The model Baoshi 宝石 441 ("precious stone") receives the broadcast band 535 - 1605 kc.

• Literature/Schematics (1)
• 11-Radio manual (green 2) 1965, with 220 pages. (page 128.)

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

• Other Models

• Here you find 16 models, 15 with images and 8 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Shanghai No.4 上海无线电四厂 Shanghai No.4 Radio Factory; Shanghai