• Country
• People's Republic of China

• Manufacturer / Brand
• Maanshan 马鞍山市无线电厂 Ma'anshan City Radio Factory; Ma'anshan

• Year
• 1968 ??

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 178672

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

• Number of Transistors
• 7

• Semiconductors
• 3AG1C 3AG1C 3AG1C 3AX21 3AX31 3AX31B 3AX31B 2CP 2CP 2AP9

• 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 / 6 Volt

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

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Shanhua 山花 7412 - Maanshan 马鞍山市无线电厂 Ma'

• Notes
• The models Shanhua 山花 748, 7411 and 7412 share the same documentation on page 348b (below). They have the following key features 主要性能: Frequency range 频率范围: broadcast band 535 - 1605 kc. Sensitivity 灵敏度: < 1.5 mV/m. Selectivity 选择性: > 20 dB. The IF 中频频率 is 465 kc. Loudspeaker impedance is 8 ohm. The 5 first transistors are given as either 3DK (?) or 3DG, the output transistors as 3AX31. 4 diodes (2 x 2CP, 2 x 2AP9).

• Literature/Schematics (1)
• 02-Radio Manual unknown date, 380 pages (page 248b, drawing 08.)

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

• Other Models

• Here you find 3 models, 3 with images and 3 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Maanshan 马鞍山市无线电厂 Ma'anshan City Radio Factory; Ma'anshan