Meiduo 美多 Transistor ST2-1-1

Shanghai 上海无线电器材厂 Shanghai Radio Equipment Factory, Shanghai (E)

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  • Year
  • 1959
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 180751

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

 Technical Specifications

  • Number of Transistors
  • 7
  • Main principle
  • Superheterodyne (common); ZF/IF 455 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: Meiduo 美多 Transistor ST2-1-1 - Shanghai 上海无线电器材厂
  • Shape
  • Very small Portable or Pocket-Set (Handheld) < 8 inch.
  • Dimensions (WHD)
  • 270 x 160 x 92 mm / 10.6 x 6.3 x 3.6 inch
  • Notes
  • The Transistor Radio model Meiduo 美多 Transistor ST2-1-1 receives the broadcast band 530 - 1600 kc. It is the first transistor Radio which was produced in quantities and was developed and made in China - except the transistors and some special parts. Right for the eve of the 10th anniversary of National Day 1959, Shanghai Radio Equipment Factory made the first production of 300 units of model ST2-1-1, using 7 transistors and a diode. The first time, realized the commercialization of China-made transistor radios for the market. See also the previous sample of a possible transistor radio made in China.

    Here in short about the following, "fully China" made transistor radio:
    In Summer 1958, the "Harbin Xinsheng Kaiguan Factory" 哈尔滨新生开关厂 (by the way: 开关 means switch / breaker), a manufacturer in Harbin, North East China, got the job to develop a modern pocket transistor radio with all the parts necessary for producing a full China designed and produced transistor radio. The production then was given to "Harbin 4th Wireless Factory". This first fully China made transistor radio from September 1958 (prototype only - without the number and slightly different case) was called in 1960 Songhuajiang 松花江 601 and could be sold from 1960 on for a few years with changing transistors. Very astonishing is the short time for development - including transistors and the tiny peaces etc. Many difficutlies had to overcome. See an article about the first transistor radios in China in the forum.
  • Author
  • Model page created by Ernst Erb. See "Data change" for further contributors.

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