Sony TR-55

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The Sony TR-55 is the name of a transistor radio from the Sony company (at that time still under the name Tōkyō Tsūshin Kōgyō Kabushiki Kaisha , TTK). Released in 1955, it was the first commercially available transistor radio from Sony and the first to be made in Japan .

description

The use of transistors instead of electron tubes makes it possible to manufacture electrical circuits much smaller, which means that the size of devices such as radios also became significantly smaller, so that the manufacture of portable radios was possible for the first time.

The TR-55 used five transistors that were designed and manufactured by Sony. A technology from Bell Labs was licensed for this purpose. This made Sony the first company to produce transistor radios from the ground up. Regency , who launched the Regency TR-1 a year earlier , were still using transistors they bought from Texas Instruments .

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Individual evidence

  1. ↑ Aaron Frisch: The Story of Sony . In: Built for success . Smart Apple Media, 2003, ISBN 1-58340-296-9 , pp. 10 .
  2. ↑ a b Wolfgang Drescher: Akio Morita . In: The Most Successful Entrepreneurs . Campus Verlag, 2005, ISBN 3-593-37820-5 , pp. 56 .