It also features a two-way power supply system comprising a phantom power supply and a battery (006P). This equipment employs, in the head amplifier, a low intermodulation distortion circuit applying FET, which realizes a sound pickup effect with low distortion even at a high volume input. This unit underwent minor changes to become C-38B in 1970. It was possible to check its operation by connecting the grid to the plate for use as a triode tube, which allowed the mass-production of C-37A.Ĭ-38 was released in 1958 as its younger brother, inheriting such specifications on-board the C-37A as the -8 dB PAD and low-cut. However, since this was high-cost to mass-produce, C-37A employed a pentode vacuum tube called 6AU6.

Vacuum tubes with low noise were employed in condenser microphones at the time, and mainstream German microphones employed the triode AC701. On the verge of the Tokyo Olympic Games in 1964, he conducted research and development of a variety of equipment and was also involved in the prototyping of condenser microphones as the general manager of Sony's commercial audio equipment development. Heitaro Nakajima, led the production of C-37A. C-37A, introduced in 1958, became the first domestic vacuum tube condenser microphone, and also this became the first of Sony's professional products.ĭr. While working on microphones for recorders, Sony became the first domestic company to delve into the field of condenser microphones, which, at the time, was overwhelmed by foreign products. Manufacture of transistors was also going strong by the time they changed our company name to 'Sony Corporation' in 1957, and the 'Sony' brand name had already spread widely around the world. Around the time of its founding, business around tape recorders was the driving force behind Tokyo Telecommunications Engineering Corporation.

Sony audio studio