The ECC83S is a type of vacuum tube, commonly known as a preamp or preamplifier tube. The tube is also known as a 12AX7 tube, which is the American designation for the tube, while the ECC83S is the European representation.
The ECC83S tube has a high amplification factor and low internal resistance, making it ideal for use in the input and first stages of audio amplifiers. It is also used in many guitar amplifier designs.
The tube was first introduced by RCA in 1947 and has been widely used ever since. The "S" in ECC83S stands for "Selected" which means that the tube has undergone additional factory testing to ensure that it meets specific quality standards.
Overall, the ECC83S is a popular and reliable preamp tube that has been widely used in the audio industry for over 70 years.
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