KT90 refers to a type of vacuum tube, specifically a beam power pentode tube used in audio and other electronic applications. It's known for its ability to deliver high power and is often used in audio amplifiers, specifically in hi-fi audio equipment. The KT90 is part of a family of tubes that includes other variants like the KT88 and KT77, but it is characterized by its own specific electrical and performance specifications.
New to topics? Read the docs here!