The Fasel inductor, also known as a filter choke, is a type of inductor that is used in audio electronics applications, particularly in guitar effects pedals and other musical instrument amplifiers. It is named after its inventor, Roger Fasel, who developed it in the 1960s.
The Fasel inductor is a variable inductor, which means that its inductance can be adjusted by changing the position of a movable core within the inductor. This allows for the creation of a variety of different sounds, from smooth and mellow to bright and aggressive.
Fasel inductors are typically used in wah-wah pedals, where they are used to control the frequency of the wah effect. They are also used in other effects pedals, such as overdrive pedals and distortion pedals, where they can be used to shape the tone of the guitar signal.
The Fasel inductor is a unique and versatile component that can be used to create a wide variety of different sounds. It is an essential component for many guitar effects pedals and other musical instrument amplifiers.