Manually operated regulating unit has regulating stage in form of manually variable inductance and/or capacitance with control stage matched to correspond to hearing

摘要

The unit has a regulating stage in the form of a manually variable inductance (LV) and/or capacitance (CV) with a control stage matched to correspond to hearing. The control stage acts upon a movable iron core of a coil (L) or varies the plate separation distance of a capacitor. The variable inductance and capacitance are coupled via a transformer (T).