The WH148 20K Single Potentiometer is a precision rotary variable resistor used for tuning and adjusting analog signals in electronic devices. It’s ideal for both educational projects and professional control systems. Features Smooth rotary motion for accurate adjustment Linear resistance curve for even control response Durable shaft and casing for extended use Compatible with WH148 knob caps Compact, panel-mount design Applications Audio control (volume, tone, gain) Adjustable power supplies Calibration circuits DIY electronics and learning kits