sold as seen The Vintage Curtis regulator 10 ohm 4a is a Linear Rheostat with a resistance rating of 2.2 ohms. It is a passive component that is commonly used in electronic circuits to control the flow of current. The Curtis regulator brand is known for producing high-quality electronic components, making this a reliable choice for various industrial and commercial applications. Whether used in a laboratory setting, in a manufacturing process, or for controlling the brightness of a lamp, this vintage regulator offers precise and efficient control of electrical current.