Powerstat Variable Autotransformer (Variac) by Superior Electric USA, Type 126, Input: 120 vac, Output 0-140 vac. 15 amps, KVS 2.1, with User Manual, in Excellent Condition and Fully Functional, priced to sell for $185.00.
Robust with precise voltage control, suitable for continuous-use in test-bench, laboratory, and commercial environments.
Uses for a Variac: Soft-Starting Vintage Tube Electronics, Testing a repaired electronic device, Powering up an old radio or amplifier, Hot-wire cutting of Styrofoam, Dimming incandescent lighting, Changing fan speed over a narrow range, Compensating for line voltage drop in AC power applications, Adjusting the voltage of an AC power supply.