This is the Sola transformer, a design that provides a very constant output voltage even when the input voltage and the load varies. Input and output voltages can be wired for 120 or 240 V. ...
DEC H7225-BF 2500 VA Constant Voltage Power Conditioner - Untested - As Is Input 120V 19 A Output 120 V 16.7 A Condition: For Parts or Not WorkingThis used po
