sabtron 12 AMPS SABTRON SINGLE PHASE VARIABLE TRANSFORMER OPEN TYPE 12 A Rotary Dimmer  (Multicolor)

Variable Sabtron variable transformer wound on a toroidal core and each turn is connectable via carbon brush mounted in moving arm. Rotations of the brush arm by manually, deliver an output voltage from zero to above line voltage transformer wound on a toroidal core and each turn is connectable via carbon brush mounted in moving arm