GT-21 DC MOTOR CONTROLLER MADE BY GERALD K HELLER COMPANY, LAS VEGAS. MADE FOR SERIES WOUND DC MOTORS .WITH THE FIELD AND ARMATURE WINDING INTERNALLY INSIDE THE CONTROL HOUSING. IN MOST CASES PIN 1 AND 2 ARE ARMATURE AND 3 AND 4 ARE FIELD AND GROUND GOING TO A TAB ON THE CONTROL HOUSING NEAREST THE MOTOR PLUG RECEPTACLE. THE CONTOL OUTPUT VOLTAGE IS ADJUSTABLE FROM 0 TO 130VDC, WITH A 1/40 HP RATED WOUND FIELD DC MOTOR ATTACHED. THE CONTOLLER WILL OPERATE PROPERLY EVEN IF THE AC MAIN VOLTAGE FLUTUATES BETWEEN 108-132 VAC AND WILL HOLD SET POINT UNDER THESE FLUCTUATIONS OF LINE VOLTAGE. USED IN EXCELLENT WORKING CONDITIONS. NO RESERVE.
OFFERED BY PHOTO-GRAPHIC SYSTEMS. 505-247-9780. DEALING IN USED PHOTO EQUIPMENT FOR OVER 20 YEARS. ALL ITEMS ARE CAREFULLY DESCRIBED AND ARE IN EXCELLENT WORKING CONDITION. WE DO NOT CHARGE FOR PACKING OR MATERIALS. JUST WHAT IT COSTS TO SHIP IT TO YOU. CHECK OUT OUR WEB SITE . SORRY NO FOREIGN PAYPAL. PAYPAL, VISA, MC AND CHECKS, NO SHIPPING TO UNCONFIRMED ADDRESS. SHIPPING IS USPS.

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