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> General radio type M20 variac 20 amp 400HZ
General radio type M20 variac 20 amp 400HZ
General Radio Variac type M20, used pulled from working equipment.
I believe it is nine inches diagonally, on center, for the mounting holes. Dial is five inches in diameter. Item is a little dirty, decent physical condition.
Item is labeled 350 cycles minimum. I believe the variac is to be used with a 400 Hz system.