This auction is for an Alliance U-98 Tenna Rotor System.  It currently does not turn due to ancient solidified white grease.  When hooked up to the control box you can hear it trying to turn, slightly different hum for each direction.  I do not have the time to clean or make a decision on the appropriate grease to use.  Should be very straight forward to resurrect.  The internal parts show very little signs of wear, suspect it was never used.  There is a place on the Web called Norms Rotor Repair that sells parts if needed.  Shipping in two medium USPS Flat Rate boxes.