Collins Radio Type 51Y ADF Receiver 522-0769-

For precision positioning of heavy loads suspended from above. Applications include the space vehicle, power generation and large scale industries. BMI also carries cranes, check for current inventory. From Hydra Website: “Since 1965, the Hydra Set Load Positioning System has been the gold standard for the precise vertical control of heavy loads over a wide variety of applications and industries. Installed between the crane or hoist and the load, Hydra set is a valuable positioning device that enables the operator to mate and de-mate loads to within .001″. The hydra set eliminates up and down oscillations that can result in damage to the load and support fixtures. ” Del Mar Engineering is now Del Mar Avionics.