Federal Television Corporation/ U.S. Army Signal Corps AM-864/U
vintage variable-MU tube limiter (sixties) x3

Military broadcast limiter, four rack spaces tall. Very similar in sonic character to the Teletronix LA-2A tube limiter, but with faster attack and release. Very forward-sounding and three-dimensional with pleasant second-harmonic distortion. Fantastic on a lead vocal and bass. 56-page Army technical manual includes a section on "Demolition To Prevent Enemy Use" and instructions on "Operation Under Unsual Conditions," such as arctic, tropical, and desert climates. These are earlier models with the convex VU meter.