PRD Electronics Type 650-B Universal Power Bridge Operating Instruction 1961

PRD Electronics Type 6690-A Peak Power Meter Operating Instructions 1972

PRD Type 812 Universal Klystron Power Supply Operating Instructions 1961

PRD Electronics Type 965 Electronic Counter Operating Instructions 1964

PRD Types 219, 219-H, 219-L Standing Wave Detectors Operating Instructions 1960

PRD Electronics Type L712 & S712 Signal Sources Operating Instructions 1962

Edison Electronics Model 159RF Megacycle Meter Operating Instructions 1968

Polytechnic Research PRD Type 219 Standing Wave Indicator Operating Instructions