Polytechnic Research PRD Type 809 Klystron Power Supply Operating Instruction

Polytechnic Research PRD Type 277A Standing Wave Amplifier Operating Instruction

Polytechnic Research PRD Type 277 Standing Wave Amplifier HandBook & Operation

Polytechnic Research PRD Type 219 Standing Wave Indicator Operating Instructions

Polytechnic Research PRD Type 650-B Universal Power Bridge Instructions 1956

Bowmar/Ali Type 709-A Broadband Secondary Phase Standard Instruction Manual

Microdot Model 1901A Voltage Breakdown Tester Instruction Manual IM 1094

Farnell LFM3 Broadband Test Oscillator Instruction Book