Tektronix Type M plug-in unit Tested Works

Tektronix Type CA Dual-Trace Calibrated Preamp Plug-In W/Manual

Tektronix TR503 Tracking Generator Plug-in for the TM500 System, 0.1 to 1800 MHz

Tektronix Type D Plug In Unit High Gain Works

Tektronix Type 1A5 Plug-In Unit Oscilloscope

Tektronix 7M13 Readout Unit Plug In

Tektronix Type 60 Tube Amplifier Plug In Unit - Untested

Tektronix 1A5 Differential Amplifier Plugin for 500 Series Oscilloscope AS-IS