Tektronix DM502A / Opt: 02 Autoranging DMM Plug-In

Tektronix Type L Plug-in - Fast Rise Calib Preamp O Scope 500 Series Untested!

1970s Tektronix Model TM-500 Series Modular Unit 70s TM500 Multimeter Oscillator

Tektronix PS501-1 DC Power Supply Plug-In (0-20V/0-400mA, 5V/1A)

Tektronix TM504 | Very Good Condition

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

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

Tektronix Type 1A2 Plug-in - Dual Trace for Oscilloscope 500 Series