Tektronix DP501 Digital Prescaler Plug In Module, UNTESTED, AS-IS

Tektronix DD 501 Digital Delay plug-in for the TM500 System

Tektronix TM506 Chassis Mainframe Module for TM500 Test Measurement System

TEKTRONIX SG 502 OSCILLATOR PLUG-IN MODULE FOR TM500 SINE/SQUARE

Tektronix AM 502 Differential Amplifier Plugin Module

TEKTRONIX TM502A 2-Slot Plug-In Mainframe Tested and Working

TEKTRONIX 016-0362-02 Tool Box Blank Slot Plug-In for TM-502 7000 scopes, etc.

Tektronix AM 503 Current Probe Amplifier Plug-In for TM500 System 667788