Tektronix Type 491 Spectrum Analyzer Front Panel Knobs, Controls, and Parts

Tektronix Type R 491 Spectrum Analyzer Rack Handles

Tektronix Type R 491 Spectrum Analyzer 2-Set Screw Knobs

Tektronix Type R 491 Spectrum Analyzer Clear Connector Cord 11" W/Gold Fittings

HP 8552B Spectrum Analyzer Front Panel NEW!

Tektronix Type R 491 Spectrum Analyzer Release Wave Guide

Tektronix Type R 491 Spectrum Analyzer Module Model F6128-5

Tektronix Type R 491 Spectrum Analyzer RF Inputs Pt.# 119-0064-00