Tube tester

A tube tester is an electronic instrument designed to test certain characteristics of vacuum tubes (thermionic valves). Tube testers evolved along with the vacuum tube to satisfy the demands of the time, and this evolution faded with the tube era, yet with the High-End advent, they became a pricey piece of equipment. The first tube testers were simple units designed for specific tubes to be used in the battle fields of World War I by radio operators, so they could easily test the tubes of their communication equipment.

Types of tube testers