Description

This object is a vacuum tube with a glass envelope, two 4-pin white plastic bases on either side, and metal pieces attached to the cavity resonators.

Klystrons are linear beam vacuum tubes used as amplifiers for high radio frequencies from UHF up into the microwave range. The tube was invented by Russell and Sigurd Varian in 1937, who wanted to develop a way to use microwaves to detect airplanes flying under cloud cover or at night. This technology was used by the United States and Great Britain during World War II to create radar equipment light enough to fit on an aircraft. The name Klystron was trademarked by the Sperry Gyroscope Company in 1944.