S-Band tunable cavity Klystron, CV 3815, No.56, c 1950, maker unknown S-Band tunable cavity Klystron valve circa 1950
An early S-Band 2.5Hz reflex Klystron valve, c1940, type G 11596 output 300 mw, maker unknown. An early S-Band 2.5Hz reflex Klystron valve circa 1940