RK2K25 Klystron (cavity reflex) Raytheon

This cavity reflex klystron tube, the 2K25 or 723A/B (also called a Shepard tube design) was the heart of X-band (8.6-9.5 GHz) radars during WWII and was used in marine radar sets well into the '70's. Used for the local oscillator tube, this unit also saw service in many microwave trainer kits used for educational service. Made by Raytheon, painted "microwave blue" paint, used on most of Raytheons microwave tubes such as klystrons and magnetrons. 8.5 to 9.7GHz reflex klystron, 25mW output through a small coaxial probe from the octal base. Improved design 723A/B. NSN: 5960-00-359-7768 NOS (New Old Stock) part! (untested)