Microwave power amplifiers containing ‘vacuum electronic devices’ specified above and having all of the following: (a) Operating frequencies above 3 GHz; (b) An average output power to mass ratio exceeding 80 W/kg; and (c) A volume of less than 400 cm 3 ; Note : This category does not apply to equipment designed or rated for operation in any frequency band which is ‘allocated by the International Telecommunication Union (ITU)’ for radio communications services, but not for radio determination.

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• ‘Detectors’ specially designed or modified to protect rocket systems and unmanned aerial vehicles against nuclear effects (e.g. Electromagnetic Pulse (EMP), X-rays, combined blast and thermal effects), and usable for the systems specified in 1.A.Technical Note:A ‘detector’ is defined as a mechanical, electrical, optical or chemical device that automatically identifies and records, or registers a stimulus such as an environmental change in pressure or temperature, an electrical or electromagnetic signal or radiation from a radioactive material. This includes devices that sense by one time operation or failure.
• “Radiation Hardened”“microcircuits” usable in protecting rocket systems and unmanned aerial vehicles against nuclear effects (e.g. Electromagnetic Pulse (EMP), X-rays, combined blast and thermal effects), and usable for the systems specified in 1.A.