Coaxial n-male type with freq range 0.01 to 18.0 ghz, power range 1 mw to 3 w plus 35 dbm; max pulse energy 3000 w per microsec, max pulse power 1000 w for max pulse duration of 3 microsecs; max vswr 1.35; oper temp minus 54 degs c to positive 85 degs c; o/a dims 5.16 in. Lg, 1.25 in. Dia; for use with power meter amplifier