What This BNC Adapter Does in the RF Path
The 31-9-RFX: It is a same-series gender-changer, not a between-series converter — both ends are BNC interfaces with bayonet-lock fastening. The right-angle body lets the cable exit perpendicular to the adapter axis, useful where a straight adapter would force a bend radius violation or crowd adjacent ports.
A 50 Ohm adapter inserted into a 50 Ohm line keeps the characteristic impedance continuous. The 4 GHz max frequency covers cellular, Wi-Fi, broadcast TV, and instrumentation signals.
Mechanical Construction and Mating Cycle Life
The body is machined brass with a nickel finish — nickel provides good corrosion resistance and a consistent surface for the bayonet-lock coupling nut to engage. The center contacts are gold-plated: the male pin is beryllium copper (spring temper for repeated mating), the female socket is brass.
