TNC Jack for RG-58 and LMR-195 — 50 Ohm, DC to 11 GHz
The Amphenol RF 031-2389-RFX is a TNC jack (female socket) rated for 50 Ohm systems from DC through 11 GHz. The insertion loss holds at 0.18 dB across the band, which means the connector contributes less than a fifth of a dB to the link budget at the top end of its range — a tight figure for a threaded interface at this frequency. It terminates to RG-58, 58A, 58B, 58C, 141, 303, LMR-195, Belden B7806A, and 9907 cable groups, so it covers the common 50 Ohm flexible and semi-rigid coax types used in antenna feeds, test equipment, and base-station jumpers.
What ships in the box — and what doesn't need ordering separately
The kit includes the gasket, lockwasher, and nut for the bulkhead mount. The contact and ferrule are crimp-terminated.
Mating cycles and contact plating — reconnect life
The nickel-plated brass body handles the environmental exposure on a bulkhead mount.
The 031-2367-RFX is the male pin plug version of this same TNC series — same 50 Ohm impedance, same 11 GHz ceiling, same 0.18 dB insertion loss, same 500-cycle rating. The only decision-relevant difference is gender: the 031-2389-RFX is the jack (female socket) for a bulkhead-mounted receptacle, while the 031-2367-RFX is the plug for the cable end. No other spec changes between them.