RG178 cable

Cable

RG178

FME MALE

End A

FME MALE

$2.00

RP-TNC MALE

End B

RP-TNC MALE

$1.00

50 Ohm DC – 2 GHz

RG178 — FME MALE to RP-TNC MALE

Custom RG178 cable assembly with FME MALE and RP-TNC MALE connectors. Every cable is hand-assembled, tested, and ships free.

Length Price
1 ft $6.99
6 ft $9.49
25 ft $18.99
Need a different length? Use the Cable Builder

Specs Summary

CableRG178
Diameter1.75MM
Impedance50 Ohm
FrequencyDC – 2 GHz
Velocity Factor69%
FME MALE InterfaceFME threaded
RP-TNC MALE InterfaceReverse polarity TNC threaded

About This Assembly

RG178 Cable

RG-178 is an extremely thin 50-ohm coaxial cable measuring just 1.75mm in diameter, designed for space-constrained RF assemblies. Its PTFE dielectric and silver-plated conductors deliver reliable performance from DC up to several GHz. Commonly used for internal wiring in test equipment, medical devices, and cellular module pigtails.

FME Connector

FME (For Mobile Equipment) is a miniature threaded RF connector designed for mobile and vehicle-mounted antenna applications, particularly at GSM, CDMA, and FM frequencies. Its small size and robust threaded coupling make it common on vehicle-mount antenna mounts, cellular signal boosters, and mobile broadband modems.

RP-TNC Connector

RP-TNC (Reverse Polarity TNC) uses the TNC threaded shell with reversed pin conventions, similar to RP-SMA. It is used on some commercial WiFi access points and outdoor CPE antennas, particularly in older Cisco and Linksys equipment, and offers better vibration resistance than RP-SMA in demanding outdoor environments.

Common Applications

This FME and RP-TNC cable assembly is well suited for ultra-compact internal wiring in test equipment and small wireless modules. The combination of reliable FME and RP-TNC connectors and custom-cut cable length makes it a practical choice for both field installations and bench setups. Every assembly is hand-terminated, continuity tested, and ships free within the USA.

Other RG178 Configurations

FME MALE to RP-TNC MALE on Other Cables