RG178 cable

Cable

RG178

BNC FEMALE

End A

BNC FEMALE

$2.00

RP-TNC MALE

End B

RP-TNC MALE

$1.00

50 Ohm DC – 3 GHz

RG178 — BNC FEMALE to RP-TNC MALE

Custom RG178 cable assembly with BNC FEMALE 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 – 3 GHz
Velocity Factor69%
BNC FEMALE InterfaceBNC bayonet (MIL-STD-348)
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.

BNC Connector

BNC (Bayonet Neill–Concelman) is a quick-connect RF connector featuring a bayonet locking mechanism for fast mating and unmating, rated from DC to 4 GHz. Its ease of use makes it standard in test and measurement equipment, video distribution, two-way radio accessories, and laboratory bench setups where cables are frequently connected and disconnected.

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 BNC and RP-TNC cable assembly is well suited for ultra-compact internal wiring in test equipment and small wireless modules. The combination of reliable BNC 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

BNC FEMALE to RP-TNC MALE on Other Cables