RG178 cable

Cable

RG178

MCX MALE

End A

MCX MALE

$1.00

PL259 UHF Male

End B

PL259 UHF Male

$3.00

50 Ohm DC – 300 MHz

RG178 — MCX MALE to PL259 UHF Male

Custom RG178 cable assembly with MCX MALE and PL259 UHF Male connectors. Every cable is hand-assembled, tested, and ships free.

Length Price
1 ft $7.99
6 ft $10.49
25 ft $19.99
Need a different length? Use the Cable Builder

Specs Summary

CableRG178
Diameter1.75MM
Impedance50 Ohm
FrequencyDC – 300 MHz
Velocity Factor69%
MCX MALE InterfaceMCX snap-on (CECC 22220)
PL259 UHF Male InterfaceUHF threaded (PL-259 / SO-239)

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.

MCX Connector

MCX (Micro Coaxial) is a snap-on RF connector approximately 30% smaller than SMB, designed for compact equipment requiring frequent connections in a small footprint. Rated to 6 GHz, MCX is commonly used in GPS receivers, automotive telematics modules, handheld communication devices, and compact measurement instruments.

UHF Connector

The UHF connector (also known as PL-259 male / SO-239 female) is a large, low-cost RF connector designed in the 1930s for HF and VHF frequencies. Despite its name, its practical usable range is below 300 MHz due to its non-constant impedance design. It remains extremely popular in amateur radio (HF through VHF), CB radio, and marine radio applications.

Common Applications

This MCX and UHF cable assembly is well suited for ultra-compact internal wiring in test equipment and small wireless modules. The combination of reliable MCX and UHF 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

MCX MALE to PL259 UHF Male on Other Cables