RG400 cable

Cable

RG400

PL259 UHF Male

End A

PL259 UHF Male

$3.00

TNC FEMALE

End B

TNC FEMALE

$1.00

50 Ohm DC – 300 MHz

RG400 — PL259 UHF Male to TNC FEMALE

Custom RG400 cable assembly with PL259 UHF Male and TNC FEMALE connectors. Every cable is hand-assembled, tested, and ships free.

Length Price
1 ft $12.99
6 ft $27.99
25 ft $84.99
50 ft $159.99
100 ft $309.99
250 ft $759.99
Need a different length? Use the Cable Builder

Specs Summary

CableRG400
Diameter.195 INCH
Impedance50 Ohm
FrequencyDC – 300 MHz
Velocity Factor70%
PL259 UHF Male InterfaceUHF threaded (PL-259 / SO-239)
TNC FEMALE InterfaceTNC threaded (MIL-STD-348)

About This Assembly

RG400 Cable

RG-400 is a double-shielded, silver-plated PTFE coaxial cable built to MIL-C-17 specifications with a 0.195" outer diameter. Its construction mirrors RG-142 but with two braid shields for even greater shielding effectiveness. The standard cable for military and avionics applications requiring certified materials and traceable performance.

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.

TNC Connector

TNC (Threaded Neill–Concelman) is the threaded version of BNC, offering improved performance up to 11 GHz and better vibration resistance through its screw coupling. It is commonly used in mobile radio antennas, avionics, and outdoor installations where BNC's bayonet lock would not provide sufficient mechanical security.

Common Applications

This TNC and UHF cable assembly is well suited for military-spec RF interconnects and avionics signal routing. The combination of reliable TNC 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 RG400 Configurations

PL259 UHF Male to TNC FEMALE on Other Cables