UHF Female (SO-239) to UHF Female Adapter

Description

The UHF Female to UHF Female adapter is an “in-series” coupler used to bridge two PL-259 male plugs. The SO-239 (UHF Female) interface is world-renowned for its ruggedness and ease of use in high-power HF and VHF applications. While not a constant-impedance connector, its large physical surface area makes it exceptionally capable of handling high voltage and high wattage without the arcing risks associated with smaller connectors.

These adapters are precision-machined from nickel-plated brass to provide a durable, corrosion-resistant shell that stands up to outdoor environments. The internal contacts are typically gold or silver-plated to ensure low contact resistance, and the high-grade PTFE (Teflon) dielectric ensures excellent insulation even at high temperatures. This is the ideal solution for joining two heavy-duty coaxial cables like RG-8 or LMR-400 together.

Key Technical Advantages

• High Power Capacity: Able to handle several kilowatts at HF frequencies, far exceeding the power limits of SMA or BNC connectors.

• Rugged Threaded Coupling: The 5/8-24 threads provide a massive amount of mechanical security, preventing accidental disconnects even when under the weight of thick cables.

• Universal Radio Standard: Compatible with virtually every amateur radio, CB radio, and marine VHF transceiver produced in the last century.

• Low Insertion Loss: High-quality plating and insulation minimize signal attenuation at frequencies below 300 MHz.

• Simplified Installation: Requires no special tools; the knurled center body allows for easy hand-tightening during field deployments or base station setup.

Key Features

• Adapter Type: Straight Barrel / In-Series Coupler.

• Interface: 2x UHF Female (SO-239).

• Impedance: 50 Ohm (Nominal).

• Body Material: Nickel-Plated Brass.

• Contact Material: Silver or Gold-Plated Phosphor Bronze.

• Insulator: PTFE (Teflon) for high-heat and voltage resistance.

• Common Applications: Ham Radio antenna extensions, CB radio cable joining, and bridge connections for SWR meters.

Technical Summary