UHF M CLAMP for LMR400/RG8/RG11/RG213/RG393 Cable

Description

The UHF series (PL-259) is a venerable RF interface built for high power-handling in HF and VHF environments. This male (plug) variant is specialized for the 10mm (0.400″) cable class, accommodating high-performance cables such as the ultra-low-loss LMR400, industrial RG213, and the high-temperature/high-power RG393. Unlike crimp connectors, the clamp termination design utilizes a high-torque compression nut and internal gaskets to secure the cable’s outer conductor and jacket, creating a gas-tight, vibration-proof seal.

This connector is engineered for maximum durability, featuring a heavy-duty nickel-plated brass body and premium PTFE (Teflon) insulation. The internal clamp mechanism provides a superior 360-degree ground contact, critical for maintaining signal integrity and high power efficiency. The center conductor is typically terminated via soldering into the oversized center pin, ensuring a low-resistance path capable of handling the high wattage levels common in amateur radio, maritime transmitters, and professional broadcast systems.

Key Technical Advantages

• Large-Diameter Precision Calibration: Specifically engineered to fit 0.400-inch OD cables, ensuring a seamless mechanical transition and preventing impedance mismatches in high-power runs.

• Tool-Flexible Clamp Design: The robust nut and internal sleeve system allow for a professional-grade termination using standard wrenches, making it ideal for field repairs and tower-site installations.

• Superior Power & Voltage Stability: Built to manage high RF voltages without dielectric breakdown, making it suitable for transmitters and linear amplifiers exceeding 1kW.

• High-Strength Mechanical Grip: The clamp system provides exceptional pull-off resistance, ensuring the cable remains securely attached even under high wind loads or heavy vibration.

• Enhanced Environmental Protection: The integrated compression seal helps prevent moisture ingress into the cable dielectric, maintaining low attenuation in outdoor and marine deployments.

Key Features

• Interface Type: UHF Male (PL-259 Plug) with threaded coupling.

• Termination Method: Clamp (Outer Conductor) / Solder (Center Pin).

• Cable Compatibility: Optimized for LMR400, RG8, RG11, RG213, and RG393 coaxial cables.

• Premium Construction: Features a nickel-plated brass body and high-performance PTFE dielectric.

• Common Application: Base station antenna feeds, high-power RF amplifiers, and military-grade communication infrastructure.

Technical Summary