Motorola HKN9557A Mini-UHF to UHF Antenna Adapter Cable

Motorola HKN9557A Mini-UHF to UHF Antenna Adapter CableMini UHF to UHF Coaxial Adapter Cable for Mobile Transceivers Premium RF signal bridge engineered to facilitate stress free coaxial connectivity across professional mobile fleets. The Motorola HKN9557A is a genuine original equipment manufacturer coaxial RF accessory designed to bridge critical connection points in your communications hardware. Engineered as a highly durable 8 inch flexible bridge element, the Motorola HKN9557A Mini UHF to UHF Antenna

Mini-UHF to UHF Coaxial Adapter Cable for Mobile Transceivers

Premium RF signal bridge engineered to facilitate stress-free coaxial connectivity across professional mobile fleets.

The Motorola HKN9557A is a genuine original equipment manufacturer coaxial RF accessory designed to bridge critical connection points in your communications hardware. Engineered as a highly durable 8-inch flexible bridge element, the Motorola HKN9557A Mini-UHF to UHF Antenna Adapter Cable for Mobile Radios facilitates seamless conversion between differing interface terminals. This specialized pigtail adapter cable converts a standard male mini-UHF connector on the host radio chassis to a standard female UHF (SO-239) terminal receptacle, allowing rapid deployment with heavy-duty coax infrastructure. The Motorola HKN9557A is the updated version of the Motorola HKN9557.

This high-performance flexible connection element is purpose-built for mobile fleet installers, remote dispatch coordinators, and emergency vehicle technicians requiring clean RF line routing. By introducing an 8-inch flexible buffer line, the Motorola HKN9557A effectively dampens physical stress, vibration, and torque applied directly to the internal circuit board contacts of the radio deck. This structural cushion resolves a common workplace challenge where rigid, thick, low-loss transmission lines like LMR-400 coax can pull or warp structural connectors during high-speed transit.

Operators should note that this passive transmission element is designed specifically for standard mini-UHF ports and will not mate with alternative BNC, SMA, or N-Type interfaces. This short patch component includes no independent active electronics, internal power rails, or frequency-filtering software elements. The standalone mobile radio transceiver chassis, dashboard mounting brackets, heavy-duty external power wiring harnesses, and primary mobile roof-mount antennas are sold separately.

Key Features & Benefits

• Stress-Reducing Flexibility: Built with an 8-inch flexible lead that isolates heavy physical pull forces from delicate rear multi-pin radio chassis decks.
• Low-Loss RF Engineering: Features high-grade shielded materials to maintain stable impedance matching and minimize signal attenuation over line paths.
• Precision Mini-UHF Mating: Built with an explicit male mini-UHF terminal stud ensuring a perfect mechanical lockdown with compatible transceivers.
• Standard UHF Interface: Outfitted with a premium female UHF connector to accept standard PL-259 male terminal studs on transmission coax lines.
• Genuine Factory Tolerances: Manufactured strictly as an official Motorola HKN9557A Mini-UHF to UHF Antenna Adapter Cable for Mobile Radios assembly to preserve full factory electrical ratings.

Specifications

Compatibility

Recommended Accessories

• Motorola XPR5550 Mobile Two-Way Radio – High-performance digital mobile transceiver utilizing a rear mini-UHF antenna connector port.
• Motorola HKN4191C Mobile Power Cable – Heavy-duty direct-to-battery power cord assembly designed to supply consistent current to mobile radio housings.

Frequently Asked Questions

What is the exact physical length of this adapter assembly?

This patch cable element measures exactly 8 Inches from the outer edge of the male mini-UHF stud to the tip of the female UHF jack.

Can this cable adapter be utilized on an individual portable handset?

No, this accessory is specifically configured and physically size-mapped to align with the rear RF layout ports found on mobile vehicle radio decks.

Why is a flexible patch line recommended over a solid one-piece adapter plug?

The flexible 8-inch pigtail body absorbs mechanical chassis vibrations and line pull forces, preventing structural cracks or stripping on internal circuit boards.

Does this purchase include the external vehicle roof mount antenna?

No, this listing covers strictly the short adaptation patch cord. Primary low-loss transmission coax, magnetic bases, and whip elements are sold separately.

Is this an original manufacturer part or an aftermarket equivalent?

This is an authentic genuine original equipment manufacturer accessory built by Motorola to ensure low attenuation and optimal impedance matching.

What type of line termination is required on my main antenna cable?

Your primary low-loss antenna transmission line must be terminated with a standard male UHF (PL-259) connector to thread cleanly into this adapter.

Warranty

1-year manufacturer’s warranty.