SKU: 47625616688

Motorola HKN9557A Mini-UHF to UHF Antenna Adapter Cable

$31.46 $34.96
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Description

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

Attribute Details
Brand Motorola
Model/SKU HKN9557A
Product Type Antenna Adapter Cable
Connectors Mini-UHF Male to UHF Female (SO-239)
Cable Length 8 Inches
Color Black

Compatibility
XPR5550 CDM1550 GM300 M1225
DM4400E DM4401E DM4600E DM4601E
DM3000 DGM4100 DGM6100 DGM5000E
DGM5500E DGM8000E DGM8500E XiR M8620i
XiR M8628i XiR M8668i MANTARAY EXPRESS MORPHEUS

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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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 47625616688

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4.2 ★★★★★
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Verified Purchase
Danielle Chen
Whiting, US
★★★★★ 5
Perfect Balance of Comfort, Support, and Style!
Size: 934-Z, Color: Black, Size: 934-Z, Color: Black
I’ve been using this chair for a few weeks now, and I’m genuinely impressed with how much of a difference it’s made in my workspace. The mesh back is one of my favorite features—it offers excellent breathability and prevents that sticky, overheated feeling you sometimes get with solid-back chairs, even after sitting for hours. The seat cushion is firm enough to give proper support but still has enough give to keep me comfortable through long workdays. It feels like the perfect middle ground between soft and supportive. The adjustable foot ring has been a complete game changer for me. I use a taller desk setup, and having somewhere to rest my feet makes a huge difference in posture and overall comfort. Whether I’m sitting upright for focused work or leaning back to read, it’s always at the right height. The flip-up armrests are another smart design choice. When I’m typing, I like to have them down for support, but when I’m done, I can flip them up and push the chair neatly under my desk—saving space and keeping things tidy. The casters roll smoothly on both hardwood and rugs, so I can move around easily without scraping the floor or getting stuck. The overall build quality feels solid and sturdy, with no wobbles or creaks. Assembly was surprisingly quick—everything was clearly labeled, the parts felt durable, and it only took me about 20 minutes from opening the box to sitting in the chair. The sleek, modern look is another big plus—it blends in perfectly with my home office décor without feeling bulky or taking up too much visual space. If you’re looking for a chair that combines comfort, ergonomic support, durability, and style, I can’t recommend this one enough. It’s equally great for work, studying, or just relaxing at your desk, and it’s definitely been worth every penny.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 12, 2025
S
Verified Purchase
sleepywan
Houston, US
★★★★★ 3
OK for the price, but overall comfort is avergae
Size: 934-Z, Color: Mustard
Easy to put together, color (mustard) accurate to images, and while I understand this is not a high-end chair, I feel like it still needs to be rated for its quality. Pros: the seat cushions are fairly comfortable and it rolls well. Adjustable footrest is easy enough and mostly sturdy. Cons: For a tall office chair, it doesn't go up high enough. I actually had to lower my standing desk to sit at it, which then isn't where I want it when I'm standing now. It's also a bit wobbly. The seat area's attachment to the post isn't as solid as it should be for a tall chair, so while sitting, it does tend to lean/slope forward and wobble side to side. The lumbar support is not adjustable, so I'm not even really sure what it does. And the armrests are not very comfortable to use. Since they are hard plastic, they are just a bit too rigid to rely on for any comfort. They are basically there to hold on to when you're getting out of the chair.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
M
Verified Purchase
Mel
Phoenix, US
★★★★★ 4
Good Value for a Tall Chair
Size: 934W-Z, Color: White
I have received this chair just today and would like to give my first impressions of it. Height is super adjustable as well as the foot rest. My desk is very tall (~34 inches vs standard ~29 inches) and does not suit a standard height chair. This chair's height is enough to sit comfortably at mybut also still having adjustment to be even higher. Lumbar support is a manual adjustment that can be adjusted by sliding the lumbar piece up or down and it seems it can be tiled as well. No reclining feature or slight backrest tilt adjustment. I'm used to my chairs reclining so it feels a little awkward siting in a flat base and straight backrest. I feel like I'm sitting too forward or leaning forward slightly but is probably something I can get use to. Easy to put together and feels very sturdy. Plastic parts of chair are made from a really sturdy plastic, like playhouse plastic materials. Wheels roll around carpet easily. Mesh seems to be a strong material, though the mesh feels kind itchy on bare skin. Overall, I think this is a good chair to get if you're needing a tall chair for a good value and can sacrifice no backrest tilt.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 3, 2025
T
Verified Purchase
Tram
Phoenix, US
★★★★★ 5
Excellent value for money!
Size: 934W-Z, Color: Black, Size: 934W-Z, Color: Black
I absolutely love this office chair! I needed a chair that could support my standing desk without sacrificing comfort, and this one completely exceeded my expectations. It's incredibly sturdy and durable, well-made, and the height adjustment is super convenient, making it easy to find the perfect fit. Even during long hours of work, the seat is comfortable, and the ergonomic design effectively reduces pressure on my back and legs. I love its clean, modern look—it fits my home office perfectly. Assembly was quick and easy, and for this price, the quality is absolutely fantastic!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2026
L
Verified Purchase
Lisa Bjornstad
Omaha, US
★★★★★ 5
Perfect chair!
Size: 934-Z, Color: Blue, Size: 934-Z, Color: Blue
I have an adjustable-height desk (also purchased from Amazon) and needed a drafting chair for those times when my body gets tired of standing. This chair fits the bill and then some! I put it together myself; it took me about an hour, but would take me about half that next time, since now I know what to do (and what NOT to do!). All the parts were there; there are even spare parts (see photo). All the holes were drilled in exactly the right places, too, which isn't always the case when I buy things from Amazon (my standing desk is a great example). The chair fits me; I'm short (5'3.5"), and often the seats of furniture are too deep for me to rest my feet flat on the floor. The depth of the seat on this chair is just a little over 18 inches, and with the adjustable footrest ring, it's perfect. I don't think a tall or heavy person would fit in it, to be honest. But it's perfect for those of us who are vertically challenged. I love that it glides easily on my hardwood floors and that it turns 360 degrees. The chair comes in numerous luscious colors, so take your pick! It is very sturdy, has good lumbar support, and the seat and seat back are very comfortable. And the arms flip up, which was an absolute must when I was shopping for this chair. I got it on sale, too -- $109.00 -- and I'm delighted with this purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026

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