KMR400 N Cable 35FT N Male to N Male Ultra Low Loss - Long Run Signal

In this review the MOOKEERF KMR400 35ft N cable is evaluated for anyone needing a long, low-loss 50 ohm coax run. The bottom line: it is a workhorse cable for extending antennas and connecting amplifiers where minimizing signal attenuation matters. The cable's ultra low loss construction and an SWR under 1.15 make it a practical choice for installers and hobbyists who want reliable performance over a 35 ft run without complex matching or repeaters.

Key Features

• Ultra low loss construction: The aluminum foil and tinned copper braid shields keep signal attenuation very low so long runs retain usable signal levels.
• Low SWR performance: With SWR less than 1.15 the cable supports uninterrupted transfer and reduces reflections at higher frequencies.
• Measured loss at 1800 MHz: Around 2.05 dB loss at 1800 MHz gives a clear expectation for real-world mobile and LTE band runs.
• Durable outer jacket: The waterproof PVC jacket and clamped connector ends withstand abrasion and outdoor exposure for longer service life.
• Professional connector assembly: The 2.2 in heat shrink with adhesive and clamped design provides a secure, low-resistance connection that resists separation.
• Wide compatibility: This 50 ohm N male to N male assembly is suitable for antennas, boosters, amplifiers and many outdoor receivers.

Who It's For

The KMR400 35ft N cable is best for installers, amateur radio operators, and anyone extending outdoor antennas where a long, low-loss run is needed. It is particularly useful for 4G LTE boosters, GMRS repeaters, and other 50 ohm systems that require stable performance across higher frequencies.

Those who want a very lightweight or extremely flexible whip for tight indoor routing should look elsewhere, since the cable is noticeably robust and stiffer than thin coax. It is also not aimed at casual patch-cord use where short, highly flexible cables are preferred.

Pros & Cons

Pros

• Excellent build quality with aluminum foil and tinned copper braid shields for low signal loss.
• Low SWR under 1.15 supports clean signal transfer at higher frequencies.
• Weatherproof PVC jacket and clamped connector offer durability for outdoor installs.
• Good value for long runs compared with higher loss alternatives.

Cons

• The cable is relatively stiff, which can make tight routing or indoor bends more difficult.

Specifications

Length	35 ft
Impedance	50 ohm
Connector type	N male to N male
Measured loss (1800 MHz)	Approximately 2.05 dB
SWR	Less than 1.15
Shield	Aluminum foil + tinned copper braid
Outer jacket	Waterproof PVC

Our Verdict

The KMR400 35ft N male to N male cable is a solid, cost-effective choice for anyone needing a long 50 ohm coaxial run with minimal loss. Its combination of low measured attenuation, low SWR and rugged assembly makes it worthwhile for outdoor antenna extensions and booster installations, though its stiffness means it is best suited to runs that do not require tight bending.

Frequently Asked Questions

Can this cable be used outdoors?
Yes. The waterproof PVC jacket and clamped connector design are intended for outdoor use and resistant to abrasion and weather.

Is this cable compatible with my amplifier or antenna?
Yes. It is a 50 ohm N male to N male cable suitable for most 50 ohm amplifiers, boosters and antenna systems that use N connectors.

How much signal loss should I expect?
Expect about 2.05 dB loss at 1800 MHz for the 35 ft length, with generally low attenuation across typical cellular and WiFi bands.