KMR400 Coax Cable

I have installed this to my HF radio antennas and am very happy with its construction, handling, and performance. The center conductor is copper-clad aluminum and so it is a bit lighter in mass than that with pure copper center conductors, and is still a substantial and low loss cable for use at HF frequencies. While the product photo shows a wooden spool, that is not included in the order. What one will get is a nicely wound length of coax for termination by the user. I used crimp-on fittings and am very pleased with this coax cable. No problems or issues at all - it is a drop-in replacement for LMR-400 and RG-8 coax. Recommended! Great value for its price.

The KMR400 coax has the same specifications as the Times Microwave standard LMR400 cable but at about 1/3 the price. This cable is constructed similarly to the LMR400 and is similarly a very stiff cable. The cable is not like the Times Microwave UltraFlex version which is much more flexible and has a slightly larger power loss. The connectors solder easily to the KMR cable, but the outer shield wire seems frizzier the LMR. I measured the coax cable loss with a MFJ 259 analyzer and verified the loss was the same as specified which is the same as the LMR. I use this cable for all feedlines outside my ham radio shack. Inside, I use the LMR400 UltraFlex cable. For portable antennas, shorter feedlines and lower frequencies I use the MOOKEERF coax found on Amazon. The MOOKEERF cable is smaller, has more loss and is cheaper.

Works fine, just what I expected in terms of quality and functionality. Used this exclusively for a new tower installation with four antennas.

This coax seems to have decent build quality. The shield/braid is a lot thinner than LMR400--I don't have the equipment to test/verify the loss compared to LMR400. Installed 100' on a 2m/70cm dual-band amateur radio antenna, and it seems to perform decently. We'll see how it holds up to the sun and weather, but i'm confident it will hold up ok.

Works great, easily beats the real stuff in price, outer jacket is a different plastic than the real LMR-400 but is still durable. Used outside with no issues for 2 years now.

Using this for a 2 meter ham radio application. Running from my roof to my basement and didn't want a poor SWR due to mediocre cable. Easy to work with and jacket and shielding are well made.

This coax is acceptable. But it does not perform as well as times microwave LMR 400 up in the 440 band UHF and higher. But it seems good for HF/VHF with minimal loss. It doesn’t meet ALL the specs that they give though and I have tried multiple pieces with my test equipment and have found it to not meet there specs, especially in the UHF band when I do a sweep test. But like I said, it is acceptable for HF and VHF, it is just as good as RG 213 or LMR 400 in that frequency range. Most ham radio guys do not buy their coax from Amazon, so it will work perfectly fine for the guys on CB radio that do shop on here. I was just checking out to see if there are any bargains available.

This cable performs on par with big name .400 class coax. I was able to test all aspects of the cable and was pleasantly surprised to find all specs to be as published. This is a great product and will buy again. I use this as feed line to all of my HF and VHF antennas. I hope to see long term performance from KMR-400.

As close to LMR400 as you're going to get, at less than half the price. I terminated the supplied 100' cable with crimped N types, and hooked it up to a calibrated 8714ES. Losses at some selected frequencies for the 100' supplied: 7.3MHz -0.35dB 14.3MHz -0.61dB 28.3MHz -0.95dB 51.3MHz -1.14dB 70.3MHz -1.26dB 145.3MHz -1.68dB 221.3MHz -2.01dB 435.3MHz -2.88dB 1296.2MHz -5.13dB 1420.2MHz -5.40dB 1575.1MHz -5.72dB 2400.1MHz -7.07dB

Excellent quality cable, no issues when installing connectors.

I purchased 100 foot role of KMR400 cable. I checked the insertion loss over the entire 100 foot role by inserting 100 watts at one end at 147 MHz and I measured 70 watts at the other end. Doing the math, that works out to be 1.54 dB over the length of the cable. That is the same performance as LMR400 cable but at half the price. I'd buy the KMR cable again for my next project.

It's an aluminum center core not copper.. Will not purchase again. Not LMR 400.. not really a good copy

Excellent quality. Low signal loss.