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I run LMR400 on all bands from HF-440 mhz with Zero Issues. I use the ultra flex even on vertical antennas because I want the flexibility it provides with the stranded center. You can't be too careful. Many forget that you don't want non Ultra Flex on any antenna system that is being rotated. LMR400 is Not the Best that you can buy but it's more than most will ever need. I run 100 to1200 watts thru several runs on HF & 6 meters so I'm not cutting it any slack & it does not let me down.