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Old 02-16-2018, 07:44 PM
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Second broken 2m/70cm antenna...

OK, I've had enough of donating money to antennas which fall apart or break on rough trails. Where can I find an antenna which is flexible enough to take the vibration? Stainless steel appears to be a very poor choice material as it can't stand up to vibration.

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Old 02-17-2018, 08:47 AM   #2
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Larsen. These are commercial quality. I have run Diamond and Comet in the past. Diamond is pretty good, Comet less so as far as durability.

Find some rubber tubing with a small inner diameter that will just slide over the stainless whip. Just 2-3 inches long. Slide it down to where the whip goes into the base. If you can get it to slide over the larger diameter where the whips goes into, that is perfect. This will reinforce the base of the stainless whip and probably eliminate your breakage. This will work on all brands. I learned this running a 2 meter rig on heavy equipment......

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Old 02-18-2018, 11:26 AM   #3
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I have obtained good results from the open coil Larsen NMO 2/70B and the shorter spring loaded Larsen NMO 2/70SH.

The longer Comet and Diamond 2m antennas have a reputation for failures in offroading environments, particularly the center loaded closed coil and fold-over versions.
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Old 02-18-2018, 11:37 AM   #4
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I've had a Larsen NMO 2/70 with the closed coil on my JK for just over a year. Prior to that it spent almost 10 years on a car I owned. It waggles around like crazy on the trail or on the highway, but is still in one piece and working great.
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Old 02-19-2018, 01:06 PM   #5
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I also run a Larsen 2/70 with the base load. Only issue I had was the allen screws backing out, therefore losing the whip. That problem has since been fixed with blue locktite and the antenna has held up well.

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Old 02-19-2018, 07:18 PM   #6
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I run a Comet SBB-1 when I know I will be smacking a lot of brush and a CA-2x4SR the rest of the time. This is a 1/4 wave 2m (1/2 wave 70cm) rubber duck. For me, no need for higher gain on the trail.
2014 JKU Willys 6-spd, RK X-Factor 3.5", Fox Resis, KM3 37s, PR60s, Eaton e-lockers, 5.13, Atlas II 3.8, and another $10K in miscellaneous parts.
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Old 02-24-2018, 12:19 PM   #7
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As others have said, Larsen NMO2/70B. I've got one on my Jeep, mounted to the front left fender. It takes regular hits from trees, underbrush and overhanging rocks, but it simply bounces back time after time.

You can see one example here (at 0:21-0:25):

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