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Did I strip my NMO mount?

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davidh22

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Just wondering if I stripped my NMO mount based off of the images I attached below. There appears to be a silver dot kind of marking in the middle of the picture where the arrow is pointing to. Just wondering if I should be worried about that. I was installing a quarter wave uhf on my vehicle at the time and I am not sure if I stripped it because of that. Also when I was putting the antenna the car the brass from the mount left particles on the gasket. Just trying to make sure I did not screw up my NMO mount, those quarter waves are pesky to get on.

IMG_0625.jpgIMG_0628.jpg
 

davidh22

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the silver dot is what makes contact with the radiating element (rod) of the NMO antenna.
Not sure if I have it marked clearly in the photo or not but the mark I am referring to is the little dot on top of the bronze in the center of the mount. It almost looks like a scratch
 

exkalibur

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It looks to be fine. The contact is a bit worn, but clean it off good and you'll be fine. Just make sure there's a decent weather seal and it shouldn't be a problem.
 

WA0CBW

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If you are talking about the "dimples" on either side those are for a spanner tool to hold the base while you tighten the outer nut. Is it the camera angle that makes the white insulator not look round? Don't think I have seen one that isn't round.
bb
 

OhSixTJ

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Not sure if I have it marked clearly in the photo or not but the mark I am referring to is the little dot on top of the bronze in the center of the mount. It almost looks like a scratch

that’s exactly what he’s talking about.

also, antennas are never “pesky” to mount. All of mine have gone on and come off smooth as butter.
 

davidh22

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Be sure not to cross-thread the antenna to the mount. The antenna should screw onto the mount easily. If you have to force it, it is probably cross-threaded.

Is there a check to see if I cross threaded it?
 

mmckenna

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Just wondering if I stripped my NMO mount based off of the images I attached below. There appears to be a silver dot kind of marking in the middle of the picture where the arrow is pointing to. Just wondering if I should be worried about that. I was installing a quarter wave uhf on my vehicle at the time and I am not sure if I stripped it because of that. Also when I was putting the antenna the car the brass from the mount left particles on the gasket. Just trying to make sure I did not screw up my NMO mount, those quarter waves are pesky to get on.

Maybe a close up photo would help so we're 100% sure what you are talking about.

Looking at the photo, I see nothing at all wrong with your NMO mount.
If you are concerned about the scratches in the center button, that's not an issue. The tunable 1/4 wave antennas will sometimes have the whip poking down just a bit below the part with the set screw, and that will scuff/scratch the center button on the NMO mount. It won't be an issue.
 

ramal121

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The little scratch will not hurt anything. Actually it's normal as the whip will move and vibrate with the wind and do that. Now if the center button is burnt/dirty/gunked up, a little light cleaning is in order.

If you have a whip that is troublesome to screw on or has been cross threaded do this. Set the whip on the mount, press down firmly and turn it counter clockwise until you hear a click. This is the threads lining up and falling into place. Now clockwise to seat the whip.
 
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