Rear Fender Install of NMO Mount

OBeerWANKenobi

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After having such good reception in my truck with the mag base mount and Larsen antenna, I have become spoiled and had to do something for my car. The hand held antenna just wasn't cutting it.

I wanted to do a 90 degree fender style mount instead of drilling a 3/4" hole in my car but I didn't want to bother ordering one that probably wouldn't work so I just bought the hardware instead. I enlisted my Uncle's help as he's a sheet metal guru and has all the equpment. It took about 10 minutes to make our own fender mount at the proper angle out of some stainless steel sheet metal.

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You can see the mount in the pic along with the other goodies. I ended up using the #8 screws.

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I used some Permatex on the back side of the mount around the screw holes and again under the heads of the screws to keep it water tight. I like that I only had to drill two small holes and the mount is very sturdy. If I ever decide to sell the car, I'll just remove the mount and put the screws back in.

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This is a pretty good spot on my car since the trunk kind of cams into place. It gives me good clearance for my antenna.

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I decided to go through this existing grommet on the opposite side to enter the trunk with the Coax.

I've done stuff like this before and I've found that the key is not to slit the grommet with an X or something like some people do, but to get a nice round hole through it that's a bit smaller than what you want to stick through it. That way it actually seals. So, I figured out a trick.

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I used a countersink bit on a piece of fuel line to wallow it out and create a sharp edge. Think of the reverse of the end of a spud gun....LOL. Anyway, you can push this and twist it into and throgh the rubber grommet to give you a nice round hole. The hole will always be smaller than your cutter, so plan accordingly.

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It was pretty tight on the coax but I decided to add a little Permatex here also to be safe since there is always water coming through here from the rear window slope..

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The inside routing was done following a cable behind the trunk molding to an area behind the rear seat and then down under the rear seat to the carpeting. Then under the carpet and up next to my center console. To do this job I used my handy fish tape.

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If you don't have one of these, get one before you do any wiring installs on your car. You'll thank me later!



All in all, I think it looks pretty nice and it works great. I'd still like to try out an Austin Spectra antenna but for me and my 150 - 170 frequency range around here, this is just fine for now.
 

dchemist

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Looks awesome plus a fantastic write up to boot! You're giving all sorts of ideas now.
 

Bocephus

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I still can't find a reason for me to add this sort of counter measure to my Explorer (5th Gen). I wouldn't know where to put the antenna (main obstacle), but yours is a very clean install and it looks good! Report back on how that antenna performs, and how tall is it? I couldn't put one on the top as I park in multiple garages (home/work) so that location it would be like a bumper car at a theme park.
 

OBeerWANKenobi

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I still can't find a reason for me to add this sort of counter measure to my Explorer (5th Gen). I wouldn't know where to put the antenna (main obstacle), but yours is a very clean install and it looks good! Report back on how that antenna performs, and how tall is it? I couldn't put one on the top as I park in multiple garages (home/work) so that location it would be like a bumper car at a theme park.
Whether it's useful as a countermeasure really depends on your driving style and any other hobbies that might draw unwanted attention like countermeasure testing. A scanner is also a hobby in and of itself. It's interesting to listen to and helps with awareness of what's going on around you. It's also a good study in psychology of people in general when you can listen to all the ass-hats that call the cops. Just this morning, somebody called the cops to come and help him because his 9 year old wasn't listening to him.
:ughh:
Worse, this isn't isolated...........it happens all the time.
:ughh: :ughh:

Back to the countermeasure usefulness, there are plenty of people that call the cops just because you had the nerve to even pass them. They like to embellish the story as well. Better off knowing ahead of time and being able to take appropriate measures.


Anyhoo. I wouldn't worry about mounting one on your roof. Those explorers aren't that tall. You can also get spring loaded antennas. The antennas aren't very fragile. You could always get a mag base for the time being and mount it near the rear where you can run the cable in past the weather stripping.

My antenna is 15"-16" tall. If I ever do get an Austin Spectra, it will be about twice that. The reception is very good. Signals that would otherwise be static and barely intelligible with the hand held antenna come in crystal clear with the external antenna.
 
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Got Jeep

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Looks good. What's your car wash strategy ? Hand wash or does it pop off easy ?
Also, any antenna whistle/noise at speed ?
 
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OBeerWANKenobi

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Looks good. What's your car wash strategy ? Hand wash or does it pop off easy ?
Also, any antenna whistle/noise at speed ?
I hand wash and wax a couple times a year but in between those I take it through touchless automatics. The antenna does unscrew easily but I think I'd just leave it on.

I haven't noticed any antenna whistle even at interstate speeds.
 

protias

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I still can't find a reason for me to add this sort of counter measure to my Explorer (5th Gen). I wouldn't know where to put the antenna (main obstacle), but yours is a very clean install and it looks good! Report back on how that antenna performs, and how tall is it? I couldn't put one on the top as I park in multiple garages (home/work) so that location it would be like a bumper car at a theme park.
Drill, baby, drill! ;)

Nice!! The reception must be incredible right now...

@protias will be proud for doing it right
Well, this method is more of a @lugnuts than me. I would have drilled and put it on the trunk lid. My first car, I had a trunk lip mount, which worked pretty well.
 

OBeerWANKenobi

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Drill, baby, drill! ;)


Well, this method is more of a @lugnuts than me. I would have drilled and put it on the trunk lid. My first car, I had a trunk lip mount, which worked pretty well.
If you've ever had to find parts for a discontinued car from Australia in the U.S., you'd use the Obeer and Lugnuts method too.
 

lugnuts

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Drill, baby, drill! ;)


Well, this method is more of a @lugnuts than me. I would have drilled and put it on the trunk lid. My first car, I had a trunk lip mount, which worked pretty well.
yup very similar to how I mounted my antenna's except I made a bracket that used the bolt from the hinge instead of having to drill screws into the sheet metal.
 

surprisinguy

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when you can listen to all the
Awesome install! You have so many assets with the sheet metal, 3d printer etc. Lucky guy.
Speaking of strange stuff, the other night there was an EMS call - the guy wanted them to turn on his AC, he couldnt do it himself and didnt want to wake his wife up cause she'd get mad ( he was 78yrs old). Too funny
 

OBeerWANKenobi

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