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Technical - Bullet Mount

Last Changed 4/9/2016

On Tige we mounted a WiFi antenna on a fold down marine antenna mount One of the goals with the new motorhome was to reduce the amount of times climbing on the roof.  We wanted a fixed mount for our WiFi antenna.

We originally had a full length 15 dB WiFi antenna and mount it on a 4' fiberglass marine antenna extension for a lot of height for the antenna on Tige.  In the almost 10 years of use, there have only been a couple of times where that height was necessary.  In fact, most of the time when we used the WiFi connection, we left the antenna folded down.

On the Bounder, we are going to use a much shorter 4 dB WiFi antenna.

WiFiRanger Elite We already use a Ubiquiti Bullet HP WiFi radio.  We saw this WiFiRanger unit that uses a WiFi radio similar to a Bullet.

We decided to make a similar mount but use magnets to attach the mount to a steel plate glued to the roof.
Bracket We wanted a healthy large size bracket as the mount.  We purchased a jumbo canister water filter bracket from the RV Water Filter Store.

So far we have drilled the hole for the N-type Bulkhead adapter.  We also drilled two holes for the magnets near the bracket bend.  The other two magnets will use holes that came in the bracket.
click on images to enlarge
Assembled mount We cut down the vertical height of the bracket.

We drilled some holes for a wire tie to help hold the antenna position.

We used a Velcro strap held by the magnet mount screws to hold the Bullet in position.
Assembled mount Our bullet mount is ready to go. Now we need the motorhome.
click on images to enlarge
Hole in roof We drilled from inside with a long 1/4" drill bit so we knew where the entry point would be.

We then used a 3/4" hole say to cut through the roof.  We had to also cut from the inside to complete the hole.
Reducer and conduit We are running a piece of 1/2"electrical PVC conduit.

We use a 3/4"-to-1/2" reducer to add to the surface area for gluing the conduit and reducer to the electrical box.
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Electrical box glued We drilled through the bottom of the PVC electrical box for the 1/2" conduit gluing the conduit and the reducer.

3M 5200 adhesive caulk was spread under the bottom surface of the electrical box.

We use masking tape to make for cleaner caulk lines.  After the caulk is smoothed, the masking tape is removed.
Inside of hole The hole from the inside.  We had trial fitted the conduit to know what its length should be.
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Completed roof access The roof access will be used with the 4G Antenna and the Bullet mount.
Completed roof access We use wire ties (left) to hold cable on the roof.  The adhesive back of the wire tires (left center) is not good for exterior use,  We remove the regular adhesive (right center) using lacquer thinner.

Then we apply 3M Red Label super tape.
click on images to enlarge
Completed roof access Here are the 4G Antenna and the Bullet radio magnetically attached to a steel plate caulked to the roof.

The steel plate is painted to resist rust..
Completed roof access We used the prepped wire ties to route the 4G Antenna cable and the Cat-5 cable from the Bullet radio to the roof entrance..
click on images to enlarge

The ever more clear hindsight said we should have used 3/4" conduit instead of 1/2"

With the 1/2" conduit, we had to feed the RJ45/CAT-5 cable from the Bullet first followed by the SMA cable from the 4-G Antenna.

With a 3/4" conduit we could feed either cable first.

Disclaimer: The information in this site is a collection of data we derived from the vendors and from our personal experiences.  This information is meant as a learning guide for you to  make your own decisions  Best practices and code should always be followed.  The recommendations we make are from our personal experiences and we do not receive any compensation for those recommendations.
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