My DIY Drive-On Antenna Mast For POTA Activations

Upper Part Of Antenna Mast Mount

Here is a detailed photo of the upper part of my mast mount that attaches to the Roof Rail:

The parts for this piece are (2) 2 1/2 inch PVC Reducing Tee’s for a 1 inch pipe. The 1″ pipe runs between the two Tee’s which are glued together at 90 degrees from each other. Notice the Tee on the right has a big slot cut into it. This is where the roof rail goes.

Concerning dimensions, I will give you mine. But yours will probably be different – unless you have a 2008 Jeep Grand Cherokee. What I did was measure the thickness and the width at the widest part of the roof rail. Usually the widest part of the roof rail is the bottom. My dimensions for my roof rail are as follows:

Thickness: 1 1/8 inch
Width: 1 5/8 inch

For the Tee with the big slot cut into it. The opening is 1 1/4 inch wide. What you want here is for this opening to be slightly larger than the height of your roof rail.

The length of the 1″ pipe between the two Tee’s is 14 inches.

Again, your mileage may (will) vary based on your vehicle.

Attaching The Upper Part

Attaching the upper part of the mast mount is quite simple. Just take the open ended Tee and hold the PVC assembly above the roof at approximately a 45 degree angle, and slide it in between the roof rail and the top of the vehicle.

Here is a photo of what I am talking about: