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The clear mini8 is 52 ohm and for cophase you need 75 ohm coax. I worked at "Bobs CB" in Ventura California as a radio and antenna installer for almost four years and in that time I did a lot of cophase setups. On the vehicle you have a single antenna will give better all around performance without doubt. But if you want to do it anyway you can use cable tv 75 ohm coax which is double shielded and will take quite a bit of power. Run the coax from the antennas all the way to the pl259 connector that will screw onto the radio. Using a "tee" connector can cause SWR issues. Good luck on the install, let us know how it performs for you.


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