I just finished my install of my new mobile GMRS setup.
It's a BTECH GMRS-50V2 and using a Midland mxta26 antenna. I also picked up a Midland ghost antenna, but haven't tried it yet.
The antenna is installed on the highest part of the truck, which is the ladder rack. The rack is steel, and is above the cab, which is also steel.
I'm assuming that the antenna is too high above the cab to use the sheets metal as a ground plane, is that correct?
I have attached pictures. The truck obviously needs to be washed. That will happen once we're done cleaning up after Helene.