Lance, KA2EJD wwrites:
Too often, I find new operators in an event, trying to use an HT with a rubber duck antenna to get into a net and not making it because the antenna just doesn’t cut it. Often they have a mag-mount, but can’t operate from their car. Unfortunately, they don’t realize that there is a way to use that mag mount antenna more efficiently.
The answer is the ‘Bazooka Ground Plane.’ A friend of mine give it this name, and it kinda stuck. As you can see from the drawings and photo it’s an easy build, with all of the materials available from the local big-box home improvement stores. The only tools needed are screwdriver, 7/16 wrench and sockets, and a drill with a 1/4″ bit.
Lance also included some written instructions.
I often advise newcomers to build a 450-Ω ladder line J-pole antenna to use with their HTs in this situation, but this is a good way to make use of an antenna that you already have. Here’s a photo of the Bazooka Ground Plane in action.