Firestik DM-4A Dome Mount SO-239 Connection
As you would expect, Firestik takes the popular Dome Mount to the next level! We make the worlds best! Instead of using a multi-piece mold insert we designed our mounts with a one piece insert. The chances of developing internal resistance is totally eliminated as is the possibility of having water leak through the center to corode connections or ruin the inside of your vehicle. We also molded this piece using glass reinforced nylon for durability, strength and longevity. Both models are made to fit a standard 1/2" (13mm) hole so you can use them on all common mounts (mirror mounts, flat mounts, stake hole mounts, etc.) or by itself as a stand alone mount. Each model includes a rubber seal as well as an underside support washer. These mounts have a 2" (51mm) diameter base, and when installed with the rubber seal in place, stand a little over 2" (52mm) tall. The major difference in the two models is the method of connecting the coax cable.
The DM-4A requires that the coax cable be terminated with a PL-259 connector on the mount end as well as on the radio end. While this adds convenience to the installation, it also requires more space on the underside, about 0.95" (24mm) not including the space added by the connector.