CB enthusiast Don Johnson invented the DK3 screwdriver antenna in 1991. He designed a CB antenna using a modified electric screwdriver motor installed inside the lower section to create a multiband antenna. The tubing on the lower part of the antenna fully encases the screwdriver and also increases the antenna’s radiation efficiency, which makes it work better. The DK3 screwdriver antenna maintains its superiority and most CB experts recommend buying the original DK3 antenna design for an already-assembled mast section of the antenna. Writer Bio
