The coax and SO-239 connectors have Teflon (R) for maximum insulation and extended life of the product. The MFJ 1:1 Current Balun is enclosed in schedule 40 PVC pipe for maximum strength and protection. Unlike other baluns, the MFJ-918 makes a direct electrical connection to the antenna with #14 copper wire.
The MFJ Current Balun will reduce or eliminate stray RF often found on coax. This stray RF can cause burns and other problems with electronic equipment in ham-shacks and vehicles. Stray RF also results in a loss of radiated power from the antenna, which will lead to a great reduction in signal strength.