The 1:1 Current Balun was designed to replace the center insulator of a dipole antenna. It is
made up of 50 Ferrite Core Beads placed onto a 13-inch piece of RG-303 Coax. Operates 1.8 to 30
MHz.

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.