The MFJ-915 RF Isolator is a 1:1 Current
Balun designed to be placed in line with a 50-Ohm coax. The RF Isolator is
effective from 1.8 to 30 MHz. It was designed to improve the performance of all
amateur stations, fixed or mobile.
MFJ-915 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. Use of the
MFJ-915 will increase the efficiency of all amateur stations.
It's made up of 50 Ferrite Core Beads, placed onto a 13-inch piece of RG-303
coax. The coax and SO-239 connectors have Teflon(R) for maximum insulation
and extended life of the product. The RF Isolator is enclosed in schedule 40 PVC
pipe for maximum strength and protection.