MFJ-916BM, DUPLEXER. 1.8-225/350-540 MHz, MAST MOUNT, SO-239 Wire Antenna it provides the necessary return

it provides the necessary return path for ground currents to reduce ground losses

See the DCU-2X for 220 VAC operation

It operates at 110V

it fine tunes to minimize SWR -- you’re ready to operate

MFJ-213 covers 1-60 MHz with digital precision

MFJ-916BM, DUPLEXER. 1.8-225/350-540 MHz, MAST MOUNT, SO-239 Wire Antenna it provides the necessary returnMast Mount Duplexer Like MFJ 916B but designed for outdoor use. Save coax, reduce losses. Tower leg or mast pole mount near your antennas. Heavy duty weather protected PVC housing, mounting bracket. U bolt fits up to 1 1 2 diameter mast or pipe. Measures 3 1 2W x 3 1 2H x 5D inches.