MFJ Enterprises Original MFJ-916B 1.8-225, 350-540 MHz Duplexer - SO-239

Nothing rattled inside when I shook it and it works.

Makes the use of separate antennas in my shack easy. I havent found a noticeable change in swr with this in line.

Well built and compact size. Works as it should

This is a very useful duplexer. It works differently from a diplexer, so be sure you are getting the kind you want.

The convenience of ordering on-line and fairly quick delivery made it easy to obtain this well known product. I use it to connect a VHF/UHF Arrow antenna to my radio while operating in a portable location for amateur radio satellite communication.

I think this is one product MFJ can rightly take pride in. It allows you to operate two radios (a 2 meter and 70 cm radio) on one shared antenna...or feed two antennas to one dual band radio. What is does not allow is repeater operation that requires both bands on a single radio. For example, if you set up your radio to call the repeater on the ISS which has an uplink frequency on the 2 meter band and a downlink frequency on the 70 CM band you can have one or the other, but not both, to the same radio. The workaround is to transmit on the 2 meter and receive on on the 70 CM with another radio.

Plug and play with great specs

A very heavy solid built component in a metal box.

As expected!

Works just as advertised.