MFJ MatchMaker 212 Quick Start Manual

MFJ-212 MatchMaker™

Introduction

This new MFJ-212 MatchMaker™ lets you tune up your antenna tuner without
transmitting a single milliwatt! You can't cause QRM - there's no radiated power.
You can precisely tune your antenna tuner for a 1:1 SWR - no additional
"tweaking" needed.
Protect your tranceiver and antenna tuner. Avoid dangerous overheating and
arcing caused by high SWR and long tune-ups. It's easy to use. Plugs between
your tranceiver and antenna tuner.
Adjust your tuner for a null in receiver noise by ear or by S-meter and you have
1:1 SWR!
Tuning noise is modulated to make it easy to recognize.
And if you accidentally transmit, you won't burn up your MFJ-212
MatchMaker™. MFJ's exclusive RF*Guard™ automatically bypasses your MFJ-
212 to prevent damage. Works with all tranceivers from 160 through 6 meters.

Installation and Operation

The MFJ-212 Match Maker connects between your transceiver and antenna
TM
tuner. A 12 Vdc, 300 mA power supply such as the MFJ-1312B should be used
to provide a proper power source for the MFJ-212 Match Maker.
standard 2.1 mm coaxial plug with the center being positive and the sleeve being
ground. Ensure that the POWER switch on the front panel is in the OFF position
(out), then connect the power supply to the POWER jack on the rear panel.
Note: The MFJ-212 may also be powered by a 9V alkaline battery. to access
the battery connector, ensure the POWER switch on the front panel is in
the OFF position (out), remove the screw on each side of the MFJ-212 and
remove the cover. Be sure to replace the cover before operating the
unit!
Connect the Antenna out jack on your transceiver to the TRANS jack and
antenna tuner to the ANT jack of the MFJ-212. Apply power to your transceiver
and tune to the desired frequency. Next, apply power to the MFJ-212 by
pressing the POWER switch in. The PWR LED on the front panel of the MFJ-212
should begin flashing and you should hear a pulsing "white noise" from your
receiver. Adjust your tuner for a null in receiver noise by ear or by S-meter and
you have 1:1 SWR! Your antenna is now matched to your transceiver!
Remember to turn the power to the MFJ-212 OFF before using your transceiver.

MFJ-212 Front Panel

Use a
TM .