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939I AUTOMATIC ANTENNA TUNER REVIEWED BY HAROLD KRAMER, WJ1B ARRL CHIEF
OPERATING OFFICER WJ1B ARRL. ORG  THOSE OF US WHO LIVE IN URBAN AREAS
RARELY HAVE THE SPACE FOR HF YAGIS OR OTHER LARGE ANTENNAS.  MY 102 FOOT
LONG G5RV WIRE ANTENNA WORKS ON MOST, BUT NOT ALL, BANDS FROM 80 10 METERS
AS LONG AS I USE AN ANTENNA TUNER.  THE ANTENNA TUNER IN MY TRANSCEIVER
DOES NOT HAVE ENOUGH RANGE TO MATCH THIS ANTENNA ON SOME BANDS, SO AN
EXTERNAL ANTENNA TUNER IS REQUIRED.  SOME TUNERS HAVE WORKED WELL WITH MY
ANTENNA SYSTEM AND OTHERS HAVE NOT.  THAT IS WHY I WAS INTERESTED IN
TESTING THE NEW MFJ 939.  MFJ OFFERS SEVERAL DIFFERENT VERSIONS OF THE MFJ
939.  THE REVIEW UNIT IS THE MFJ 939I, WHICH IS SET UP TO INTERFACE WITH
ICOM TRANSCEIVERS AND INCLUDES A CABLE TO CONNECT THE TUNER TO ANY ICOM
TRANSCEIVER THAT SUPPORTS ICOMS AH3 OR AH4 ANTENNA TUNER.  THE MFJ 939K IS
COMPATIBLE WITH KENWOOD TRANSCEIVERS, AND THE MFJ 939Y IS COMPATIBLE WITH
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