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MFJ-939
HF Automatic Tuner

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MFJ-929

The MFJ-939 series Compact IntelliTuner™ automatically tunes your antenna as you tune your radio. SWR is just always low. It can tune your coax-fed or random wire antennas from 1.8 to 30 MHz from 2 to 200 Watts SSB/CW. It matches 6-1600 Ohms (SWR up to 32:1) and is made in the USA. Operating controls could not be easier. The MFJ-939 is learning your antenna system as you operate and storing this in its 20,000 memories. The more you operate, the more it learns. This tuner measures your antenna’s complex impedance (R, X), computes the L-network and engages needed components for instant matching. MFJ's exclusive VirtualAntenna memory system gives you 8 antenna memory banks of 2500 memories each. An audio SWR sensor beeps when your SWR is <1.5, 2, 2.5, 3. It alarms if SWR >3. Only 6 1/2W x 2 7/8H x 8 3/8D inches. 2.4 lbs. SO-239 input and output. The interface cable is included. This tuner requires 12 VDC at 750 mA. See MFJ-1316 below.

Order # Item Description Price Order
#6457 MFJ-939I For select Icom transceivers including:
IC-706, IC-707, IC-718, IC-725, IC-728, IC-736, IC-738, IC-746, IC-756, IC-7000 and compatibles.
$149.95 Order
#6317 MFJ-939K For select Kenwood transceivers including:
TS-50S, TS-450S, TS-480HX, TS-570S, TS590, TS-690S, TS-850S, TS-870S, TS-2000 and compatibles
$149.95 Order
#3642 MFJ-939Y For select Yaesu transceivers: FT-100, FT-450/D, FT-847, FT-857/D, FT-897/D, FT-950 and compatibles. $149.95 Order

Order # Item Description Price Order
#1469 MFJ-1316 12 VDC 1200mA AC Adapter $23.95 Order


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