MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner Instruction Manual
2006-2015 MFJ Enterprises, Inc.
2
Models
MFJ-939I Icom IC-706, IC-707, IC-718, IC-725, IC-728, IC-736, IC-738, IC-746, IC-756, IC-7000
and compatibles
MFJ-939K Kenwood TS-50S, TS-450S, TS-480HX, TS-570S, TS590, TS-690S, TS-850S, TS-870S,
TS-2000, and compatibles
MFJ-939Y Yaesu FT-100, FT-450, FT-847, FT-857, FT-897, FT-950, and compatibles
MFJ-939Y3 Yaesu FT-1000MP and FTdx-9000
MFJ-939Y4 Yaesu FT-2000, and FT-5000
Features
• Automatically matches antennas from 6 to 1600 ohms impedance (SWR up to 32:1)
• Handles 200 watts SSB/CW
• Tunes in less than 15 seconds, usually less than 5 seconds
• Over 20,000 non-volatile memories for tuner settings
• Eight memory banks with over 2500 memories per bank
• Highly efficient switching L-network matching circuit
• 1.8 to 30 MHz continuous frequency coverage
• Audio SWR meter
• Built-in frequency counter for remembering frequency-specific matching values
• Built-in radio interface circuitry for compatible radios
• SO-239 coax fed antenna connector
• SO-239 coax to single wire adaptor
Specifications
• Impedance matching range : 6 to 1600 ohms
• SWR matching range : Up to 8:1 for < 50 ohms and up to 32:1 for > 50 ohms
• Minimum power for tuning : 2 watts
• Maximum power while tuning : 100 watts with fold back, 20 watts without fold back
• RF power limit : 200 watts SSB/CW
• Frequency range : 1.8 to 30 MHz continuous coverage
• Frequency counter accuracy : ±1 kHz across HF bands
• A/D conversion resolution : 8-bit
• Capacitance range : 0 to 3961 pF nominal (256 values)
• Inductance range : 0 to 24.86 µH nominal (256 values)
• Relay rating : 10 amp 1000 volts
• Relay electrical life : 100,000 operations
• Relay mechanical life : 10 million operations
• Memory endurance : 1 million erase/write cycles
• Memory data retention : > 200 years
• Power supply requirements : 12 - 15 volts DC
• Current consumption : 750 mA or less
• Dimensions : 6 1/2 × 2 1/8 × 8 1/4 in; 165 × 54 × 210 mm (w × h × d)
• Weight : Approx. 2.3 lb; 1.04 kg
† Specifications and design are subject to change without notice.
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