MFJ-993B IntelliTuner Automatic Antenna Tuner.





MFJ-993B: MFJ 993B IntelliTuner™ Automatic Antenna Tuners facilitate tuning any antenna automatically; balanced, unbalanced, or single-wire.
MFJ 993B tuners are comprehensive automatic antenna tuning centers with an SWR/wattmeter, a built-in antenna switch for two antennas, and a 4:1 current balun for balanced lines.
They may be operated at a remote distance through a 9-pin to 9-pin computer cable using the MFJ-993RC remote control unit.

MFJ’s exclusive InstantRecall™, IntelliTune™, and AdaptiveSearch™ algorithms provide fast automatic tuning with more than 20,000 non-volatile Virtual Antenna™ memories.
Each of the two antenna ports have four banks of memory; each memory bank has over 2,500 non-volatile memories for tuner settings.

These tuners include a highly efficient switching L-network with wide matching capability, 1.8 to 30 MHz coverage, cross-needle power meters, a backlight LCD screen, a port for an accessory remote control, a radio interface port, and heavy-duty 16 amp/1,000 V relays.
They are rated at 300 watts to match 6 to 1,600 ohm antennas (SWR up to 32:1) or 150 watts to match wider range of 6 to 3,200 ohm (SWR up to 64:1) antennas. A maximum of 256 values of inductance and 256 values of capacitance is available.
With the capacitance switched between the input and output side, this provides a total of 131,072 L/C tuning combinations. The nominal tuning ranges are 0 to 24 microhenry’s and 0 to 3,900 picofarads.

All MFJ IntelliTuners™ learn and remember. When you transmit, they automatically adjust for minimum SWR and remember the frequency and tuner settings, then safely store them in non-volatile memory. The next time you operate on that frequency (or close to it), tuner settings are instantly restored and you’re ready to operate in milliseconds.

Automatically associates antennas with an impedance of 6 to 1600 ohms or 6 to 3200 ohms (depending on the power level)
Handle 300 watts (match 6 at 1600 ohms) or 150 watts (match 6 at 3,200 ohms)
Initially tune less than 15 seconds, usually less than 5 seconds
More than 20,000 non-volatile memories for tuner settings
Four memory banks per antenna with more than 2500 memories per bank
Very efficient switching network L switching circuit
Continuous frequency coverage from 1.8 to 30 MHz
Adjustable target SWR 1.0 to 2.0
Adjustable threshold SWR retune 0.5 to 1.5 change
SWR / illuminated cross needle wattmeter with high, low and auto range options
Multifunction backlit LCD display with contrast control
Digital readings for SWR, forward and reflected power
Bar counters for SWR, power forward and reflected power with beach options
Audio SWR meter with volume control
Integrated frequency counter
Two asymmetric coaxial antenna connectors SO-239
Connector for random wire or single-wire antennas
4:1 integrated current balun for balanced line antennas
Optional remote control
Optional radio interface for compatible radios
Requires 12V DC at less than 1-Amp for operation