The MFJ-993B IntelliTuner™ lets you rapidly tune any antenna automatically: balanced, unbalanced, or single-wire.  The MFJ-993B is a comprehensive automatic antenna tuning center with SWR/wattmeter, antenna switch for two antennas, and a 4:1 current balun for balanced lines.  It 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 give you fast automatic tuning with more than 20,000 non-volatile VirtualAntenna™ memories.  Each of the two antennas has four banks of memory; each memory bank has over 2500 non-volatile memories for tuner settings.
 
The tuner includes a highly efficient switching L-network with wide matching capability, 1.8 to 30 MHz coverage, cross-needle power meters, backlight LCD display, a port for an accessory remote control, a radio interface port, and heavy-duty 16 amp/1000 volt relays.  It is rated at 300 watts to match 6 to 1600 ohms antennas (SWR up to 32:1) or 150 watts to match wider range of 6 to 3200 ohms (SWR up to 64:1).

A maximum of 256 values of inductance and 256 values of capacitance are 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 μH and 0 to 3900 pF.

All MFJ IntelliTuners™ learn and remember.  When you transmit, they automatically adjust for minimum SWR and remember the frequency and tuner settings, safely stored in non-volatile memory.  The next time you operate on that frequency (or close to it) and antenna, these tuner settings are instantly restored and you’re ready to operate in milliseconds.  Each of two antenna selections has four banks of memory, which can learn and remember more than 2500 frequencies and tuner settings per bank.

Features

• Automatically matches antennas with impedances of 6 to 1600 ohms or 6 to 3200 ohms
• Handles 300 watts (match 6 to 1600 ohms) or 150 watts (match 6 to 3200 ohms)
• Tune in less than 15 seconds, usually less than 5 seconds
• Over 20,000 non-volatile memories for tuner settings
• Four memory banks per antenna with over 2500 memories per bank
• Highly efficient switching L-network matching circuit
• 1.8 to 30 MHz continuous frequency coverage
• Adjustable target SWR 1.0 to 2.0
• Adjustable SWR threshold 0.5 to 1.5
• Lighted cross-needle SWR/wattmeter with high, low, and auto range options
• Multifunction backlit LCD display with contrast control
• Numeric readings for SWR, forward and reflected power
• Bar meters for SWR, forward and reflected power with range options
• Audio SWR meter with volume control
• Built-in frequency counter
• Two SO-239 coax fed antenna connectors
• Connector for random wire or single wire antennas
• Built-in 4:1 current balun for balanced line antennas
• Optional remote control
• Optional radio interface for compatible radios

Requires 12 VDC at less than 1A for operation, or order optional DXE-PSW-12D1A power supply.

MFJ-993B Antenna Tuner Instructions (506K pdf)

Specifications

• Impedance matching range: 6 to 1600 ohms (300 watts) or 6 to 3200 ohms (150 watts)
• SWR matching range: up to 8:1 for < 50 ohms and up to 32:1 for > 50 ohms (300 watts) -- up to 8:1 for < 50 ohms and up to 64:1 for > 50 ohms (150 watts)
• Minimum power for tuning: 2 watts
• Maximum power while tuning: 100 watts with foldback, 20 watts without foldback
• RF power limit: 300 watts SSB/CW
• Frequency range: 1.8 to 30 MHz continuous coverage
• Frequency counter accuracy: ±1 kHz across HF bands
• Frequency counter range: up to 50 MHz
• Capacitance range: 0 to 3908 pF nominal (256 values)
• Inductance range: 0 to 24.86 μH nominal (256 values)
• Relay rating: 16 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 requirements: 12 - 15 volts DC, 2.1 × 5.5 mm coaxial plug, center pin positive
• Current consumption: 1 amp or less
• Dimensions (approx.): 10.1 × 2.8 × 9.2 in. (257 × 71 × 234 mm) (width/height/depth) not including connectors
• Weight (approx.): 3.9 lb (1.77 kg)

† Specifications and design are subject to change without notice.

LIMITED 12 MONTH WARRANTY

MFJ Enterprises, Inc. warrants to the original owner of this product, if manufactured by MFJ Enterprises, Inc. and purchased from an authorized dealer or directly from MFJ Enterprises, Inc. to be free from defects in material and workmanship for a period of 12 months from date of purchase provided the following terms of this warranty are satisfied.

1. The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check, credit card or money order receipt, etc.) describing the product to establish the validity of the warranty claim and submit the original or machine reproduction of such proof of purchase to MFJ Enterprises, Inc. at the time of warranty service. MFJ Enterprises, Inc. shall have the discretion to deny warranty without dated proof-of-purchase. Any evidence of alteration, erasure, or forgery shall be cause to void any and all warranty terms immediately.

2. MFJ Enterprises, Inc. agrees to repair or replace at MFJ's option without charge to the original owner any defective product under warrantee provided the product is returned postage prepaid to MFJ Enterprises, Inc. with a personal check, cashiers check, or money order for $7.00 covering postage and handling.

3. This warranty is NOT void for owners who attempt to repair defective units. Technical consultation is available by calling the Service Department at 662-323-0549 or the MFJ Factory at 662- 323-5869.

4. This warranty does not apply to kits sold by or manufactured by MFJ Enterprises.

5. Wired and tested PC board products are covered by this warranty provided only the wired and tested PC board product is returned. Wired and tested PC boards installed in the owner's cabinet or connected to switches, jacks, or cables, etc. sent to MFJ Enterprises, Inc. will be returned at the owner's expense unrepaired.

6. Under no circumstances is MFJ Enterprises, Inc. liable for consequential damages to person or property by the use of any MFJ products.

7. Out-of-Warranty Service: MFJ Enterprises, Inc. will repair any out-of-warranty product provided the unit is shipped prepaid. All repaired units will be shipped COD to the owner. Repair charges will be added to the COD fee unless other arrangements are made.

8. This warranty is given in lieu of any other warranty expressed or implied.

9. MFJ Enterprises, Inc. reserves the right to make changes or improvements in design or manufacture without incurring any obligation to install such changes upon any of the products previously manufactured.

10. All MFJ products to be serviced in-warranty or out-of-warranty should be addressed
MFJ Enterprises, Inc.
300 Industrial Park Road
Starkville, Mississippi 39759
USA
 
and must be accompanied by a letter describing the problem in detail along with a copy of your dated proof-of-purchase.

11. This warranty gives you specific rights, and you may also have other rights which vary from state to state.

Part #	Part Name	Ship By	Price	Add to Cart
DXE-PSW-12D1A	AC Adapter 12VDC/1000mA	Ship Tuesday	$ 19.99
MFJ-993RC	Remote Control for MFJ-991/MFJ-993/MFJ-994	Ship Tuesday	$ 37.95
MFJ-1316	MFJ 12 VDC 1.5A AC Adapter w/ 2.1mm Plug	Ship Tuesday	$ 22.00
DXE-CBC-8XU3	Coax Cable Belden 9258 RG8X PL259/PL259 3 ft	Ship Tuesday	$ 19.99
DXE-CBC-8XU6	Coax Cable Belden 9258 RG8X PL259/PL259 6 ft	Ship Tuesday	$ 21.99
MFJ-5124I	AutoTuner Radio Interface Cable for ICOM	Ship Tuesday	$ 18.95
MFJ-5124K	AutoTuner Radio Interface Cable for Kenwood & Compatibles	Ship Tuesday	$ 57.95
MFJ-5124Y	AutoTuner Radio Interface Cable for Yaesu & Compatibles	Ship Tuesday	$ 57.95