MFJ MFJ-993B Instructions

Model MFJ-993B

VERSION 2B

INSTRUCTION MANUAL

CAUTION: Read All Instructions Before Operating Equipment

MFJ ENTERPRISES, INC.

300 Industrial Park Road

Starkville, MS 39759 USA

Tel: 662-323-5869 Fax: 662-323-6551

DISCLAIMER

Information in this manual is designed for user purposes only and is not intended to supersede information contained in customer regulations, technical manuals/documents, positional handbooks, or other official publications. The copy of this manual provided to the customer will not be updated to reflect current data.

Customers using this manual should report errors or omissions, recommendations for improvements, or other comments to MFJ Enterprises, 300 Industrial Park Road, Starkville, MS 39759. Phone: (662) 323-5869; FAX: (662) 323-6551. Business hours: M-F 8-4:30 CST.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

Contents

THE BASICS

Introduction ...................................................................................................................................... 1

Features ............................................................................................................................................ 2

Specifications ................................................................................................................................... 2

Fast Start .......................................................................................................................................... 3

Front Panel ....................................................................................................................................... 4

SWR/Wattmeter .................................................................................................................. 4

LCD Display ....................................................................................................................... 5

LCD Contrast Control ......................................................................................................... 5

ANT Button ........................................................................................................................ 5

MODE Button ..................................................................................................................... 5

C-UP and C-DN Buttons .................................................................................................... 5

L-UP and L-DN Buttons ..................................................................................................... 5

AUTO Button ..................................................................................................................... 5

TUNE Button ...................................................................................................................... 6

StickyTune

VOL Control ....................................................................................................................... 6

POWER Button ................................................................................................................... 6

Back Panel ....................................................................................................................................... 8

Power .................................................................................................................................. 8

Remote Port ........................................................................................................................ 8

Radio Interface .................................................................................................................... 8

Transmitter ........................................................................................................................ 11

Ground .............................................................................................................................. 11

Balanced Line ................................................................................................................... 11

Wire .................................................................................................................................. 11

Antenna 1 .......................................................................................................................... 11

Antenna 2 .......................................................................................................................... 11

Installation ..................................................................................................................................... 11

SWR/Wattmeter ............................................................................................................................. 12

THE MENUS

Main Mode Menus ......................................................................................................................... 13

Digital Wattmeter Menu ................................................................................................... 13

Power Bar Meter Menu ..................................................................................................... 13

SWR Bar Meter Menu ...................................................................................................... 14

L-Network Menu .............................................................................................................. 14

Tuner Indicators ............................................................................................................................. 15

Antenna ............................................................................................................................. 15

IntelliTune ......................................................................................................................... 15

Memory ............................................................................................................................. 15

Power Level ...................................................................................................................... 15

LC Limit ........................................................................................................................... 16

.......................................................................................................... 6

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

Meter Range ...................................................................................................................... 16

Auto/Semi ......................................................................................................................... 16

StickyTune ........................................................................................................................ 16

Setup Mode Menus ........................................................................................................................ 17

Power Level Menu ............................................................................................................ 17

Target SWR Menu ............................................................................................................ 17

Auto Tune SWR Menu ..................................................................................................... 18

Meter Range Menu ........................................................................................................... 18

Peak Hold Menu ............................................................................................................... 18

Memory Menu .................................................................................................................. 18

IntelliTune Menu .............................................................................................................. 19

SWR Beep Menu .............................................................................................................. 20

Beep Menu ........................................................................................................................ 20

Refresh Menu .................................................................................................................... 20

Power-On Reset (POR) Sticky Tune Menu ...................................................................... 20

LC Limit Menu ................................................................................................................. 20

OPERATION

Manual Tuning ............................................................................................................................... 21

Meter Codes and Audible Beeps .................................................................................................... 21

Transceiver Foldback ..................................................................................................................... 23

Grounding Hints ............................................................................................................................ 23

Antenna System Hints.................................................................................................................... 24

Coaxial Cable Selection .................................................................................................... 24

Location ............................................................................................................................ 24

Matching Problems ........................................................................................................... 25

APPENDICES

Resetting the Tuner ........................................................................................................................ 26

Factory Defaults ................................................................................................................ 26

Delete Antenna Memory ................................................................................................... 27

Total Reset ........................................................................................................................ 27

Self Test ......................................................................................................................................... 27

Power Down Circuit Test ............................................................................................................... 29

Relay Test ...................................................................................................................................... 29

Firmware Version Number via Meter ............................................................................................ 29

Setting the Speaker Volume ........................................................................................................... 30

Wattmeter Calibration .................................................................................................................... 30

SWR Bridge Calibration ................................................................................................................ 30

Frequency Counter Calibration ...................................................................................................... 31

Alinco Radio Interface ................................................................................................................... 32

Connections ...................................................................................................................... 32

Operation .......................................................................................................................... 32

Icom Radio Interface ...................................................................................................................... 33

Connections ...................................................................................................................... 33

Operation .......................................................................................................................... 33

Kenwood Radio Interface .............................................................................................................. 34

Connections ...................................................................................................................... 34

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MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

Operation .......................................................................................................................... 34

Yaesu Radio Interface/MFJ-5124Y ............................................................................................... 35

Connections for FT-100 .................................................................................................... 35

Operation for FT-100 ........................................................................................................ 35

Connections for FT-450 .................................................................................................... 36

Operation for FT-450 ........................................................................................................ 36

Connections for FT-857 or FT-897 ................................................................................... 37

Operation for FT-857 or FT-897 ....................................................................................... 37

Connections for FT-950 .................................................................................................... 38

Operation for FT-950 ........................................................................................................ 38

Yaesu Radio Interface/MFJ-5124Y2 ............................................................................................. 39

Connections for FT-847 .................................................................................................... 39

Operation for FT-847 ........................................................................................................ 39

Yaesu Radio Interface/MFJ-5124Y3 ............................................................................................. 40

Connections for FT-1000MP series of radios ................................................................... 40

Operation for FT-1000MP series of radios ....................................................................... 40

Connections for FT

Operation for FT

DX-9000 series of radios..................................................................... 40

DX-9000 series of radios......................................................................... 41

Yaesu Radio Interface/MFJ-5124Y4 ............................................................................................. 41

Connections for FT-2000 series of radios ......................................................................... 41

Operation for FT-2000 series of radios ............................................................................. 42

Connections for FT

Operation for FT

DX-5000 series of radios..................................................................... 42

DX-5000 series of radios......................................................................... 42

In Case of Difficulty ...................................................................................................................... 43

Technical Assistance ...................................................................................................................... 43

List of Accessories ......................................................................................................................... 43

Circuit Block Diagram ................................................................................................................... 44

FIGURES

Figure 1. Typical Installation Block Diagram ................................................................................ 4

Figure 2. MFJ-993B Front Panel .................................................................................................... 4

Figure 3. Mode Button Flow Chart and Button Action .................................................................. 7

Figure 4. MFJ-993B Back Panel ..................................................................................................... 8

Figure 5. Alinco Interface Cable ..................................................................................................... 9

Figure 6. Icom Interface Cable ....................................................................................................... 9

Figure 7. Yaesu Interface Cable (FT-1000MP/-9000 series) ........................................................ 10

Figure 8. Yaesu Interface Cable (FT-2000/-5000 series) .............................................................. 10

Figure 9. SWR/Wattmeter ............................................................................................................ 12

Figure 10. Power Bar Meter (High Range) ................................................................................... 14

Figure 11. Power Bar Meter (Low Range) ................................................................................... 14

Figure 12. SWR Bar Meter ........................................................................................................... 14

Figure 13. Main Mode Menus Display ......................................................................................... 15

Figure 14. Tuner Indicators ........................................................................................................... 16

Figure 15. Power-On Operations .................................................................................................. 26

Figure 16. MFJ-993B Circuit Block Diagram .............................................................................. 44

 2005-2012 MFJ Enterprises, Inc.

iii

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

TABLES

Table 1. Memory Resolution ........................................................................................................ 19

Table 2. Meter Needle Stationary Codes ...................................................................................... 22

Table 3. Meter Needle Bounce Codes .......................................................................................... 23

Table 4. Failure Messages ............................................................................................................. 28

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

The Basics

Introduction

The MFJ-993B IntelliTuner

automatically. 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.

MFJ's exclusive InstantRecall tuning with more than 20,000 non-volatile VirtualAntenna

four banks of memory; each memory bank has over 2500 non-volatile memories for tuner settings.

The MFJ-993B IntelliTuner

capability, 1.8 to 30 MHz coverage, cross-needle power meters, backlight LCD display, an accessory remote control port, 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.

The MFJ-993B IntelliTuner

minimum SWR and remembers 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, the 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.

When you key your transmitter, MFJ’s InstantRecall

that frequency before. If so, tuning is instantaneous and you’re ready to operate. If not, MFJ’s

IntelliTune

algorithm (based on MFJ’s famous SWR Analyzer technology) kicks in. It measures the complex impedance of your antenna. Next, it calculates the components it needs and instantly snaps them in. Finally, it fine-tunes to minimize SWR, and you’re ready to operate – typically in a fraction of a second.

If the antenna impedance is not within the tuner’s measurement range, MFJ’s AdaptiveSearch

algorithm goes into action. Frequency is measured and relevant components values are determined. Only those values are searched for fast tuning. If it still cannot find a match, the search is performed again using a different search pattern.

The target tuned SWR can be set to 1.0 to 2.0. The minimum power to tune is approximately two watts, with maximum SWR tuning accuracy occurring at tuning power levels of 10-20 watts. Manual tuning is also available for “touching up” the tuning if desired.

Like all MFJ’s IntelliTuners

Alinco EDX-2 tuner, Icom AH-3 and AH-4 tuners, Kenwood AT-300 tuner, Yaesu FC-30 tuner, certain Yaesu radios with a CAT system, and Yaesu FH-1 and FH-2 remote controls. Optional interface cables MFJ-5124A (for Alinco), MFJ-5124I (for Icom), MFJ-5124K (for Kenwood), and MFJ-5124Y/Y2/Y3/Y4 (for Yaesu) are available from MFJ Enterprises, Inc. The optional MFJ-993RC Remote Control provides most tuner controls, allowing convenient remote locating of the tuner itself.

lets you rapidly tune unbalanced, balanced, or single-wire antenna

, IntelliTuneTM and AdaptiveSearch

includes a highly efficient switching L-network with wide matching

learns and remembers. When you transmit, it automatically adjusts for

, the MFJ-993B supports radio tuner interfaces that are compatible with

checks its memory to see if you have operated on

algorithms give you fast automatic

memories. Each of the two antennas has

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

The MFJ-993B tuner enters a “sleep” mode when idle and when no transmit signal is present, turning off the microprocessor clock to avoid the generation of spurious signals.

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)

• Tunes 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 (default is 1.5)

• Adjustable SWR threshold 0.5 to 1.5 (default is 0.5 above target SWR)

• 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 for remembering frequency-specific matching values

• 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 cables for compatible radios

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 (optimum SWR tuning accuracy occurs at 10-20 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

• 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 supply requirements : 12 - 15 volts DC

• Current consumption : 1 amp or less

• Dimensions (connectors not incl.) : 10.1 × 2.8 × 9.2 in; 257 × 71 × 234 mm (w × h × d)

• Weight : Approx. 3.9 lb; 1.77 kg

† Specifications and design are subject to change without notice.

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

Fast Start

WARNING

● Never operate the tuner with its cover removed. Contact with the components inside the tuner while transmitting will result in painful RF burns.

● Locate the tuner so that the rear terminals are not accessible during operation. The single wire and balanced line connection may have high voltage while transmitting.

● Disconnect all antennas from the tuner during lightning storms.

● Always tune with low power (2 watts minimum, 10-20 watts recommended), and with any

in-line amplifier bypassed. Apply maximum power only after tuning up.

● Never exceed tuner specifications.

1. Connect the MFJ-993B to a 12-15 VDC voltage source capable of supplying at least 1 amp.

2. Connect your transmitter or amplifier output to the TRANSMITTER connector using a 50-ohm

coaxial cable.

3. Connect your coax-fed antenna to the ANTENNA 1 connector using a 50-ohm coaxial cable, or

connect your random wire to the WIRE binding post, or connect your balanced line antenna to the BALANCED LINE binding posts and connect a jumper between the other two posts as indicated.

4. Connect your ground connection to the GROUND post.

5. Press the [POWER] button to turn on the MFJ-993B tuner. The Power-On Reset default is also for

StickyTune

Note: StickyTune

to be ON. Place the [ANT] button in the out position to select antenna 1.

after power cycle means that the MFJ-993B will do a full tune after a power cycle on the first frequency you transmit on only. No other frequency or memory solutions will be affected. So you can fully re-tune on any frequency by simply cycling power.

6. Lock the [AUTO] button in to select semi-automatic mode.

Note: The AUTO button should always be IN (semi-automatic) unless a compatible radio

interface cable is connected between the MFJ-993B and your transceiver. This ensures that the MFJ-993B does not attempt tuning during high-power operation, and is particularly important when an HF amplifier is in-line.

Note: If an amplifier is in-line, it should always be bypassed prior to tuning.

7. Key your transmitter to output a carrier of 2-20 watts CW, FM or AM.

Note: Due to detector non-linearities at low power levels, best SWR tuning accuracy occurs at

10-20 watts.

8. Press and hold the [TUNE] button for one second to start the automatic tuning process. When

completed, check to ensure an SWR of 1.5 or less has been achieved before increasing RF power.

Note: If you have a tuning solution on one band or antenna and you then change bands or

antenna and attempt to transmit a tuning signal, the previous tuning solution may be sufficiently severe such that no power is detected by the MFJ-993B (the MFJ-993B will tell you to increase power). When this occurs, simply bypass the MFJ-993B and then initiate a tune.

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

Note: If the tuner was unable to achieve the target SWR, the Reflected Power needle will

bounce three times when tuning completes.

9. You are ready to transmit with full power.

Note: During the automatic tuning process, the tuner will make some noise. These are the

relays switching at a very high rate and this is normal. Do not be alarmed.

Note: When the tuner power is OFF, the tuner is bypassed and RF from the transmitter or

amplifier goes directly to the antenna with no matching. The MFJ-993B always powers up in bypass mode to ensure maximum receiver sensitivity if you are listening on a different frequency than where tuning last occurred. When tuning starts, the MFJ-993B reverts to previously stored matching values or finds a new match if no previous information is in memory. You may bypass the tuner at anytime when the tuner power is ON by pressing [C-DN] and [L-DN] simultaneously or pressing [TUNE] quickly. When the MFJ-993B is bypassed, the reflected meter needle bounces to the 20-watt mark while the switches are pressed.

Antenna 1

ntenna 2

Transmitter MFJ-993B

50-ohm Coax

RF Ground 12 VD

Figure 1. Typical Installation Block Diagram.

Front Panel

3.0

400-3083

MODEL

MFJ-993B

• SWR/Wattmeter: The cross-needle meter measures forward power, reflected power, and SWR. It

operates whenever the MFJ-993B is powered on. The default full-scale readings are 300 watts forward and 60 watts reflected power. The meter can be set to a low power range of 30 watts forward and 6 watts reflected, or AUTO metering where the meter range is determined by the transmit power.

2.0

Hi x1

x.1

14.100MHz 1.1 FWD=100 REF=0.5

11.2 1.52 3SWR

0255075100PWR 300

MFJ IntelliTuner

SWR

MODE C-DN L-DN TUNE

LCD VOL

AUTOMATIC ANTENNA TUNER

C-UP L-UP AUTO POWER

ANT

BYPASS

Dual Power Level

300/150 Watts

Figure 2. MFJ-993B Front Panel.

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

The SWR is measured at the point where the two needles cross. See “SWR/Wattmeter” on page 12 for more detailed information.

• LCD Display: A 2-line by 16-character alphanumeric display. It displays the tuner’s various menus

and status. The display contrast can be adjusted by the [LCD] control on the front panel. Below the display are the SWR and power bar meter scales. Refer to Figures 13 and 14 for descriptions of the various displayed information.

• LCD Contrast Control: A trimpot control that adjusts the contrast of the LCD display. Use a small

flat blade screwdriver and turn clockwise to increase contrast.

• ANT Button: Used to select the antenna to tune. Button out selects Antenna 1; button in selects

Antenna 2. The Antenna indicator on the main display indicates the selected antenna. A balanced feedline or a single-wire antenna is, by default, Antenna 1. Changing the [ANT] button will switch

the antenna only when there is no RF power; also, the tuner setting for the selected antenna, if

available, is instantly restored from memory when enabled.

• MODE Button: Time-sensitive and used to navigate through the various main menus and to enter or

exit the setup menus.

• C-UP and C-DN Buttons: Used to manually increase or decrease the capacitance of the L-network

matching circuit. The capacitance range is 0 to 3908 pF (picofarads). The upper limit of capacitance, dependent on frequency, is used to limit the maximum voltage and current across the tuner’s components. This limit can be removed in the LC Limit setup menu, but is not recommended.

Note: Pressing [C-UP] and [C-DN] simultaneously toggles the capacitor between the input

and output sides of the L-network. Forward needle bounces to the 30 watts when the capacitor is on the transmitter side. Reflected needle bounces to the 5 watts when the capacitor is on the antenna side.

• L-UP and L-DN Buttons: Used to manually increase or decrease the inductance of the L-network

matching circuit. The inductance range is 0 to 24.86 μH (microhenries). The upper limit of inductance, dependent on frequency, is used to limit the maximum voltage and current across the tuner’s components. This limit can be removed in the LC Limit setup menu, but is not recommended.

Shortcut: Press both [L-UP] and [L-DN] buttons simultaneously to toggle SWR Beep on and

off. See “SWR Beep Menu” on page 20.

Note: Pressing [C-DN] and [L-DN] simultaneously places the tuner in bypass mode. The

reflected meter needle momentarily bounces to the 20-watt mark to indicate this. RF from the transmitter goes directly to the antenna with no matching.

• AUTO Button: Used to select automatic or semi-automatic tuning mode. Button out selects

automatic mode – the tuning routine is automatically started when 2-10 watts of power is applied and

the SWR is a preset amount above the preset target SWR. Button in selects the semi-automatic mode

– the tuning routine starts only when the [TUNE] button is pressed for 0.5-2 seconds. The Auto/Semi indicator on the main display indicates the selected mode.

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

Note: During the automatic tuning process, the tuner will make some noise. These are the

relays switching at a very high rate and this is normal. Do not be alarmed.

• TUNE Button: Has three different functions based on the length of time you press and hold it before

releasing. Press [TUNE] quickly (less than 0.5 second) to bypass the tuner. RF from the transmitter goes directly to the antenna with no matching.

Press and hold [TUNE] for 0.5-2 seconds to start the automatic tuning process. The transmitter must be keyed first with at least two watts of power. When the SWR is already below the target SWR, pressing [TUNE] will fine-tune the match for a lower SWR if possible.

StickyTune

with one hand and using the other hand to push the [TUNE] button to start the tuning process unless a

transceiver interface cable is installed. When StickyTune

allows for one-handed tuning operation. Normal tuning requires keying the transmitter

is enabled, a bar appears on top of the Auto/Semi indicator and the tuning process starts automatically when the transmitter is keyed with at least two watts of power regardless of the SWR. This works in both automatic and semi-automatic

modes. To toggle the StickyTune

seconds. The reflected power needle goes to 60-watt mark when on and to 5-watt mark when off; one

beep indicates on and two beeps indicate off. Power-On Reset (POR) StickyTune

mode on and off, press and hold the [TUNE] button for two

mode is selected

via the “POR Sticky Tune” setup menu; default is ON after a power cycle.

Note: StickyTune

is disabled after tuning.

Note: StickyTune

Note: If an amplifier is in-line, it should always be bypassed prior to tuning.

• VOL Control: A trimpot control that adjusts the volume level of the audio SWR meter. Use a small

flat blade screwdriver and turn clockwise to increase volume level.

• POWER Button: Used to turn the power on and off. Note that during power-on the analog meter

bounces three times (to indicate the model number, 993). When the power is off, the tuner is

bypassed (straight through from TRANSMITTER to ANTENNA1 and WIRE). When turning on the power, the tuner powers-up bypassed, but will revert to the last stored matching values or begin tuning on application of RF power when the TUNE button is pressed – or if Automatic or StickyTune is enabled. The target SWR appears on the main screen.

WARNING: Do not turn the power on and off rapidly, otherwise the tuning setting

memory can be corrupted and the unit will have to be reset to factory defaults.

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

MODE BUTTON FLOW CHART

SETUP MODESMAIN MODES

Digital Wattmeter

Power Bar Meter

SWR Bar Meter

L-Network

MODE

For 2 sec.

MODE

For 2 sec.

Idle for 8 sec.

MODE

14.100MHz 1.1 FWD=100 REF=0.5

14.100MHz 1.1 100

0.00uH 1,0 0pF 100

BUTTON ACTION

(while in the main modes)

Press in to turn power on, out to turn power off. Press in to select antenna 2, out to select antenna 1. Press to switch main modes and setup modes. Press to increase capacitance. Press to decrease capacitance. Press to increase inductance. Press to decrease inductance. Press in to select semi-automatic mode,

out to select automatic mode.

POWER

ANT

MODE

C-UP

C-DN

L-UP

L-DN

AUTO

OWER LEVEL

TARGET SWR

UTO TUNE SWR

METER RANGE

PEAK HOLD

MODE

MEMORY

INTELLITUNE

SWR BEEP

BEEP

REFRESH

OR STICKY TUNE

MODE

C-UP

L-UP

C LIMIT

Press or to turn on or incr ease setting.

Press or to turn off or decrease se tting.

C-UP L-UP

C-DN L-DN

Press less than 0.5 second to bypass the tuner; press and hold for 0.5 to 2 seconds to start the tuning process; press and hold for more than two seconds to toggle the StickyTune on and off.

Press + to switch the capacitor between the input and output side. Press + to toggle the SWR Beep on and off. Press + to increase both capacitance and inductance. Press + to bypass the antenna tuner.

Press + to toggle the Target SWR between 1.5 and 2.0. Press + to cycle the Auto Tune SWR among 0.5, 1.0 and 1.5 above the target SWR. Press + to cycle the Memory among banks A, B, C and D. Press + to cycle the Meter Range among 30 watts, 300 watts and auto range.

Press + to + toggle the power level between 300 and 150 watts. Press + to overwrite tuner memory with the current tuner setting.+

TUNE

C-UP C-DN

L-DNL-UP

C-UP L-UP

C-DN L-DN

TUNE C-UP

L-UPTUNE

TUNE C-DN

TUNE L-DN

TUNE C-UP L-UP

TUNE L-DNC-DN

Figure 3. Mode Button Flow Chart and Button Action.

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

Back Panel

ANTENNA 1 ANTENNA 2

Do not connect WIRE and

ANTENNA 1 at same time!

MFJ ENTER PRISES, INC.

ST ARKVILLE, MS US A

POWER

12VDC

REMOTE

PORT

TRANSMITTER

RADIO INTERFACE

BALANCED LINE

GROUND

Install Jumper When Using

BALANCED LINE Antenna

WIRE

Figure 4. MFJ-993B Back Panel.

• Power: This jack accepts a standard 2.1 × 5.5 mm coaxial plug with positive center and negative

sleeve. The tuner requires 11-15 volts DC at up to 1 amp. The use of a regulated supply is not mandatory but is recommended for best performance. An optional 12 volts DC 1.5 amp power supply, the MFJ-1316, is available from MFJ Enterprises, Inc.

WARNING: Do not apply voltages greater than 18 volts to this unit, or permanent damage

may result.

Note: When the tuner power is OFF, the tuner is bypassed and RF from the transmitter goes

directly to the antenna (ANTENNA 1) with no matching. When turned on, the tuner powers up in bypass mode.

• Remote Port: A female DB-9 connector for connecting to the MFJ-993RC Remote Control,

allowing remote operation of the tuner. The MFJ-993RC duplicates all the front panel buttons except [POWER] and [MODE]. In addition, there are two LEDs on the remote control. The red Tuning LED lights to indicate tuning is in progress and the green SWR LED lights when the SWR is below the target SWR.

Note: To use the MFJ-993RC remote control, both the [ANT] and [AUTO] buttons on the MFJ-

993B automatic tuner must be locked in; otherwise, Antenna 1 and Automatic mode are selected.

• Radio Interface: A 3.5 mm stereo phone jack for connecting to the tuner interface connector of

compatible radios. Most radios provide +13.8 VDC power through the tuner interface connector. If separate power supplies are used to power the MFJ-993B, the MFJ-993B should be powered on first (for certain radios,

TURN ON RADIO will display and both needles will bounce) so the radio knows

an external tuner is attached. The radio will disable its internal tuner if it has one, and use the MFJ993B external tuner.

The Radio Interface works with radios that are compatible with Alinco EDX-2, Icom AH-3 and AH4, Kenwood AT-300, and Yaesu FC-30, FH-1 and FH-2. When connected to a compatible radio, simply press the [TUNER] or [AT] button on the radio; for FH-1 or FH-2 compatible Yaesu, press the

[TUNE] button on the tuner to start the automatic tuning process. The radio will automatically switch

to CW mode, transmit a low power (typically 10 watts) carrier, and start the tuning process. Once the automatic tuning is completed, the radio will return to its previous mode and power setting.

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

WARNING: Make sure the +13.8 volts connection on the radio’s tuner port is capable of

supplying the 1 amp of current required by the MFJ-993B.

The MFJ-5124A interface cable provides power and control signals between an Alinco radio and the MFJ automatic tuner. Supported Alinco radios are DX-70, DX-77, DX-701, DX-801, and any Alinco radio that supports the Alinco EDX-2 tuner. Press the radio’s [TUNE] button to start the tuning process; for DX-70 press [FUNC] then [TUNE]. Refer to “Alinco Radio Interface” on page 32 for connections and operation.

Pin 1 (Ground) connects to t he Sleeves of both 3.5 mm Stereo Phone Plug and Power Plug.

Pin 2 (+13.8V) connects to the Center Pin of Power Plug.

Pin 3 (Key) connects to the Tip of 3.5 mm S te r eo Phone Plug.

Pin 4 is not connected. Pin 5 (Sta rt) connects to the Ri ng of 3.5 mm Stereo Phone Plug.

Figure 5. Alinco Interface Cable.

The MFJ-5124I interface cable provides power and control signals between an Icom radio and the MFJ automatic tuner. Supported Icom radios are IC-706, IC-707, IC-718, IC-728, IC-736, IC-738, IC-746, IC-756, IC-7000, and any Icom radio that supports the Icom AH-3 or AH-4 tuner. Push and hold the radio’s [TUNER] button for two seconds to start the tuning process. Push [TUNER] quickly to bypass the tuner. Refer to “Icom Radio Interface” on page 33 for connections and operation.

1 the Tip of 3.5 mm Stereo Ph one Plug.

Pin (Key) connects to

Pin (Start) connects to

Pin 3 (+13.8V) connects to

Pin (Ground) connects to

the Ring of 3.5 mm Stereo Phone Plug.

the Center Pin of Power Plug.

the Sleeves of both 3.5 mm Stereo Phone Plug and Power Plug.

Figure 6. Icom Interface Cable.

The MFJ-5124K interface provides power and control signals between a Kenwood radio and the MFJ automatic tuner. Supported Kenwood radios are TS-50S, TS-450S, TS-480HX, TS-570S, TS-590S, TS-690S, TS-850S, TS-870S, TS-2000, and any Kenwood radio that supports the Kenwood AT-300 tuner. Push and hold the radio’s [AT TUNE] button for one second to start the tuning process. Push the [AT TUNE] quickly to bypass the tuner or to cancel tuning in progress. Refer to “Kenwood Radio Interface” on page 34 for connections and operation.

Note: The TS-480HX will automatically reduce its TX power to 100 watts maximum (25 watts

AM) when the radio interface is used.

Note: For the TS-2000, use the ANT 1 and AT connectors on the radio to connect an external

antenna tuner. If the external tuner is connected to the ANT 2 connector on the radio, the external tuner will not function with the radio interface.

 2005-2012 MFJ Enterprises, Inc.

MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction Manual

The MFJ-5124Y interface provides power and control signals between a Yaesu radio and the MFJ automatic tuner. Supported Yaesu radios are FT-100, FT-450, FT-857, FT-897, FT-950, and any Yaesu radio that supports the Yaesu FC-30 tuner. Push and hold the radio’s (TUN) or (TUNE) key to start the tuning process. Refer to “Yaesu Radio Interface/MFJ-5124Y” on pages 35 to 38 for connections and operation.

The MFJ-5124Y2 interface provides control (but not power) between a Yaesu radio and the MFJ automatic tuner. Supported Yaesu radios are FT-847 and any Yaesu radio with a compatible CAT

system. Push the [TUNE] button on the tuner for 0.5 to 2 seconds to start the tuning process. Refer

to “Yaesu Radio Interface/MFJ-5124Y2” on page 39 for connections and operation.

The MFJ-5124Y3 interface provides control (but not power) between a Yaesu radio and the MFJ automatic tuner. Supported Yaesu radios are FT-1000MP, FT-1000MP MKV, FT-1000MP MKV Field, FT

DX-9000, and any Yaesu radio compatible with the Yaesu FH-1 or FH-2 Remote Control.

This cable plugs into the REMOTE jack on the rear panel of the Yaesu radios, and keys the Yaesu radios in the CW tune mode whenever the MFJ-993B’s [TUNE] button is pushed. MFJ recommends that the Yaesu CW tune setting be set to 10 watts (Yaesu MP menu selection 4-3) during the tune process when an amplifier is not used. For best accuracy when an amplifier is used, MFJ recommends that the Yaesu CW tune setting be set to 50 watts for 100-watt transceivers and 75 watts for 200-watt MKV transceivers during the tune process. If a FH-1 or FH-2 keypad is also used, both the FH-1/FH-2 and the radio control cable may be plugged in parallel using a 3.5-mm headphone splitter (mono or stereo is fine). Refer to “Yaesu Radio Interface/MFJ-5124Y3” on pages 40 to 41 for connections and operation.

KEY GND

22.1K1N4148

4.2V + 0.13V

Tip (KEY) connects to the Tip of 3.5 mm Stereo Phone Plu with a diode and a 22.1k ohm 1% resistor in series.

Sleeve (GND) connects to the Sleeve of 3. 5 m m Stereo Phone Pl ug.

Figure 7. Yaesu Interface Cable (FT-1000MP/-9000 series).

The MFJ-5124Y4 interface provides control (but not power) between a Yaesu radio and the MFJ automatic tuner. Supported Yaesu radios are FT-2000 series, FT

DX-5000 series, and any Yaesu radio

with compatible TX REQ jack. This cable plugs into the TX REQ RCA jack on the rear panel of these Yaesu radios, and keys the Yaesu radios in the CW tune mode whenever the MFJ-993B’s [TUNE] button is pushed. MFJ recommends that the Yaesu tune power setting be set to 20 watts (Yaesu menu 145 tGEn TUN PWR) during the tune process. Refer to “Yaesu Radio Interface/MFJ5124Y4” on pages 41-42 for connections and operation.

GND

KEY

Center pin (KEY) connects to the

Ground (GND) connects to the Sleeve

Tip of 3. 5 m m S tereo Phone Plug.

of 3.5 mm S t er eo Phone Plug.

Figure 8. Yaesu Interface Cable (FT-2000/-5000 series).

 2005-2012 MFJ Enterprises, Inc.

+ 36 hidden pages

MFJ MFJ-993B Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual