Mfj Plug&play intellituner -939 User manual

MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner Instruction Manual

 2006-2015 MFJ Enterprises, Inc.

Contents

The Basics .....................................................................................................................................................................1

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

Models ..................................................................................................................................................................2

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

Speci ications ........................................................................................................................................................2

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

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

Automatic/Semi-Automatic Tuning Mode............................................................................................................5

Back Panel .....................................................................................................................................................................6

Installation .....................................................................................................................................................................7

General Tuner Setup and Cabling .........................................................................................................................8

Modi ication to Change Radio Model ..........................................................................................................8

Operation .......................................................................................................................................................................9

MFJ-939I Icom ..................................................................................................................................................9

Operation......................................................................................................................................................9

Icom Radio Inter ace............................................................................................................................9

Connections.................................................................................................................................9

MFJ-939K Kenwood........................................................................................................................................11

Operation....................................................................................................................................................11

Kenwood Radio Inter ace ..................................................................................................................11

Connections...............................................................................................................................11

MFJ-939Y Yaesu .............................................................................................................................................13

Operation or FT-100 .................................................................................................................................13

Operation or FT-450 .................................................................................................................................13

Operation or FT-857 or FT-897 ................................................................................................................13

Operation or FT-950 .................................................................................................................................14

Yaesu Radio Inter ace MFJ-5114Y ...................................................................................................14

Connections...............................................................................................................................14

Connections or the FT-100 ......................................................................................................15

Connections or FT-450 ............................................................................................................15

Connections or FT-857 or FT-897 ...........................................................................................15

Connections or FT-950 ............................................................................................................16

MFJ-939Y3 FT-1000MP FT-2000 FT-9000.....................................................................................................18

Operation or FT-1000MP series o radios.................................................................................................18

Operation or FT-2000 series o radios ......................................................................................................18

Operation or FTDX-9000 series o radios.................................................................................................18

Yaesu Radio Inter ace MFJ-5114Y3 .................................................................................................18

Connections...............................................................................................................................18

Connections or FT-1000MP series o radios............................................................................19

Connections or FT-2000 series o radios .................................................................................19

Connections or FTDX-9000 series o radios............................................................................20

MFJ-939Y4 FT-2000 ........................................................................................................................................21

Operation or FT-2000 series o radios ......................................................................................................21

Yaesu Radio Inter ace MFJ-5114Y4 .................................................................................................21

Connections or FT-2000 series o radios .................................................................................21

Modi ication For Use With Alinco .....................................................................................................................22

Alinco Radio Inter ace .......................................................................................................................22

Connections...............................................................................................................................22

Operation...................................................................................................................................22

Miscellaneous ..............................................................................................................................................................23

ANTENNA MEMORY ......................................................................................................................................23

INTELLITUNETM ALGORITHM ......................................................................................................................23

LC Limits ............................................................................................................................................................23

MORSE CODE AND BEEPS ............................................................................................................................24

TRANSCEIVER FOLDBACK...........................................................................................................................24

MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner Instruction Manual

 2006-2015 MFJ Enterprises, Inc. iii

GROUNDING HINTS........................................................................................................................................25

ANTENNA SYSTEM HINTS............................................................................................................................25

Location......................................................................................................................................................25

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

Appendices ..................................................................................................................................................................27

Resetting the Tuner .............................................................................................................................................27

Factory De aults .........................................................................................................................................27

Delete Entire Antenna Memory..................................................................................................................28

Delete Antenna Memory Bank ...................................................................................................................28

Total Reset..................................................................................................................................................28

Sel Test ..............................................................................................................................................................28

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

Relay Test ...........................................................................................................................................................30

Frequency Counter Calibration ...........................................................................................................................30

SWR Bridge Calibration .....................................................................................................................................31

Jumper Settings...................................................................................................................................................32

IN CASE OF DIFFICULTY...............................................................................................................................33

TECHNICAL ASSISTANCE.............................................................................................................................33

LIST OF ACCESSORIES ..................................................................................................................................33

FULL 12-MONTH WARRANTY ..............................................................................................................................35

Figures

Figure 1 General Setup ...............................................................................................................................................3

Figure 2 MFJ-939 Front Panel....................................................................................................................................4

Figure 3 Button Action ...............................................................................................................................................5

Figure 4 MFJ-939 Back Panel. ...................................................................................................................................6

Figure 6 General Setup ...............................................................................................................................................8

Figure 7 Icom Inter ace Cable. ...................................................................................................................................9

Figure 8 Kenwood Inter ace Cable...........................................................................................................................12

Figure 9 Yaesu Inter ace Cable (FT-100/-450/-857/-897/-950). ..............................................................................14

Figure 10 Yaesu Inter ace Cable (1000MP/2000/9000 series)...................................................................................19

Figure 11 Yaesu Inter ace Cable (FT-2000 series).....................................................................................................21

Figure 12 Alinco Inter ace Cable. ..............................................................................................................................22

Figure 13 Power-On Operations. ................................................................................................................................27

Figure 14 Block Diagram ...........................................................................................................................................34

Tables

Table 1 Icom...............................................................................................................................................................9

Table 2 Kenwood......................................................................................................................................................11

Table 3 Yaesu ...........................................................................................................................................................14

Table 4 Y3 Inter ace .................................................................................................................................................18

Table 5 Y4 Inter ace .................................................................................................................................................21

Table 6 Alinco ..........................................................................................................................................................22

Table 7 Memory Resolution .....................................................................................................................................23

Table 8 Tuner Beeps.................................................................................................................................................24

Table 9 Failure Messages. ........................................................................................................................................29

Table 10 Jumper JP1 Setting ......................................................................................................................................32

Table 11 Jumper JP2 Setting ......................................................................................................................................32

Table 12 Jumper JP4 Setting ......................................................................................................................................32

MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner Instruction Manual

 2006-2015 MFJ Enterprises, Inc.

Notes:

MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner Instruction Manual

 2006-2015 MFJ Enterprises, Inc. 1

THE BASICS

Introduction

The MFJ-939 Plug&Play IntellitunerTM a simple to install and convenient antenna tuner for use with Icom,

Alinco, Kenwood, or aesu radios. The MFJ-939 comes complete with interface cable and programmed

for your particular radio.

The MFJ-939 Plug&Play IntelliTunerTM lets you rapidly tune any unbalanced or single-wire antenna

automatically. MFJ's exclusive InstantRecallTM, IntelliTuneTM and AdaptiveSearc TM algorithms give you

fast automatic tuning with more than 20,000 non-volatile VirtualAntennaTM memories. The antenna has

eight banks of memory; with 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, a radio interface port, and heavy-duty 10 amp/1000 volt relays. It is rated at 200 watts

SSB/CW.

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-939 Plug&Play IntelliTunerTM learns and remembers. When you transmit, it automatically

adjusts for 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. The antenna has two sets of four banks of

memory, which can learn and remember more than 2500 frequencies and tuner settings. A total of 20000

settings.

When you key your transmitter, MFJ’s InstantRecallTM checks its memory to see if you have operated on

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

IntelliTuneTM 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 AdaptiveSearc TM

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 minimum power to tune is approximately two watts, with maximum SWR tuning accuracy occurring

at tuning power levels of 10-20 watts.

Like all MFJ’s IntelliTunersTM, the MFJ-939 supports radio tuner interfaces that are compatible with

Alinco EDX-2 tuner, Icom AH-3 and AH-4 tuners, Kenwood AT-300 tuner, aesu FC-30 tuner, and

aesu FH-1 and FH-2 remote controls.

When your station radio is upgraded or changed the MFJ-939 can be changed from one radio model to

another with the optional interface cables MFJ-5114A (for Alinco), MFJ-5114I (for Icom), MFJ-5114K

(for Kenwood); and MFJ-5114 / 3/ 4 (for aesu) that are available from MFJ Enterprises, Inc. So as

the station changes the tuner can change with the station.

The MFJ-939 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.

MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner Instruction Manual

 2006-2015 MFJ Enterprises, Inc.

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-939 aesu FT-100, FT-450, FT-847, FT-857, FT-897, FT-950, and compatibles

MFJ-939 3 aesu FT-1000MP and FTdx-9000

MFJ-939 4 aesu 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.

MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner Instruction Manual

 2006-2015 MFJ Enterprises, Inc. 3

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 connection may have high voltage while transmitting.

● Disconnect all antennas from the tuner during lightning storms.

● Always tune with low power (2-2 watts). Apply maximum power only after tuning up.

● Never exceed tuner specifications.

1. Connect the MFJ-939 to the interface cable and connect the interface cable to the radio.

2. Check the radio instructions to verify that the radio can supply 750mA on the 12V line coming to the

interface cable. If the radio can not supply 750mA then connect a 12-15VDC power source capable of

supplying 750mA to the tuner.

3. Connect your transmitter to the TRANSMITTER connector using a 50-ohm coaxial cable.

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

connect your random wire to the ANTENNA connector through the supplied adaptor.

5. Connect your ground connection to the GROUND post.

6. Press the [POWER] button to turn on the MFJ-939 tuner.

7. Press the [ALT] button momentarily until there is one beep. One beep indicates that memory 1 is

selected.

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

9. 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 ave a tuning solution on one band and you t en c ange bands and attempt to

transmit a tuning signal, t e previous tuning solution may be sufficiently severe suc t at

no power is detected by t e MFJ-939 (t e MFJ-939 will tell you to increase power).

W en t is occurs, simply bypass t e MFJ-939 and t en initiate a tune.

10. ou are ready to transmit with full power.

Note: During t e automatic tuning process, t e tuner will make some noise. T ese are t e

relays switc ing at a very ig rate and t is is normal. Do not be alarmed.

Note: W en t e tuner power is OFF, t e tuner is in bypass mode and RF from t e transmitter

goes directly to t e antenna wit no matc ing. T e tuner also powers up in t e bypass

mode. W en t e tuner power is ON, pressing [TUNE] quickly places t e tuner in bypass

mode if desired, w ic is indicated by one beep.

Figure 1 General Setup

MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner Instruction Manual

 2006-2015 MFJ Enterprises, Inc.

Front Panel

MODEL

MFJ-939

AUTOMATIC ANTENNA TUNER

200 Watts SSB / CW

MFJ Plug&Play IntelliTuner

POWERALT

TUNE

SWR

TUNE

Figure 2 MFJ-939 Front Panel.

SWR LED: A green LED that illuminates when the SWR is 1.5 or less.

TUNE LED: A red LED that illuminates when the automatic tuning is in progress.

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. One beep indicates bypass

mode, where RF from the transmitter goes directly to the antenna with no matching. A second

quick press toggles the tuner back to its last L/C setting, and the tuner responds with two beeps.

Press [TUNE] for 0.5 to 2 seconds to start the automatic tuning process. Tuning starts when

[TUNE] is released after the 0.5-2 second hold-time. 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. When the automatic tuning is completed, a

series of beeps indicates the tuned SWR where one beep indicates SWR of 1.5 or less, two beeps

indicate SWR of 1.6 to 2.0, three beeps indicate SWR of 2.1 to 2.5, and four beeps indicate SWR

of 2.6 to 3.0. For SWR above 3.0, “SWR” (di-di-dit di-dah-dah di-dah-dit) will be sent on CW.

Note: You can reverse t e two functions above by pressing and olding t e [TUNE] button for

approximately 10 seconds. I.e., w en t e [TUNE] button is pressed and eld for 10 seconds.

You will ear two beeps. Now pressing [TUNE] momentarily starts t e tuning process, and

pressing and olding t e [TUNE] button for 0.5-2 seconds puts t e tuner into t e bypass mode.

“StickyTune” allows for one-handed tuning operation. Normal tuning requires keying the

transmitter 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 is enabled, 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 mode on and off, press and hold the [TUNE] button for two seconds. One beep

indicates on and two beeps indicate off. Default is off.

Note: StickyTune resets to OFF w en t e power is cycled or after tuning.

MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner Instruction Manual

 2006-2015 MFJ Enterprises, Inc. 5

ALT Button: Has two different functions based on the length of time you press and hold it before

releasing. Press [ALT] quickly (less than one second) to select the primary memory bank to use.

Press button to toggle between Memory 1 and Memory 2. One beep indicates Memory 1 and two

beeps indicate Memory 2.

Press and hold [ALT] for one second to cycle among the four secondary memory banks of the current

primary memory selected. The selected bank is indicated by a series of short beeps, where one beep

indicates bank A, two beeps indicate bank B, three beeps indicate bank C, four beeps indicate bank D, and

five beeps indicate antenna memory is OFF. See “Antenna Memory” on page 11.

Pressing the [ALT] button will switch the antenna or bank only when there is no RF power; also, the tuner

setting for the selected antenna and bank, if available, is instantly restored from memory when enabled.

POWER Button: Used to turn the power on and off. When the power is off, the tuner is bypassed

(straight through from TRANSMITTER to ANTENNA). When power is turned on, 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.

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.

Note: W en t e tuner power is OFF, t e tuner is bypassed and RF from t e transmitter goes directly

to t e antenna wit no matc ing.

Automatic/Semi-Automatic Tuning Mode

Pressing [TUNE] and [ALT] simultaneously toggles between automatic and semi-automatic tuning mode.

One beep indicates automatic mode and two beeps indicate semi-automatic mode. In automatic mode, the

tuning routine is automatically started when at least two watts of power is applied and the SWR is greater

than 2.5. In semi-automatic mode, the tuning routine starts only when the [TUNE] button is pressed for

0.5 to 2 seconds.

Note: During t e automatic tuning process, t e tuner will make some noise. T ese are t e relays

switc ing at a very ig rate and t is is normal. Do not be alarmed.

BUTTON ACTION

Press + to toggle between automatic and semi-automatic mode.

ALT

TUNE

POWER

Press less than 0.5 second to toggle bypass mode; 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 Sticky une on and off.

Press less than one second to toggle between memory 1 and memory 2; press and hold for more

than one second to cycle through the 2 antenna memory banks.

Press in to turn power on, out to turn power off.

TUNE ALT

Figure 3 Button Action

MFJ-939 Plug&Play IntelliTuner Automatic Antenna Tuner Instruction Manual

 2006-2015 MFJ Enterprises, Inc.

BACK PANEL

RADIO

INTERFACE

POWER

12VDC

750mA

M FJ ENTERPR ISES, INC.

STAR KV ILLE, M S USA

GROUNDTRANSMITTER ANTENNA

Figure 4 MFJ-939 Back Panel.

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

sleeve. The tuner requires 12-15 volts DC at up to 750 mA. 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: W en t e tuner power is OFF, t e tuner is bypassed and RF from t e transmitter goes

directly to t e antenna wit no matc ing. W en turned on, t e tuner powers up in bypass

mode.

• Radio Interface: An 8-pin modular (RJ-45)

connector for connecting to the tuner interface

connector of compatible radios. Most radios

provide +13.8 VDC power thought its tuner

interface connector. If separate power supplies

are used to power the MFJ-939, the MFJ-939

should be powered on first (both LEDs blink

once) and then turn on the radio, so the radio

knows an external tuner is attached. The radio

will disable its internal tuner, if it has one, and

use the external tuner.

The Radio Interface works with radios that are compatible with Alinco EDX-2, Icom AH-3 and AH-

4, Kenwood AT-300, and aesu 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 aesu, press the

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

to CW mode, transmit a low power (typically 10-30 watts) carrier, and start the tuning process. Once

the automatic tuning is completed, the radio will return to its previous mode and power setting.

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

capa le of supplying the 750 mA of current required y the MFJ-939.

• Transmitter: SO-239 connector for coax cable from transmitter or transceiver

• Ground: Wing-nut terminal for RF ground wire connection.

• Antenna: SO-239 connector for coax cable from antenna.

Note: To use a WIRE on t e Antenna connector, be sure to use t e enclosed adaptor.

+13.8 V DC input ( 50 mA)

Ground

Key/TT/TX

TX I H

Start/TS/RX

12345678

Rear Panel View

Figure 5 Inter ace Connector

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