MFJ MFK-5124Y Instruction Manual download pdf (Page 7)

MFJ-5124K/Y Radio Interface Instruction Manual

Kenwood Radio Interface

The MFJ-5124K radio interface allows users of AT-300 compatible Kenwood

transceivers to connect to the MFJ-991, MFJ-993 and MFJ-994 IntelliTuner™

Automatic Antenna Tuners. With this interface, DC power is supplied by the

radio and control signals are connected between the radio and the tuner. The

operator can then control the tuner with a single push of the [AT TUNE] button

on the front panel of the radio. Supported Kenwood radios are TS-50S, TS-

450S, TS-480HX, TS-570S, TS-690S, TS-850S, TS-870S, TS-2000, and any

Kenwood radio that supports the Kenwood AT-300 tuner.

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.

Connections

1. Insert the 3.5 mm stereo phone plug into the tuner’s RADIO

INTERFACE jack.

2. Insert the 2.1 x 5.5 mm coaxial power plug into the tuner’s POWER

jack.

3. Insert the 8-pin modular plug into the MFJ-5124’s TO RADIO jack.

4. Important

: Make sure the DC power to the radio has been turned off.

The radio does not fuse the DC power to the tuner, and damage to the

radio can occur if the interface’s power connection comes in contact

with ground.

5. Connect the 6-pin molex connector to the mating 6-pin molex

connector, marked as AT or ACC, on the back of the Kenwood radio.

6. Push the [POWER] button on the tuner to the in position. When the

radio is turned on, the tuner will also power on.

7. Some Kenwood radios automatically check to see if an external

antenna tuner is connected during power on, such as the TS-570S (set

jumper JP2 to the A position). This is the factory default setting. If

both needles on the MFJ tuner keep bouncing (

TURN ON RADIO

appears on the MFJ-993) and do not go away, then move jumper JP2 to

the B position.

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MFJ MFK-5124Y Instruction Manual Page 7