MFJ MFJ-4724RC User Manual

MFJ-4724RC 4–Position Antenna/Transceiver Switch Remote Control

INTRODUCTION

Thank you for purchasing the MFJ-4724RC 4-Position
Antenna/Transceiver Switch Remote Control. This

Remote Control allows the user to remotely operate the
MFJ-4724 Desktop/Remote Antenna/Transceiver Switch,
which is a versatile multiple Antenna/Transceiver Switch
designed to switch up to four 50-ohm antenna systems or
four transceivers in any combination. It handles high power,
up to 1500 Watts and sealed relays offer excellent life and
connection reliability. The unit is operational from 1-60 MHz
and useable to 150 MHz.

The MFJ-4724RC 4-Position Antenna/Transceiver Switch
Remote Control uses two simple rotary switches to select
one-of-four antennas or four transceivers in any combination.
Place the MFJ-4724 Desktop/Remote Antenna/Transceiver
Switch out-of-way under your desk or in another room and
use a remote control. In the OFF/Remote position, all inputs
are grounded or control is transferred to the MFJ-4724RC
Remote Control. All unused inputs are grounded. You can
connect a sense line to your transceiver so when it’s off all
inputs are automatically grounded.

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MFJ-4724RC 4–Position Antenna/Transceiver Switch Remote Control

INSTALLATION

1. See the MFJ-4724 Instruction manual for complete
instructions.

2. The unit can be located at any convenient location, as
long as it is not exposed to moisture. It should be
grounded to the station ground, and preferably
powered from a separate wall adaptor.

3. Connect your antennas to the SO-239 coax
connectors numbered 1-4. Note which antenna is
connected to each connector.

4. Connect your transceivers to the SO-239 coax
connectors labeled A-D. Note which transceiver is
connected to each connector.

5. Connect a feedline from the TRANSMITTER
COMMON connector to the ANTENNA COMMON
connector.

6. Connect the station ground to the GROUND
connector.

7. When using the MFJ-4724RC Remote Control,
connect a RJ-45 modular jack from the remote control
to the ANTENNA REMOTE jack on the back of the
unit and connect a RJ-45 modular jack from the
remote control to the TRANSMITTER REMOTE jack
on the back of the unit using a CAT-5 cable.

6. If your Transceiver is equipped with a Radio Sense
jack, you may connect it to the Remote Control using
a RCA plug so when your Transceiver is off, all inputs
are automatically grounded.

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