MFJ MFJ-4713, Инструкция по эксплуатации, Страница: 4 / 8

MFJ-4713 Remote Antenna Switch Instruction & Technical Manual
1 THE MFJ-4713
1.1 DESCRIPTION
The MFJ-4713 Remote Antenna Switch
™
is MFJ’s answer for the rat’s nest of cables building up
around your multi-antenna deployment. Why run multiple cables back into your shack when you
can just run one instead? The MFJ-4713 allows you to connect up to four antennas and drive
them at full legal power. Best of all, you only need a single piece of coax. No extra control or
power cables are needed!
(a) Switch Box (b) Control Box
Figure 1: MFJ-4713 Components
The MFJ-4713 has two components: the Switch Box (Figure 1a) which goes as close to your
antennas as possible, and the Control Box (Figure 1b) which goes on your bench. The Switch Box
has a two-inch plate for mounting the unit. It can either be mounted at the base of a mast using
the provided U-bolt, or it can be mounted to a wall using screws. Wherever it is attached, be sure
to mount it with the SO-239 connectors facing the ground to prevent water buildup inside the
unit. The Control Box is designed to either sit upright on its rubber feet or to be mounted along
the edge of your bench. This will secure it from tipping over if you are using heavy coax and keeps
it out of the way.
The MFJ-4713 has an RF safety ground in the event of a chassis fault and the switch box contains
a 1 A bus fuse to protect against transient voltages coming in along the power supply. Remove the
four corner screws and the cover to access the fuse.
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