MFJ-993B IntelliTuner Automatic Antenna Tuner
Instruction Manual
2005-2012 MFJ Enterprises, Inc.
11
•
Transmitter:
SO-239 connector for coax cable from transceiver or amplifier.
•
Ground:
Wing-nut terminal for RF ground wire connection.
•
Balanced Line:
Two binding posts for connecting balanced line antennas. To use balanced line
antenna, install a jumper as shown to the WIRE binding post.
•
Wire:
Binding post for connecting single wire antennas. The WIRE binding post is internally
connected to the ANTENNA 1 connector.
Note:
When using the WIRE binding post, there should be no coax cable connected to the
ANTENNA 1 connector.
•
Antenna 1:
SO-239 connector for coax cable from antenna. The ANTENNA 1 connector is
internally connected to the WIRE binding post.
Note:
When using the ANTENNA 1 connector, there should be no jumper and no wire attached
to the WIRE binding post.
•
Antenna 2:
SO-239 connector for coax cable from antenna.
Installation
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 (2-20 watts) , and any in-line amplifier must be bypassed.
Apply maximum power only after tuning up.
●
Never
exceed tuner specifications.
1.
Place the tuner in a convenient location at the operating position. When using a random wire or
balanced line, the feed through insulators may have high RF voltages. These voltages can cause
serious RF burns if the terminals are touched when transmitting.
Be sure to locate the tuner so
these terminals cannot accidentally be contacted during operation.
2.
Connect the tuner to the transceiver or amplifier with 50-ohm coaxial cable (such as RG-8/U). See
Figure 1 on page 4.
3.
Connect the antenna(s) to the tuner as follows:
•
Coaxial feedlines (RG-8/U or better) to the SO-239 connectors labeled ANTENNA 1 and/or
ANTENNA 2.
