MFJ-9982 2500 Watt Antenna Tuner
Instruction Manual
3
Antenna Selector
The
ANTENNA SELECTOR
allows you to select 2 rear panel SO-239 coaxial connectors either direct
or through the tuner, a 50 ohm dummy load, and single wire or balanced feedline antennas
. The 50 ohm
DUMMY LOAD
can be used for 10 minutes at a power level of 100 watts and a maximum of 10
seconds at 1.5kw. If these times are exceeded damage may occur to the tuner.
Installation
WARNING:
Locate the tuner so the rear is not accessible during operation. High Voltages will be
present on the terminals. Serious Injury will occur if contact is made with connectors.
NOTE: The meter must have a power source in order to function. Power can be provided by an
external 12 Vdc supply (negative ground only) or an internal nine-volt battery.
1.
Locate the tuner in a convenient location at the operating position. If random wire or balanced line
operation is used, the ceramic feed through insulators
will
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 can not be accidentally contacted during operation.
2.
Install the tuner between the transmitter and the antenna as shown in figure 1 below. Use a coaxial
cable (such as RG-8/U) to connect the transmitter (or amplifier) to the connector marked
TRANSMITTER
on the rear of the tuner.
Figure 1
3.
Connect the antenna(s) to the tuner as follows:
IMPORTANT:
The aluminum jumper must be placed from the ground terminal to the bottom balanced
line terminal for COAX 1, COAX 2, or Random Wire Operation. See figure 1.