
MFJ-926B HF Automatic Remote Antenna Tuner
Instruction Manual
2010 MFJ Enterprises, Inc.
5
•
ANT Button:
Used in conjunction with other buttons for changing functions in the MFJ-926B.
•
POWER Button:
Used to turn the power on and off. When the power is off, the tuner is placed in
bypass mode and Antenna is selected. When turning on the power, the tuner powers up in the bypass
mode, but will resort to a previously stored setting upon application of RF power. The POWER
button should always be left on. Power is turned on and off externally.
WARNING:
Do not turn the power on and off rapidly, otherwise the tuning setting
memory can be corrupted and the unit will have to be reset to factory defaults.
Note:
When the tuner power is OFF, the tuner is in bypass mode and RF from the transmitter
goes directly to the antenna with no matching.
Connections
•
Transmitter:
SO-239 connector for coax cable from transmitter or transceiver. A MFJ-4117 bias
tee is connected in-line between the transmitter output and this connector. This provides 12 volts DC
on the coax to power the tuner. The MFJ-4117 is included with the MFJ-926B.
•
Antenna:
SO-239 connector for coax cable from antenna, or binding post for wire antennas. The
ANTENNA
connector is internally connected to the
WIRE
binding post.
Note:
When using the ANTENNA connector, make sure to remove the wire antenna, if any, from
the WIRE binding post.
•
Ground:
Wing-nut terminal for RF ground wire connection.
•
Wire:
Binding post for connecting single wire antennas. Notice the
WIRE
binding post is internally
connected to the
ANTENNA
connector.
Note: When
using the WIRE binding post, make sure to remove the antenna, if any, from the
ANTENNA connector.