MFJ-4113TR Instruction Manual
TX/RX SWITCH
3
WARNING!!!!!!
12VOLTS DC is present on this
connector when the unit is swiched on. Do not short the
center pin of the connector to ground. Do not insert a
Balun or other device between this connector and the
antenna that has a DC ground connection or will prevent
the DC from passing through it.
Operation:
When properly connected to the transiever, the MFJ-4113TR will operate in
conjunction with the radio switching the antennas automatically from tx to rx
without input from the operator.
•
When the unit is off, the transmit antenna is selected by default.
•
When the unit is on, the Loop antenna is connected to the transceiver.
•
When the unit is on and the key line voltage is shorted to ground, the
Xmit antenna is selected.
Technical Assistance
If you have any problem with this unit first check the appropriate section of this
manual. If the manual does not reference your problem or your problem is not
solved by reading the manual you may call
MFJ Technical Service
at
662-323-
0549
or the
MFJ Factory
at
662-323-5869
. You will be best helped if you have
your unit, manual and all information on your station handy so you can answer
any questions the technicians may ask.
You can also send questions by mail to MFJ Enterprises, Inc., 300 Industrial
Park Road, Starkville, MS 39759; by Facsimile to 662-323-6551; or by email to
[email protected]. Send a complete description of your problem, an
explanation of exactly how you are using your unit, and a complete description
of your station.