MFJ -1886TR Instruction Manual page 4

Connections
12VDC
Connect your linear supply included with the MFJ-1886TR to this port. The power requirements
are 12-14VDC at 500mA.
TRANSCEIVER
RF input from your transceiver.
XMIT ANTENNA
The terminal for the transmit antenna. When off or power is removed the transceiver is
connected to the transmit antenna.
LOOP ANTENNA (DC PASS)
The loop antenna is connected to this port. Do not short the center pin to ground or add a balun
with continuity to ground to this port.
KEY
RCA terminal to connect to the SEND or KEY output of the transceiver. This is usually the
connection used to key an amplifier. Check your radio manual for the proper connections.
Operation
When off the transmit antenna is selected by default.
?
When ON the Loop Antenna is connected to the transceiver.
?
When the KEY line is shorted to ground the transmit antenna is selected and the power is
?
disconnected from the loop amplifier.
TRANSCEIVER
12VDC
+
-
POWER
Bias-Tee with
ON
Transmit/Receive
Antenna Switch
OFF
XMIT ANTENNA
KEY
MFJ-4113TR
LOOP
ANTENNA
DC PASS