MFJ-869 MFJ Giant automatic SWR/Wattmeter
Instruction Manual
©
2009-2010 MFJ Enterprises, Inc.
6
Back Panel
MFJ ENTERPRISES, INC.
STARKVILLE, MS USA
GROUND
TRANSMITTER
ANTENNA
+
POWER
12VDC
350mA
RS-232
AMP
ENABLE
OUT
AMP
ENABLE
IN
RLY
RoHS
Made In USA
Figure 2. MFJ-869 Back Panel.
•
Amp Enable In:
RCA phono connector for connecting to the radio’s amplifier control output.
•
Amp Enable Out:
RCA phono connector for connecting to the amplifier’s relay control input.
•
Power:
This jack accepts a standard 2.1 × 5.5 mm coaxial plug with positive center and negative
sleeve. The unit requires 12 volts DC at up to 350 milliamps. The use of a regulated supply is not
mandatory but is recommended for best performance. An optional 12 volts DC 500 milliamp power
supply, the MFJ-1312D, is available from MFJ Enterprises, Inc.
WARNING: Do not apply voltages greater than 18 volts to this unit, or permanent damage
to the unit may result.
