Yaesu FT-991 Operating Manual page 141

i
nstallation of
Fc-40 e
xternAl
The FC-40 makes use of the control circuitry built into the transceiver, which allows the operator to control and monitor
automatic operation of the FC-40, which mounts near the antenna feedpoint. The FC-40 uses specially selected,
thermally stable components, and is housed in a waterproof case to withstand severe environmental conditions with high
reliability.
A carefully-chosen combination of solid-state switching components and high-speed relays allows the FC-40 to match
a wide variety of antennas to within a 2:1 SWR on any amateur band frequency (160 through 6 meters), typically in less
than eight seconds. Transmitter power required for matching may be as little as 4 - 60 Watts, and matching settings are
automatically stored in memory for instant recall when the same frequency range is selected later.
Please see the FC-40 Operating Manual for detailed information.
Interconnections to FT-991
After mounting the FC-40, connect the cables from the
FC-40 to the ANT and TUNER jacks on the rear panel
of the FT-991 Transceiver.
Install the supplied ferrite
core as close to the con-
nector as possible.
FT-991 O
peraTing
A A
utoMAtic
M
anual
o
ptional
(
t
ntennA uner
Antenna Terminal
Antenna Cable (5 m)
Control Cable (5 m)
a
ccessories
W A
For ire ntennA
ANT
GND
Wrap the ends of the waterproof
cap with the supplied sealing
tape to protect against moisture
ingress.
Page 139
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