Yaesu FT-991 User Manual

Page 139FT-991 OperaTing Manual
installation of optional accessories
Fc-40 externAl AutoMAtic AntennA tuner
(
For Wire AntennA
)
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.
Antenna Cable (5 m)
Control Cable (5 m)
GND
ANT
Antenna Terminal
Install the supplied ferrite
core as close to the con-
nector as possible.
Wrap the ends of the waterproof
cap with the supplied sealing
tape to protect against moisture
ingress.

Yaesu FT-991 Specifications

General

Frequency Range Transmit	1.8 MHz - 54 MHz, 144 MHz - 148 MHz, 430 MHz - 450 MHz
Antenna Impedance	50 Ohms
Antenna Connector	SO-239
Supply Voltage	13.8 V DC ±15%
Modes	SSB, CW, AM, FM, C4FM Digital
Display	3.5-inch color TFT LCD
Weight	4.3 kg