Yaesu FL-2000B, Instruction Manual

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ANTENNA REQUIREMENT
The FL.-2000B has been designed for use with an antenna resonant at the operating
frequency and having approximate impedance within the limit of 40 to 80 ohms. The
nominal output impedance of the FL-2000B is 50 ohms. When the impedance of the
antenna used is far from this value, it is recommended that an antenna matching
network be used which will allow the FL-2000B to work into its nominal 50 ohm load
for maximum power transfer into the antenna.
GROUND REQUIREMENT
The FL-2000B should be connected to a good earth ground through as
short and as large a gauge wire as possible for best performance and maximum
safety. A connecting post marked "GND" is provided on the rear apron of the
chassis.
CAUTION
NEVER OPERATE THE FL-2000B WITHOUT FIRST CONNECTING IT TO AN
EARTH GROUND, AND AN ANTENNA OR 50 OHM DUMMY LOAD, OR SERIOUS
DAMAGE MAY RESULT.
EXCITER REQUIREMENT
To operate the FL-2000B at its maximum power input, it will be required that the
exciter deliver 100 Watts PEP SSB output. Our FT-400/500, FT-560, FT-200 and
FT-101 transceivers and FL-400 transmitter all have sufficient power to drive the
FL-2000B at its maximum input. The exciter should be placed as close to the
amplifier as practical to avoid long coax and ground connections.
ALC
On the rear of the FL-2000B, a terminal is provided for connection to the exciter of
the ALC voltage which controls the gain of the exciter to prevent distortion caused by
peak clipping.
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