User's Manual

it is recommended that clamp-on ferrite cores be inserted at both ends
of the remote control cable, ALC cable, coaxial jumper cable, and
antenna cables, as needed. Also, a common mode AC line filter (near
the AC outlet), and in-line low pass filters on the antenna coaxial
cable, (as necessary), are recommended.
2-7 The amplifier has fast acting sophisticated protection circuits
controlled by the latest microprocessor technology. Please note,
however, any such actions that cause the same fault to occur
repeatedly, will lead to failure of the valuable final power FET
transistors. Also note that the full power CW (or carrier) drive under
the erroneous MANUAL BAND SET leads to the failure of the final
power FET’s (See page 14, Section 10. Trial). In this sense, it is highly
recommended that the amplifier is connected to the radio with Band
Data Cable.
2-8 Before checking inside the amplifier, be sure to wait a few
minutes for the high DC voltage to discharge (monitor Vd meter
reading). The internal potentiometers for RF power detector,
protection circuits, FET bias voltage circuit, etc., are precisely adjusted
at the factory, and should not be altered. Doing so, would require
readjustment with precision measuring instruments.
2-9 DC power supply selection is designed with wide AC line voltage
technology and works with any voltage of 200V to 250V as well as
100V to 125V. 200V to 250V line, however, is recommended for the
best stability and performance. Note that maximum output power is
1kW only, when 100V to 125V is connected. Prepare appropriate AC
power cord plug that fits the outlet at your location.
2-10 Before powering on the amplifier, be sure to connect a dummy
load (50 ohms, 1.5 kW min.) or a well-adjusted antenna to the output
terminal. Operating without any load will cause extreme stress to the
RF power FET’s, although protection circuits should work under critical
conditions.
2-11 Required drive power is slightly less than 100 W to obtain the full
1.5 kW output. Do not attempt to operate with excessive drive from a
high power transceiver. Transmitting high drive RF (over 100 W) into
the amplifier will void the warranty.
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