Features - JRC JRL-2000F Manual

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FEATURES
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48 RF Power MOSFETs
The power amplifier unit is equipped with 4 wide-band amplifier circuits (2SK408/2SK409),
each incorporating 12 high-voltage resistant RF power MOSFETs. As output gain is achieved
by electrically combining the output from these broad-band amplifiers, sufficient output margin
is available so that high-quality full duty cycle output throughout the entire power range is
possible.
• SEPP-type Low Distorfion Power Amplifier
Single ended push-pull (SEPP) circuits are employed. SEPP circuits do not have any of the
shortcomings of conventional transistor-type push-pull circuits, so the JRL-2000F obtains high
output power with superior IMD chracteristics.
• Fully Automatie Antenna Tuner
The JRL-2000F is equipped with a fully automatic, instantly switching antenna tuner which
converts the composite elements in the matehing circuit to the binary system. By storing matehing
data for each antenna in the amp's high-capacity memory, antenna matehing can be done
instantaneously.
• Automatie Antenna Seleetor
Up to four antennas can be connected and selected by front panel switches. The selected
antenna setting can be stored in memory along with the matehing data for the antenna tuner
to allow instant QSY.
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Automatie Frequeney Counter System
A built-in frequency counter automatically reads the frequency of the input signal from the
exciter and selects the correct frequency band. Manual band changing is not required and
any exciter can be used with the JRL-2000F.
• High-Effieieney Switehing Power Supply with PFC
The power supply for the JRL-2000F is equipped with a Power Factor Corrector (PFC) which
corrects the AC input waveform to a sine wave by using the active smoothing circuit method.
This increases the AC line power factor, which previously attained only 50-60%, to almost
100%. This means that power consumption has been nearly halved compared to other
conventional power supplies. With its high-efficiency MOSFET switching regulator, a maximum
continuous power supply output of 2.4 kW can be achieved when this exceptionally powerful
unit is connected to 220 - 240V AC.
• Low Noise Design
The power amplifier and the power supply unit are equipped with MOSFETs which have higher
heat-resistance properties. This reduces the operating time of the cooling fans significantly.
A low noise axial fan mounted in the rear or the chasis also contributes to noise reduction.
Additionally, a full break-in circuit with a compact relay housed in a shielded case reduces
relay operating noise.
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