JRC JRL-2000F User manual

INTRODUCTION
Thank you for purchasing the JRL-2000F, the world's first MOSFET HF linear amplifier. JRC has
designed and produced the JRL-2000F based
on its many years of achievements and experience
with professional transmitters and has taken advantage of the latest design technology. Please read
this manual carefully before operating your new amplifier.
The JRL-2000F has been manufactured under the strictest quality control conditions. Should you
find any damage to the amplifier or encounter any other problems, contact your dealer or nearest
JRC representative.
ACCESSORIES \
Each JRL-2000F is shipped with the following accessories:
Instruction manual
......................................................................................................................... I
Remote Control Unit (NCH-365) ............................. .. ................................................................ 1
Main fuse (15A) ............................................................................................................................ 2
Power amplifier unit fuse (15A) ................... ... ....................................................................... 2
R Control cable plug and plug casing .................... ...... ........................................................... 1
R Dry cell batteries for remote control ........................................................................................ .2
Please check to make sure that all of the above items were received with your JRL-2000F.

CONTENTS
1 . FEATURES ............................................................................................................................... 1
2 . SPECIFICATIONS .................................................................................................................... 3
3
.
BEFORE USINGTHE JRL-2000F ............................................................................................ 4
3.1 InstallationLocation ....................................................................................................... 4
.....................................................................................................................
3.2 Power Supply 4
3.3 Exciters
.............................................................................................................................. 5
3.4 Antennas
............................................................................................................................ 5
.......................................................................................................................
3.5 Grounding 5
..........................................................................................................................
4 . CONNECTION 6
................................................................................ 4.1 Connection to a JST-135 transceiver 7
. ...............................................................................................
4.1 1 Connection diagram 7
.................................................................................
4.1.2 Controlcable wiring diagram 8
.............................................. ................................ 4.2 Connection to a Non-JRC Exciter ........ 9
4.2.1 Connectiondiagram
............................................................................................. 9
4.2.2 Controlcable wiring diagram
............................................................................... 10
5 . OPERATING CONTROLSAND FUNCTIONS ....................................................................... 14
5.1 Front PanelControls ........................................................................................................ 14
5.2 Rear PanelControls
......................................................................................................... 15
5.3 RemoteControl Unit (NCH-365)
.................................................................................... 16
6 . BASICOPERATION ............................................................................................................... 17
6.1 Preparation .................................................................................................................... 17
6.2 OperationModes
............................................................................................................. 17
. .............................................. 6.2.1 Operation of the POWER SUPPLY CONT switch 18
6.2.2 Antennaswitch mode
....................................................................................... 18
6.2.3 Antennatuner mode
............................................................................................. 19
6.2.4 Linear amplifier mode
......................................................................................... 20
6.3 Automatic Tuning Operation
.......................................................................................... 21
.............................................................................
6.3.1 Automatic tuningprocedures 22
......................................................................
6.3.2 JRL-2000Fbandassignment table 24
6.4 SET Operation
.................................................................................................................. 25
6.5 SwitchingAntennas
....................................................................................................... 27
6.6 Adjustingthe ALC Level
.................................................................................................. 28
6.7 Memory Backup
......................... .. ................................................................................. 30
...................................................................................................................... 6.8 Precautions 31
........................................................................................................
SPECIAL OPERATIONS 32
................................................................. 7.1 Erasing Preset Data ........................ ................ 32
................................................................
7.1 . 1 Erasingall datafor a selectedantenna 32
7.1.2 Erasingall datafor a selected frequency band
.................................................. 32
7.2 Write-protecting for Preset Data
................................................................................... 33
........................................
7.3 Usingthe JRL-2000Fas a Dummy Load ....................... ...
33
7.4 UsingMore than 4 Antennas
............................... .. ....................................................... 34
................................................................................................
7.5 Setting the DIPSwitches 35
8 . PROTECTIONFUNCTIONS ................................................................................................... 36
8.1 CoolingFans ................................... ..... ............................................................................ 36
.......................................... ...................
8.2 Causes of Alarms and Corrective Measures .. 36

...................................................
9 . PRECAUTIONS FOR MAINTENANCE AND OPERATION 38
9.1 Cleaningthe Main Unit
................................................................................................... 38
9.2 Maintenanceof the InternalCircuits
............................................................................... 39
9.3 Radio InterferencePrecautions ...................................................................................... 39
..............................................
9.4 PrecautionsAgainst Power SurgeCausedby Lightening 39
10 . PROBLEMSOLVING ............................................................................................................. 40
10.1After-salesService .......................................................................................................... 40
10.2Troubleshooting .............................................................................................................. 40
11 . OPTIONS ................................................................................................................................ 41
12 . ATTACHED DIAGRAMS ........................................................................................................ 42
12.1 ExternalView .................................................................................................................. 42
12.2 BlockDiagram
............................................................................................................. 42
12.3 Connection Diagrams
................................................................................................... 42

1 FEATURES
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 Distortion 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.
FullyAutomatic Antenna Tuner
The JRL-2000F is equipped with a fully automatic, instantly switching antenna tuner which
converts the compositeelements in the matching circuit to the binary system. By storing matching
data for each antenna in the amp's high-capacity memory, antenna matching can be done
instantaneously.
Automatic Antenna Selector
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 matching data for the antenna tuner
to allow instant QSY.
e Automatic FrequencyCounter 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-Efficiency Switching 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.

1 FEATURES
@ Various Protection Circuits
The JRL-2000F incorporates several protection facilities in order to protect the circuitry against
internal and external stresses and overloads such as overdrive and abnormal output loads.
When one of the protection circuits is actuated in the PA unit, the gate bias of the power
MOSFETs are directly controlled, without slow-operating ALC feedback, in order to reduce
the power output. Therefore, should the ALC line not be conected, the PA unit will not suffer
any damage.

2 SPECIFICATIONS
Operating frequency bands
Rated output power
Output impedance
Harmonics
lntermodulation distortion (IMD)
lnput impedance
Exciting power
Frequency switching time
Power supply voltage
Power consumption
lnput power factor
Temperature range
Protection circuits
Dimensions
Weight
: 1.8, 3.5, 7, 10, 14, 18 & 21 MHz amateur bands.
(24
& 28 MHz bands: antenna tuner only)
: SSB 1 kW PEP* 100% duty cycle, 24 hour.
CW 1 kW* 100% duty cycle, 24 hour.
FSKISSTV 1 kW* 100% duty cycle, 114 hour
: 50R unbalanced, VSWR 3.0 (16.7-150R)
: -60dB or less
: -35dB or less below PEP (at 1 kW output)
: 50Q unbalanced
: 100W max.
: Less than 0.1 sec.
: 85 to 264V AC, single-phase
: 2.5 kVA or less (at
1 kW output)
: 95% or more (at 1 kW output)
: -10" to 40°C
: PA excess current; PA overheat; PA abnormal load; AC
power supply excess voltage; power supply overheat;
PA failure; excessive antenna VSWR; exiciting power
excess; and antenna matching anomaly.
: 430(W) x 300(h) x 402(D) mm
: Approx. 28 kg
* Note: Rated output on 200-240V AC. The rated output power on 100-120V AC is 750
W PEP

-
3 BEFORE USING THE JRL-2000F
-
InstallationLocation
When determining a location for installing the JRL-2000F, please take the following criteria
into consideration:
Avoid a place that is exposed to direct sunlight or susceptible to overheating.
Avoid humid or dusty places.
* Do not place containers holding water or other liquids above or on top of the JRL-2000F.
The JRL-2000F draws cooling air in from the front panel and expels it from the rear. Therefore,
do not place any objects within 15 cm of the front and rear panels of the amplifier.
Outlet vent fl Rear $
15 cm mln
JRL-2000F
\ 1 (,
15 cm mln
Use a sturdy table or platform that can easily support the weight of the JRL-2000F
(approximately 28 kg).
Power Supply Requirements
The JRL-2000F consumes approximately 12A of electrical current at an output power of 1000
W when power is supplied at 220 VAC. This must be taken into consideration, along with
the consumption of the exciter, accessories and other home appliances, when choosing an
AC line of sufficient capacity.
For full 1 kW output power a 200-240 VAC line must be used. If a 100-120 VAC line is used,
the maximum rated RF output power is 750W.
If the power outlet has a ground terminal, be sure that the black wire is connected to ground.

BEFORE USING THE JRL-2000F 3
3.3 Exciters
Any HF-band transmitter or transceiver with a 50R RF output impedance can be used as
an exciter for the JRL-2000F. When used with the Japan Radio Co. JST-135 HF transceiver,
additional control features can be utilized to enhance automatic band changing and tuning.
If the maximum output of the exciter exceeds 100W, the over-current protection circuit in the
power supply unit may be activated and the output waveform may be distorted. Therefore,
it is necessary to connect an external ALC signal in order to control the exciter output.
3.4 Antennas
It is recommended that you select antenna(s) that meet the following criteria:
Antenna impedance is 50Q.
When using a beam or vertical antenna equipped with trap coils or balun transformers,
be sure that they are capable of handling at least 1.5
kW PEP input.
Use a coaxial cable with sufficient current capacity for all antenna connections.
If the antenna VSWR value is too high the antenna wave radiation factor drops. Also, in
case of a mismatch of the coaxial cable and antenna, undesired RF radiation may occur,
possibly causing radio interference.Therefore, special care must be taken in order to avoid
these problems.
3.5 Grounding
To prevent electric shock and interference with other devices, connect your JRL-2000F and
all other radio devices to a proper external grounding system. Use the heaviest possiblecopper
wire, braid or strap and follow the shortest possible route. Do not use any gas pipe, water
pipe or cable duct as a ground.

Before connecting the JRL-2000F to an exciter, turn off the power of each radio device and
unplug all power cords from the outlets.
Different methods of connection are used for different types of exciters. Interfacingthe exciter
to the
JRL-2000F is accomplished by connecting various types of signal lines to the control
connector as well as connecting the coaxial cable and grounding cdble.