BURST AMPLIFIER 2000A User manual

BURST2000A
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HFLinearAmplifier
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OPERATINGMANUAL

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Table of Contents
1. GENERAL INFORMATION..................................................................................3
1-1. Introduction and Description...................................................................................3
1-2. Owner’s Assistance .................................................................................................3
1-3. Equipment supplied and Options ............................................................................4
1-4. Features ...................................................................................................................4
1-5. Safety Considerations, Explicit Definitions ............................................................4
2. INSTALLATION......................................................................................................5
2-1. Unpacking and Initial Inspection ............................................................................5
2-2. Amplifier Location Selection and Cooling Conditions...........................................5
2-3. Amplifier Connections in the house........................................................................5
2-4. Connections to External Devices (Transceiver, Computer, etc.) ............................7
3. THE PRIMARY INCLUSION AND OPERATION ...........................................10
3-1. Power Saving Mode with low Power Consumption .............................................10
3-2. Front Panel - Control and Display indications ......................................................10
3-3. Primary Power ”ON”.............................................................................................10
3-4. Main Panel display ................................................................................................11
3-5. First Test of Transmission Mode...........................................................................12
4. OPERATION .......................................................................................................... 13
4-1. Changing Operate and Standby Modes .................................................................13
4-2. Bands Change, the Standard and Expanded Frequency Coverage........................13
4-3. Automatic Protection System................................................................................14
5. MENU - SETTINGS AND OPTIONS ..................................................................15
5-1. Menu "MAIN SCREEN" - Options on the main Page.......................................... 16
5-2. Menu "INTERFACE" – Interface selection to control the amplifier work...........16
5-3. Menu "ANTENNA SETTINGS" – Antenna Switch Configuration .....................17
5-4. Menu "ALC SETTING" - ALC installation..........................................................17
5-5. Menu "PA Voltage"...............................................................................................18
5-6. Menu "USER PREFERENCES"...........................................................................19
5-7. "Network Setting" Menu .......................................................................................19
5-8. "Info" Menu........................................................................................................... 20
5-9. Software update.....................................................................................................20
6. REMOTE CONTROL ...........................................................................................24
7. MAINTENANCE....................................................................................................26
7-1. Periodic Maintenance; General Check and Cleaning............................................26
7-2. Fuse Replacement..................................................................................................26
8. SPECIFICATIONS ................................................................................................26
8-1. Parameters .............................................................................................................26
8-2. Functions ............................................................................................................... 27
8-3. Storage...................................................................................................................27
9. DENIAL OF RESPONSIBILITY ......................................................................... 27

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INTRODUCTION GENERAL
The amplifier is very easy to control. With the on-screen menu, the settings can be made even a radio
Ham beginner;
There is the color TFT display with a diagonal of 4.3 inches (95 x 53 mm), and the resolution of 480
x 272 pixels and 24-bit color usage;
There is a possibility of the remote control via Ethernet (option);
The operator is able to track all main characteristics of the operating mode in the exact digital form;
It can be fixed any failure statistics – the non-volatile memory stores the detailed information about
all emergency Amplifier situations;
The modern protection schemes ensure the integrity of the electrical circuits of the device;
Lightweight and compact Amplifier dimensions with respect to its power;
Suitable for use with any transceivers;
Controlled by standard signals. Switching on the transmission mode (PTT) is carried out by applying
zero. The rated input RF power - 15 W;
The transceiver output is well matched with the broadband input. The SWR level is at 1.2:1 in the 1.8
- 54 MHz band range without any additional adjustments;
The current automatic transceiver control system works via CAT Protocol (optional). The Amplifier
monitors continuously the operating frequency and tunes after the band range change itself;
Built-in frequency meter, band range decoder, and AUX connection, in case of non-use of CAT
connection, will determine the frequency and allow the amplifier to correctly control the operating
band range;
FET transistors of the type BLF188 (MOSFET) are able to withstand high levels of mismatch at the
output (high SWR level);
Exceptional electromagnetic compatibility with different sensitivity units allows you to connect the
Amplifier to almost any devices;
High-quality protection against current surges and automatic reactive power compensation is
achieved thanks to a high-quality switching power supply
AC power voltage range (85-300 V).
1. GENERAL INFORMATION
1-1. Introduction and Description
This Chapter describes the installation, operation, and maintenance of the BURST 2000A Power Amplifier
(PA).
BURST 2000A is a modern linear amplifier with the coverage all HF Amateur Radio bands from 1.8 Mhz
to 54 Mhz. The current information about the operating mode displayed on the multi-function color display
with high resolution. BURST 2000A can be controlled either via the buttons on the front panel or remotely
via Ethernet. BURST 2000A optimized for BURST AS05 antenna switch for 5 different antenna systems.
1-2. Assistance to the owner
If you need technical assistance, please contact the manufacturer. You can contact BURST AMPLIFIER
manufacturer via his e-mail: [e-mail] or via website: www.bursthf.com.

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1-3. Supplied equipment and options
The Buyer’s specification of PA consists one box, including:
-BURST 2000A PA;
-Power cord;
-the Instruction Manual;
-Spare fuses: 16A / 250V -2pcs.
1-4. Characteristics
All HF bands, including WARC bands and 6 m band
Output power:
-1,8-30 MHz - 2400 W PEP (SSB and CW);
-50-54 Mhz - 1200W
Rated input power: 15W;
230 V AC mains voltage;
LCD display;
Ethernet control
Modern design;
Intuitive menu;
All kinds of protections:
-SWR;
-overload current protection;
-overheat protection;
-exceeding the input power;
-band range switching error protection (LPF Error).
Acceptable operating conditions:
-Operating temperature range: -10°C (antifreeze) +40°C
-Relative humidity up to 95% (at 35°C)
Device dimensions (without protruding parts) - 352 x 395 x 153 mm.
Weight - 17 kg.
1-5. Security concerns, clear definitions of NET power connections
The BURST 2000A linear amplifier is the device of Class I for protection against electric shock, i.e. the
third power cord ground wire (colored yellow with two green strips) and ground pin on the PA rear panel,
marked GND (Fig. 2-1), must be connected to the house ground system for safety operation.
This User Manual contains safety precautions, cautions and warnings that MUST BE OBSERVED and
COMPLIED by the owner to ensure safety operations and maintenance of the BURST 2000A amplifier.
Precautionary measures
The notes described below refer to this manual:
The WARNING notes draw attention to the procedure that, if not correctly executed, may cause personal
injury or fire hazard if electric shock or lightning strikes. Caution notes pay attention to a procedure that, if
not performed correctly, may result in owner’s equipment damage (not only in the BURST 2000A
amplifier).
Notes NOTE pay attention to the procedure, which, if not performed correctly, can lead to inconveniences.

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WARNING! HIGH VOLTAGE!
Both mains voltage and high RF voltage inside the BURST 2000A amplifier! For its safety, disconnect the
mains plug from the mains and wait at least three minutes before removing the cover of the amplifier.
NEVER LET, ESPECIALLY CHILDREN to have something inserted in the body holes - this will
cause an ELECTRIC SHOCK!
Never touch the antenna or antenna isolators during transfer or settings - this may cause ELECTRIC
SHOCK!
Never expose the amplifier to rain, snow or any liquids. Avoid excessive dusting of the amplifier and long-
term exposure to direct sunlight.
Do not block the COOLING by closing the air ducts or air vents.
CAUTION
Do not repair or replace the hardware of your BURST 2000A amplifier. This can lead to health and life
risks. Such repairs are not covered by the warranty.
The manufacturer is not responsible for any repairs performed by any specialists, uncertified by the PA
producer.
PRECAUTION
To avoid damage (not covered by the producer’s warranty!), please read INSTALLATION - section 2 of
this instruction manual. If you have any doubts or questions regarding the installation, operation or safety
of the BURST 2000A amplifier, please, consult the producer immediately as it recommended above.
2. INSTALLATION
2-1. Unpacking and initial inspection
Unpack and carefully inspect the contents of the cardboard box for possible damage during transportation.
Check the housing, the front panel, display, buttons, rear connectors, the main power switch and fuses.
2-2. Amplifier Location Selection and Cooling Conditions
You will need easy access to the rear panel of the Amplifier to connect the cables and to the buttons and
the screen on the front panel as well.
BURST 2000A is equipped with water-cooling. Place the amplifier so that there are no objects or other
devices closer than 10 cm (4 in) from the rear panel of the amplifier.
PRECAUTION
Avoid any contacts with water, metal objects through the ventilation holes.
2-3. Amplifier Connections in the house.
CAUTION
The amplifier can create a significant load (more than 3 kW) on the local electrical network. From the
beginning, verify the ability of your power net to work with such power consumption.
CAUTION
Never use the house gas pipes for grounding. This can cause an EXPLOSION!

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CAUTION
Do not use the local pipes for heating or water supply for grounding! You can create a dangerous tension
on them. You can endanger not only yourself, but also other people in the house.
PRECAUTION
Remember please, that the ground wire can withstand emergency currents of more than 20 A with a
minimum voltage drop. Therefore, you may need to connect the ground with a thicker wire.
a) GND Bolt – at the beginning, please, connect the ground pin of the amplifier (located on the rear panel
and marked GND - Fig. 2-1) to the house grounding system.
b) Socket “KEY-IN” input of the amplifier to control the reception / transmission from the transceiver.
c) “ALC Connector” – please, connect this socket to the appropriate input of Your transceiver.
d) “RF INPUT” - Connect the transceiver output (antenna socket) to the RF INPUT amplifier socket by the
coaxial cable with PL-259 jack.
PRECAUTION
To avoid any damage, turn off the internal antenna tuner of your transceiver.
e) “RF OUTPUT” – Please, connect RF OUTPUT plug on the back of the amplifier to the antenna or to the
antenna switch by any suitable coaxial cable with the PL-259 jack.
PRECAUTION
If you are using an amplifier for the first time in your home, pay your attention to the marking of the coaxial
cable from the output of your amplifier to the antenna. The cable must be capable of withstanding increased
power, especially at 10m and 6m bands. This warning applies equally to the antenna switch, tuner and the
entire antenna system.
We recommend you use RG213 type cable or better.
f) Check the power switch position. It should be “OFF” for disconnection of the amplifier from your local
power net.
g) Mains fuse.
h) Power cord Socket.
i) Ethernet (LAN) Connector for remote control of the amplifier via PC.

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2-4. Connections to External Devices (transceiver, computer, etc.)
a) “Control” connector used to connect and work with different transceivers models, as well as to update
the software (see table 2-1).
Most modern transceivers can be connected via CAT or BAND DATA to BURST 2000A. This will allow
the amplifier to monitor the transceiver frequency and automatically change the range and operating modes.
The cable can be ordered in the kit additionally, supplied separately, or independently manufactured at
home in accordance with table 2-1 and the transceiver manual.
Table 2-1 shows the signals and outputs of the “CONTROL” connector - the rear panel of the amplifier.
Table 2-1
Control PIN PIN NAME DESCRIPTION SPECIFICATIONS

interface
N
O. 

1 GND Ground 0 Volt

2 Port 0 Bit 0 TTL input

3 Port 1 Bit 1 TTL input

4 Port 2 Bit 2 TTL input

5 Port 3 Bit 3 TTL input

6 RxD Received Data RS232 input

Rear panel 7 CTS Clear to Send RS232 input

view 8 RxD Received Data TTL input

9 CTS Clear to Send TTL input

10 KEY-IN Tx Request Less than +12V / 2mA

11 TxD Transmitted Data RS232 output

12 RTS Request to Send RS232 output

13 TxD Transmitted Data TTL output

14 RTS Request to Send TTL out
p
ut 


15 ALC
Automatic Level
Control 0(-12)

b) Connector. “Ant Switch / AUX” is used to connect the Antenna Switch, as well as, to control the band
range filters (LPF) of the amplifier directly.

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
Ant.Switch/AUX PIN
PINNAME
interface NO.
1GND
23.5
37
410
514
918‐21
1025‐28
1350‐54
14PTT
15
24V(no
switchable)
612V
7Ant2
8Ant4
11Ant1
12Ant3
Table of the amplifier connections to COM Port (RS232)
Cable diagram "Control (15 PIN) to COM Port (RS232)”
(This cable is used when updating the software or connecting some transceivers (e.g. KENWOOD) via a
CAT interface)
Control PIN
PINNAME
COMPort

COMPINNO.


interface NO.

Rearpanel
view 
1 GNDGND5

11TxDRxD2

6RxDTxD3


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ICOM transceivers connection table:
1) ICOM Band Data
 

Control PIN PIN NAME ICOM PIN NAME ICOM DESCRIPTION 
interface
N
O. 

1 GND GND Ground

Rear panel 2 Port 0 BAND
BAND voltage output
(Varies with amateur
band)

view 3 Port 1 8V Regulated 8V output

10 KEY-IN SEND
Input/output pin. Goes to
ground when transmitting.
When grounded, transmits.

15 ALC ALC ALC voltage input

2) CI-V interface
Control PIN PIN NAME JACK 3.5 mm (2 pin) 
interface
N
O. 

Rear panel
view
1 GND GND (sleeve)

2 Port 0 tip

3 Port 1 tip

YAESU transceivers connection table
 

Control PIN
PINNAMEYAESUPINNAMEYAESUDESCRIPTION
interface NO.
 

 1 GNDGNDGround

Rearpanel 2 Port0BANDABANDDATAA

view  3 Port1BANDBBANDDATAB


4 Port2BANDCBANDDATAC


5 Port3BANDDBANDDATAD

10KEY‐INTxGND
T/RControlofyourlinear
amplifier

15ALCALCAutomaticLevelControl


  


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3. THE PRIMARY ACTIVATION AND OPERATION
PRECAUTION
Do not turn the amplifier on for at least two hours after unpacking and setting it to its final operating
location. Please, pay your special attention whenever the amplifier is moved from a very cold place to a
very warm place, because the water condensation may appear inside of the body, resulting in damage to the
high voltage circuits of the amplifier. Under these conditions, do not turn on the amplifier for at least 4
hours.
After following all the instructions in section 2 "INSTALLATION", check whether the power switch on
the rear panel is turned off. Then plug the amplifier into the local electrical outlet.
3-1. Power saving mode with low power consumption
Now you can turn on the power switch on the rear panel of PA. This only activates the low power standby
mode of the amplifier power supply and the red LED on the ON/OFF button will light up while the main
power supply is still off and the display is dark.
3-2. Front Panel - Control and Display indications
a) “ON/OFF“ Button. When the power switch on the rear PA panel is in the position “ON”, press to turn
on the amplifier. When the amplifier is on, press to turn it off (standby).
b) LED indicator is above the ON/OFF button. When the red light is on and the screen is dark, the amplifier
is in standby mode and can be turned on by pressing the ON/OFF button while the LED goes off.
This LED (b) flashes – it’s an additional indication when one of the internal protection systems is activated..
Pressing the ON/OFF button will reset the protection.
c) There are six (6!) function buttons for manual (local) control of the amplifier. The function of each button
is displayed above it. Depending on the menu displayed, the buttons may have different functions.
d) The color display shows you the full information about PA work conditions.
3-3. Primary Power ”ON”
To start the amplifier, press the ON/OFF button on the front panel - after eight seconds (boot sequence),
the display will show you the main screen - figure 3-2 ,
The amplifier can be started from the standby mode either by the ON/OFF button or by remote control.

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3-4. Main Panel display
Picture 3-4
There are 10 information zones on the main display screen:
(a) Information area for the current range or frequency.
(b) Operating values.
The main operating parameters are displayed: voltage and current consumption of the output stage UM;
input power; reflected wave power. These parameters are optionally selected in the main SCREEN
submenu.
c) operating mode Indicator - OPERATE, STANDBY
d) RECEIVE/TRANSMIT indicator – displays the mode of operation of the amplifier. The white indicator
RECEIVE, and TRANSMIT - red.
e) Bargraph and digital value - displays the power input.
f) Bargraph and digital value – displays the standing wave ratio.
g) Bargraph and digital value – displays the temperature of the cooling PA system.
(h) interface Information.
(i) Antenna switch Control.
j) the exact Number of the using Antenna is Displayed.
k) Power output mode indication.
l) Mode for working in digital modes.

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3-5. First Test of Transmission Mode
To verify that you have installed the amplifier correctly, make a test transfer as described below. Perform
these tests for each band and each antenna, and after installing a new or refurbished antenna, antenna switch,
and jumper cables.
a) Check the connection circuits of the transceiver, amplifier and antenna.
For this test the amplifier must be in STANDBY or RECEIVE modes.
First of all, please, check that the signal reception level on the transceiver connected to this amplifier is
normal. You should also check the SWR of the antenna system, set the transceiver to the nominal output
power level for the amplifier (about 15W), make a test transmission in a constant carrier mode. Follow the
indications on the display.
If you observe a significant degradation in reception or SWR value above the permissible value, at first
check the coaxial connections to the amplifier, then the serviceability and the proper antenna selection.
NOTE!
If “Hi SWR” protection system is activated, at the beginning pay attention to the PA VOLTAGE settings.
The limit of permissible SWR value depends on this setting, see section (7-1 (e).
If PA is connected to the transceiver via the ALC line, in this case the amplifier will install a ban on the
transmission mode of your transceiver.
If the signal reception is normal and SWR acceptable, put the transceiver functions as follows:
- select continuous carrier modulation type (CW, RTTY);
- set the minimum power on the transceiver;
- if the transceiver has a built-in antenna tuner, turn it off.
Now in the receive mode, select the frequency that is not busy at the moment, press the OPR/STBY button
and press shortly the PTT or TX button, watching the output power and SWR readings. If any of the
protections are not triggered, the desired range is set
(in AUTO mode),increase the input power to the desired value (no more than 15W). If emergency
protection appears on the screen, correct the cause based on this message. See section (4-3)
- PA CURRENT shall not exceed 65A

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- PA VOLTAGE . Voltage PA could be regulated by “ VOLTAGE” in the range of 42v – 58v; but the
nominal voltage is 54 V.
- SWR(VSWR). At the rated voltage should be lower than 2:1
- PA TEMPERATURE should not exceed 85°C;
b) electromagnetic compatibility (EMC)
Having in mind that the amplifier power exceeds the power of the transceiver significantly, the following
problems can occur:
the magnetic field can be induced on the microphone, the Telegraph key, on the computer, monitor,
keyboard, computer mouse, etc.
It should be noted that the requirements for antenna systems, coaxial connections, and grounding are much
higher.
All wires, connecting to the computer, power sources should be as short as possible. It is also recommended
to use ferrite rings on these wires.
4. OPERATION
4-1. Changing RX / TX and Operate / Standby Modes
a) In the STANDBY position as well as in the PA position “ OFF”, the amplifier operates in bypass
mode. In this mode, the KEY-IN control input does not affect any operation modes. In AUTO mode
bandpass filters (LPF) are not switched.
b) In the mode OPERATE:
-when the KEY-IN (position of OPERATE / RECEIVE) is open, the transceiver receives signals
from the antenna as in bypass mode;
-when the KEY-IN body is closed (OPERATING / TRANSMIT mode), the RF signal is amplified
and fed to the antenna via the RF OUTPUT connector.
IMPORTANT NOTE!
In AUTO mode, if there is no or an insufficient RF signal from the transceiver, the amplifier
will not enter to OPERATE /TRANSMIT mode because in this case PA will not be able to
determine the frequency and prevent accidental switching to the wrong range filter (LPF).
4-2. Bands Change, the Standard and Expanded Frequency Coverage
When PA is connected to the transceiver via CAT-interface, the amplifier displays the current frequency
and switches the band ranges automatically. Without such CAT connection, the band ranges can be
switched manually or automatically by the built-in frequency meter.
To change the bands range in AUTO mode automatically, please make a short pre-transmitting in CW or
SSB mode (3ms is enough) before the main transmission.
In MANUAL mode the band ranges are changed manually by using the BAND buttons (up or down). If
the tranciever frequency is outside the frequency range of the amplifier, the transmission request will be
rejected and the following error message will be displayed:

14
4-3. Automatic protection system
The internal control unit of PA monitors most of the analog and logic signals of the amplifier in all modes:
the receive / transmit control signal, the contact positions of the output relay and the switching time, the
frequency and power of the transceiver (the input power of the amplifier), the current of the powerful
transistors of the final stage, the radiator temperature, the temperature of the components of the main power
supply, the output power, the value of the SWR and etc.
If the maximum value of the parameter is exceeded, one of the protection levels will be activated, as
described in the paragraphs below. Each event is accompanied by a warning text on the screen (Fig. 4-1)
and an additional indication in the form of a flashing LED on the ON/OFF button. It will also be a beep, if
it is set to "USER PREFERENCES".
Figure 4-1 - Appearance of the emergency message

15
To reset the protection, press the ON/OFF button once. The amplifier will automatically enter "STANDBY"
mode. Before continuing to the PA transmission, please remove the cause of activation of the protection
control system in accordance with the screen message.
5. MENU - SETTINGS AND OPTIONS
By pressing the SETTINGS button (right) the user brings up the menu selection screen (Fig.5). Each menu
can be selected with the ITEM (up and down) and SELECT buttons.
The items in each menu are selected and controlled by the same six buttons as on the main screen. The
selected values are displayed in blue. Inactive Windows remain dark until the corresponding functionality
is added (please, see picture 5).
Picture 5 – Menu Choice

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5-1. Menu "MAIN SCREEN" - Options on the main Page
5-2. Menu "INTERFACE" – Interface selection to control the Amplifier work
1) AUTO – range recognition by frequency;
2) AUX – direct control of bands filters (LPF);
3) ICOM band decoder for ICOM transceivers;
4) YAESU – BAND DATA for Yaesu transceivers;
5) CAT – connecting transceivers via CAT interface;
6) MANUAL – manual bands switching.

17
5-3. Menu "ANTENNA SETTINGS" – Antenna Switch Configuration
5-4. Menu "ALC SETTING" - ALC installation
1) POW. Level - enable ALC and set output power: ALC OFF; High; Middle; Low;
2) ALC Level - setting the reference negative voltage;
3) ALC Protect - on/off the locking voltage when the protection is triggered.

18
IMPORTANT NOTE!
When you set ALC OFF, the ALC system is disabled!
It is necessary to set the power of the transceiver 15 watts!
The ALC setting is to set the negative voltage for the nominal input power of 15-18W.
1) Connect the transceiver to PA via the ALC circuit.
Note: if there is no this connection in the interface cable!
2) Select the menu item ALC Level
3) Switch on the transceiver for transmission in the constant carrier mode
Note: the power on the transceiver can be set, for example 100W.
IMPORTANT NOTE!
The maximum allowed power for RF INPUT IS 100W.
Set a negative voltage with the help of buttons ITEM , which will correspond to the rated input power 15-
18 watts, guided by the readings on the display.
4) Click APPLY to save the settings.
5) If necessary, set the output power to High; Middle; Low.
Note: when setting ALC OFF, ALC Level setting is not available.
5-5. Menu "PA Voltage"
Setting the voltage of the amplifier output stage (42V-58V). Please, pay yr attention to the fact, that this
setting affects the maximum permissible SWR value of PA (see section 7-1), and the peak value of the
maximum output power of your PA.

19
5-6. Menu "USER PREFERENCES"
1) Setting the welcome message;
2) ON / OFF key press sounds.
3) Setting the display brightness;
4) On/Off sound of keystrokes and the internal protection system.
5-7. "Network Setting" Menu

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5-8. "Info" Menu
5-9. Software update.
The amplifier BURST 1000A provides two types of updates: graphic and software/firmware, connect Your
amplifier to PC via COM Port or USB/COM (you MUST SPECIFY 115200 bps IN the PORT SETTINGS)