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OM POWER OM2000A+ Manual

Shortwave plus 50 mhz power amplifier
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MADE IN SLOVAKIA
OM2000A+
SHORTWAVE PLUS 50 MHz
POWER AMPLIFIER
WWW.OM-POWER.COM
OM Power, s.r.o. 93030 Báč 126,
SLOVAKIA
Contact : +421 905 321 410
e-mail
: om-power@om-power.com
1
e-mail
: om-power@om-
power.com

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Summary of Contents for OM POWER OM2000A+

  • Page 1 MADE IN SLOVAKIA OM2000A+ SHORTWAVE PLUS 50 MHz POWER AMPLIFIER WWW.OM-POWER.COM OM Power, s.r.o. 93030 Báč 126, SLOVAKIA Contact : +421 905 321 410 e-mail : om-power@om-power.com e-mail : om-power@om- power.com...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS 1. GENERAL INFORMATION .................. 1.1. Introduction …………………………………………………………………. 4 1.2. Specification …………………………………………………………………. 4 1.2.1. Parameters …………………………………………………………. 4 1.2.2. Protection Circuits …………………………………………………………. 5 1.2.3. Features …………………………………………………………………. 5 1.2.4. The Advantages of OM2000A+ …………………………………………… 2. SAFETY INSTRUCTIONS …………………………………………………………. 6 3. GENERAL DESCRIPTION ………………………………………………………….
  • Page 3 7. APPENDIX ……………………………………………………………. 7.1. Primary AC selection …………………………..………………………. 7.2. Removing the HV Transformer ………………………………………….. 7.3. Controlling OM200A+ with FLEX Radio Series 6xxx …..…………………. 7.4. OM2000A+ Remote Control ………………………………………………. 7.5. Remote Control using own public IP Address ........7.5.1. Changing OM2000A+ connection settings ..........7.5.2.

  • Page 4: General Information

    1. GENERAL INFORMATION 1.1. Introduction he OM Power model OM2000A+ is designed for all short wave amateur bands from 1.8 to 29.7 MHz (including WARC bands) plus 50 MHz and all modes. It is equipped with a ceramic tetrode FU-728F.

  • Page 5: Protection Circuits

    1.2.2. Protection Circuits There are several protection circuits used in the amplifier. They are activated when one or more parameters exceed defined values or some unwanted condition occurs. VSWR too high • Anode current too high • Anode voltage error •...

  • Page 6: Safety Instructions

    2. SAFETY INSTRUCTIONS DANGEROUS HIGH VOLTAGE INSIDE! The power amplifier is using high voltage up to 3200V DC, which is very dangerous for human life! Read next safety instructions carefully first, before you will start to install and operate power amplifier! NEVER VIOLATE THE FOLLOWING SAFETY RULES! NEVER ALLOW CHILDREN to play around PA or to touch power amplifier or connected cables in working condition, or to push anything into the case holes! Never turn the amplifier on without the upper lid in place.

  • Page 7: General Description

    CAUTION The amplifier must be installed in such a way that free flow of hot air from the tube is allowed. The amplifier must not be installed in a constrained surrounding (i.e. tight shelves etc.). During extended operation the tube ventilation grid can reach high temperature. Do not touch it! The amplifier must be properly grounded during operation During operation the amplifier must be installed in such a way that the rear side remains accessible.

  • Page 8: Power Supply

    Top view on the opened OM2000A+ Tetrode FU728F Blower Power Supply Board Switch-ON Board Output Pi-L Circuit Tuning Capacitor Front Subpanel transformer 3.2. Power Supply This Power amplifier uses one 3 KVA toroidal transformer. A soft start is provided using relays and resistors (placed on the switch-ON board).

  • Page 9: Safety Devices

    abt. 3200V DC) @ 1.2A. Each has its own rectifier and filter. In the high voltage circuit, safety resistors are employed to protect the amplifier against overload (placed on the power supply board). The separate screen grid supply is regulated and stabilized with MOSFET circuits and delivers abt. 330V DC at 100mA.

  • Page 10: Grounding

    4.1. Grounding The amplifier has to be grounded properly! Connect the screw on the rear panel of the amplifier to your local grounding system with a copper cable; use a cross-section of 4 at least. Connect your transceiver to the same grounding system of your shack carefully! Use minimum length cables and make certain that the connections are both physically and electrically sound.

  • Page 11: Control Cable

    4.3. Control Cable Control cable maintains TX / RX switching of the PA (TX GND). The cable is shielded. On the side of the power amplifier a CINCH-socket is used. On the side of your transceiver you have to use a socket suitable for this transceiver.

  • Page 12: Operation

    5. OPERATION Before switching PA on, make sure that amplifier is grounded, antenna or dummy load is connected, and line cord is plugged into the outlet. Be sure you have selected the proper AC input TAP (Sect 7.1) Do not turn PA on for at least 2 hours after unpacking and located in its operating location.

  • Page 13: Om2000A+ Control

    OPR/STBY Short press for switching betwen STBY and OPERATION mode. ON/OFF Long press (1 sec.) for switching the PA ON (tube heating first), 2 seconds for PA OFF. Always use the ON/OFF button as this allows for a predetermined (software controlled) time to cool down the tube and inside the PA compartment.
  • Page 14 INFO Information display shows basic information about the PA: serial number, Type of supported TCVR and software version, time ON, tube serial working number and nominal Main voltage. frequency are visible on the The information screen also provides an display. overview of the last 20 warnings and faults: AUTO LED is ON.
  • Page 15 Screen shows settings possibilities for CAT, ANTENNA, DISPLAY, NETWORK Type of supported TCVR and SETTING, EBS, BLOWER and other working INFO. frequency are visible on the Scroll to CAT SETTINGS (up or down display. press SET. AUTO LED is ON. Scroll to your TCVR family (up or down) select appropriate bit rate (left or right) Type of supported TCVR and...
  • Page 16 You selected IC7800 addr.6AH and 19200 Bd. Press SET to write to the memory, Type of supported TCVR and then press EXIT to go back to the working SETTINGS possibilities. “SET OTHER ADDRESS” means that you frequency are visible on the display.
  • Page 17 Next SETTINGS position is for display Type of supported TCVR and parameters. First choose the background working color. Scroll on it and choose the color frequency are visible on the (left/right). display. Press SAVE twice, then scroll to OWN AUTO LED is ON. CALL.
  • Page 18 Type of supported TCVR and working Use next lines and set brightness and sound volume (use up/down frequency are visible on the display. left/right). Confirm with SAVE. AUTO LED is ON. Press NETWORK SETTING and then press ENTER. Type of supported TCVR and working frequency are visible on the display.
  • Page 19 Next lines are for EBS (Electronic Bias Type of supported TCVR and Setting) ON/OFF level working selection. frequency are visible on the recommend next display. comment for more details. AUTO LED is ON. Electronic Bias Settings (EBS) is a significant feature of this power amplifier. It automatically allows lower plate current after pressing the PTT, regardless of whether operating CW or SSB mode, when no RF signal is present at the input.
  • Page 20 In the next line you can define working mode of the blower. In the first mode Type of supported TCVR and speed depends on the PA temperature working (TEMP), mode speed increases maximum, frequency are visible on the ALLWAYS mode means maximum speed display.

  • Page 21: Preparing For Operation

    It will take 180 seconds. Turning PA ON is possible ONLY from the home screen! If you have other display active, press EXIT more times to go back to the home screen. (These same functions are also available on the OM Power Remote Control PC Application) The “Tube Heating Timer” is visible on the Type of supported TCVR and working display.
  • Page 22 FREQ button has two functions. It allows Type of supported TCVR and working displaying the working frequency or active frequency are visible on the display. band segment. NOTE: If CAT is used the working frequency will be read directly from the AUTO LED is ON.
  • Page 23 We are in the settings mode again, but Type of supported TCVR and working with a new submenu called INFO. frequency are visible on the display. Scroll to INFO and press SHOW. AUTO LED is ON. Type of supported TCVR and working A new button is visible –...
  • Page 24 Pressing MEAS displays this screen. Type of supported TCVR and working Instantaneous values basic amplifier parameters are displayed. frequency are visible on the display. NOTE: You can FREEZE the screen and/or allow constant monitoring. AUTO LED is ON. Three different bar graphs can be defined Type of supported TCVR and working using BARG1, BARG2 or BARG3 buttons.
  • Page 25 Type of supported TCVR and working Press EXIT to go back to the Menu frequency are visible on the display. display, then press SERVICE. AUTO LED is ON. Now we are in the SERVICE settings Type of supported TCVR and working mode.
  • Page 26 Go to SET EBS1 AUTO and press SET. Type of supported TCVR and PA will automatically set 20mA of EBS. working You can try to do this manually, too. frequency are visible on the display. Scroll to SET EBS1 MANUAL and press SET. Use up/down buttons to set 20mA or as close AUTO LED is ON.

  • Page 27: Operation Mode

    5.4. Operation mode Before switching to operation mode, check all connections between PA and TCVR. We are now back in the Main display, bar Type of supported TCVR and working graphs defined, antennas preprogrammed, frequency are visible on the display. CAT was set.
  • Page 28 M-TUNE means entry into the manual tuning mode. It allows fine tuning of the PA, especially in cases where the antenna impedance is different from real 50 Ohms. For proper adjustment we need to show Screen current (at least). By Pressing M-TUNE. A new screen is visible and TUNE and LOAD adjustment sliders appear.
  • Page 29 Output power is 1507W, reflected power about 4W and screen current is about -8 Type of supported TCVR and working frequency are visible on the display. NOTE: If your antenna impedance is different than real 50 Ohms then it is necessary start M-TUNE...
  • Page 30 Press PTT, check the Ig2 (I Screen on the display). If it is ok (0-20mA), gradually increase the • input power until the PA reaches about 70% of its maximum output power. Using the TUNE buttons, adjust for maximum FORWARD POWER while monitoring the Screen •...

  • Page 31: Maintenance

    6. MAINTENANCE 6.1. Indication of Fault Conditions If a fault condition appears during the operation of the amplifier, the safety circuits of OM2000A+ will react immediately. There are several types of warning or fault messages that may appear on the display when any of the protection circuits are activated.
  • Page 32 AUTO LED is ON. Never try to change or move any part inside the amplifier except the tube or fuses. Substitution of parts may void intrinsic safety! Manufacturer’s contacts: OM POWER, s.r.o. 930 30 Báč 126 SLOVAKIA Email: om-power@om-power.com Array Solutions...

  • Page 33: Fuse Replacement

    6.2. Fuse Replacement The user is allowed to change mains fuses (6.3 x 32mm), accessible from the rear panel, only. In the case of fuse (fuses) interruption inside the power amplifier, exchange can be carried out only by professionally qualified persons! Internal fuses are located mainly on the SWITCH-on board (next to the HV transformer).
  • Page 34 NOTE: The correctness of the Primary AC voltage influences the tube heater voltage, which must be in the range of 8.5 – 9.3V. If it is lower or higher, change the transformer Tap voltage to better match your Mains Voltage. Side view on the opened OM2000A+ HV Transformer AC Selector...

  • Page 35: Removing The Hv Transformer

    AC selector range can be changed according to the specific conditions in individual countries. Default settings is 220V – 240V AC / 50Hz (230 – 240 V AC , 60 Hz for US market ). If you need different settings in the range of 200 – 260V, this should be specified in the order! 7.2.

  • Page 36: Controlling Om200A+ With Flex Radio Series 6Xxx

    – a hardware COM port in your PC or an USB to serial port adapter. Connect the chosen COM port and the transceiver port ( TCVR DB9 )to the OM Power amplifier with a null modem serial cable (both ends of the cable have a female DB-9 connector and pins 2 and 3 are crossed).
  • Page 37 Flex Radio 6xxx series connection using USB output Connect from the Flex USB port directly to the TCVR port on the OM2000A+ using an USB – FTDI port adapter and serial a null modem serial cable (both ends of the cable have a female DB-9 connectors (pins 2 and 3 are crossed).

  • Page 38: Om2000A+ Remote Control

    6XXX. 7.4. OM2000A+ Remote Control The OM Power team has developed special software which allows controlling the PA OM2000A+ remotely. Download it from the official OM Power website http://www.om-power.com/downloads. The software allows the following controls: Switch the PA ON and OFF •...
  • Page 39 Connection setting. Set up TCP/IP address and port: Connect / disconnect to OM2000A+:...
  • Page 40 View last 20 PA faults: Anennas Settings: Screen selections: Minimal view: NOTE: To return to the normal view from the minimal view just right click with your mouse...
  • Page 41 Normal view: Advanced view: Fine tune screen: It is possible to retune the PA TUNE and LOAD remotely (See page 29).

  • Page 42: Remote Control Using Own Public Ip Address

    7.5. Remote Control using own public IP address: 7.5.1 Changing OM2000A+ connection settings Connect the LAN connector on the OM2000A+ to your local Internet with ethernet cable. Open up a WEB browser and enter the OM2000A+ current IP address (default is 192.168.1.211). An authentication window will show up.

  • Page 43: Setting Up In The Remote Software

    When completely finished, click Apply Settings in the main Menu. 7.5.2 Setting up in the Remote software In the Remote Control software open the Manager Settings and enter the IP Address and Port number that you set in point 7.5.1. Type of supported TCVR and working Press enter, when done.

  • Page 44: Remote Control Without Own Ip Address, Behind A Router

    7.5.3 Remote Control without own IP Address, behind a router If you need to change the OM2000A+ connection settings for some reason, use point 7.5.1 above. Change router´s settings Open up a WEB browser and enter the router´s internal Address usually 192.168.1.1) Type of supported TCVR and working...

  • Page 45: Om2000A+ Firmware Upgrade

    OM2000A+ firmware upgrade Download the firmware upgade software and latest firmware file for the OM2000A+ from the official OM Power website http://www.om-power.com/downloads. Store it to OM2000A folder created on your PC. NOTE: Use a serial null modem cable and connect the TCVR port on the OM2000A+ rear panel...
  • Page 46 Open folder OM2000A on your PC, find the MX460L.exe file and run it. Type of supported TCVR and working frequency are visible on the display. AUTO LED is ON. Select SETTINGS and choose the COM port you want to use. Baud rate should be 115200.
  • Page 47 Switch ON the power amplifier using the front panel green ON switch. Press SETTINGS to enter the Type of supported TCVR and SETTINGS Menu. working frequency are visible on the display. AUTO LED is ON. Choose INFO and press SHOW. Type of supported TCVR and working frequency are visible on the...
  • Page 48 Press the SEND TO LINE button. Type of supported TCVR and working frequency are visible on the display. AUTO LED is ON. Press LOAD on the OM2000A+ to start loading. Type of supported TCVR and working frequency are visible on the display.

  • Page 49: Icom Connection With Om2000A

    7.7. ICOM connection with OM2000A+...

  • Page 50: Yaesu Plus Bpf Plus Ant Switch Connection With Om2000A

    7.8. Yaesu plus BPF plus ANT Switch connection with OM2000A+...

  • Page 51: Control Panel Connectors Pin-Out

    7.9. Control panel (rear side) connectors pin-out TCVR connector DB 9 male RS232 connection with TCVR. For CAT communication connect pin 2 RX-D, pin 3 TX-D and pin 5 GROUND CI-V connector Use CI-V connection for communication with ICOM type transceiver.
  • Page 52 PC connector DB 9 female RS232 connection to the computer. For CAT communication connect pin 2 TX-D, pin 3 RX-D and pin 5 GROUND KEY IN – RCA connector Input signal PTT switching voltage / current 5V /2mA) KEY OUT – RCA connector Output signal PTT (maximum switching of 30V / 50mA) LAN connector Use for connection to the LAN or WAN network.
  • Page 53 CONTROL connector D-sub 15 female - GROUND - KEY OUT - ouput signal PTT ( maximum switching of 30V / 50mA - KEY IN input signal PTT – switching voltage / current 5V / 2mA - CI-V CI-V input for Icom CAT. The same as CI-V jack connector - BAND data A input - input BCD Yaesu compatibile code from TCVR - bit 0 - BAND data B input - input BCD Yaesu compatibile code from TCVR - bit 1 - BAND data C input - input BCD Yaesu compatibile code from TCVR - bit 2...
  • Page 54 9 - BAND data A - output BCD Yaesu BAND data compatibile code.Use for automatic bandpass filter OM6BPF 10 - BAND data B - output BCD Yaesu BAND data compatibile code.Use for automatic bandpass filter OM6BPF 11 - BAND data C - output BCD Yaesu BAND data compatibile code.Use for automatic bandpass filter OM6BP 12 - BAND data D - output BCD Yaesu BAND data compatibile code.Use for automatic bandpass filter OM6BPF...

  • Page 55: Block Diagram Of The Om2000A+ Power Amplifier

    7.10. Block Diagram of the OM2000A+ Power Amplifier...

  • Page 56: Troubleshooting

    7.11 Troubleshooting The OM2000A+ power amplifier contains several protection circuits, which constantly monitor operation of the Amplifier. When the firmware defined parameters exceed defined operating levels, a WARNING appears in the LAST EVENTS window of the PA front panel. If some parameters exceed a defined critical level, a FAULT is activated and the PA will automatically switch to STBY mode.
  • Page 57 High voltage supply fault. Check the fuses on HV Plate voltage error Check plate power supply board. Low voltage on the grid. Check fuse F4 on SW ON Grid voltage is low Check grid power supply board. Check fuse F5 on HV supply board and fuse F1 on the Screen voltage error Check screen power supply Screen board.
  • Page 58 Factory reset: In the case of very abnormal behavior of the OM2000A+ it is possible to do a factory reset. This will reset all the amplifier parameters back to the factory default values. Press and hold the ON/OFF button and press the green Main power switch for several seconds until the following display appears.

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