MADE IN SLOVAKIA OM4001A SHORTWAVE 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.
TABLE OF CONTENTS 1. GENERAL INFORMATION .................................................................... 4 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 OM4001A ……………………………………..… 5 2. SAFETY INSTRUCTIONS …………………………………………………..…. 6 3.
6.3. Tube Replacement ……………………………………….……………. 33 6.4. Cleaning ………………………………………………..……. 33 ………………………………………………………. 33 7. APPENDIX 7.1. Primary AC selection …………………………………………….…..……. 33 7.2. Controlling OM4001A with FLEX Radio Series 6xxx …………….…. 34 7.3. OM4001A Remote Control ……………..…………………………..………. 37 7.4. Remote Control using own public IP Address ............................ 40 7.4.1. Changing OM4001A+ connection settings ......................... 40 7.4.2.
GENERAL INFORMATION 1.1. Introduction T he OM Power model OM4001A is designed for all short wave amateur bands from 1.8 to 29.7 MHz (including WARC bands) and all modes. It is equipped with a two ceramic tetrodes FU-728F. 1.2. Specification 1.2.1. Parameters Frequency Coverage Amateur Bands 1.8 – 29.7 MHz including WARC Power Output 1500+ W in SSB/CW on HF bands 1500 W in RTTY and DIGI modes Input Power Usually 50 to 70W for full Output Power Input Impedance 50 Ohm, VSWR < 1.
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 Screen current too high Screen voltage error Grid current too high Grid voltage error Heating voltage error Mistuning of PA Temperature too high Soft start for fuse protection “switch-on blocking “ at opened amplifier 1.2.3.
2.
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. The amplifier is an A category product.
Top view on the opened OM4001A Tetrode FU728F Output Pi-L Circuit Blower Tuning Capacitor Switch-ON Board Front Subpanel Power Supply Board 8
3.2. Power Supply This Power amplifier uses two 3 KVA toroidal transformer. A soft start is provided using relays and resistors (placed on the switch-ON board). The high voltage is made by combining 8 x 420 V (total 3360V) @ 2.5A . 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.
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 mm2 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.
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. During transmitting the middle pin is connected to the ground. The relays of the OM4001A have to be switched earlier than HF is applied (cold switching). Modern transceivers they have a time delay between PTT switching and power output.
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. Especially when amplifier is moved from a cold place to a warm one as condensation may develop. This condition could result in damage to the high voltage circuits.
ON/OFF - Long press - (1 sec.) switch the PA ON (tube heating first), (2 seconds) switch the PA OFF. Always use the ON/OFF button as this allows for a predetermined (software controlled) time to cool down the tube and the inside of the PA compartment. 5.2. OM4001A control Turn ON the green Main Power switch and the home screen will lights up. Initial control touch buttons are visible on the bottom line.
Type of supported TCVR and working frequency are visible on the The information screen alsoTCVR provides Type of supported and display. an overview of the last 20 warnings working and faults: frequency are visible on the AUTO LEDdisplay. is ON. Press FAULTS. AUTO LED is ON. Press EXIT toofgosupported back to TCVR the home Type and screen. working frequency are visible on the display. AUTO LED is ON. Now press This display TypeSETTINGS.
Screen shows settings possibilities for CAT, ANTENNA, DISPLAY, TCVR NETWORK Type of supported and SETTING, EBS, BLOWER and other INFO. working Scroll to CAT SETTINGS (up orondown) frequency are visible the and display. press SET. AUTO LED is ON. Select your TCVR family Select appropriate bit rate Type of supported TCVR and then press SAVE. working frequency are visible on the If your TCVR is not equipped display. with CAT than select NO CAT and press SAVE. AUTO LED is ON.
Press ANTENNA SETTINGS. First select ANTENNA SWITCH (No switch, Standard). Useofleft or rightTCVR arrows. Type supported andIf you select some switch, 10 working ports for different antennas displays. Generally frequency visibleinonevery the all of antennas areare allowed display. band (green squares). To disable some square select port (up/down), touch SET for antenna name and then select AUTO band (left/right). Press SET.LED is ON. Four types of antennas for four different bands were disabled.
Press SET setting your callsign. Typefor of supported TCVR and Keyboard will be displayed forworking typing. frequency are visible on the display. AUTO LED is ON. of supported TCVR and Type yourType callsign and press ENT. working frequency are visible on the display. AUTO LED is ON. Use next lines and set brightness, sound TCVR and working volumeType and of barsupported graph style (use up/down and left/right). frequency are visible on the display. Confirm with SAVE. AUTO LED is ON.
Press NETWORK SETTING and then of supported TCVR and working press Type ENTER. frequency are visible on the display. AUTO LED is ON. Here the user has the option to set IP Address, Default Type ofNetwork supportedmask, TCVR and working gateway, Port number. frequency are visible on the display. User can enable or disable IP LED is ON. parameter setting via LANAUTO connection. Next lines are for EBS (Electronic Bias Setting) ON/OFF and for EBS level selection.
EBS level means level of the Input power where EBS starts working. Default EBS value is 0.1 W. We recommend turning EBS ON. A significant feature of using EBS is PA operating temperature reduction. NOTE: If you are not using compression in your TCVR, or you are not speaking loud enough, some syllables can be cut off. In such a case you should turn OFF the EBS. The next two settings allow Type of supported TCVR and deletion of the manual user working settings of the amplifier tunings for frequency arebands.
The INFOType settings allows viewing of supported TCVR and all of the previous working PA INFORMATION screen plus the visible addition offrequency one moreare touch keyontothe enter the UPGRADE mode. display. AUTO LED is ON. UPGRADEType touch button should of supported TCVR and ONLY be used if the EEPROM or working firmware files (or both) will be on the upgraded.frequency In such a are casevisible see page display. 45. AUTO LED is ON. 5.3.
The “Tube Heating Timer” is visible on the Wait TCVR untilandthe Typedisplay. of supported working required 180 seconds is complete on thein display. before frequency placing are thevisible amplifier OPERATE Mode. AUTO LED is ON. After heating is completed, the PA will light theType STBYofmode indicator and this supported TCVR and working Main display will appear. frequency are visible on the display. NOTE: If CAT or ANTENNA settings are populated the associated windows will reflect these settings.
The Menu display allows the user to go Type of supported TCVR and working deeper into the SETTINGS mode, MEASuring mode or mode. frequency areSERVICE visible on the display. AUTO LED is ON. Press SETTING button. Type of supported TCVR and working frequency are visible on the display. AUTO LED is ON. We areType in theofsettings mode again, supported TCVR and but working with a new submenu called INFO. frequency are visible on the display. Scroll to INFO and press SHOW. AUTO LED is ON.
Type ofissupported TCVR and working A new button visible – SET Umain. Press it. frequency are visible on the display. AUTO LED is ON. Type in the actual setting of the primary of supported voltageType tap and press ENT.TCVR and working frequency onthe theMenu display. Press EXIT twice toare govisible back to display. AUTO LED is ON. This is the actual physical setting of the primary voltage tap.
Three different bar graphs can be defined TypeBARG2 of supported TCVR and working using BARG1, or BARG3 buttons. frequency are visible on the display. Press BARG1. AUTO LED is ON. Green graph may show one of the user selectable 8 monitored parameters. Select Type of supported TCVR and working the wanted parameter from the list at the bottom of the screen press frequency areand visible onSAVE. the display. NOTE: Follow these steps to populate BARG2 and BARG3 as desired. AUTO LED is ON.
Now we are in the SERVICE settings mode. Type of supported working Scroll to selected line andTCVR pressand SHOW or SET (depending onare thevisible line). on the display. frequency AUTO LED is ON. Type of supported TCVR and working We selected last 20 FAULTS to show. frequency are visible on the display. Press EXIT AUTO LED is ON. of supported TCVR and working Go toType SET EBS1 AUTO and press SET. are visible on the on display. PA willfrequency automatically set 20mA the front and back tube separately.
Similar ways EBS2 can be preprogrammed (300mA by AUTO set). Or another value of EBS2 by MANUAL setting. Do not forget to adjust the same values for both tubes. Scroll to CALIBRATION Ip, IsTCVR andand press Type of supported working SET. Calibration will be done frequency are visible on the display. automatically. AUTO LED is ON. Scroll to SWR PROTECT and press SET.
We are now in OPERATE mode. Type ofindicator supported and working Note the light onTCVR the touch Screen has changed to OPERATE . frequency are visible on the display. Press MENU. AUTO LED is ON. Now try to press PTT (foot switch for example). Type of supported TCVR and working We are now in TRANSMIT mode are visible on the display. (withoutfrequency RF). Note the new TRANSMIT light indicator on the touch screen. AUTO LED is ON. We also have a new M-TUNE button here.
Press SAVE for writing values to the Type of supported TCVR and working memory and press EXIT. frequency are visible on the display. NOTE: Repeat M-TUNE adjustment process for other segments / bands as required. AUTO LED is ON. Below is an example of an M-TUNE situation. First we will check driving power from the transceiver. Stay in STBY mode, press PTT and apply RF power. Measured driving power is 30 Watts. Type of supported TCVR and working frequency are visible on the display.
Press MENU, M-TUNE) and make the manualType adjustment. of supported TCVR and working This isfrequency the result after onmanual are visible the display. adjustment process. Screen current is now abt. +30 mA. AUTO LED is ON. These parameters were SAVED. NOTE: The OM4001A is factory adjusted to a maximum output power of 1500W into a 50 Ohm load. unique Tuning table, with TUNE and LOAD values for every band, is supplied with each PA.
• If the Screen current is lower than 0 mA (negative value), change it by pressing the LOAD button until 0 mA is set and check again for maximum output power. Do not start with very low input power, set abt. 50% before beginning M-tune process. • If you reached the desired maximum output power, and the PA Screen current is inside 0 / +40mA , then press the SAVE button. Notice 1: If the tuning process takes more than 1 minute, allow for a short break to prevent temperature overloading of the PA.
Grid current is high Screen current error Heating voltage error HARD FAULT Plate voltage error Grid voltage is low Screen voltage error SWR is too high Amplifier is too hot Most of the safety circuits are preset for two levels of activation. The first level is a warning level. In such a case a warning message appears on the display but the power amplifier will stay in normal operation. See the table above for warning and fault conditions. screen.
If you touch the yellow “last events” box on the PA touch screen Type of supported TCVRdetails. and working it will display the warning frequency the display. In the case are of visible some on hardware failure or if your power amplifier is not working properly, please contact the manufacturer orLED your AUTO is ON. local dealer. 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: 6.2. OM POWER, s.r.
6.3. Tube Replacement In the case of a damaged vacuum tube , contact the manufacturer or your dealer for ordering a new one. We will provide instructuions for replacing the tube. Replacement should be done by a professionally qualified person! After tube replacement the automatic BIAS adjustment procedure must be done. 6.4. Cleaning To prevent damage to the amplifier surface and plastic components, do not use aggressive chemicals for cleaning. Do not open the amplifier for cleaning.
Remove the upper lid first. On the right side of the PA, there are two PCBs mounted. On the right upper side is Switch ON board where AC selector is located. There are AC selector for each transformer. The blue wire – one side of primary winding is conected to N pole. Wire marked with proper voltage connect to L pole. Type of supported TCVR and working AC voltage is marked at every black terminals.frequency are visible on the display. AUTO LED is ON.
You must assign this serial port to the TX slice that is associated with the Flex 6XXX. otherwise the amplifier will not set on the proper frequency. In the CAT SETTINGS menu select FLEXRADIO, baud rate 9600 and press SAVE NOTE: Type If youofhave alreadyTCVR configured other supported and working programs to communicate with the Flex frequency are visible thethen display. 6XXX using a different baud on rate set the same baud rate for the Amplifier CAT setting. AUTO LED is ON.
Activate Smart SDR and from the Flex SSDR main screen choose Settings then USB Cables Now connect the USB-FTDI adapter to a USB port on the Flex radio. A new line showing the connected USB adapter will appear. Double click on the new usb adapter line to open the configuration window for this COM port . Set all parameters in the configuration window according to the picture below. Check that ENABLED is selected in both associated USB windows. Close both windows.
7.3. OM4001A Remote Control The OM Power team has developed special software which allows controlling the PA OM4001A remotely. Download it from the official OM Power website http://www.om-power.com/downloads.
Connect / disconnect to OM4001A: View last 20 PA faults: Anennas Settings: 38
Screen selections: Minimal view: NOTE: To return to the normal view from the minimal view just right click with your mouse Normal view: Advanced view: Fine tune screen: It is possible to retune the PA TUNE and LOAD remotely (See page 31).
7.4. Remote Control using own public IP address: 7.4.1 Changing OM4001A connection settings Connect the LAN connector on the OM4001A to your local Internet with ethernet cable. 192.168.1.222). Open up Type a WEB andTCVR enter theworking ofbrowser supported and OM4001A current IP address (default is frequency are visible on the display. An authentication window will show up. Leave the fields empty and click OK. AUTO LED is ON.
When completely finished, click Apply Settings in the main Menu. 7.4.2 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. Now you are frequency are visible on the display. ready to work with the OM4001A over the internet. AUTO LED is ON.
7.4.3 Remote Control without own IP Address, behind a router If you need to change the OM4001A connection settings for some reason, use point 7.5.1 above. Change router´s settings Open up a WEB browser and enter the routers´s internal IP Address ( usually 192.168.1.1) Type of supported TCVR and working frequency are visible on the display. An authentication window WILL APPEAR. You need to enter the routers login and password. Usualy a router´s default login is AUTO LED is ON.
Now you are ready to work with OM4001A over the internet. In the Remote Control software, open the Manager Settings. Enter the IP Address and Port number you set up previously in your router. IP Address is the WAN IP Address from the basic Type supported TCVRisand setup page andofthe Port number the working Port (or Public Port if separate) from the port forwarding page. frequency are visible on the display. AUTO LED is ON. 7.5.
Open folder OM4001A 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 type of connection: Select SERIAL and choose the COM port you want to use. Baud rate should be 115200 or choose LAN and Type of supported TCVR and write up PA IP address. working Push OK button. frequency are visible on the display. AUTO LED is ON. Select the Firmware tab and click on the LOAD BIN button. Choose OM4001A Vxxx.
Switch ON the power amplifier using the front panel green ON switch. Type of supported TCVR working Press SETTINGS to enter theand SETTINGS Menu. 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 display. AUTO LED is ON. Press UPGRADE to start the Amplifier upgrade process.. Type of supported TCVR and working frequency are visible on the display. When you see this screen on the PA, select AUTO LED is ON.
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 OM4001A to start loading. Type of supported TCVR and working frequency are visible on the display. You can see the loadingAUTO progress the bar LED on is ON. graph Type of supported TCVR and working frequency are visible on the display. You will see this screen after the firmware AUTO LED is ON.
ANT2 ANT1 TRX ICOM GND SEND REMOTE AC 2 AC 1 F2 F1 ANT & BPF KEY IN OUT LAN CONTROL CI-V PC TCVR OUTPUT to ANT INPUT COM port RS 232 REAR VIEW OM4001A PC 7.6.
ANT2 CAT ANT1 BAND DATA FT1000MP / FT9000 TX GND GND AC 2 RS 232 SEND AC 1 F2 F1 LAN Bandpass filter OUTPUT OM6BPF ANT & BPF CONTROL INPUT CI-V KEY IN OUT PC TCVR OUTPUT ANT switch ANT INPUT REAR VIEW OM4001A COM port RS 232 BCD decoder PC 7.7.
7.8. 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. Signal CI-V is connected to the Tip.
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.
CONTROL connector D-sub 15 female Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 9 Pin 10 3,5mm Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 - 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.
Pin 9 - BAND data A - output BCD Yaesu BAND data compatibile code.Use for automatic bandpass filter OM6BPF Pin 10 OM6BPF Pin 11 OM6BP Pin 12 OM6BPF Pin 13 Pin 14 Pin 15 - BAND data B - output BCD Yaesu BAND data compatibile code.Use for automatic bandpass filter - BAND data C - output BCD Yaesu BAND data compatibile code.Use for automatic bandpass filter - BAND data D - output BCD Yaesu BAND data compatibile code.
AC 2 AC 1 1 INPUT 2 2 1 1 J6 J1 J11 Temp Bias J12 2 56 5 K1 TR1 J5 J8 TR2 J2 AC24V HV supply Supply K2 1 2 2 1 56 5 4 1 2 2 7 3 1 2 X2 FU728f Blower Ext.bl.
7.10 Troubleshooting The OM4001A 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. The LAST EVENTS window will then display the fault information will appear.
Check plate power supply High voltage supply fault. Check the fuses on HV board. Grid voltage is low Check grid power supply Screen voltage error Check screen power supply Amplifier is too hot Check cooling system Set up additional blower HARD FAULT Check HV circuits and Tube Heating voltage error Set up proper transformer voltage selector Low voltage on the grid. Check fuse F9 on HV supply board. Check fuse F10 on HV supply board and fuse F1 on the Screen board.
After the FACTORY RESET completes the PA is ready for operation. Type of supported TCVR and working frequency are visible on the display. AUTO LED is ON. Important notice: Perform a Factory Reset only if absolutely necessary to clear abnormal behavior, because personalized settings, mainly CAT communication with TCVR, antenna switch settings and any USER settings must be re-input.
