Exhibit 6 page 1 of 33 OM Power Exhibit 6: User’s Manual External Radio Frequency Power Amplifier OM2500A Model OM2500A Array Solutions 2611 North Beltline Rd Suite 109 Sunnyvale, Texas 75182 USA Tel: 214 954 7140 fax: 214 954 7142 E-mail: info@arraysolutions.
Exhibit 6 page 2 of 33 TABLE OF CONTENTS 1. GENERAL INFORMATION 1.1. Introduction ……………………………………………………………….. 4 1.2. Specification …………………………………………………………….... 4 1.2.1. Parameters …………………………………………………………………. 4 1.2.2. Protection Circuits ………………………………………………………… 4 1.2.3. Indicators ………………………………………………………………….. 5 2. SAFETY INSTRUCTIONS ……………………………………………… 6 3. GENERAL DESCRIPTION ………………………………………………. 7 3.1. HF part ……………………………………………………………………. 7 3.2. Power Supply ……………………………………………………………..
Exhibit 6 page 3 of 33 5.2.7. MUTE Option …………………………………………………………….. 18 5.2.8. LCD Settings Menu ………………………………………………………. 19 5.2.9. Operation in MANUAL Mode …………………………………………… 19 5.3. Tuning of Power Amplifier …………………………………………….. 20 5.3.1. Manual Tuning …………………………………………………………… 20 ……………………………………………………… 22 6. MAINTENANCE ………………………………………………………. 23 6.1. Indication of Fault Conditions …………………………………………. 23 6.2. Fuse Replacement …………………………………………………….... 24 6.3.
Exhibit 6 page 4 of 33 1. GENERAL INFORMATION 1.1. Introduction The OM Power model OM2500A is a fully automatic, full legal limit amplifier, designed for heavy duty use on all short wave amateur bands from 1.8 to 29.7 MHz (including WARC bands) and all modes with no time limit. It is equipped with one GU84b ceramic tetrode. THE ADVANTAGES OF OM2500 A Full compatibility with: ICOM, ELECRAFT ,KENWOOD, TEN-TEC ORION , Yaesu and CI-V data.
Exhibit 6 page 5 of 33 Screen current too high Grid current too high Mistuning of PA Hot switching protection Soft start for protecting your fuses “switch-on blocking “ at opened amplifier 1.2.3.
Exhibit 6 page 6 of 33 2.
Exhibit 6 page 7 of 33 3. GENERAL DESCRIPTION 3.1. HF part In this amplifier a tetrode GU 84b is used in a grounded-cathode circuit (input into control grid). This amplifier achieves excellent linearity by the voltage stabilization of the control grid bias and the screen voltage. The power input is given to the control grid, using a broadband input circuit with an input impedance of 50 Ohms. This adaptable input circuitry ensures a good input SWR (better than 1.5:1) on all amateur bands.
Exhibit 6 page 8 of 33 3.2. Power Supply Power supply of the amplifier is comprised of two of 2,0 kVA toroidal transformers. A soft start is provided using relays and resistors. The high anode voltage is made by combining 8 x 350 V (total 2800V) @ 2A. Each has its own rectifier and filter. In the high voltage circuit, safety resistors are employed to protect the amplifier against overload.
Exhibit 6 page 9 of 33 4.2. Coaxial Cable The output of the transceiver is to be connected to the input of the amplifier via RG58 or similar cable. For the connection between the power amplifier and the antenna, RG213 or similar coaxial cable suited for high power is recommended. Both the INPUT and OUTPUT SO-239 sockets with Teflon insulation is used. Rear view of the amplifier OM2500A MAINS Cable REMOTE 4.3.
Exhibit 6 page 10 of 33 KEY IN KEY OUT RCA Phono - Input signal PTT switching voltage / current 5V /2 mA) RCA Phono - Output signal PTT (maximum switching of 30V / 50mA) CI-V Mono 3.5mm Jack for connection of ICOM TCVRs or devices that provide compatible CI-V protocol. Correct baud rate is important. TCVR DB9 serial port RS232 for KENWOOD, YAESU and ELECRAFT TCVRs. Correct baud rate and type is required for successful operation. If both CI-V and TCVR cables are connected then CI-V disables RS232.
Exhibit 6 page 11 of 33 3. INHIBIT Control voltage 4. TX INHIBIT for Yaesu and Elecraft – this supersedes ALC output 5. NC 6. KEY OUT 7. NC 8. KEY IN 9. – 15. GND ANT & BPF SW 4.4. DB-25 is used for switching of external HP BPF or external Antenna Switch. Maximum switching of 30V / 0.5A is possible. PIN OUT: 1. antenna port 1 2. antenna port 2 3. antenna port 3 4. antenna port 4 5. antenna port 5 6. antenna port 6 7. antenna port 7 8. antenna port 8 9. antenna port 9 10. antenna port 10 11.
Exhibit 6 page 12 of 33 CAUTION Be sure you got PA with properly terminated line cable, corresponding with your power system’s outlet. If not, contact your dealer. In such a case you should make the necessary changes using a licensed electrician. WARNING! Be sure that your power system is correctly wired and properly rated! To use adequately sized and connected grounding system is also very important. 4.5.
Exhibit 6 page 13 of 33 5.1. Operation Elements There are couple of operational elements accessible or visible on the front panel. TUNE - Anode capacitor for tuning, tuning of higher frequencies to "0", lower frequencies to „100“. LOAD - Output capacitor tunes antenna load resistance to amplifier. Capacity is low at „100“ and high at "0" on the scale. OFF - You switch off the amplifier by pressing this button. ON - You switch on the amplifier by pressing this button.
Exhibit 6 page 14 of 33 INHIBIT Indicates interruption of transmission during the tuning process of the PA. If indicated by RED LED then PA is in STBY mode. If during a retune operations within same BAND then the PA will retune according to the frequency of the transceiver. When changing the BAND – INHIBIT will stay lit until the KEY IN is released and the tuning process will start. After that PA is automatically ready for operation.
Exhibit 6 page 15 of 33 Example of Automatic mode with ICOM TCVR. Type of supported TCVR and working frequency are visible on the display. AUTO LED is ON. 5.2.1. TCVR Support Settings Supported transceivers: ICOM, ELECRAFT, KENWOOD, TEN-TEC , ORION, YAESU Press SET button and scroll using UP / DWN to CHOOSE TCVR Confirm CHOOSE TCVR by pressing SET again and scroll UP / DWN to your transceiver type. Confirm the selection by pressing SET Continue by selecting Baud Rate.
Exhibit 6 page 16 of 33 When using Yaesu TCVR you need to configure the STOP BIT parameter correctly and confirm selection with SET. The communication settings menu can be left by pressing the AUTO button. The amplifier will enter AUTO mode only if all settings are correct and connection has been established with your transceiver. You can verify that the correct frequency and transceiver type is shown on the LCD display. 5.2.2.
Exhibit 6 page 17 of 33 5.2.4. Antenna Switching Menu If you have 3rd party external antenna switch connected to your amplifier ( i.e. MicroHAM TEN SWITCH), you need to configure the assignment of each port to a specific band /or antenna. By pressing SET and scrolling to ANTENNA SETTINGS and confirming by SET you get current band and its antenna selection. By scrolling UP / DWN you can select BAND which you want to assign to current ANTENNA selected.
Exhibit 6 page 18 of 33 5.2.6. Loading factory default settings In the rare case of needing to restore factory default settings press SET and scroll using UP / DWN to LOAD DEF VALUES and confirm by SET. Then select if you want to erase all settings (pressing TUNE) or just one setting value (SET button). In the case of resetting a single parameter use UP / DWN to select which option and confirm by SET. 5.2.7.
Exhibit 6 page 19 of 33 5.2.8. LCD Settings Menu By pressing SET and scrolling UP / DWN and selecting LCD CONTRAST (Confirming by SET) and pressing Up or DWN you can vary the Contrast of the LCD display. Press SET for confirm the setting. . 5.2.9. Operation in MANUAL mode To enter Manual mode of the PA please press MAN. By pressing MAN repeatedly you select BAND and band segment. You can control the segment or band by scrolling the UP / DWN buttons.
Exhibit 6 page 20 of 33 5.3. Tuning of Power Amplifier The OM2500A amplifier is operated in class AB. Thus it’s possible to obtain a maximum output power at excellent linearity. For this purpose the amplifier has to be tuned carefully.
Exhibit 6 page 21 of 33 OM2500A will tune automatically to either TCVR frequency via CAT interface or by frequency sampled by amplifier´s RF input. 4. Reduce the power output of your transceiver to the 0 5. Switch OPR/STBY to OPR position (OPR LED lights up) 6. Choose the TUNE position of multimeter 7. Transmit and increase driver power to 10W (OUTPUT power will be abt.
Exhibit 6 page 22 of 33 5.3.2. Tuning Adjustment OM2500A has been design to deliver maximum output power at 50 Ohms load. To deliver maximum output to a real load you need to adjust the tuning according to your real antenna impedance. Entering the TUNE mode is done by pressing the TUNE button. The OM2500A then switches the transceiver to RTTY and sets the frequency to corresponding segment. By changing the values of TUNE and LOAD capacitors we tune the PA as per manual tuning instructions.
Exhibit 6 page 23 of 33 6. 6.1. MAINTENANCE Indication of fault conditions OM2500A has the following indication LED on the front panel: GRID MIN GRID MAX HV IP FAULT OPR STBY WAIT - indication of first gird current - max.
Exhibit 6 page 24 of 33 In USA: Array Solutions 2611 North Belt Line Road Suite # 109 Sunnyvale, TX 75182 Tel: (214)954-7140 Email: sales@arraysolutions.com 6.2. Fuse Replacemeent 6.3. Tube Replacement 6.4. Cleaning To prevent damage of amplifier surfaces and plastic components do not use aggressive chemicals for cleaning. Do not open the amplifier for cleaning. Outer surface may be safely accomplished by using piece of soft cotton cloth moistured with clean water or window cleaner.
Exhibit 6 page 25 of 33 7. APPENDIX 7.1.
Exhibit 6 page 26 of 33 7.2.
Exhibit 6 page 27 of 33 7.3.
Exhibit 6 page 28 of 33 7.4.
Exhibit 6 page 29 of 33 7.5.
Exhibit 6 page 30 of 33 7.6.
Exhibit 6 page 31 of 33 7.7.
Exhibit 6 page 32 of 33 7.8.
Exhibit 6 page 33 of 33 7.9.
