Exhibit 6: User’s Manual External Radio Frequency Power Amplifier OM2000A+ Model 2000A+ Array Solutions 2611 North Beltline Rd Total pages Suite 109 46 Sunnyvale, Texas 75182 USA Tel: 214 954 7140 fax: 214 954 7142 E-mail: info@arraysolutions.
Thank you for purchasing a new model of the power amplifier for the short waves plus 50 MHz amateur bands. You got a real automat with no knobs, no rotary switches on the front panel, just two small switches and one large display. Smart design, modern conception, high reliability is the result of our own development and many years of our experiences with overall solutions and especially with protection circuits. This product is covered by 2 years of warranty period except of the tube ( 1 year ).
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 OM2000A+ ………………………… 5 2. SAFETY INSTRUCTIONS ………………………………………………. 6 3. GENERAL DESCRIPTION …………………………………………………. 7 3.1.
1. GENERAL INFORMATION 1.1. Introduction T 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. 1.2. Specification 1.2.1. Parameters Frequency Coverage Amateur Bands 1.8 – 29.
1.2.2 Protection Circuits There are several protection circuits used in the amplifier. They are activated when one or more of next parameters exceed defined values or some unwanted occasion 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 to high Soft start for fuses protection “switch-on blocking “ at opened amplifier 1.2.2.
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 NEXT 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.
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 long time operation 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 OM2000A+ Tetrode FU728F Output Pi-L Circuit Blower Tuning Capacitor Power Supply Board Front Subpanel Switch-ON Board HV transformer 8
3.2. Power Supply Power amplifier is using one 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 4 x 575V AC (total 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).
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.
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 OM2000A+ have to be switched earlier than HF is applied (cold switching). Modern transceivers they have a time delay between PTT switching and power output.
We do not recommend to change antenna output during a transmission. When you decide to have a short operating break, place the amplifier to the standby mode rather than switch it off. 5.1. OM2000A+ Front Panel Front panel of the OM2000A+ is almost empty…There is only touch TFT display accessible plus two switches. ON - Main Switch. After turning ON small 12V APU for logic, protection circuits and the display will be activated. High voltage and RF circuits are still OFF.
5.2. OM2000A+ control Turn ON the Main switch and the home screen will lights up. In the bottom line touch buttons are visible Remember that the home screen is active for some information and settings , while PA is still OFF! BAND Touch the left side of BAND button to go down, touch the right site to go up with band displayed above the button. ANTENNA Transmitting antenna choice. Functional ONLY when the antenna switch is programmed and antennas are defined (see next parts).
