GENERAL INFORMATION 1.1. Introduction The OM Power model OM1006 is a single band, solid state amplifier, designed for duty operation on 6 meter’s amateur band with all modes and no time limit. It is equipped with a new Freescale high rugged N-channel double MOSFET. This amplifier is characterized by compact design, small size and a low weight.
WARNING! Never turn the amplifier on without the upper lid in place. WARNING! The OM1006 amplifier should not be used in WET or HUMID environment or exposed to RAINFALL!
GENERAL DESCRIPTION 3.1. HF part OM1006 power amplifier was designed to achieve the RF performance of the MOSFET, when applied to the 50 – 54 MHz frequency band. Design was tuned for performance at 1000W CW output, 50VDC. It consists of „no tune“ distributed element matching circuits designed to be as small as possible.
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Top view on the opened OM1006 HF Board Output LPF Input / Output Relay Supply Board for Control circuits Switch Mode Power Supply...
3.2. Power Supply The amplifier uses two power supplies. A professional switch mode power supply 50V / 32A for power amplifier, and small 12V power supply for logic and protection circuits. Main power supply contains special soft start circuits, uses two fans, which are visible from the rear side of PA.
INSTALLATION NOTE Read this chapter carefully prior starting with installation. Before unpacking inspect shipping carton first, if it is not damaged. Keep all of packing parts for possible future shipment. Check unpacked power amplifier. If you find some damaging, contact your dealer immediately to keep full warranty.
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Rear view of the amplifier OM1006 RF Output RF Input AC Power Socket PS Fans - Local Area Network connection for REMOTE CONTROL of PA (for future use) PREAMP - RCA Phono, +12V / 100mA for an external RX preamplifier switching...
4.4. Main Supply 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.
CAUTION Never try to change antenna during a transmission to avoid warranty loss. 5.1. Operation Elements There is couple of operational elements accessible or visible on the front panel. STBY - Standby mode LED OPERATE - Operation mode LED - CW mode LED PREAMP - Preamplifier „ON“...
OPER - short press to switch between Standby and Operation mode long press (about 2,5 seconds) to enter the Settings menu (green LED is ON) short press to release the Settings menu (green LED is OFF) short press to confirm parameters in the Settings menu short press to move cursor to the right in editing mode long press to release editing mode and confirms Own text - short press to switch preamplifier ON and OFF...
5.2.2. Settings Menu Press SET button for about 2,5 seconds to enter Settings menu. Green LED in the button’s corner will light. The top line will display „Settings menu“, in the bottom line user can scroll these parameters or texts: Own text –...
5.2.2.1. Own text editing „Settings menu“ appears in the upper line. Select „Own text“ in the bottom line. To open editing mode press PRE. Cursor will appear in the first position. You can move it to the right using SET, or to the left using PRE.
5.2.2.3. Bias delay Electronic Bias Settings (EBS) is one of significant feature of the power amplifier. It allows to set low drain current after pressing the PTT regardless of whether you have CW or SSB mode, until RF signal is no present at the input. At the moment when RF signal comes to the input of PA, bias will automatically change its value depending on the selected operation mode.
5.2.2.5. Bias SSB No.1 This parameter will be checked without the possibility to change it. When „Settings menu“ appears in the upper line, select „Bias SSB No.1“ in the bottom line. To view SSB Bias press PRE. In couple of seconds you will see the value of drain current in the second line (about 2,7A).
5.2.2.7. Software version The last thing you can view in the Settings menu, is Software version, visible in the second line of the display. NOTE Do not forget to leave Settings menu by pressing the SET button. Green LED in the button’s corner turns OFF.
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WARNING! Before you push PTT for the first time, set the RF power in your transceiver to the minimum (from 1 to 3 watts) !!! Select parameters in the Display menu as is visible in the previous or next picture and press PTT.
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Previous picture shows input power 0.8W, output power 173W. Power gain from input to output of the PA was 23,5 dB. When operation mode of the PA was changed from CW to SSB, output power increased (TCVR output power remained the same). This is because the operation class of PA was changed from class C to class AB.
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Previous pictures show couple of different kinds of visual display during the same test. This test gave us result of power gain 25,3 dB in class AB. If all looks good, you can increase RF power from the transceiver slowly and check important parameters of PA.
If a fault condition appears during the operation of the amplifier, the safety circuits of OM1006 will react, the FAULT LED lights. There are several fault or warning messages possible to appear on the display, when some of the protection will be activated. The OM1006 power amplifier can show one of the following messages: „PowerOut is too high”...
Before opening the upper lid of the amplifier make sure that power supply has been disconnected. Take out power cord from the outlet! OM1006 uses one fuse 10 Amps „T” type 5 x 20 mm for main 50V DC power supply and one fuse 500mA „T“ type for small 12V DC power supply.
6.3. Cleaning To prevent damage to the amplifier surfaces and the 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 moistened with clean water or window cleaner.