OM POWER OM2002+ Bedienungsanleitung
2
Welcome to the solid state high power amplifier owners family! Thank you for purchasing a new model for the
2m amateur band. Parameters, the quality of design and functionality meet the requirements of the market and
are the result of our own development.
This product is covered by 3 years of warranty period. We wish you many years trouble-free use of this
equipment, lot of fun and successful connections in the world of amateur radio.
The OM POWER Team
Conventions used in this manual
DANGER / WARNING : Information to prevent injury to yourself when completing a task.
CAUTION: Information to prevent damage to the components when completing a task.
NOTE: Tips and additional information to help you complete a task
3
TABLE OF CONTENTS
1. GENERAL INFORMATION 6
1.1. Introduction 6
1.2. Specification 6
1.2.1. Parameters 6
1.2.2. Protection Circuits 8
2. SAFETY INSTRUCTIONS 9
3. GENERAL DESCRIPTION 11
3.1. Front and Rear Panel 11
3.2. HF Part 15
3.3. Power Supply 16
3.4. Safety Devices 18
4. INSTALLATION 19
4.1. Grounding 19
4.2. Coaxial Cable 20
4
4.3. Control Cable 20
4.4. Main Supply 21
4.5. Cooling 22
5. OPERATION 23
5.1. Operation Elements 24
5.2. Preparing for Use 25
5.3. Setup Menu 26
5.3.1. Language selection 27
5.3.2. Display contrast 27
5.3.3. Display delay 28
5.3.4. Bias switch 28
5.3.5. Preamplifier delay 29
5.3.6. Bias current 30
5.4. Operating Mode 31
6. MAINTENANCE 35
6.1. Fault conditions 35
5
6.2. Fuses 38
6.3. Cleaning 38
7. BLOCK DIAGRAM 39
8. TIMING 40
6
1. General Information
1.1. Introduction
The OM Power model OM2002+ is a single band, solid state amplifier, designed for duty operation on 2 meter’s
amateur band with all modes and no time limit. It is equipped with a Freescale high rugged N-channel double
MOSFETs. This amplifier is characterized by compact design, small size and a low weight.
1.2. Specification
1.2.1. Parameters
Frequency Coverage 144 –148 MHz Amateur Band
Power Output 1800W in CW
1500W in SSB (linearity), RTTY, AM, FM and digi modes,
50% duty cycle
Input Power 10 to 15 W for full output power 1800W
Input Impedance 50 Ohm, VSWR < 1.3 : 1
7
Power Gain Typically 20 dB
Output impedance 50 Ohm unbalanced
Maximum output SWR 1,9 : 1 for full output power 1800W
SWR protection: Automatic switching to STBY , when reflected power is
180W or higher
Intermodulation distortion - 32 dBc
Suppression of harmonics < -70 dBc
MOSFET 2 x MRFE6VP61K25HR6
Cooler 2 axial fans (cooler) + 1 axial fan (power supply)
Supplying 100 –250VAC , 50 –60 Hz
Power Supplies inside 50V DC switching mode PS
12V DC for logic and protection circuits
Size 318 mm x 144 mm x 362 mm [12.5” x 5.7” x 14.3”]
(Width x height x depth)
Weight 11.1 kg ( 24.4 lb )
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1.2.2. Protection Circuits
There is several special protection circuits used in the amplifier. They are activated when one or more of next
parameters exceed defined values or some unwanted occasion occurs.
Output power too high
Reflected power too high
Drain current too high
Differential drain current to high
Power coupler fault
VSWR too high
DC voltage too low or DC voltage error
Input power too high (hardware protection of input overdrive & software protection)
Inside temperature too high
Soft start for power supply protection (PS feature)
9
2. Safety Instructions
Before you will start to install and operate power amplifier, read carefully next safety instructions!
AVOID CHILDREN to play around PA or to touch power amplifier or connected cables in working
condition, or to push anything into the holes!
Never turn the amplifier on without the upper lid in place.
The OM2002+ amplifier is neither to be used in a WET or HUMID environment nor to be exposed to
RAINFALL!
Do not turn the amplifier on without having connected the ANTENNA or properly rated DUMMY
LOAD! A hazardous HF voltage may build up on the antenna connector after turning the amplifier
on with no antenna or dummy load connected!
Before opening the upper lid of the amplifier make sure that power supply has been disconnected.
Take out power cord from the outlet!
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The amplifier must be installed in such a way that free flow of hot air from inside is allowed. The
amplifier must not be installed in a constrained surrounding (i.e. tight shelves etc.)
The amplifier must be properly grounded during operation.
During operation the amplifier must be installed in such a way that the rear panel will stay
accessible.
The amplifier is an A category product. In a household it can influence other electric appliances. In
such cases the user is to take proper actions to mitigate this disturbance.
Read this manual carefully. Follow all of instructions during installation and operation to avoid
damage to the amplifier not covered by manufacturer’s warranty! Do not attempt to perform any
change of hardware or software!
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