OM POWER OM2000A+ Manuel utilisateur

MADE IN SLOVAKIA

WWW.OM-POWER.COM

OM Power, s.r.o. 93030 Báč126,

SLOVAKI A

Co n t a ct : + 4 2 1 905 321 410

e-mail : om-power@om-power.com

e-mail : om-power@om-

power.com

OM2000A+

SHORTWAVE PLUS 50 MHz

POWER AMPLIFIER

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. HF Compartment …………………………………………………………………. 7

3.2. Power Supply …………………………………………………………………. 8

3.3. Safety Devices …………………………………………………………………. 8

4. INSTALLATION ………………………………………………………. 9

4.1. Grounding …………………………..…………………………. 10

4.2. Coaxial Cable ………………………………………………………. 10

4.3. Control Cable ………………………………………………………. 11

4.4. Cooling ………………………………………………………. 11

5. OPERATION …………….…………………………………………………. 12

5.1. OM2000A+ Front Panel ………………………………………..……. 12

5.2. OM2000A+ Control ……………………………………………………… 13

5.3. Preparing for operation ……………………………………………….… 21

5.4. Operation mode ……………………………………………………. 27

6. MAINTENANCE ……………………………………………………. 31

6.1. Indication of Fault Conditions ………………………………………… 31

6.2. Fuse Replacement ……………………..……………………………. 33

6.3. Tube Replacement ……………………………………………………. 33

6.4. Cleaning ……………………………………………………. 33

7. APPENDIX ……………………………………………………………. 33

7.1. Primary AC selection …………………………..………………………. 33

7.2. Removing the HV Transformer ………………………………………….. 35

7.3. Controlling OM200A+ with FLEX Radio Series 6xxx …..…………………. 36

7.4. OM2000A+ Remote Control ………………………………………………. 38

7.5. Remote Control using own public IP Address ........................................ 42

7.5.1. Changing OM2000A+ connection settings ............................................ 42

7.5.2. Setting up in the Remote software .......................................................... 43

7.5.3. Remote Control without own IP Address, behind a router ..................... 44

7.6. OM2000A+ firmware upgrade …………………………………………….. 45

7.7. Icom connection with OM2000A+ ………………………………………… 49

7.8. Yaesu plus BPF plus ANT Switch connection with OM2000A+ ….……. 50

7.9. Control panel connectors pin-out …………………………………………… 51

7.10. Block Diagram of the OM2000A+ Power Amplifier ………..…………… 55

7.11. Troubleshooting ………………………………………………………………. 56

FCC ID: X8NX8NOM2000 for US Market

1. GENERAL INFORMATION

1.1. Introduction

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 – 29.7 MHz including WARC + 50 MHz

Power Output 2000+ W in SSB/CW on HF bands, 1500 W in CW/SSB on 6m

1500 W in RTTY,

1500W PEP for US models

Input Power Usually 40 to 60W for full Output Power

Input Impedance 50 Ohm, VSWR < 1.5 : 1

Power Gain 15 dB

Output Impedance 50 Ohm unbalanced

Maximum Output SWR 3 : 1

SWR protection Automatic switching to STBY, when reflected power

is 350W or higher

Intermodulation distortion 32dB below nominal output

Suppression of harmonics < -50 dBc; <-70dBc on 50 MHz

Tubes FU-728F Ceramic tetrode

Cooler Centrifugal blower + Axial blower

Power supply switchable 220, 230, 240 V 50 Hz (230, 240, 250V 60 Hz for US

models)

Transformers One toroidal transformer 3kVA

Dimensions 390 x 195 x 370 (width x height x depth in mm), 15.3” x 7.7”x 14.5”.

Weight 24 kg (53 lb)

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. Features

The manufacturer implemented some of the company’s newest development results with most

wanted operating and safety features into this new model:

•High level of protection

•Memory for faults and warnings, easy maintenance

•Automatic set-up anode current (BIAS) – no need to adjust manually after changing the

tube

•Three programmable working modes of the centrifugal blower ( turbine ) + axial blower

•Full QSK with silent relay

•Many operational parameters to display

•Easy transport due to detachable HV transformer

•The smallest and lightest 2000 W Power Amplifier on the market

1.2.4. The Advantages of OM2000A+

•Full compatibility with: ICOM, ELECRAFT, KENWOOD, TEN-TEC ORION, YAESU,

Icom transceive protocol using by MicroHAM devices ( CI-V output ), FLEX Radios

and Anan

•RF sensitive Band and Frequency switching, for use with radios which do not

have CAT. We recommend using CAT and BAND DATA information due to the

much faster band changing whenever possible.

•Automatic switching between bands. Automatic tuning within the band according to

segments.

•Automatic switching of Band Pass Filter – BAND DATA output compatible with YAESU

radios (BCD code).

•Automatic switching of Antenna switches. The maximum number of antennas is 10,

controlled by BCD output code.

•Remote control via available PC Application.

•http://www.om-power.com/download/HF PA_Manager_

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 THE FOLLOWING SAFETY 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. DO NOT ATTEMPT TO SHORT OR

BYPASS safety switch under upper lid!

The OM2000A+ amplifier should not be used in a WET or HUMID environment or 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 removing the upper lid of the amplifier make sure that power supply has been

disconnected AT LEAST 10 minutes allowing for the electrolytic capacitors to discharge fully.

Disconnect power cord from the outlet!

Any work inside the PA (internal fuses replacement, tube replacement, etc.) should be carried

out only by aprofessionally qualified person!

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. 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. Fallow 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!

3. GENERAL DESCRIPTION

3.1. HF Compartment

his amplifier is using a ceramic tetrode FU-728F in a grounded-cathode circuit (input into

control grids). The OM2000A+ amplifier achieves excellent linearity by the voltage stabilization of

the control grid bias and the screen voltage. The power input is fed to the control grids, 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.

The output of the amplifier is a Pi-L circuit. The ceramic capacitors for TUNE and LOAD are seperate.

This enables the amplifier to be tuned exactly and makes it possible to easily return to the previously

set positions after band changes.

Top view on the opened OM2000A+

Tetrode FU728F Blower Power Supply Board Switch-ON Board

Output Pi-L Circuit Tuning Capacitor Front Subpanel HV

transformer

3.2. Power Supply

This Power amplifier uses 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).

The separate screen grid supply is regulated and stabilized with MOSFET circuits and delivers abt.

330V DC at 100mA. Control grid voltage is also stabilized (-120V DC). Change of stabilized first grid

voltage is controlled by the software (EBS for example).

The transformer primary is Tap adjustable for 220, 230, 240 V AC, 50 Hz. The factory setting is

230 VAC (230, 240, 250V AC, 60 Hz for US models, factory setting is 240 V AC.

If the AC voltage in your network is 220 or 240 Volts (230 or 250 Volts for US models), you

need to set the correct transformer tap before first starting the PA. See part 7.1.for more information.

Other primary voltage is possible on request (for example 200V 50/60 Hz for Japan).

3.3. Safety Devices

Control and monitoring circuits ensure control and safety during malfunctions of the PA. These are

placed on the Control board, which is located on the chassis subpanel.

One of the important safety elements is a mechanical

switch for AC blocking an opened amplifier.

4. INSTALLATION

Read this chapter carefully prior to starting installation. Before unpacking inspect shipping

carton for any damage. Keep all of packing parts for possible future shipment. Check

unpacked power amplifier. If you find any damage, contact your dealer immediately to keep

full warranty.

Type of supported TCVR and working

frequency are visible on the display.

AUTO LED is ON.

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. With poor

grounding, you may risk damaging your equipment, have problems with TVI/BCI or possible distortion

of your transmitted signal.

4.2. Coaxial Cable

The output of the transceiver is to be connected to the input of the amplifier via RG58 or similar 50

Ohm cable. For the connection between the power amplifier and the antenna, RG213 or similar coaxial

cable suited for high power is recommended. SO-239 sockets with Teflon insulation are used for the

HF INPUT and OUTPUT connectors.

Rier view of the amplifier OM2000A+

Fuses Mains Plug HF Output

Blower Grounding point Control HF Input

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