OM POWER OM2000A+ Manuel utilisateur

MADE IN SLOVAKIA

OM Power, s.r.o. 93030 Báč126,

SLOVAKIA

Contact : +421 905 321 410

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

WWW.OM-POWER.COM

Instruction Manual

OM2000A+

SHORTWAVE PLUS 50 MHz

POWER AMPLIFIER

FCC ID: X8NOM2000A

Thank you for purchasing this new model of the OM Power’s RF power amplifiers line for HF and 50

MHz amateur radio bands. You now own, the OM2000A+, an automatic unit with no knobs, no rotary

switches on the front panel, just two small switches and one large touch display.

Smart design, modern conception, high reliability is the result of OM Power’s development and many

years of experience with overall solutions and special attention with the design of the protection circuits.

This product is covered by two years of warranty on the amplifier itself and one year for the tube.

We wish you will have many years of trouble-free use of this equipment, lots of fun and successful

contacts in the world of amateur radio.

The Array Solutions and

OM Power Team

TABLE OF CONTENTS

1. GENERAL INFORMATION ....................................................................................... 5

1.1. Introduction ………………………………………………………………. 5

1.2. Specification ………………………………………………………………. 5

1.2.1. Parameters …………………….…………………………………. 5

1.2.2. Protection Circuits ………………………………………………………. 6

1.2.3. Features ………………………………………………………………. 6

1.2.4. The Advantages of OM2000A+ …………………………………………… 6

2. SAFETY INSTRUCTIONS ………………………………………………………. 7

3. GENERAL DESCRIPTION ………………………………………………………. 8

3.1. HF part …………………………………………………………………. 8

3.2. Power Supply …………………………………………………………………. 10

3.3. Safety Devices …………………………………………………………………. 10

4. INSTALLATION ………………………….…………………………. 10

4.1. Grounding ……………………………………………………. 11

4.2. Coaxial Cable ……………………………………………………. 11

4.3. Control Cable ……………………………………………………. 12

4.4. Cooling ……………………………………………………. 12

5. OPERATION ……………………………………………………………. 13

5.1. OM2000A+ Front Panel ……………………………………………. 13

5.2. OM2000A+ Control …………………………………………………… 14

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

5.4. Operation mode ………………………………………………………. 28

6. MAINTENANCE ……………………………………………………. 32

6.1. Indication of Fault Conditions ………………………………………… 32

6.2. Fuse Replacement ……………………………………………..……. 34

6.3. Tube Replacement ………………………………………………..…. 34

6.4. Cleaning …………………………………………………... 34

7. APPENDIX ……………………………………………………………. 34

7.1. Primary AC selection …………………………………………………… 34

7.2. Removing the HV Transformer ……………………………………………. 36

7.3. Controlling OM200A+ with FLEX Radio Series 6xxx ………………………37

7.4. OM2000A+ Remote Control ………………………………………………. 39

7.5. Remote Control using own public IP Address ........................................ 44

7.5.1. Changing OM2000A+ connection settings ............................................ 44

7.5.2. Setting up in the Remote software .......................................................... 45

7.5.3. Remote Control without own IP Address, behind a router ..................... 46

7.6. OM2000A+ firmware upgrade …………………………………….………. 47

7.7. Icom connection with OM2000A+ ………………………………...……… 53

7.8. Yaesu plus BPF plus ANT Switch connection with OM2000A+ ………. 54

7.9. Control panel connectors pin-out ……………………………………..…… 55

7.10. Block Diagram of the OM2000A+ Power Amplifier ………………………… 59

7.11. Troubleshooting …….………………………………………….……………. 60

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

1500 W in RTTY

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 220V, 230V, 240V, 50/60 Hz or other primary

voltages…. (200V 50/60Hz for Japan)

Transformers One toroidal transformer 3kVA

Dimensions 390 x 195 x 370 (width x height x depth)

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 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

1.2.3. 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. The PA is usable also with radios, which doesn´t have CAT (automatic

frequency reading even if no CAT). Possibility of using BAND DATA information.

•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 possibility (remote software as accessory – no extra price) 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 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. DO NOT ATTEMPT TO SHORT OR

BYPASS safety switch under upper lid!

The OM2000A+ 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 AT LEAST 10 minutes allowing the electrolytic capacitors to discharge fully.

Disconnect power cord from the outlet!

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

only by professionally 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

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. 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 part

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 given 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 capacitor for TUNE and LOAD are divided.

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

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).

The separated supply for screen grid is regulated by stabilization with MOSFET 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).

Primary section of the transformer is adjustable for 230 - 250 VAC. Factory setting is 240VAC.

If the AC voltage in your network is 230 or 250 Volts, you need to set the correct value before

first starting of 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 element is mechanical

switch for AC blocking at opened amplifier.

4. INSTALLATION

Read this chapter carefully prior you will start 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.

Type of supported TCVR and working

frequency are visible on the display.

AUTO LED is ON.

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