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General description of the OM2000A+ automatic amplifier

The automatic linear amplifier OM2000A+ is designed for all short wave amateur bands from 1.8 to 29 MHz (including WARC – bands) + 50 MHz and all modes. It is equipped with a ceramic tetrode FU-728F.

Specification of OM2000A+:

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 RTTY
1500 W CW/SSB on 50 MHz
Drive power: 40 to 60 W for full output power
Input impedance: 50 Ohm VSWR < 1.5 : 1
Output amplification: 17 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: better then -32 dBc
Suppression of harmonics: min -50 dBc (30–54 MHz better than -70dBc)
Response speed of AUTO tune: less than 0,5s within same BAND ,less than 3s if out of BAND
Icom transceive protocol using by microHAM devices – CI-V OUPUT,
Flex Radios and Anan ( Apache Labs )
Tube: FU-728F ceramic tetrode
Cooling: Centrifugal blower + axial blower
Power supply: Switchable 220,230,240V – 50/60 Hz or other primary voltages
(for example 200V 50/60Hz for Japan)
Transformers: 1 toroidal transformer 3.0 kVA
Protection circuits: - 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 power amplifier
  - Temperature to high
  - Soft start for fuse protection
  - “switch –on blocking“ at opened amplifier
Indications: 4.3" colour touch screen display
Features: - Automatic external Antenna switching
  - Automatic switching between bands
  - Automatic tuning within the band according to segments
  - Automatic switching of Band Pass Filter
  - Memory for faults and warning, easy maintenance
  - Automatic set-up anode current (BIAS) – no need to manual adjust after changing the tube
  - Three programmable working modes of centrifugal blower ( turbine ) + axial blower
  - T/R System: QSK operation with built-in vacuum RF antenna relay
  - Easy transport due to detachable HV transformer
  - Remote control - connector for LAN connection
  - The Power Amplifier is HF sensitive (automatic frequency reading even if no CAT)
  - The smallest and lightest 2000 W automatic PA on the market
Mechanical parameters: 390mm x 195mm x 370mm (width x height x depth)
Weight: 24 kg

LAN Connection

Power amplifier is interfaced to LAN via XPORT made by Lantronix (type XP1001000-05R). More info can be found at www.lantronix.com .

Default factory settings of XPORT are:

IP address:

These are strictly default settings. You can modify any of these by going to XPORT web GUI via your web browser. We do not recommend changing any other parameters of the XPORT interface as loss of communication can be caused by doing so. There is no default user name or password. It is highly recommended to secure web interface with username and password.

For remote control and monitoring over LAN special software is needed. It is available free of charge; it can be downloaded from the following address: