OM POWER OM2500 A-F, Instruction Manual

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1. GENERAL INFORMATION
1.1. Introduction
The OM Power model OM2500A-F is a fully automatic, full legal limit amplifier, designed
for heavy duty use on all short wave amateur bands from 1.8 to 29.7 MHz (including WARC
bands) and all modes with no time limit. It is equipped with one FU-728F ceramic tetrode.
THE ADVANTAGES OF OM2500A-F
Full compatibility with: ICOM, ELECRAFT ,KENWOOD, TEN-TEC ORION ,
Yaesu and CI-V data.
Automatic switching between bands
Automatic tuning with the band according to segments
Automatic switching of band pass filter
Automatic switching of antenna switches
The possibility to use 2 different antennas
within one band or segment
1.2. Specification
1.2.1. Parameters
Frequency Coverage
Amateur Bands 1.8 – 29.7 MHz including WARC
Power Output 1500w PEP continuous output all modes - *no time
limit*
Input Power 40 to 60W for full output power
Input Impedance 50 Ohm, VSWR < 1.2 : 1
Power Gain 15 dB
Output impedance 50 Ohm unbalanced
Maximum output SWR 2:1
SWR protection: automatic switching to STBY , when reflected power is
350Wor higher
Intermodulation distortion 34 dB below nominal output
Suppression of harmonics < -50 dBc second, < -65 dBc third
Tube FU-728F Ceramic tetrode
Cooler Centrifugal axial blower
Power supply 240 V - 60 Hz
Transformers 2 pcs of toroidal transformer 2,0 kVA
Parameters 485 mm x 200 mm x 455 mm [19.1” x 7.9” x 17.9”]
(width x height x depth)
Weight 41,5 kg ( 92 lb )
1.2.2. Protection Circuits
There are 8 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.

VSWR too high

Anode current too high