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User:Hp.Baumeler/OM2000+

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Linear power amplifier OM2000+ (left) for all short wave bands of radio amateurs here driven by a Kenwood Transceiver TS-520

The OM2000+ is a linear power amplifier produced by OM Power[1]. The amplifier covers all bands used by shortwave radio amateurs. The amplifier has an amplification of 15 dB and a maximal output power of 2000 Watts. The integrated tube is the ceramic tetrode FU-728F.[2] The tube is aircooled.

The OM2000A+ is an identical power amplifier but with automatic tuning.

Technical data

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Frequency coverage: Amateur bands 1.8 – 29.7 MHz including WARC + 50 MHz
Power output: 2000 W SSB/CW
1500 W SSB/CW bei 50 MHz
1500 W in RTTY
Input power: 40 to 60 W for full output power
Input impedance: 50 Ohm VSWR < 1.5:1
Output amplification: 15 dB
Output impedance: 50 Ohm unbalanced
Maximum output SWR: 2:1
SWR protection: Automatic switching to STBY when reflected power is 250W or higher
Intermodulation distortion: 32 dBc
Suppression of harmonics: min -50 dBc ( 30–54 MHz better than 70dBc)
Tube: FU-728F ceramic tetrode
Cooling: Centrifugal blower + axial blower
Power supply: Switchable 220 V, 230 V, 240 V
50/60 Hz
Transformer: toroidal transformer 3 kVA
Protection circuits: * SWR too high
* Anode current too high
* Screen current too high
* Grid current too high
* Mistuning of power amplifier
* Temperature to high
* Soft start for fuse protection
* “switch–on blocking“ at opened amplifier
Indications: * OLED display 4 x 20 character
* Analog 2 systems meter for forward and reflected power
LED indicators: * ON status
* STBY– standby
* FAULT – warnings and faults indicator
* ON AIR – amplifier in transmitting status
Features: * Antenna switch for 3 antennas
* Memory for faults and warning, easy maintenance
* Automatic set-up anode current (BIAS ) – no need to manual adjust after changing the tube
* Temperature controlled 2-speed centrifugal blower (turbine) + axial blower
* Full QSK with silent vacuum relay
* The smallest and lightest 2000W PA on the market
Mechanical parameters: * Width: 390 mm
* Height: 195 mm
* Depth 370 mm
Weight: 24 kg

References

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