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General description of the OM2501HF amplifier

The linear amplifier OM2501HF is a manual tune designed for all short wave amateur bands from 1.8 till 29 MHz (including WARC) and all modes. It is equipped with an one piece of ceramic tetrode FU728F or GU84B.

Specification of OM2501HF:

Frequency coverage: Amateur bands (1.8 – 29.7) MHz including WARC
Power output: 2500 W in SSB and CW on HF bands,
2000 W in RTTY, AM and FM
Input Power: Usually 30 to 60 W for full output power
Input Impedance: 50 ohm, VSWR < 1.5 : 1
Power Gain: 17 dB
Output Impedance: 50 ohm unbalanced
Maximum Output SWR: 3:1
SWR protection: Automatic switching to STBY, when reflected power is 350 W or higher
Intermodulation distortion: -32 dB below nominal output
Suppression of harmonics: < -50 dBc
Tubes: 1x FU728F or GU84B ceramic tetrode
Cooler: Centrifugal blower + axial blower
Power supply: Switchable voltages - 220/230/240 V for 50 Hz or 230/240/250 V for 60 Hz
(or other primary voltages e.g. 200 V 50/60 Hz for Japan)
Transformers: 2 pcs. of toroidal transformer 2 kVA
Dimensions: 485 mm x 200 mm x 455 mm (width x height x depth)
Weight: 40 kg
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 PA
  - Temperature too high
  - Soft start for protecting your fuses
  - “switch-on blocking“ at opened amplifier
Indications: 4.3" color touch screen display
Features: 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 tubes
  Three programmable working modes of the axial blower
  Full QSK operation
  Many operational parameters to display