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OM2501HF

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: 2500W in SSB and CW on HF bands,
2000W in RTTY, AM and FM
Input Power: Usually 30 to 60W 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 350W or higher
Intermodulation distortion: -32dB below nominal output
Suppression of harmonics: < -50 dBc
Tubes: 1x FU728F or GU84B Ceramic tetrode
Cooler: Centrifugal blower + Axial blower
Power supply: switchable voltages - 220/230/240V for 50Hz or 230/240/250V for 60Hz
(or other primary voltages e.g. 200V 50/60Hz for Japan)
Transformers: 2 pcs of toroidal transformer 2kVA
Dimensions: 485 x 200 x 455mm (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" colour 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