Showing how the OM-Power Automatic amplifiers like the OM-2500A, OM-4000A, can control the selection of up to ten antennas driving an antenna switch and up to ten filters. A Vector Network Analyzer, Array Solutions’ VNA UHF is plotting the S21 (Filters Insertion Loss) continually.
The OM2500A linear amplifier is designed for all short wave amateur bands from 1.8 to 29.7 MHz (including WARC – bands ) and all modes. It is equipped with the ceramic tetrode FU-728F.
The advantages of OM2500A:
- Automatic switching between bands
- Automatic tuning with the band according to segments
- Automatic switching of band pass filter
- Automatic switching of the antenna switch
- The possibility to use 2 different antennas within one band or segment
-
Full compatibility with
- – ICOM
- – YEASU
- – ELECRAFT
- – Ten-Tec Orion
- – Kenwood
- – Icom transceiver protocol using by microHAM devices, CI-V output (MK II, MK2R, MK2R+, etc)
Specifications of the OM-2500A:
Frequency coverage: Amateur bands 1.8 – 29.7 MHz including WARC
Power output: 2500 W in SSB and CW
2000 W in RTTY, AM and FM
Driver Power: 60 to 80 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 350 W or higher
Intermodulation distortion: 32 dB below nominal output
Suppression of harmonics: < -50 dBc
Tube: FU-728F Ceramic tetrode
Cooler: Centrifugal blower + axial blower
Power supply: 2 x configurable for 220, 230 or 240 V AC – 60 Hz one or two phases
Transformers: Two toroidal transformers 2.0 kVA each
Protection circuits: – SWR too high
– Anode current too high
– Screen current too high
– Grid current too high
– Mistuning of the power amplifier
– Soft start for protecting your fuses
– “Switch –on blocking“ at top cover removal
Bar graph indications: – Power output – bargraph 50 LED
– Reflected power – bargraph 20 LED
– Current at screen ( Ig2 – bar graph 10 LED )
– Anode voltage, anode current, tuning – bargraph 30 LED
LED indicators: – Control grid current ( Ig1 – 2 LED )
– WAIT – Preheating of tube (180 sec )
– STBY– Standby
– OPR – Operating condition
– FAULT – failure, switching off for about 4 seconds
– Inhibit – operating condition
– ANT 1 – which antenna is in use
– ANT 2 – which antenna is in use
– UP – DWN – Listing in menu
– MAN – Manual operating
– AUTO – Automatic operating
– TUNE – Tuning
– ANT – Antenna selection
Parameters: 485 mm (19.1″) W x 200 mm (7.9″) H x 455 mm (17.9″) D
Weight: 40 kg (88 lb)
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