General description and the advantages of the OM3500 A Amplifier
The linear amplifier OM3500 A is designed for all short wave amateur bands from 1.8 till 29 MHz (including WARC – bands ) and all modes . It is equipped with a ceramic tetrode GU78b.
THE ADVANTAGES OF OM2500A
Full compatibility with:
- - ICOM
- - YEASU
- - ELECRAFT
- - Ten- Tec Orion
- - Kenwood
- - Icom transceive protocol using by microHAM devices –CI-V output (MK II, MK2R, MK2R+, etc)
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
Specification of OM3500 A:
| Frequency coverage: | amateur bands 1.8 – 29.7 MHz including WARC |
| Power output: | 3500 W in SSB and CW 3000 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: | 17 dB |
| Output impedance: | 50 Ohm unbalanced |
| Maximum output SWR: | 2:1 |
| SWR protection: | automatic switching to STBY , when reflected power is 350W or higher |
| Intermodulation distortion: | 32 dB below nominal output |
| Suppression of harmonics: | < -50 dBc |
| Tube: | GU78b Ceramic tetrode |
| Cooler: | Centrifugal blower + axial blower |
| Power supply: | 2 x 230 V - 50 Hz one or two phases |
| Transformers: | 2 pcs of toroidal transformer 2.5 kVA |
| Protection circuits: | - SWR too high |
| - Anode current too high | |
| - Screen current too high | |
| - Grid current too high | |
| - Mistuning of power amplifier | |
| - Soft start for protecting your fuses | |
| - “switch –on blocking “ at opened amplifier | |
| 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: | - current at control grid ( Ig1 – 2 LED ) |
| - WAIT – preheating of tube (180 sec ) | |
| - STBY– standby | |
| - OPR – operating condition | |
| - FAULT – failure, switching off for abt. 4 sec | |
| - Inhibit – operating condition | |
| - ANT 1 - which ANT is use | |
| - ANT 2 – which ANT is use | |
| - UP – DWN - listing in menu | |
| - MAN - manual operating | |
| - AUTO - automatic operating | |
| - TUNE - tuning | |
| - ANT - ANT selection | |
| Parameters: | 485 x 200 x 455mm (width x height x depth) |
| Weight: | 44 kg |