General description of the OM1700+ HF and 50 MHz Amplifier
The linear amplifier OM1700+ is designed for all shortwave amateur bands from 1.8 to 29 MHz (including WARC bands) + 50 MHz and all modes. It is equipped with a ceramic tetrode 4CX1500B.
Specification of OM1700+:
| Frequency coverage: | Amateur bands (1.8 – 29.7) MHz including WARC + 50 MHz |
| Power output: | 1700 W in SSB/CW on HF bands, 1300 W on RTTY, 1000 W FT8 1500 W in CW/SSB on 50 MHz, 800 W in FT8/FT4 on 50 MHz |
| Input power: | 40 to 60 W for full output power |
| Input impedance: | 50 ohm, VSWR < 1.5 : 1 |
| Power Gain: | 15 dB |
| Output impedance: | 50 ohm unbalanced |
| Maximum output SWR: | 2:1 |
| SWR protection: | Automatic switching to STBY when reflected power is 250 W or higher |
| Intermodulation distortion: | -32 dB below nominal output |
| Suppression of harmonics: | < -50 dBc on HF, < -70 dBc on 50 MHz |
| Tube: | 4CX1500B ceramic tetrode |
| Cooling: | Centrifugal blower + axial blower (external) |
| Power supply: | Switchable 220/230/240 V - 50/60 Hz |
| Transformers: | 1x toroidal transformer 3 kVA |
| Current max.: | 20 A (recommended minimal IE 20 A circuit breaker) |
| 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: | - 4.3" color touch screen display |
| Features: | - High level of protections |
| - Memory for faults and warning, easy maintenance | |
| - Automatic set-up anode current (BIAS) – no need to adjust manually after changing the tube | |
| - Many operational parameters on display | |
| - Full QSK with silent vacuum relay | |
| - Easy transport due to detachable HV transformer | |
| Mechanical parameters: | 390 mm x 195 mm x 370 mm / 15.35" x 7.67" x 14.56" (width x height x depth) |
| Weight: | 24 kg (53 lb) |