ACOM 1003 1000 W tube
HF + 6 m linear amplifier with 3CX800A7 triode, 1000 W PEP / 900 W carrier, 3 antenna outputs, QSK
The ACOM 1003 is a complete, self-contained linear amplifier for all amateur bands from 1.8 to 54 MHz: it delivers 1000 W PEP or 900 W continuous carrier with less than 80 W of drive.
Product description
Antenna tuning is easy thanks to the TRI (True Resistance Indicator), a bar scale for precisely setting the real part of the plate load impedance. A panel-controlled input attenuator reduces drive during tuning and restores it afterwards, without touching the transceiver.
No external tuner is needed for antenna SWR up to 3: even under these conditions the amplifier delivers 1000 W forward. The two-line OLED display shows the peak power bar, text messages and 18 selectable parameters.
RX/TX switching with a silent HF reed relay is compatible with CW QSK. Three antenna outputs are selected from the front panel. The amplifier uses a single 3CX800A7 ceramic-metal triode in grounded grid, cathode driven, and works with any transceiver: all it needs is "ground on TX" (PTT) and 50–80 W of drive.
You can choose class AB2 for the best linearity in SSB or class B to reduce plate dissipation in continuous digital modes, as well as full power or power reduced to 50% without loss of efficiency. Airflow is controlled automatically and the factory-tuned input low-pass filters give an input SWR below 1.3 on every band.
Key features
900 W continuous carrier.
For antenna SWR up to 3.
Selectable from the panel.
HF reed relay.
Documentation
The user manual is supplied by ACOM in PDF format and in English only.
Technical specifications
| Coverage | Amateur bands 1.8–54 MHz |
| Output power | 1000 W PEP · 900 W continuous carrier |
| Drive | 50–80 W |
| Tube | 3CX800A7 triode, grounded grid |
| Operating class | AB2 or B, selectable |
| Input SWR | < 1.3 on every band |
| Antenna matching | up to SWR 3 |
| Antenna outputs | 3 |
| Display | Two-line OLED, 18 parameters |
| Switching | HF reed relay, QSK |
| Protections | Continuous monitoring, tube protection, RF output arc protection, band change protection |
| Fault memory | Last 8 serious protection events |
| Power supply | 90–132 / 180–264 V AC, 50–60 Hz, single phase, up to 2000 VA at 240 V |
HamRadioShop | Linear amplifiers
