ACOM 1000 1000 W 4CX800A
HF + 6 m linear amplifier with 4CX800A (GU74B) tetrode, 1000 W PEP or continuous carrier, built-in antenna tuning
The ACOM 1000 is a tube linear amplifier for all amateur bands from 1.8 to 54 MHz, with 1000 W PEP or continuous carrier with no mode limits and a single 4CX800A (GU74B) tetrode.
Product description
The load resistance indicator, together with the automatically controlled input attenuator, allows fast and accurate antenna tuning, typically in 5–10 seconds. The automatic return-to-operate function saves manual intervention.
The amplifier also works as an antenna tuner for SWR up to 3:1, so you can change antennas quickly and use them over a wider range. It withstands up to 300 W of reflected power, overdrive peaks of up to 100 ms and tuning errors; it delivers more than half power at 75% of mains voltage and tolerates voltage dropouts of up to 10 ms and overvoltages of up to 15%: useful in field days and DXpeditions.
The backlit dot-matrix LCD shows text messages, 12 parameters and the PEP peak power bar. The bypass and antenna relays are very quiet, even in CW. The memory stores data on the last 7 protection trips for diagnosis.
Key features
PEP or continuous carrier.
Antenna SWR up to 3:1.
Handles 300 W reflected and weak mains.
Technical specifications
| Coverage | Amateur bands 1.8–54 MHz |
| Output power | 1000 W PEP or continuous carrier, no mode limits |
| IMD | better than 35 dB below rated power |
| Hum and noise | better than 40 dB below rated power |
| Harmonics | better than 50 dB (1.8–29.7 MHz) · 66 dB (50–54 MHz) |
| Impedance | 50 Ω unbalanced, UHF connectors (SO-239) |
| Input SWR | < 1.3:1 on 1.8–54 MHz, without tuning or switching |
| Bypass SWR | < 1.1:1 |
| Output matching | SWR 3:1, higher at reduced power |
| RF gain | 12.5 dB typical (50–60 W for rated power) |
| Tube | 4CX800A (GU74B) ceramic-metal tetrode, 800 W dissipation, forced air |
| Power supply | 170–264 V (taps 200–240 V; 100–120 V on request), 50–60 Hz, single phase, 2000 VA |
| Dimensions and weight | 422 × 355 × 182 mm, 22 kg |
| Operating environment | 0…+50 °C, humidity up to 75% at 35 °C, up to 3000 m a.s.l. |
| Compliance | CE (safety and EMC), FCC |
HamRadioShop | Linear amplifiers
