ACOM A2100 1500 W 4CX1000A
HF + 6 m linear amplifier with 4CX1000A tetrode, 1500 W continuous carrier, TRI, OLED display, 3 antenna outputs
The ACOM A2100 is a tube linear amplifier for all amateur bands from 1.8 to 54 MHz, with 1500 W continuous carrier and no mode limits, based on a single 4CX1000A tetrode.
Product description
The TRI, together with the automatically controlled input attenuator, lets you match the antenna to the optimum load impedance of the tube quickly and precisely, typically in 5–10 seconds. The automatic return-to-operate function avoids unnecessary manual intervention.
No external tuners are needed for antenna SWR up to about 3:1: antennas can be switched almost instantly and used over wider ranges.
It is designed to withstand up to 400 W of reflected power, overdrive peaks up to 100 ms, RF "tails" after PTT release and tuning errors. It keeps working on a weak mains supply, delivering more than half power at 85% of the rated voltage, and tolerates voltage drops up to 10 ms and 15% overvoltage: useful for field days, DXpeditions and generator operation.
The high-brightness OLED display shows all indications as text, with peak power always on the top line. The vacuum bypass and antenna relays are practically silent even in QSK. The memory stores data on the last 7 protection trips for diagnostics.
Key features
No mode limits.
Antenna SWR up to 3:1.
Withstands 400 W reflected and unstable mains.
Selectable from the front panel.
Technical specifications
| Coverage | Amateur bands 1.8–54 MHz |
| Output power | 1500 W continuous carrier, no mode limits |
| IMD | better than 32 dB below rated output |
| 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 over 1.8–54 MHz, without tuning or switching |
| Bypass SWR | < 1.1:1 |
| Output matching | SWR 3:1, higher at reduced power |
| RF gain | 13.5 dB typical (50–85 W for rated output) |
| Tube | 4CX1000A tetrode, 1000 W dissipation, class AB1 |
| Power supply | 85–132 V and 170–264 V, 50–60 Hz, single phase, 3500 VA (taps 100–240 V, +10% −15%) |
| Dimensions and weight | 445 × 375 × 205 mm, 29.3 kg |
| Operating environment | 0…+50 °C, humidity up to 95% at 35 °C, up to 3000 m above sea level |
| Compliance | CE (safety and EMC), FCC |
HamRadioShop | Linear amplifiers
