ACOM 1400S - Solid-State 1.8-54 MHz Linear Amplifier

Usage

The ACOM 1400S is a state-of-the-art linear power amplifier that covers all amateur bands from 1.8 through 54 MHz and provides 1200 W output power (PEP or continuous carrier). The amplifier operating information is shown on a separate Remote Control Unit (RCU) equipped with a touch screen.

Easy to operate

The overall operation of ACOM 1400S is extremely simplified: the touch screen menus on the RCU are intuitive and easy to follow, and no special skill is required from the operator when changing frequency bands.

User-friendly automatic control

When connected to a transceiver with CAT capability, the amplifier will track the operating frequency, and will change bands accordingly. Even if not CAT connected, the amplifier monitors the input signal frequency through the built-in frequency counter and automatically switches bands.

High resolution color touch display

Amplifier status indications are explained via detailed text displayed on the RCU 7" high resolution color touch display. All indicators and controls (except the primary mains switch and power indicator) are accessible via the RCU's touch screen, as well as, all command input to the RCU is menu-driven.

Transceiver-independent

Compatible with all transceiver models - does not need any special signals: "ground on transmit" and less than 50 W of RF drive power is sufficient.

Remote control capabilities

Remotely controlled via the Internet through integrated Web interface and Ethernet RJ45 port.

LDMOS transistor technology

The final PA stage uses a rugged 65 V LDMOS transistor for heavy operation modes.

Broadband input circuit

Broadband input circuit, providing a perfect transceiver load with SWR below 1.2 (typically 1.1), without retuning throughout the whole frequency range from 1.8 to 54 MHz.

Intelligence

Takes care of itself during operation via continuously working protection circuits in all modes. The operator can monitor many parameters of the amplifier in operation.

Easy maintenance

Detailed data (55 parameters) about each of the last 28 hard-fault protection trips is stored in the amplifier's memory.

​Compact construction

Extremely compact construction with built-in switching-mode power supply (SMPS) that operates with an extended mains voltage range of 90-264 VAC, with no internal switch over. The consumed current is purely sinusoidal, Power Factor Corrected (PFC) and inrush current limited. This makes the operation of unstable mains and generators easy and trouble free.

Electromagnetic compatibility

Perfect electromagnetic compatibility (EMC) with both highly sensitive devices and the powerful devices in the radio station (receivers, computers, other amplifiers) exceeding the standard EMC requirements due to the used PFC and built-in radio-frequency filters.

Standard Frequency Coverage

All amateur bands from 1.8 through 54 MHz:

1.800 - 2.000 MHz (160 m band)

3.500 - 4.000 MHz (80 m band)

5.020 - 5.455 MHz (60 m band)*

7.000 - 7.300 MHz (40 m band)

10.100 - 10.150 MHz (30 m band)

14.000 - 14.350 MHz (20 m band)

18.068 - 18.168 MHz (17 m band)

21.000 - 21.450 MHz (15 m band)

24.890 - 24.990 MHz (12 m band)

28.000 - 29.700 MHz (10 m band)

50.000 - 54.000 MHz (6 m band)*

(*) Please, refer the applicable regional band plans and laws for specific allocations and limitations;

In specific business cases, extensions or changes of the frequency coverage can be discussed, but this must be agreed upon before ordering. In any case, this is not the producer's obligation and can not be against local rules and laws.

Rated Output Power

1200 W ±0.5 dB, PEP or continuous carrier, without mode limitation, at 200-264 VAC mains;

600 W if operated at 90-132 VAC mains.

Intermodulation Distortion (IM3)

Better than 31 dB below rated PEP;

Harmonic and Parasitic Emissions Output Suppression

-60 / -70 dB or less (HF/50 MHz band);

Input and Output Impedances

Nominal value: 50 Ohm unbalanced, UHF (SO-239) type connectors;

Input circuit: Broadband, SWR below 1.2 (1.1 typically), 1.8-54 MHz continuous range without retuning or switching;

RF bypass path: SWR - below 1.1, 1.8-54 MHz;

Acceptable SWR at the output load (the antenna): up to 3 with proportional power reduction and up to 1.5 for full output power;

RF Power Gain

14 dB ±1 dB (typically 50 W for 1200 W output power);

Mains Power Supply Voltage

100-240 VAC, ±10%, 50-60 Hz, Single phase;

Mains Power Consumption at Full Output Power

Power factor of 0.95 or higher;

Up to 3100 VA at rated output (200 VAC);

Up to 2000 VA at 600 W output from 100/120 VAC;

Mains Power Consumption in Low Energy (Waiting) Mode

Less than 1 VA;

Receive / Transmit Control

KEY-IN - Phono RCA connector

Voltage applied to the transceiver keying output - up to +12 V;

Closed-circuit current flow to the transceiver keying output - up to 6 mA;

KEY-OUT - open-drain Phono RCA connector

Output resistance: not more than 120 Ohm;

The maximum allowable open-circuit voltage coming from external devices connection: +50 V;

Maximum allowable closed-circuit current flow by external devices: 20 mA;

Minimum required time of sequencing between sending a request for transmitting (KEY-IN "ground on transmit" signal) and applying RF drive power at RF INPUT connector for safely switching receive to transmit: 10 ms.

Amplifier - RCU Cable Length

1.5 m;

Safety and Electromagnetic Compatibility

Complies with CE safety and electromagnetic compatibility requirements;

The FCC (US Federal Communications Commission) certification is in process of organization as of October 2024;

Size & Weight (operating, excluding connected cables)

Amplifier, WxDxH: 372x418x170 mm, 14,6 kg (14.7x16.5x6.7 inches, 32.2 lbs.);

Remote Control Unit, WxDxH: 179x118x86 mm, 0.730 kg (7.1x4.7x3.4 inches, 1.6 lbs.);

Shipping Size & Weight

Please, contact us for shipment details;

Operating environments

Temperature range: -10 to +40 degrees Celsius (14 degrees F to 104 degrees F);

Relative air humidity: up to 95% @ +35 degrees Celsius (95 degrees F);

Height above sea level: up to 3050 m (10000 ft) without output deterioration.