Amplifier Research 800A3

The Amplifier Research 800A3 is a solid-state, air-cooled broadband amplifier delivering 800 watts minimum continuous wave power across 10 kHz to 3 MHz. This self-contained unit accepts a maximum input of 1.0 milliwatt for rated output and provides 60 dB minimum gain. The digital control panel enables local and remote operation via IEEE-488, RS-232, and USB interfaces, with real-time displays of forward and reflected power plus internal status monitoring.

Technical Specifications

• Power Output: 800 W CW minimum


• Frequency Range: 10 kHz to 3 MHz


• Input for Rated Output: 1.0 mW maximum


• Gain (maximum setting): 60 dB minimum


• Harmonic Distortion: −20 dBc maximum at 400 W output


• Mismatch Tolerance: Full rated power to 6.0:1 VSWR; above 6.0:1, limited to 400 W reflected power


• Modulation Support: AM, FM, and pulse modulation reproduction within linear power specification


• Primary Power: 85–137 VAC / 180–264 VAC, 47–63 Hz, 2500 W maximum draw


• RF Connectors: Type N female (input and output)


• Cooling: Forced-air with internal fans


• Dimensions: 50.3 × 34.0 × 55.1 cm


• Weight: 36.4 kg

Key Features

• Selectable output impedance matching (12.5, 25, 50, 100, 200, 400 Ω) via internal transformer


• Hot-switching capability using high-voltage/high-current vacuum relays for impedance changes without shutdown


• RF output level protection with integrated circuitry


• Gain control adjustment


• Front panel keylock for operation mode control


• Power-factor-corrected universal input switching supplies


• Operates without damage or oscillation across any source and load impedance combination

Typical Applications Standalone RF testing and amplification, EMC testing, and component characterization across the ELF to MF frequency bands. Configurable as a sub-amplifier in multi-stage 1500 W or 5000 W system architectures.

Compatibility & Integration Remote control via IEEE-488, RS-232, and USB. Back panel buss interface connectors support system integration.