Amplified Research 5S1G4 RF Amplifier, 5 Watt, 800 Mhz, 4.2Ghz # 303245

The Amplified Research 5S1G4 is a solid-state, air-cooled broadband RF amplifier delivering 5–8 watts across 0.8–4.2 GHz with instantaneous bandwidth coverage. This self-contained unit operates from a benchtop cabinet configuration or as a removable module for rack mounting. It combines high gain, flat frequency response, and input overdrive protection in a platform tolerant of any load impedance without damage or oscillation.

Technical Specifications

• Frequency Range: 0.8 GHz to 4.2 GHz instantaneous


• Power Output: Minimum 5 W @ 1 dB compression; nominal 7 W @ 1 dB compression; minimum 6.5 W @ 3 dB compression; nominal 8 W @ 3 dB compression


• Gain: 37 dB minimum (maximum setting); 10 dB continuous adjustment range


• Input for Rated Output: 1.0 mW maximum


• Frequency Response Flatness: ±1.5 dB typical; ±2.0 dB maximum


• Input Impedance: 50 Ω nominal; 2.0:1 VSWR maximum


• Output Impedance: 50 Ω nominal


• AC Power: 150 W nominal; dual-range autoselect 90–132 VAC or 180–264 VAC, 50/60 Hz


• Operating Temperature: 5°C to 40°C


• Humidity: 80% maximum up to 31°C, decreasing linearly to 50% at 40°C


• Altitude: Up to 2000 m

Key Features

• RF input leveling circuit protects amplifier stages from overdrive signals exceeding 0 dBm


• Over-temperature shutdown with automatic DC removal if cooling fails; front-panel fault indicator


• 100% mismatch tolerance - operates without damage or oscillation regardless of source and load impedance magnitude or phase


• Front-panel gain control for real-time output adjustment


• Air-cooled design; unobstructed airflow required to prevent thermal shutdown

Typical Applications

• Signal boosting in communication system testing


• Electromagnetic compatibility (EMC) testing


• Antenna and component characterization


• Wattmeter calibration


• EMI susceptibility testing


• Driver stage for frequency multipliers and high-power amplifiers

Compatibility & Integration Designed for indoor benchtop and rack-mount environments. Accepts ±10% supply voltage fluctuation within specified autorange bands. Operates in Pollution Degree 2 environments.