Amplifier Research 50S1G4M3

The Amplifier Research 50S1G4M3 is a solid-state, air-cooled broadband RF amplifier engineered for high gain, linearity, and instantaneous bandwidth across 0.8 GHz to 4.2 GHz. This self-contained unit delivers minimum 50 Watts output power and integrates internal protection circuits for operational reliability. The M3 designation indicates rack-mount configuration with outer enclosure removed for direct integration into standard equipment racks.

Front-panel gain control enables convenient output adjustment. RF input leveling protects the first stage by controlling input levels exceeding 0 dBm. Over-temperature protection automatically removes DC voltage from RF amplifier stages during cooling failures.

The amplifier operates without damage or oscillation across any magnitude and phase of source and load impedance, delivering full rated power without foldback.

Technical Specifications

• Frequency range: 0.8 GHz to 4.2 GHz


• Output power: Minimum 50 Watts


• Input signal level for rated output: Typically 0 dBm maximum


• AC power consumption: Nominal 150 Watts (reference model)


• Cooling method: Air-cooled


• Form factor: Rack-mount (enclosure removed)

Key Features

• Front-panel gain control for output level adjustment


• RF input leveling circuit protecting first stage above 0 dBm


• DC voltage removal from RF stages during over-temperature events


• Unconditional mismatch tolerance across full impedance range


• 100% rated power delivery without foldback


• Broadband instantaneous bandwidth coverage

Typical Applications

• EMC testing environments


• Communication system validation


• Radar system testing


• Driver amplifier for wireless and communication component testing


• Applications requiring undistorted modulation envelope linear performance

Compatibility & Integration The 50S1G4M3 integrates into standard equipment racks via its M3 rack-mount configuration. Similar model series support digital control panels with local and remote operation via IEEE-488 (GPIB) and RS-232 interfaces.