Amplifier Research 150A250 RF Amplifier, 100 kHz to 250 MHz

The Amplifier Research 150A250 is a self-contained broadband RF amplifier engineered for laboratory and test environments requiring high instantaneous bandwidth, stable gain, and moderate power delivery. Built on push-pull MOSFET circuitry, it delivers 150 W minimum output across 100 kHz to 250 MHz while maintaining unconditional stability into any load impedance - no damage, no oscillation, no foldback protection needed. The amplifier accepts input signals as low as 1.0 mW for rated output and provides 52 dB minimum gain with ±1.5 dB flatness across its operating range.

Technical Specifications

• Frequency Range: 100 kHz to 250 MHz


• Output Power: 150 W minimum rated; 155 W minimum @ 3 dB compression; 120 W @ 1 dB compression


• Gain: 52 dB minimum with ±1.5 dB flatness


• Input Level for Rated Output: 1.0 mW maximum


• Input Impedance: 50 Ω, VSWR 1.5:1 maximum


• Mismatch Tolerance: 100% rated power into any load impedance without damage or oscillation


• Primary Power: 90–135/180–270 VAC auto-ranging, 47–63 Hz, single-phase


• 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


• Dimensions: 9.9 in (H) × 19.8 in (W) × 18.1 in (D)


• Weight: 70 lb

Key Features

• Push-pull MOSFET design minimizes distortion and ensures load-invariant operation


• Type-N (female) connectors for RF input and output


• Digital front-panel display for status and fault indication


• IEEE-488 (GPIB) and RS-232 remote control interfaces


• Integrated power supply with ±10% mains tolerance

Typical Applications

• RF susceptibility and EMC testing


• Antenna and RF component evaluation


• Watt meter calibration


• Driver amplifier for high-power systems

Compatibility & Integration IEEE-488 and RS-232 interfaces enable integration into automated test systems. The amplifier operates within standard laboratory environmental conditions and meets Pollution Degree 2 specifications.