Ametek / Amplifier Research 25A250AM6 Amplifier

The Ametek Amplifier Research 25A250AM6 is a broadband RF power amplifier engineered for laboratory test and measurement applications demanding instantaneous bandwidth, high gain, and moderate power output across a wide frequency range. Built on push-pull MOSFET circuitry, it delivers lower distortion and improved stability while operating reliably into any load impedance without risk of damage. The amplifier faithfully reproduces AM, FM, and pulse modulation on input signals, making it suitable for RF susceptibility testing, antenna and component characterization, watt meter calibration, and as a driver stage for higher power amplifier systems.

Technical Specifications

• 25 W minimum


• 32 W nominal at 3 dB compression


• 20 W nominal at 1 dB compression


• P1dB: 41.76 to 43.01 dBm (15 to 20 W)


• IP3: 54 dBm Frequency Response & Impedance


• Instantaneous bandwidth: 10 kHz to 250 MHz


• Input impedance: 50 ohms


• Output impedance: 50 ohms nominal


• VSWR: 1.5:1 maximum Gain & Linearity


• Gain (maximum setting): 44 dB minimum; 61 dB high range


• Gain flatness: ±1.0 dB maximum


• Harmonics: 20 dBc


• Input for rated output: 1.0 mW maximum Power Supply & Thermal


• Switching power supply with universal auto-ranging input: 90–135 VAC or 180–270 VAC, 47–63 Hz


• Power consumption: 200 W maximum Physical


• Dimensions: 48.3 × 13.2 × 28.7 cm (19.0 × 5.2 × 11.3 in)


• Weight: 15.9 kg (35.0 lb)


• RF connectors: Type N female (front panel input)

Key Features

• Unconditional stability into any load impedance


• ±1.0 dB gain flatness across operating bandwidth


• Modulation-capable design supporting AM, FM, and pulse signals


• Universal mains input eliminates regional power supply requirements

Typical Applications

• RF susceptibility and immunity testing


• Antenna and RF component characterization


• Watt meter calibration and verification


• Driver amplifier for higher power systems

Compatibility & Integration Type N female connectors on input and output ensure standard 50 ohm laboratory connectivity. Load-immune operation enables use with complex or mismatched loads without performance degradation or equipment damage.