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Amplifier Research 600A225A 10KHz - 225MHz, 600 Watts CW Solid State Amplifier


  • 10 kHz - 225 MHz
  • 600 W CW
  • M1 - M9
  • LCD touch screen 
  • Gain control, pulse input capability, RF sample ports
  • LDMOS circuitry


  • RF Immunity Testing
  • Particle Accelerators
  • Telecommunications
  • Antenna / Component Testing
  • Plasma Generation
  • Watt Meter Calibration

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Test Equipment Description

The Amplifier Research 600A225A is a self-contained, air-cooled, broadband, completely solid state amplifier designed for applications where instantaneous bandwidth and high gain are required. Push-pull LDMOS circuitry is utilized in all high power stages in the interest of lowering distortion and improving stability. The Model 600A225A, when used with an RF sweep generator, will provide a minimum of 600 watts of swept power.

The Model 600A225A is equipped with a Digital Control Panel (DCP) which provides both local and remote control of the amplifier. The DCP uses a color LCD touch screen and a single rotary knob to offer status reporting and control capability. The display provides operational presentation of Forward Power and Reflected Power plus control status and reports of internal amplifier status. Special features include a gain control, pulse input capability, forward RF sample port, and a reflective RF sample port for precise power measurements.

All amplifier control functions and status indications are available remotely in GPIB/IEEE-488, RS-232, RS-232 fiber optic, Ethernet and USB format. The buss interface connectors are located on the back panel and positive control of local or remote operation is assured by a switch on the front panel of the amplifier. High efficiency universal input, power factor corrected switching power supplies provides DC to all internal subassemblies.

Housed in a stylish, contemporary enclosure, the Model 600A225A provides readily available RF power for typical applications such as RF susceptibility testing, antenna and component testing, watt meter calibration, particle accelerators, plasma generation, communications and use as a driver for higher power amplifiers. The export classification of this equipment is EAR99. These commodities, technology or software are controlled for export in accordance with the U.S. Export Administration Regulations. Diversion contrary to U.S. law is prohibited.

600A225A Typical Power Output

Amplifier Research 600A225A Specifications
INPUT FOR RATED OUTPUT 1.0 milliwatt maximum
POWER OUTPUT @ 3 dB compression Nominal: 600 watts
Minimum : 550 watts
POWER OUTPUT @ 1 dB compression Nominal: 550 watts
Minimum: 400 watts
FLATNESS ± 2.5 dB maximum
FREQUENCY RESPONSE 10 kHz–250 MHz instantaneously
GAIN (at maximum setting) 58 dB minimum
GAIN ADJUSTMENT (continuous range) 20 dB minimum
INPUT IMPEDANCE 50 ohms, VSWR 1.5:1 maximum
OUTPUT IMPEDANCE 50 ohms, nominal
MISMATCH TOLERANCE 100% rated power without foldback up to 6.0:1 mismatch, above which may limit to 300W reflected power. Will operate without damage or oscillation with any magnitude and phase of source and load impedance.
MODULATION CAPABILITY Will faithfully reproduce AM, FM, or pulse modulation appearing on the input signal
HARMONIC DISTORTION Minus 20 dBc maximum at 400 watts
RF POWER DISPLAY 0–750 watts full scale
PRIMARY POWER 180–264 VAC 47–63 Hz, 2500 watts maximum @ 0.99 P.F. typical
RF input Type N female, front
RF output Type N female, front
Forward Sample BNC female on front panel (coupling factor 60 dB typical)
Reverse Sample BNC female on front panel (coupling factor 60 dB typical)
Pulse Modulation Input BNC female on rear panel
Safety Interlock 15 pin female Type D on rear panel
IEEE-488 24-pin female on rear panel
RS-232 9 pin female Type D on rear panel
RS-232 (Fiber optic) Type ST on rear panel
USB Type B female on rear panel
Ethernet RJ-45
COOLING Forced air (self-contained fans)
WEIGHT, maximum 45.8 kg (101 lb)
SIZE (W x H x D) 50.3 x 34 x 56.9 cm19.8 x 13.4 x 22.0 in

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