Amplifier Research 75A250 Overview
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The Amplifier Research 75A250 amplifier is a self-contained, broadband unit designed for laboratory applications where instantaneous bandwidth, high gain and moderate power output are required. Utilization of push-pull MOSFET circuitry lowers distortion, improves stability and allows operation into any load impedance without damage. The Model 75A250, when used with an RF sweep generator, will provide a minimum of 75 watts of swept power.
The Amplifier Research 75A250 includes a front panel control which permits the operator to conveniently set the amplifier's desired output level. Housed in a stylish contemporary enclosure, the Model 75A250 provides readily available RF power for typical applications such as RF susceptibility testing, antenna and component testing, watt meter calibration, and use as a driver for higher power amplifiers.
The Amplifier Research 75A250 utilizes a switching power supply with a universal, autoranging input which will automatically accept from 90 to 135 VAC or from 180 to 270 VAC at 47 to 63 Hz.
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POWER OUTPUT CW: Nominal 100 watts Minimum 75 watts Linear @ 1dB compression 50 watts minimum
FLATNESS: ± 1.0 dB maximum
FREQUENCY RESPONSE: 10 kHz - 250 MHz instantaneously
INPUT FOR RATED OUTPUT: 1.0 milliwatt maximum
GAIN (at maximum setting): 49 dB minimum (See Model Configurations)
GAIN ADJUSTMENT (continuous range): 18 dB minimum
INPUT IMPEDANCE: 50 ohms, VSWR 1.5:1 maximum
OUTPUT IMPEDANCE: 50 ohms, VSWR 2.0:1 maximum
MISMATCH TOLERANCE *: .100% of rated power without foldback. 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
NOISE FIGURE: (above 1.0 MHz) 6 dB typical
HARMONIC DISTORTION: Minus 20 dBc maximum at 50 watts
THIRD ORDER INTERCEPT POINT: 57 dBm typical
PRIMARY POWER: 90-135/180-270 VAC 47 to 63 Hz, single phase: 400 watts maximum
RF CONNECTOR (Type): Type N female
COOLING: Forced air (self contained fans)
