Amplifier Research 75A250A RF Amplifier 75W 250 MHz Portable Broadband Solid State Amplifier
The Amplifier Research 75A250A amplifier is a portable, self-contained, air-cooled, broadband, solid state amplifier unit designed for laboratory applications where instantaneous bandwidth, high gain and moderate power output are required. When used with an RF sweep generator, the 75A250A will provide a minimum of 75 watts of swept RF output power.
The Model 75A250A includes a front panel RF Gain Control, which permits the operator to conveniently set the amplifier's desired output level. The digital display on the front panel indicates the operation status and any pending fault conditions when an over temperature or power supply fault has occurred.
Utilization of push-pull MOSFET circuitry lowers distortion, improves stability and allows operation into any load impedance without damage. Housed in a stylish contemporary enclosure, the unit provides instantaneous power for typical applications such as RF susceptibility testing, antenna and component testing, Watt-meter calibration and as a driver for higher power amplifiers.
The 75A250A is powered by a high efficiency switching supply, with autoranging AC input circuitry which will automatically accept voltages from 90 to 135 VAC, or from 180 to 270 VAC, in the 47 to 63 Hz frequency range. The unit also includes digital control for both local and remote control of the amplifier, with IEEE-488 (GPIB) and asynchronous full duplex RS-232 communication control of all amplifier functions.
- Frequency: 10 kHz - 250 MHz
- Rated Output Power: 75W
- Gain: 49 dB min
- Noise Figure: 16 dB typical
| Power Output, CW Nominal | 100 watts |
| Power Output, CW Minimum | 75 watts |
| Linear @ 1 dB 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 |
| 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 |
| Noise Figure (above 1.0 MHz) | 16 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 |
| Cooling | Forced air (self contained fans) |
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