The ENI Model A500 is an all solid state amplifier which has a flat frequency response from .3 mHz to 35 mHz. It provides 500 watts of linear power with low harmonic and Intermodulation distortion. Gain is 60 dB nominal, with a variation of less than +1.0 dB over the entire frequency range. Input and output impedance are 50 dims and the unit may be driven to full power output by most RF synthesizers, signal generators and swept signal sources. The ENI Model A500 will deliver its rated power output into any load impedance, regardless of match. Built-in protection circuitry will absorb the power reflected from a mismatched load without causing failure or oscillation. Output RF voltage is displayed on the front panel meter. Its integral power supply and cooling operate from a 230 VAC 50/60 Hz main supply. The Model A500 will raise the power level of signal sources and generators without requiring tuning or bandswitching. The Class A linear circuitry will amplify signals of AM, FM, SSB, TV and complex modulations limited only by their peak input and bandwidth, with minimum distortion.