Power amplifier - Rated power output : 500 watts - Input for rated output : 1.0 milliwatt maximum - Frequency response : 10kHz –250MHz instantaneously - Gain (at maximum setting) : 57 dB minimum - Gain adjustment (Continuous range) : 10 dB min - Input impedance : 50 ohms, VSWR 1.5:1 maximum - Output impedance : 50 ohms nominal - Harmonic distortion : Minus 20 dBc maximum at 350 watts - Primary power (specify) : 180~264 VAC, 47 ~ 63Hz, 2500W maximum - Cooling : Forced air (self contained fans) - Weight (approximate) : 45.8 kg (101 lb) - Mismatch tolerance : 100% rated power without foldback up to 6.0:1 mismatch, above which may limit to 250 watts reflected power. Will operate without damage, or oscillation with any magnitude and phase of source and load impedance