Mfj-264 Dry Dummy Load, 1.5kw, 0-600 Mhz , SO-239 Input IMPEDANCE: 50 OHMS VSWR: Less than 1.3:1 at less than 650 MHz POWER DISSIPATION: 1500 Watts for less than 10 seconds -- 100 Watts for 10 minutes VOLTAGE GRADIENT: 10 kV / inch OPERATING TEMPERATURE: Up to 350C