Download the MFJ-264 Manual The MFJ-264 is ham radio's most versatile 50 Ohm dummy load. It does it all -- works with all radios from 160 Meters through 650 MHz and from QRP to the full 1500 Watt legal limit. The MFJ-264 has a SO-239 connector. You get SWR below 1.3 to 650 MHz and 1.1 at 30 MHz. Handles 100 Watts for 10 minutes, 1500 Watts for 10 seconds. It has a strong lightweight aluminum construction. The MFJ-264 Dry Dummy Load measures 3W x 3H x 9D inches and comes with MFJ's famous No Matter What one year limited warranty. Specifications 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 350'C FREQUENCY RANGE: 1-650 MHz; usable to 750 MHz