Bird Technologies 8630-108 - Bird 86-108 self-cooling, low reflection, non- radiating terminations for high power 50 ohm RF transmission lines

The 8630 series Loads are capable of continuous power dissipation of 10 kW with a voltage standing wave ratio (VSWR) of less than 1.1 to 1.0 from 1 kHz to 1000 MHz. The respective models provide direct connection to 3-1/8 inch and 1-5/8 inch 50 ohm coaxial lines.

The equipment consists of three basic systems: the RF load assembly, the control system, and the heat exchanger system. The load assembly contains the resistor element with its internal water cooling system. The control system includes the electrical circuitry required to prevent damage to the transmitter in case of malfunction of the load, and to protect the RF load should the water flow slow down. The heat exchanger components consist essentially of the pump/motor, the side blower, the coolant collector tank, and a finned cooling coil unit opposite the blower.

When used in conjunction with the appropriate Bird Model Thruline Wattmeter, such as those in the 4600A, 4800A or 4712 series, the Moduload Coaxial Load may be used for direct RF power measurements within the equipment ratings.