8251 Series
8251 Series
Bird
1000 Watt, Oil-Cooled RF Termination
8251 Series, RF Loads are portable, self-contained general purpose 50 ohm coaxial transmission line RF terminations requiring no outside power source or additional equipment. The loads are Oil-assisted convection cooling for safe, continuous operation up to 1000W full rated power. They provide accurate, dependable, and practically non-reflective termination for testing and adjusting transmitters under non-radiating conditions. The load consists essentially of a cylindrical film type resistor immersed in a dielectric coolant. The resistor, individually selected for its accuracy, is enclosed in a special tapered housing which provides a linear reduction in surge impedance directly proportional to the distance along the resistor.
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| Attribute | Value |
|---|---|
| Manufacturer | Bird |
| Housing surface finish | Gray Powder Coat |
| VSWR and Frequency Range | DC - 1 GHz @ 1.1 max., 1 GHz - 2 GHz @ 1.25 max., 2 GHz to 2.4 @ 1.3 max., 1.065 max., 470-860 MHz for "D" Models |
| Coolant | 1.1 gal. (4.1 liters) Silicon Oil |
| Operating Position | Horizontal Only |
| Cooling Type | Oil-Cooled |
| Connectors | See Model Matrix |
| Temperature Range | -40 to +45 °C |
| Dimensions | 17-29/32" x 5-15/16" x 8-1/2" (L x W x H), 455 x 151 x 216 mm |
| Attribute | Value |
|---|---|
| Data Sheet | Click here to view |
