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    2500 Watts DC to 2.5 GHz
    5000 Watts w/BA-300 Optional Blower Assembly

    8890-300 Termaline® RF Coaxial Termination

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    2.5 kW, Oil-Cooled, LC Female or Type N Female

    • Rugged load for high power base station RF testing up to 2.4 GHz.
    • Oil-assisted (vented) convection cooling for safe, continuous operation to 2.5KW.
    • Add blower option BA-300 for 5 KW Continuous operation
    • Add thermal switch for automatic shutdown if overheated 8890-008
    • Shipped with LC connector installed, N(F) optional. Compatible with all Bird QC connectors.
    • Simple but rugged design minimizes maintenance requirements.
    • Ambient Temperature Range: -40°C to +45°C
    • Connector: QC-LC(F) or Type N(F)
    • Finish: Gray powder coat
    • Frequency Range and VSWR:
      DC to 1 GHz at 1.1 max
      1 GHz to 2 GHz at 1.25 max
      2 GHz to 2.4 GHz 1.3 max
    • Impedance: 50 ohms nominal
    • Load Coolant: 2.9 gal. (11 liters) silicone oil (included)
    • Nominal Size: 23 1/8" L x 7" W x 17 3/16" H, (587 mm x 178 mm x 437 mm)
    • Operating Position: Horizontal Only
    • Power Rating: 2500 W continuous (5 kW with optional BA-300 Blower)
    • Weight: 57 lbs. (26 kg)


    The Model 8890-300 TERMALINE® Load Resistor is a self-contained high-power 50 ohm coaxial transmission line termination requiring no outside power source or additional equipment. It provides 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. This produces the uniform, practically reflectionless line termination from dc to 2.4 GHz.
    Bird Specifications and Manual